Mitsubishi PLA-RP_AA(1), PLA-RP_AA(1).UK, PEA-RP_EA, PEAD-RP_EA, PEAD-RP_EA.UK TECHNICAL MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

No. OCT04

SERVICE TECHNICAL GUIDE

<Indoor unit>
[Model names] [Service Ref]

PLA-RP·AA PLA-RP·AA

PLA-RP·AA

R410A

1

PLA-RP·AA.UK
PLA-RP·AA

PEA-RP·EA PEA-RP·EA.TH-A
PEAD-RP·EA PEAD-RP·EA.UK

PEAD-RP·EA

<Outdoor unit>
[Model names] [Service Ref]

PUHZ-RP·VHA PUHZ-RP·VHA

1.UK

1.UK

PUHZ-RP·VHA-A

CONTENTS

1. PAIRING TABLE OF THE INDOOR AND OUTDOOR UNIT·····2

2. SPECIFICATIONS FOR ELECTRICAL WORK ·························3

3. WIRING DIAGRAM·····································································6

4. REFRIGERANT SYSTEM DIAGRAM ······································11

5. HOW TO CHECK THE PARTS ················································18

6. MICROPROCESSOR CONTROL·············································24

7. INDOOR UNIT CONTROL························································30

8. OUTDOOR UNIT CONTROL····················································38

9. DIP SWITCH FUNCTION ·························································54

10. FUNCTION SETTING ·······························································67

11. TEST RUN • REPLACEMENT OPERATION
& EMERGENCY OPERATION···················································77

12. SELF-DIAGNOSIS····································································83

13. TEST POINT DIAGRAM·························································109

14. TROUBLESHOOTING····························································117

15. SYSTEM CONTROL·······························································121

1

PLA-RP·AA
PLA-RP·AA

1

PLA-RP·AA.UK
PLA-RP·AA

1.UK

PEAD-RP·EA.UK
PEAD-RP·EA

1

.UK

OC293

REVISED EDITION-A

OC297

REVISED EDITION-A

—

RP3VHA RP4VHA RP5VHA RP6VHA

Indoor unit

Outdoor unit [PUHZ]

OC294

PEA–RP·EA.TH-A

OC299

REVISED EDITION-A

RP3VHA-A RP4VHA-A RP5VHA-A RP6VHA-A

Indoor unit

Outdoor unit [PUHZ]

OC300 REVISED EDITION-A

PAIRING TABLE OF THE INDOOR AND OUTDOOR UNITS

2

2

Outdoor unit
Power supply

Phase
Frequency & Voltage
Indoor unit(A)
Outdoor unit(A)

Wire No.

—

25/25

3

—

32/32

3

—

32/32

3

—

40/40

3

Models (Outdoor unit)

~ / N (Single)

50Hz, 220-230-240V

Outdoor unit
Power supply
Input capacity
Main switch/Fuse

Indoor unit/Outdoor unit connecting
Wire No. o size (e)
Remote controller-indoor unit connecting
Wire No. o size (e)

Indoor unit power supply

~ / N (Single), 50Hz, 220-230-240V

Control circuit rating

Wiring

3 o 2.5 cable (Polar)

Cable 2C o 0.69

This wire is accessory of remote controller (Wire length: 10m, Non-polar)

Indoor unit-Outdoor unit: S1-S2 AC220V-230V-240V

S2-S3 DC24V

Remote controller-Indoor unit: DC14V

RP3V RP4V RP5V RP6V

1
2

S1
S2
S3

S1
S2
S3

Indoor/outdoor
unit connection
cable

Indoor
unit

Unit
power
supply

Outdoor
unit

Remote
controller

L

N

Grounding

L
N

1
2

1
2

S1

Indoor
unit

S2
S3

S1
S2
S3

S1
S2
S3

Unit
power
supply

Indoor/outdoor
unit connection
cable

Indoor
unit

Outdoor
unit

Remote
controller

Grounding

1
2

1
2

1
2

S1
S2
S3

S1
S2
S3

S1
S2
S3

S1
S2
S3

Indoor/outdoor
connection cable

Indoor
unit

Unit
power
supply

Indoor
unit

Indoor
unit

Outdoor
unit

Remote
controller

L
N

Grounding

SPECIFICATIONS FOR ELECTRICAL WORK

2-1. Field electrical wiring(power wiring specifications)
PUHZ-RP•VHA
PUHZ-RP•VHA-A

Check items

1. Wiring size must comply with the applicable local and national code.

2. Be careful about choosing the installation location for the earth leakage breaker and how it is installed as the initial electric
current may cause it to malfunction.

3. Power supply cords and indoor unit / Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flex­ible cord. (design 254 IEC 57)

1:1 system Synchronized twin and triple system Electrical wiring

• Synchronized twin

• Synchronized triple

3

2-2. M-NET wiring method

Group
remote
controller

Refrigerant
address 00

M-NET
address 01

A-control
remote
controller

A-control
remote
controller

A-control
remote
controller

Refrigerant
address 00

M-NET
address 02

Refrigerant
address 00

M-NET
address 03

Power
supply
unit for
transmission
wire

Central
remote
controller

M-NET transmission wire

✕ Bad example (Multi spot grounding of shield wire)

Good example 1 (Single spot grounding of shield wire)

Power
supply
appliance

M-NET type
outdoor unit

Central
remote
controller

Power
supply
appliance

M-NET type
outdoor unit

M-NET type
outdoor unit

M-NET type
outdoor unit

M-NET transmission wire

M-NET type
outdoor unit

M-NET type
outdoor unit

Central
remote
controller

Power
supply
appliance

M-NET type
outdoor unit

M-NET transmission wire

M-NET type
outdoor unit

M-NET type
outdoor unit

Good example 2 (Single spot grounding of shield wire)

(Points to notice)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same
conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,

electronic parts on M-NET p.c. board may be burn out.

(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this
because this may cause a malfunction.

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise.

“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.

If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground wire

and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among ground­ing spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield
wire do not form one circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the

installation manual.

4

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

12

~

50

M-NET Address No.

<Setting example>

Switng
setting

SW11
ones
digit

SW12
tens
digit

OFF

ON

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

0

Refuigrant
address

OFF

ON

8

OFF

ON

1

OFF

ON

9

OFF

ON

10

OFF

ON

11

OFF

ON

12

OFF

ON

13

OFF

ON

14

OFF

ON

15

OFF

ON

2

OFF

ON

3

OFF

ON

4

OFF

ON

5

OFF

ON

6

OFF

ON

7

System
controller

A-control
remote
controller

Group A Group B Group C

A-control
remote
controller

TB5

A-control
remote
controller

Refrigerant
address 00

M-NET
address 01

Refrigerant
address 00

M-NET
address 02

Refrigerant
address 01

M-NET
address 03

Refrigerant
address 00

M-NET
address 04

Power
supply
unit for
transmission
wire

A-control
remote
controller

A-control
remote
controller

TB5

Group A Group B

Refrigerant
address 00

M-NET
address 01

Refrigerant
address 01

M-NET
address 02

Refrigerant
address 00

M-NET
address 04

Refrigerant
address 01

M-NET
address 03

Refrigerant
address 02

M-NET
address 05

System
controller

Power
supply
unit for
transmission
wire

● M-NET wiring

(1) Use 2-core x 1.25mm

2

shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block.Connect one core of the

transmission wire (non-polar) to Aterminal and the other to B. Peel the
shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(A, B, S) on M-NET terminal block should be individually wired to the other

M-NET
terminal
block

ABS

Transmission

wire

Ground
wire

Shield
part

outdoor unit’s terminal, i.e. Ato A, B to B and S to S.In this case, choose one of those outdoor units and drive a screw
to fix an ground wire on the plate as shown on the right figure.

2-2-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to Free Combo
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in Free Combo system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET p.c. board of outdoor unit.
(Factory setting: all addresses are set to “0”.)

2-2-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group set­ting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Factory setting:
all switches are OFF. (All refrigerant addresses are “00”.)]

2-2-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above sec­tion. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

w Refrigerant addresses can be overlapped if they are in the different group.

w In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in
the group for the outdoor unit whose refrigerant address is “00”.

5

3 WIRING DIAGRAM

[Servicing]
Fasten terminal of the terminal board "TB4" equips lock system.

To remove the fastened terminal, pull it while pressing the protruding portion (locking lever) of
the terminal. The fastened terminal protruding portion should face upward.

NOTES:

1.Since the outdoor side electric wiring may change be sure to
check the outdoor unit electric wiring for servicing.

2.Indoor and outdoor connecting wires are made with polarities, make
wiring matching terminal numbers (S1,S2,S3).

3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).

Please set the voltage using
the remote controller.
For the setting method, please
refer to the indoor unit Installation
Manual.

TO OUTDOOR UNIT

C

TB4

H2

5

GRILLE

MV

MV

MV

MV

5

5

5

5

TRANSMISSION
WIRES DC12V

MODELS

Manufacture

Service board

MODELS

Manufacture

Service board

SW1

BLK

BLK

BLK

BLK

BLK

BLK

BLU

BLU

TH5

12

PIPE
CN29
(BLK)

REMOCON
CN22
(BLU)

WIRELESS
CN90
(WHT)

SW1

SW2

SWE

VANE
CN6V
(WHT)

POWER
CN03
(RED)

POWER
CN2D
(WHT)

LIQUID
CN21
(WHT)

INTAKE
CN20
(RED)

D.SENSOR
CN31
(WHT)

D.HEATER
CNC (RED)

D.U.M
CNP
(BLU)

FAN
(WHT)

BRN

ORN

YLW

CONTROLLER BOARD
CN02 (WHT)

OUTDOOR UNIT
CN01 (BLU)

CN2S(WHT)

BLK

WHT

YLW

ORN

BRN

YLW

YLW

YLW

YLW

BLK

RED

WHT

CNB

W.B

LED1

LED2

BZ

RU

SW1 SW2

X4

X4

J15

J22J21 J24J23

OFF

ON

OFF

ON

4321

4321

J21J22J23J24

PLA-RP3AA
PLA-RP3AA

1

PLA-RP4AA
PLA-RP4AA

1

PLA-RP5AA

1

PLA-RP6AA
PLA-RP6AA

1

R.B

9

X1

X1

5

31

CN32

CN2LCN41

123

12315

TH1

2

TB5

1

12
TB6

CN2

TH2

DS

3
2
1

DC14V

1
2
3

12

J11

J12

J13

J14

2

121

LED1LED2LED3

ZNR

DP

3

FC

531

1

1

2

ON
OFF

J21

J22

J23

J24

C

MF

I.B

321

P.B

F1

TB4

S1
S2
S3

PLA-RP3,4,5,6AA
PLA-RP3,4,5,6AA

1

1

J11J12J13J142J15

345

ON

OFF

SW2

MODELS

Manufacture

Service board

J22J21 J24J23

OFF

ON

OFF

ON

4321

4321

J21J22J23J24

PLA-RP5AA

10

5

9

8

4

7

6321

123

CONNECTOR (PROGRAM TIMER)
TRANSMISSION LINE)

TERMINAL BLOCK (REMOTE CONTROLLER

REMOTE CONTROLLER BOARD

(0:/15kΩ, 25:/5.4kΩ DETECT)

COND./EVA. TEMPERATURE THERMISTOR

(0:/15kΩ, 25:/5.4kΩ DETECT)

PIPE TEMPERATURE THERMISTOR/LIQUID

(0:/15kΩ, 25:/5.4kΩ DETECT)

ROOM TEMPERATURE THERMISTOR

TRANSMISSION LINE)

TERMINAL BLOCK (REMOTE CONTROLLER

TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)

CN2
TB6

R.B

TH5

TH2

TH1

TB5

TB4

DEW PREVENTION HEATERH2

W.B

SYMBOL NAME

WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER

LED (HOT ADJUST)
SWITCH (HEATING ON/OFF)

LED (RUN INDICATOR)

BZ
LED1

RU

LED2
SW1
SW2

SWITCH (COOLING ON/OFF)

SYMBOL

SYMBOL

NAME

NAME

I.B

INDOOR POWER BOARD
FUSE (4A)
VARISTOR

INDOOR CONTROLLER BOARD
CN2L
CN32
CN41
SW1
SW2
SWE
X1
X4
FC

CONNECTOR (LOSSNAY)

CONNECTOR (REMOTE SWITCH)

CONNECTOR (HA TERMINAL-A)

JUMPER WIRE (MODEL SELECTION)

JUMPER WIRE (CAPACITY CORD)

SWITCH (EMERGENCY OPERATION)

RELAY (DRAIN PUMP)

RELAY (FAN MOTOR)

FAN PHASE CONTROL

C

CAPACITOR (FAN MOTOR)

MF

FAN MOTOR

DP
DS DRAIN SENSOR

P.B

ZNR

F1

DRAIN-UP MACHINE

LED1
LED2

POWER SUPPLY (I.B)

POWER SUPPLY (I.B)

MV

VANE MOTOR

LED3

TRANSMISSION (INDOOR-OUTDOOR)

[LEGEND]

PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA
PLA-RP3AA1 PLA-RP4AA1 PLA-RP5AA1 PLA-RP6AA1
PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK
PLA-RP3AA1.UK PLA-RP4AA1.UK PLA-RP5AA1.UK PLA-RP6AA1.UK

6

PEA-RP3EA.TH-A PEA-RP5EA.TH-A

TO OUTDOOR UNIT

12

TB6

R.B

562341

PIPE TEMPERATURE THERMISTOR/LIQUID
(0˚C/15kΩ, 25˚C/5.4kΩ DETECT)

COND./EVA. TEMPERATURE THERMISTOR
(0˚C/15kΩ, 25˚C/5.4kΩ DETECT)

ROOM TEMPERATURE THERMISTOR
(0˚C/15kΩ, 25˚C/5.4kΩ DETECT)

TH5

TH2

TH1

CN24

NAME

SYMBOL

NAME

SYMBOL SYMBOL

NAME

CN2

R.B

CONNECTOR(PROGRAM TIMER)

REMOTE CONTROLLER BOARD

TERMINAL BLOCK(REMOTE
CONTROLLER TRANSMISSON LINE)

TB6

RELAY(FAN MOTOR)

X6

X5

X4

SWE

SW2

SW1

JUMPER WIRE(MODEL SELECTION)
JUMPER WIRE(CAPACITY CORD)
SWITCH(EMERGENCY OPERATION)
RELAY(FAN MOTOR)
RELAY(FAN MOTOR)

LED3

LED2

POWER SUPPLY(R.B)
TRANSMISSOION(INDOOR • OUTDOOR)

I.B

CN2L

CN41

CN32

LED1

INDOOR CONTROLLER BOARD
CONNECTOR(LOSSNAY)

CONNECTOR(HA TERMINAL-A)

CONNECTOR(REMOTE SWITCH))

POWER SUPPLY(I.B)

FUSE(4A)

INDOOR POWER BOARD

VARISTOR

P.B

F1
ZNR

CAPACITOR(FAN MOTOR)
FAN MOTOR

MF

TB4

TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING LINE)

C

J21J22J23J24

J21J22J23J24

J21J22J23J24

J24J23J22

1

BLU

2

3
2
1

CN31

2
1

2
1

1

2

1
2

J24

J23

J22

P.B

ZNR

X4X5

X6 X5

X6

1357

RED

C

ORN

MF

1.Since the outdoor side electric wiring may change be sure to check the
outdoor unit electric wiring for servicing.

2.Indoor and outdoor connecting wires are made with polarities,make wiring
matching terminal numbers(S1,S2,S3).

3.Symbols used in wiring diagram above are, :Connector, :Terminal (block).

FAN
(WHT)

1.When pressing the CHECK switch twice on the remote controller,the unit
changes to the self-diagnosis mode and will display the check code by
LED(light Emitting Diode)
Refer to the right table for the check codes and abnormarities.

LED3 LED2 LED1

INDOOR UNIT

TRANSMISSION WIRE
DC12V

OFF

ON

4321

Manufacture

<For manufacture>

SW1

[Self diagnosis]

[NOTES]

J21

OFF

ON

SWE

SW2

WIRELESS

INTAKE
CN20
(RED)

LIQUID
CN21
(WHT)

REMOCON
CN22
(BLU)

CN90
(WHT)

POWER
CN2D
(WHT)

POWER
CN03
(RED)

S3

S2

S1

F1

OUTDOOR
CN01(BLU)

3

2

1

CONT.BOARD
CN02(WHT)

CN2S(WHT)

DC14V

1

2

3

2
1

TH1

CN2

TB5

I.B

TH2

513

CN41

CN2L

CN32

X4

BLK

BLU

BRN

WHT

YLW

ORN

BRN

WHT

BLK

YLW
ORN
BRN

SW1

J11

J12

J13

J14

J15

TB4

TH5

1

2

PIPE
CN29
(BLK)

BLU

SW2

MODELS

J14J13J12J11 J15

Service board

OFF

ON

4321

OFF

ON

4321

J21

OFF

ON

4321

3EA

4EA

5EA

6EA

123 5

ON

OFF

4

<For service board>

PEA-RP4EA.TH-A PEA-RP6EA.TH-A

7

PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK
PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK PEAD-RP6EA1.UK

8

PUHZ-RP3VHA
PUHZ-RP3VHA-A

9

PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
PUHZ-RP4VHA-A
PUHZ-RP5VHA-A
PUHZ-RP6VHA-A

10

4

Measurement item

COOL: 2.3 ~ 3.0 HEAT: 2.0 ~ 3.2

0.55 ~ 1.0
50 ~ 100

-2 ~ +18

COOL: 27: HEAT: 20:

COOL: 8 ~ 20

HEAT: 30 ~ 50

COOL: 35 HEAT: 7

COOL: 40 ~ 50 HEAT: 0 ~ 5

Measurement method, remarks

Connect the pressure gauge to the high-pressure check valve.

Connect the pressure gauge to the low-pressure check valve.

Measured with piping surface thermometer.
Measured with piping surface thermometer.

Can be displayed on remote controller.

Measured with piping surface thermometer.
Measured with piping surface thermometer.

High pressure (MPa)
Low pressure (MPa)
Discharge pipe temperature (:)
Suction pipe temperature (:)
Indoor intake temperature (:)
Indoor outlet temperature (:)

Outdoor intake temperature (:)
Outdoor outlet temperature (:)

Pressure/temperature near JIS
standard operating conditions

A

B

C

D

E

F

G

H

Notes : The operation statuses vary depending on the compressor's operating frequency because units are inverter-type.

Outdoor
heat exchanger

Stop valve
(with service port)

Power
receiver

Linear
expansion
valve B Linear

expansion
valve A

4-way valve

Compressor

Ball valve

Indoor heat

exchanger

A

B

C

D

Overload operation

Standard operation

Permissible operation range
Normal operation range

0 0.2 0.4 0.6 0.8 1 1.2

Suction pressure (MPa)

Discharge pressure (MPa)

4.5
4

3.5
3

2.5
2

1.5
1

0.5
0

REFRIGERANT SYSTEM DIAGRAM

4-1. Checking operation statuses PUHZ-RP • HA

4-1-1. Measurement points and items

•The table and diagrams below show the measurement item for each measurement point, and the pressure and temperature
near the ISO T1 standard operating conditions.

•Measure the temperature and pressure of each part by following the descriptions in the table.

•Measurement time: Be sure to wait until the refrigerant circuit has stabilized (30 minutes to 1 hour) before taking
measurements.

4-1-2. Operation pressure ranges

11

4-2. Refrigerant System Diagram

Pipe temperature
thermistor/liquid
(TH2)

Distributor
with strainer
#50

Condenser/evaporator
temperature thermistor
(TH5)

Room temperature
thermistor (TH1)

Refrigerant flow in cooling
Refrigerant flow in heating

Strainer
#50

Strainer
#50

Heat exchanger

Refrigerant GAS pipe connection
(Flare)

Refrigerant LIQUID pipe connection
(Flare)

PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA
PLA-RP3AA1 PLA-RP4AA1 PLA-RP5AA1 PLA-RP6AA1
PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK
PLA-RP3AA1.UK PLA-RP4AA1.UK PLA-RP5AA1.UK PLA-RP6AA1.UK
PEA-RP3EA.TH-A PEA-RP4EA.TH-A PEA-RP5EA.TH-A PEA-RP6EA.TH-A
PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK
PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK PEAD-RP6EA1.UK

12

Distributor

Thermistor TH7
(Outdoor)

Heat exchanger

Refrigerant GAS pipe
connection(5/8F)

Refrigerant LIQUID pipe
connection(3/8F)

Stop valve
(with service port)

Strainer
#100

Power
receiver

Linear expansion valve B

Linear expansion valve A

Strainer
#100

Strainer
#100

Strainer
#100

Thermistor TH6
(Outdoor 2-phase pipe)

Thermistor TH3
(Outdoor pipe)

Service port
(Low pressure)

Service port
(High pressure)

High pressure
switch 63H

Bypass valve

Replace filter

Thermistor TH4
(Discharge)

Compressor

Strainer
#50

4-way valve

Capillary tube
(O.D.4.0OI.D.3.0OL200)O2pcs

Strainer
#100

Strainer
#100

Low pressure
switch 63L

Muffler

Ball valve

Restrictor
valve

PUHZ-RP3VHA

Distributor

Thermistor TH7
(Outdoor)

Heat exchanger

Refrigerant GAS pipe
connection(5/8F)

Refrigerant LIQUID pipe
connection(3/8F)

Stop valve
(with service port)

Strainer
#100

Power
receiver

Linear
expansion
valve B

Linear expansion valve A

Strainer
#100

Strainer
#100

Strainer
#100

Thermistor TH6
(Outdoor 2-phase pipe)

Thermistor TH3
(Outdoor pipe)

Service port
(Low pressure)

Service port
(High pressure)

High pressure
switch 63H

Bypass valve

Oil separator

Thermistor TH4
(Discharge)

Muffler

Strainer
#50

4-way valve

Compressor

Ball valve

Capillary tube
O.D.4.0OI.D.2.4OL500

Capillary tube
O.D.2.5OI.D.0.6OL1000

PUHZ-RP3VHA-A

PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA
PUHZ-RP4VHA-A PUHZ-RP5VHA-A PUHZ-RP6VHA-A

13

4-3. Applicable extension pipe for each model

<Table 4>

Additional refrigerant charging amount for liquid pipe which is one size larger than

standard diameter

[12.7
[12.7

RP3

RP4 — RP6

Liquid pipe dia

Chargeless

30m
50m

100 g addition per 1 m when pipe length exceeds 20 m
100 g addition per 1 m when pipe length exceeds 20 m

20m
20m

Max. pipe length

Additional refrigerant charging amount

15

30m or

above

31 — 40m

0.6Kg

0.6kg

10m or below

41 — 50m

1.2Kg

1.2kg

51 — 60m

—

1.8kg

61 — 75m

—

2.4kg

<Table 2> Additional refrigerant charging amount for pipe of standard diameter

<Table 3>

Outdoor unit

Permitted

pipe length

Additional refrigerant charging amount for pipe

length exceeding 30 m (kg)

PUHZ-RP3

PUHZ-RP4 — RP6

Outdoor unit

PUHZ-RP3

PUHZ-RP4 — RP6

Number of

bends

Height

difference

50m or below
75m or below

Permitted

pipe length

50m or below

75m or below

3.1

5.1

11 — 20m 21 — 30m

3.3

5.3

3.5

5.5

31 — 40m

4.1

0.6

6.1

0.6

4.7

1.2

6.7

1.2

—
—

7.3

1.8

—
—

7.9

2.4

41 — 50m 51 — 60m 61 — 75m

Additional refrigerant charging amount for recharging (above) and pipe length exceeding 30m (below) (kg)

Liquid

pipe

(mm)

Gas
pipe

(mm)

[6.35

[9.52 [12.7

[9.52

OD

Thick-

ness

OD

Thick-

ness

RP3
RP4
RP5
RP6

t0.8

t0.8

[12.7

t0.8

[15.88

t1.0

[12.7

t0.8

[15.88

t1.0

[19.05

t1.0

[15.88

t1.0

[19.05

t1.0

t0.8

t0.8

: Normal piping
: It can be used, however, additional refrigerant charge is required when the pipe length exceeds 20m. Refer to table 4.
: It cannot be used.
: It can be used.
: It can be used, however, the capacity is lowered. Refer to (C) Capacity correction.

<Table 1> Pipe length for 1:1 system

*1: Set DIP SW8-1 on outdoor unit controller board to ON.
*2: The maximum length is 50 m in case of using existing pipes.
*3: The height difference between indoor and outdoor unit should be kept within 30 m for all models.

[Marks in the table above]

10m 30m 30m

50m
50m
50m

10m

50m

(*1)

75m

(*2)

50m

75m

(*2)

75m

(*2)

50m

(*1)

50m

(*1)

50m

(*1)

50m

(*1)

50m

(*1)

4-3-1. 1:1 system
(a) Pipe length

(b) Adjusting the amount of refrigerant

• Additional refrigerant charge is not necessary for the pipe length up to 30 m. When the pipe length exceeds 30 m or service

(refrigerant replacement) is performed, charge proper amount of refrigerant for each pipe length referring to table below.
Use refrigerant R410A. Use charge hose exclusive for R410A.

• When charging additional refrigerant, charge the refrigerant from low-pressure side of the port valve using a safety charger.

• Make sure that air purge for this unit at refrigerant replacement is performed from both high-pressure check valve and ser-

vice port. (If air purge is performed only from one of them, air in not purged enough.)

• When replacing refrigerant, charge the refrigerant from service port. When charged refrigerant is less than specified amount,
charge the refrigerant again from low pressure side of the port valve using a safety charger.

• Tighten the service port cap (nut) of stop valve firmly. The tightening torque is 12 to 16 N·m. (For the prevention of slow-leak)

• Check additional refrigerant charging amount referring to table 4 when liquid pipe is one size larger than standard diameter,

and table 2 when the pipe is standard diameter.

14

100

95

90

85

80

75

70

5 101520253035404550556065707580

Note: The permitted pipe length is up to 55m for RP3 model.

RP3 model

RP4 model

Heating RP3, 4, 5
and 6 models
(Up to 55m for
RP3 model)

RP5 model

RP6 model

Cooling

Capacity ratio [%]

Corrected pipe length

(c) Capacity correction

5 10152025303540455055

80

Capacity ratio [%]

Corrected pipe length

85

90

95

100

Heating RP3

Cooling RP3

Cooling
Heating

Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity
curves below. When the diameter of gas pipe is one size smaller than standard diameter, cooling capacity is lowered com­paring to the standard diameter. The lowered capacity can be obtained by referring to capacity curves for gas pipe which is
one size smaller than standard size.

Corrected pipe length (m) = actual pipe length (m) + number of bends x 0.3 (m)

11

Capacity curves for PUHZ-RP • HA model <Standard size>

22

Capacity curve for PUHZ-RP3 model

<When gas pipe is one size smaller than standard size>

33

When gas pipe is one size larger than standard size for PUHZ-RP4, 5 and 6.

1 Capacity can be obtained by referring to capacity curves of standard size.

15

4-3-2. Synchronized twin and triple

(a) Pipe length

Please note that refrigerant piping length, bend number and height difference of indoor units are specified for each unit
combination.
Note: Be sure to use our Multi-distributor for distributing pipe to use existing piping.

<Table 5>

Synchronized twin

Outdoor

unit

<Table 6>

Outdoor

unit

Note 1: If total piping length exceeds charge-less piping length of 30 m, charge additional refrigerant according to the table 7.

PUHZ-RP3VHA
PUHZ-RP4~6VHA

Synchronized twin

PUHZ-RP6VHA 30 m or less70 m or less

Permitted total piping
length A + B + C

50 m or less
75 m or less

Permitted total piping
length A + B + C + D

Chargeless piping
length A + B + C

30 m or less

Charge-less piping
length A + B + C + D

Indoor unit’s height
difference [B and C]

8 m or less

Indoor unit’s height difference

[B and C] [C and D] [B and D]

8 m or less

Bend number

w 2

15 at most

Bend number

w 2

15 at most

<Table 7>

A + B + C (+D)

Outdoor unit

30 m or less
PUHZ-RP3VHA
PUHZ-RP4~6VHA

Note 2: Bends number (w 2) should be within 8 for each combination, A + B, A +C and A + D, and 15 in all.
Note 3: Height difference between indoor and outdoor unit is referred to no matter which unit is located higher or lower.

<Table 8> Pipe length for twin of RP 3 - 6 (Piping length: A + B + C)

RP3 Twin (RP1.6✕2)

Liquid [6.35

Gas [12.7
Branch pipe
diameter
[B and C]

<Table 9> Pipe length for triple of RP6 (Piping length: A + B + C + D)

Branch pipe
diameter
[B,C and D]

Liquid [6.35
Gas [12.7

Liquid [9.52
Gas [15.88

Liquid [12.7
Gas [19.05

Liquid [6.35
Gas [12.7

Liquid [9.52
Gas [15.88

Liquid [12.7
Gas [19.05

✕

✕

✕

Main pipe diameter [A]

Liquid [9.52

Gas [15.88

75 m(✽2)

50 m

✕

Not required

Liquid [9.52
Gas [15.88

50 m

50 m

Liquid [12.7
Gas [19.05

50 m(✽1)

50 m(✽1)

Additional refrigerant to be charged (kg)

31 - 40 m 41 - 50 m 51 - 60 m 61 - 75 m

0.6

RP4 Twin (RP2✕2) RP5 T win (RP2.5✕2) RP6 Twin (RP3✕2)

Liquid [9.52
Gas [15.88

75 m(✽2)

50 m

✕

✕

✕

✽1 ··· Set DIP SW8-1 on outdoor unit control circuit board to ON.
✽2 ··· When using existing piping, pipe length should be 50 m at most.
✽3 ··· Height difference between indoor and outdoor unit should be

kept within 30 m in every case.
[Marks in table]

··· Normal piping

··· It can be used with some changes of piping length and the
amount of refrigerant to be charged.
✕ ··· It cannot be used.

1.2

Main pipe diameter [A]

Liquid [12.7
Gas [19.05

50 m(✽1)

50 m(✽1)

✕

1.8 2.4

Liquid [9.52
Gas [15.88

✕

75 m(✽2)

✕

Liquid [12.7
Gas [19.05

✕

50 m(✽1)

✕

w Charge additional
refrigerant from
the check valve
connected to the
pipe of low-pressure
side in indoor unit.

Liquid [9.52
Gas [15.88

✕

75 m(✽2)

✕

Liquid [12.7
Gas [19.05

50 m(✽1)

✕

✕

16

Synchronized twin

Synchronized triple

Indoor
unit

Optional
distributing pipe

1 m or less

Multi-distributor

30 m or less

Branch
pipe B

Branch
pipe C

Main
pipe A

Indoor
unit

Outdoor
unit

Indoor
unit

Optional
distributing pipe

1 m or less

Multi-distributor

30 m or less

Branch
pipe B

Branch
pipe C

Branch
pipe D

Main
pipe A

Indoor
unit

Indoor
unit

Outdoor
unit

1. Keep Stop valve in outdoor unit fully closed (as it is shipped), and after completing refrigerant piping connection, conduct air
purge from service port of stop valve at outdoor unit.

2. After air purging, make the valve rod of stop valve at outdoor unit fully open.
Now refrigerating cycle is complete between indoor and outdoor unit.
Handle stop valve following the indication on outdoor unit.

Caution:

• Be sure to apply refrigerating oil to flare sheet face. Never apply it to screws. (As it causes flare nut loosening.)

• Use double spanner for piping connection.

• Be sure to check gas leak by using leak detector or soapy water.

• Use attached parts for refrigerant piping to provide correct insulation to the connection of indoor unit side in accordance with
attached explanation sheet.

• Be sure to provide anoxidized brazing.

(b) Adjusting the amount of refrigerant oil

(i) In case of RP 3 twin

Check the additional refrigerant oil to be charged referring to table 2 when using pipe of size referred in table 8.

(ii) In case of RP4 - 6 twin or RP6 triple

When using liquid pipe one size larger than standard diameter for main pipe A, calculate the amount of additional
refrigerant oil referring to 2 below.

1 When using piping of standard diameter or gas pipe one size larger than standard diameter for main pipe A.

Check the additional refrigerant oil to be charged referring to table 2 like 1:1 system.

2 When using liquid pipe one size larger than standard diameter for main pipe A.

[In case of RP4-6 using liquid pipe of [12.7]

• When total length of extension pipe (main pipe and branch pipe) is less than 20 m.
No adjustment is required for refrigerant oil. (Chargeless)

• When total length of extension pipe (main pipe and branch pipe) is more than 20 m.
Calculate the amount of additional refrigerant oil, referred to as W (g) in the following, using the equation below and add
proper amount of refrigerant oil. If W is less than or equal to 0, no additional charge is required. (Chargeless)

[Additional refrigerant oil] W (g) = {100(g) ✕ L1} + {60(g) ✕ L2} + {30(g) ✕ L3} - 2000(g)

Note: Put “0” in L1-3 if it is not used. L1: Liquid pipe length of [12.7 (m)

L2: Liquid pipe length of [9.52 (m)
L3: Liquid pipe length of [6.35 (m)

(c) Capacity correction

Apply pipe length between indoor and outdoor unit which is the longest of all for the calculation of capacity lowering according
to each pipe length.

17

5

Parts name Check points

Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)

Drain sensor

(Refer to below for a detail.)

(Refer to below for a detail.)

Room temperature
thermistor (TH1)

Pipe temperature
thermistor (TH2)

Condenser/evaporator
temperature thermistor
(TH5)

1
2
3

Normal

4.3k"~9.6k"

Abnormal

Open or short

Abnormal

Open or short

Normal

0.6k"~6.0k"

Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(Surrounding temperature 0:~60:)

-200 20406080

< Thermistor for drain sensor >

Temperature (:)

0

1

2

3

4

5

6

7

8

9

10

Resistance (K")

HOW TO CHECK THE PARTS

5-1. INDOOR UNIT

• Common parts

<Thermistor Characteristic graph>

Thermistor for
lower temperature

Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)

Thermistor R0=15kΩ ±3%
Fixed number of B=3480kΩ ±2%

Rt=15exp { 3480( ) }

1

273+t

0: 15kΩ
10: 9.6kΩ
20: 6.3kΩ
25: 5.2kΩ
30: 4.3kΩ
40: 3.0kΩ

Drain sensor

1

273

< Thermistor for lower temperature >

50

40

30

20

Resistance (K")

10

0

-20 -10 0 10 20 30 40 50
Temperature (:)

Thermistor R0=6.0kΩ ±5%
Fixed number of B=3390kΩ ±2%

Rt=6exp { 3390( ) }

0: 6.0kΩ
10: 3.9kΩ
20: 2.6kΩ
25: 2.2kΩ
30: 1.8kΩ
40: 1.3kΩ

1

273+t

1

273

18

Parts name Check points

Measure the resistance between the terminals using a tester.
(Winding temperature 20:)

Fan motor (MF)

Brown

White

Blue

Red

Orange

Black

Protector
(PEA-RP3,4,5EA)
OPEN :135:
CLOSE:86i15:

(PEA-RP6EA)
OPEN :150:
CLOSE:96i15:

Abnormal

Open or short

White-Black

Black-Blue

Blue-Brown

Brown-Red

Motor terminal

or

Relay connector

Normal

PEA-

RP3EA.TH-A RP4EA.TH-A RP5EA.TH-A RP6EA.TH-A

28.6"

12.5"

4.3"

23.6"

20.6"

8.1"

3.2"

16.0"

15.3"

5.1"

2.7"

14.5"

10.2"

5.2"

3.1"

12.1"

Parts name Check points

Measure the resistance between the terminals using a tester.
(Winding temperature 20:)

Fan motor (MF)

PEAD-RP4,5,6EA

(1)

.UK

PEAD-RP3EA(1).UK

White

Blue

Red

Gray

Black

Protector
OPEN :135:
CLOSE:86i15:

Blue

WhiteRed

Gray

Black

Protector
OPEN :150:
CLOSE:96i15:

Abnormal

Open or short

Gray-Black

(White or Red open)

Blue-Black
Black-Red

(White or Red open)

Gray-Red

(White or Red open)

Motor terminal

or

Relay connector

Normal
PEAD-

RP4EA

(1).UK

RP5EA

(1)

.UK RP6EA

(1)

.UK

24.76"

4.78"

18.99"

36.63"

10.27"

2.11"

20.75"

25.44"

Abnormal

Open or short

Gray-Black

(White or Red open)

Black-Blue

(White or Red open)

Blue-Red

(White or Red open)

Motor terminal

or

Relay connector

Normal

PEAD-RP3EA

(1).UK

43.5"

14.74"

57.5"

PLA-RP3AA PLA-RP4AA PLA-RP5AA PLA-RP6AA
PLA-RP3AA

1 PLA-RP4AA1 PLA-RP5AA1 PLA-RP6AA1

PLA-RP3AA.UK PLA-RP4AA.UK PLA-RP5AA.UK PLA-RP6AA.UK
PLA-RP3AA

Parts name Check points

Vane motor

Fan motor

Relay connector

1

2

3

Protector
OPEN :130:
CLOSE:80i20:

Drain pump

Red

Red

1.UK PLA-RP4AA1.UK PLA-RP5AA1.UK PLA-RP6AA1.UK

Measure the resistance between the terminals using a tester.
(Surrounding temperature20:)

Normal Abnormal

15k" Open or short

Measure the resistance between the terminals using a tester.
(Winding temperature 20:)

Red

White

Black

1
2
3

Motor terminal

or

Relay connector

Red-Black

White-Black

PLA-RP3AA PLA-RP4,5,6AA

87.2"

104.1"

Normal

28.7"

41.6"

Abnormal

Open or short

Measure the resistance between the terminals using a tester.
(Winding temperature 20:)

1
2

Normal Abnormal

290" Open or short

PEA-RP3EA.TH-A PEA-RP4EA.TH-A PEA-RP5EA.TH-A PEA-RP6EA.TH-A

PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK
PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK PEAD-RP6EA1.UK

19

U-V

U-W

W-V

Unit

Compressor model

Winding

Resistance

( " )

ANV33FDAMT

(at 20°C)

0.266

0.266

0.266

TNB220FMBH

0.865 ~ 0.895

0.865 ~ 0.895

0.865 ~ 0.895

PUHZ-RP4,5,6VHA

PUHZ-RP3VHA

5-2. OUTDOOR UNIT

4

6

2

3

1
2
3
4
5
6

5

1

M

Blue

Brown

Yellow

Orange

Red

White

Parts name

Check points

Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)

Disconnect the connector then measure the resistance using a tester.
(

Winding temperature 20

:)

Thermistor (TH3)
<Outdoor pipe>

Thermistor (TH4)
<Discharge>

Thermistor (TH6)
<Outdoor 2-phase pipe>

Thermistor (TH7)
<Outdoor>

Thermistor (TH8)
<Heat sink>

Normal

160k"~410k"

4.3k"~9.6k"

39k"~105k"

TH4
TH3
TH6
TH7
TH8

Abnormal

Open or short

Normal

(1) - (6)

Red - White

(1) - (4)

Red - Orange

(2) - (5)

Brown - Yellow

(2) - (3)

Brown - Blue

Abnormal

46±4"

Measure the resistance between the terminals using a tester.
(Surrounding temperature 20

:

)

Solenoid valve coil
<Four-way valve>
(21S4)

Pin number of relay
connector is different
from that motor
connector

Motor for compressor
(MC)

Linear expansion valve
( LEV(A),LEV(B) )

Normal

Abnormal

Open or short

PUHZ-RP3VHA PUHZ-RP4, 5, 6VHA

Open or short

Measure the resistance between the terminals using a tester.
(Surrounding temperature 20

:

)

Normal

1197±10"

Abnormal

Open or short

Solenoid valve coil
<Bypass valve>
(SV)

Measure the resistance between the terminals using a tester.
(Winding temperature 20:)

Fan motor(MF1,MF2)

Normal

15.1±0.5"

2350±170" 1370±100"

PUHZ-RP3VHA PUHZ-RP4, 5, 6VHA

0.865"~0.895" 0.266"

Measure the resistance between the terminals using a tester.
(Winding temperature 20

:

)

Normal

Abnormal

Open or short

Relay connector

Abnormal

Open or short

Red — Black
Black — White
White — Red

Red

W

V
U

W

V

U

White
Black

PUHZ-RP3VHA PUHZ-RP4VHA PUHZ-RP5VHA PUHZ-RP6VHA
PUHZ-RP3VHA-A PUHZ-RP4VHA-A PUHZ-RP5VHA-A PUHZ-RP6VHA-A

5-3. COMPRESSOR TECHNICAL DATA

20

HOW TO CHECK THE COMPONENTS

0

10

20

30

40

50

-20 -10 0 10 20 30 40 50
Temperature (:)

Resistance (K")

200

150

100

50

0

25 50 75 100 125

Temperature (:)

Resistance (K")

500

400

300

200

100

0

25

50 75 100 120

Temperature (:)

Resistance (K")

<Thermistor feature chart>

Low temperature thermistors

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Outdoor 2-phase pipe> (TH6)

• Thermistor <Outdoor> (TH7)
Thermistor R0 = 15k' ±3%

B constant = 3480k' ±2%

1

R

t =15exp{3480(

0: 15k'
10: 9.6k'
20: 6.3k'
25: 5.2k'

Medium temperature thermistor

• Thermistor <Heat sink> (TH8)

1

273+t – 273

30: 4.3k'
40: 3.0k'

)}

Thermistor R50 = 17k' ±2%
B constant = 4150k' ±3%

1

t =17exp{4150(

R

1

273+t – 323

)}

0: 180k'
25: 50k'
50: 17k'
70: 8k'
90: 4k'

High temperature thermistor

• Thermistor <Discharge> (TH4)
Thermistor R120 = 7.465k' ±2%

B constant = 4057k' ±2%

1

t =7.465exp{4057(

R
20: 250k'

30: 160k'
40: 104k'
50: 70k'
60: 48k'

1

273+t – 393

70: 34k'
80: 24k'
90: 17.5k'
100: 13.0k'
110: 9.8k'

)}

21

A

B

C

Open

Extra tightning (about 32 pulse)

Pulse number

500 pulse
Opening a valve
all the way

Close

Valve position (capacity)

LEV

M

1

6

[4

[4

[3

[2

[1

2

1

Red

Brown

Blue

Orange

Yellow

White

3

4

5

6

Connector LEV-A

LEV-B

DC12V

Outdoor controller board

Drive circuit

[3

[2

[1

3

2

5

4

Linear expansion valve

1

ON
OFF
OFF
OFF

ON

ON
OFF
OFF

OFF

ON
OFF
OFF

OFF

ON
ON

OFF

[1

Output

(Phase)

Output

[2
[3

[4

234

5678

OFF
OFF

ON

OFF

OFF
OFF

ON
ON

OFF
OFF
OFF

ON

ON
OFF
OFF

ON

(1) Operation summary of the linear expansion valve.

• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the outdoor controller board.

• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the outdoor controller board and the linear expansion valve>

<Output pulse signal and the valve operation>

(2) Linear expansion valve operation

Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8
Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1

The output pulse shifts in above order.
❈ 1. When linear expansion valve operation stops, all output phase

become OFF.

❈ When the switch is turned on, 700 pulse closing valve signal will

be sent till it goes to

A point in order to define the valve position.

(The pulse signal is being sent for about 20 seconds.)
When the valve moves smoothly, there is no noise or vibration

occurring from the linear expansion valve : however, when the
pulse number moves from B to A or when the valve is locked,
more noise can be heard than normal situation.
No noise is heard when the pulse number moves from B to A in
case coil is burn out or motor is locked by open-phase.

❈ Noise can be detected by placing the ear against the screw dri-

ver handle while putting the screw driver to the linear expansion
valve.

22

(3) How to attach and detach the coil of linear expansion valve

<Composition>
Linear expansion valve is separable into the main body and the coil as shown in the diagram below.

Coil

Lead wire

<How to detach the coil>

Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and detach the coil by pulling it
upward.
Be sure to detach the coil holding main body firmly. Otherwise
pipes can bend due to pressure.

Stopper

Main body

<How to attach the coil>

Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and attach the coil by inserting it
downward into the main body. Then securely attach the coil stop­per to pipe B. (At this time, be careful that stress is not added to
lead wire and main body is not wound by lead wire.) If the stop­per is not firmly attached to pipe B, coil may be detached from
the main body and that can cause defective operation of linear
expansion valve.
To prevent piping stress, be sure to attach the coil holding the
main body of linear expansion valve firmly. Otherwise pipe may
break.

B

A

A

Be sure to attach the
stopper to pipe B.

23

6 MICROPROCESSOR CONTROL

Standard 1:1 Synchronized twin. Triple

1Unit (indoor/outdoor) power supply L/N
2Connecting line between the indoor and

outdoor; S1/S2/S3, Polarized 3-wire

3Remote controller transmission line; Non

polarezed 2-wire

4Auxiliary heater exclusive power supply; L/N

1Unit (indoor/outdoor) power supply L/N
2Connecting line between the indoor and outdoor; S1/S2/S3, Polarized 3-wire
3Remote controller transmission line; Non polarezed 2-wire
4Auxiliary heater exclusive power supply; L/N

1Unit (indoor/outdoor) power supply L/N
2Connecting line between the indoor and

outdoor; S1/S2/S3, Polarized 3-wire

3Remote controller transmission line; Non

polarezed 2-wire

4Auxiliary heater exclusive power supply; L/N

Remote control main/sub setting necessity
(In case of 2 remote controllers)

No setting (initial setting)
Refrigerant address setting; SW1; 3~6

Various setting

Remote controller

Main Sub

Indoor unit

Outdoor unit

Remarks

Group control

1

4

2

3

Main

(00)

Outdoor unit; (00)...Refrigerant address

(SW1; 3~6)

Indoor unit; (00)–w

Indoor unit number
(auto setting)

Refrigerant address
(receiving from the
outdoor unit)

Outdoor unit; (00)...Refrigerant address

(SW1; 3~6)

Indoor unit; (00)–w

Indoor unit number
(auto setting)

Refrigerant address
(receiving from the
outdoor unit)

(00)-1 (00)-2 (00)-3

Sub

1

44

222

4

3

Main

(00)

(00)-1 (00)-2 (01)-1

1

(01)

1

(02)

1

44

222

4

(02)-1 (02)-2

4

2

2

4

3

333

(1) Indoor unit number is set automatically
(2) When the refrigerant address of the unit is "00", Remote controller is supplied.

Remote control main/sub setting necessity
(In case of 2 remote controllers)

No setting
No setting

Remote control main/sub setting necessity
(In case of 2 remote controllers)

No setting (initial setting)
No setting (initial setting)

Various setting

Remote controller

System construction

System construction

Indoor unit

Outdoor unit

Remarks (1) Indoor unit number is set automatically

6-1. System construction

(1) System construction
A-control model which just wires the connecting line between the indoor and outdoor unit and supply the power is applicable to
any models of standard (1:1), twin and triple. (Refer to 2 Start-up system.)

24

(2) The transmitting specification for “A” control

Cross section

of cable

Round

2.5

2.5

1.5

2.5

3

3

4

4

(50)

✽2

(45)

✽3

60
✽4

Not

applicable

✽5

Flat

✽1 : Power supply cords of appliances shall not be lighter than design 245 IEC or 227 IEC.
✽2 : In case that cable with stripe of yellow and green is available.
✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm

2

.

✽4 : In case of regular polarity connection (S1-S2-S3).
✽5 : In the flat cables are connected as this picture, they can be used up to 80m.

✽6 : Mentioned cable length is just a reference value.

It may be different depending on the condition of installation, Humidity or materials, etc.

Flat

Round

Wire size

(mm

2

)

Number

of wires

Clockwise : S1-S2-S3
w Pay attention to stripe of yellow and green

Clockwise : S1-S2-S3-Open
w Connect S1 and S3 to the opposite angle

Not applicable
(Because center wire has no cover finish)

From left to right : S1-Open-S2-S3

Polarity

L(m)

✽6

(3C Flat cable ✕ 2)

S1 S2 S3

1Wiring regulations

Section Communications from remote controllers

The maximum length of

500m 80m (Including the wiring among indoor units

total wiring

The maximum numbers
for connection

One remote controller can connect and operate
up to 16 indoor units by grouping them.
One group can connect up to two remote controllers.
❋1 Remote controller considers multiplex units as

a single group.

Communications between indoor and outdoor units

in addition to the wiring between indoor and
outdoor units)

1

❋

One outdoor unit can connect up to three
indoor units.

The cables applicable 0.3mm

2

to 1.25mm

2

Use either flat-type cable (3 cores: {1.6mm or
more) or wires in the table below.
❋2 The diameter of the cables depends on

each unit.

Others The wirings as follows are not allowed:

• The wiring that the indoor units of the same

The core wire connected to terminal S2 shall be
placed at the center of flat-type cable.

refrigerant system are connected through TB5.

• The wiring which directly connects the terminals
for remote controllers.

2Transmitting specification

Section Communications from remote controllers

Communications between indoor and outdoor units
Transmitting speed 83.3 bit/sec. (1 bit = 12ms) 83.3 bit/sec. (1 bit = 12ms)
Normal transmission The terminal for remote controller transmits sig-

nals every 7.5 seconds; the indoor unit whose

Outdoor unit transmits signals every 3 seconds;
all the connected indoor units respond them.

refrigerant address is “0” responds them.
Modulation The waveform modulates at 50kHz. There is no modulation.
Detection of abnormal

communication

When transmitting error is detected for three con-

secutive minutes.

When transmitting error is detected for three
consecutive minute.

WIRING SPECIFICATIONS FOR 220~240V 50Hz
(INDOOR-OUTDOOR CONNECTING CABLE)

25

(3) The waveforms of from remote controller communications

The following graphs are the examples for measuring waveforms on the wirings of remote controlled transmission at the
terminal block for remote controller.

a) Ameasuring example in the sequence of startup b) Ameasuring example during normal stop

Transmission
from
remote
controller

Transmission
from
indoor unit

7.5
seconds

Transmission
from
remote
controller

Transmission
from
indoor unit

7.5
seconds

5V/div, 1sec/div: 5V/div, 1sec/div:

c) Expanded waveform 1 (signal 111000....) d) Expanded waveform 2 (50Hz carrier)

5V/div, 10msec/div: 5V/div, 2µsec/div:

• During normal operation, the remote controller interactively exchanges signals with the indoor unit of refrigerant address “0”.
When the remote controller cannot receive signals from the indoor unit of refrigerant address “0” for 3 minutes, it is considered
as abnormal. E0 is displayed on the remote controller as an error.

26

(4) The waveforms of communications between indoor and outdoor units

The following graphs are the examples for measuring waveforms on the wirings of connecting indoor and outdoor units at
between S2 and S3 of the outdoor terminal block TB1.

a) Ameasuring example the sequence of startup: 1 b) A measuring example in the sequence of startup: 2

Transmission
from
indoor unit

Transmission
from
outdoor unit

10V/div, 500msec/div: 10V/div, 500msec/div:

c) Ameasuring example during normal stop

(When one outdoor unit connects one indoor unit)

Transmission
from
indoor unit

Transmission
from
outdoor unit

Transmission
from
indoor unit

Transmission
from
outdoor unit

d) Ameasuring example during normal stop

(When one outdoor unit connects two indoor units)

Transmission
from
indoor unit

Transmission
from
one indoor unit

Transmission
from
another
indoor unit

10V/div, 500msec/div: 10V/div, 500msec/div:

c) Expanded waveform

10V/div, 50msec/div:

• During normal operation, outdoor unit interactively exchanges signals with all the connected indoor units.

• When outdoor unit cannot receive signals for three minutes from an indoor unit due to any trouble like cable disconnection, it
is considered as abnormal and the outdoor unit stops. E8 is displayed on the remote controller. This is to avoid independent
operation of indoor units.

27

(5) Start-up system

Power ON

YES

NO

1 Refrigerant address

transmitting

Power supply control

to remote controller

3 Set number of the

connected unit

4 Set number of the

indoor unit

6 Collecting the unit

information

7 Collecting the

operation data

Set up finish

2 Refrigerant

address "0"?

YES

NO

5 Duplication

detection

Example

2 blinking 2 blinkingNot lighted

3 seconds

A control unit is applicable to any models of standard (1:1), twin and triple without switch setting according to carrying out the
below process automatically when the power is supplied.
When the power is supplied, following processes of 1 Refrigerant address transmitting, 2 Power supply control to remote
controller, 3 Set number of the connected unit, 4 Set number of the indoor unit, 5 Duplication detection, 6 Collecting the unit
information and 7 Collecting the operation data are carried out as shown on the figure.
Also when detecting the duplicated setting in the step 5, back to the first step and reset it.

; Transmitting the switch setting

contents on the outdoor unit
remote controller
(SW1-3~6)

; Feeding control to remote

controller
Feeding the indoor unit of the
refrigerant address “0”

EA error if 4 minutes have
passed since the power is
supplied.

; If there are 2 or more speci-

fied indoor unit, back to the
first step.

<<Feature>>
A. Start-up time from the second time will be shorter since setting of the number of connected units is memorized once set.

Start-up time can be estimated as following;

•When installing ... 1~2 minutes (Depending the number of connecting units)

•Since the second time .... 20 seconds ~ 1 minute (Depending the number of connecting units)

w When the above processing does not finish, even if 4 minutes have passed, consider the processing an error and

Ea, Eb or Ec will be displayed.
However if power is not supplied to the indoor unit due to miss-wiring or looseness of the connecting lines
between the indoor and outdoor unit, there will be no display on the remote controller. Also when the data can not
be received from the outdoor unit, E6 is displayed on the remote controller after 6 minutes.

B. When replacing the p.c.board, only the unit number which has had it`s p.c.board replaced is reset.

Even if the power supply is reset, the unit number which has not had it`s replaced does not change.

C. Automatic set unit is possible to confirm by blinking the frequency of LED3 in the indoor controller board.

At intervals of approx. 3 seconds, the number of the unit-number blinks.(Example:The unit(unit number:2) blinks twice at
3-second intervals.

; Collecting the vane, louver

information and transmittance
to the remote controller.

; Collecting the preceding oper-

ation setting information and
transmittance to the remote
controller.

EB error if 4 minutes have
passed since the power is
supplied.

EC error if 4 minutes have
passed since the power is
supplied.

28

Function/control specifications

Item

Fan

Up/down
auto vane

Left/right

Function / specification

swing louver

Drain pump

Number of fan speed
Drive method

Provided
Swing function
Shutter mechanism
Moter type

Provided
Moter type

4-way ceiling cassette

PLA-RP•AA

4

Pulsation

(AC motor)

Stepping

(12V DC)

—
—

Ceiling concealed

PEA-RP•EA

2

Tap-changing

(AC motor)

—
—
—

—

—
—

—

Note: The parts marked are optional.

PEAD-RP•EA

2

Tap-changing

(AC motor)

—
—
—

—

—
—

29

7

Control modes

Control details

1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)

• Room temperature ] desired temperature +1:···Compressor ON

• Room temperature [ desired temperature ···Compressor OFF
Crankcase heater: OFF when compressor operates

ON when compressor stopped

(including when thermo is OFF)
Crankcase heater switches ON when 220-240V AC current is applied between
connectors CH 1 and 2 on the outdoor control board.

1-2. Anti-freezing control
Detected condition : When the liquid pipe temperature (TH2 ) or Condenser/
Evaporator temperature (TH5 ) (w3) is 2: or less (w4) in 16

minutes from compressors start up, anti-freezing control
starts and the compressor will be suspended.

Released condition : The timer which prevents reactivating is set for 3 minutes,
and anti- freezing control is cancelled when any one of the
following conditions is satisfied.

1

Liquid pipe temperature (TH2) and Condenser / Evaporator
temperature (TH5) turn 10: or above.

2 The condition of the compressor stop has become

complete by thermoregulating, etc.

3 The operation modes became mode other than COOL.
4 The operation stopped.

1-3. Frozen protection
Detected condition : 1 When the indoor pipe temperature (TH2 ) or Condenser/

Evaporator temperature (TH5 ) continues -15: for 3 minutes
since 3 minutes has passed after the compressor start, the
compressor stops and then the mode changes to prevent
restarting for 6 minutes. After restarting of 6 minutes, when
the indoor pipe temp. (TH2) or Condenser / Evaporator
temperature (TH5) continues -15 or less for three minutes again
by the time 16 minutes have passed, the frozen protection
operates. (P6)

Detected condition : 2

In case the indoor unit continues to be under the anti-freezing
control for 9 minutes or more, the unit will be in a state of the
suspensive abnormality. Restart the compressor after releasing

the anti-freezing control. The suspensive abnormality will be
cancelled if the compressor keeps operating for 20 minutes.
However, the suspensive abnormality will turn into the
abnormality if the anti-freezing control works again for 9

minutes during that period. On the other hand, the suspensive
abnormality will be cancelled if the anti-freezing control
works for less than 9 minutes

Released condition : When the operation stops by the remote controller operation.

By the remote controller setting (switch of 4 speeds or 2 speeds)
When determining the abnormality of the pipe temp. low speed fan is fixed.

2. Fan

1. Compressor

Remarks

Type

Fan speed notch

[Low] [Mid2] [Mid1] [High]

[Low] [High]

4 speeds type
2 speeds type

Refer to w2.
Refer to w3.

w1 The thermoregulating
function is provided in the
outdoor unit.

The indoor unit transmits
the indoor room
temperature and set
temperature data to
outdoor unit, then the
outdoor unit controls
thermoregulation.

INDOOR UNIT CONTROL

7-1. COOL operation

w2 Compare liquid pipe temperature to Condenser/ Evaporator temperature, and the lower one is applied to anti-freezing control.

• Liquid pipe temperature [ Condenser/ Evaporator temperature····· Liquid pipe

• Liquid pipe temperature > Condenser/ Evaporator temperature····· Condenser/ Evaporator pipe
w3 The function of remote controller can change the temperature to start anti-freezing control.

30

→

3

2

1

→

3

2

1

→

Control modes

Control details

3-1. Drain pump control

•Always drain pump ON during the COOL and DRY mode operation.
(Regardless of the compressor ON/ OFF)

•When the operation mode has changed from the COOL or DRY to the others
(including Stop), OFF the control after the drain pump ON for 3 minutes.

Drain sensor function

• Energize drain sensor at a fixed voltage for a fixed duration. After energizing,
compare the drain sensor’s temperature to the one before energizing, and judge
whether the sensor is in the air or in the water.

Basic control system

• While drain pump is turned on, repeat the following control system and judge
whether the sensor is in the air or in the water.

•Drain sensor temperature rise (∆t)

•Temperature of drain sensor before current is applied (T0)

•Temperature of drain sensor after current is applied (T

1)

[ ∆t = T1 – T0 ]

(1)Initial setting : Start at COOL mode and horizontal vane.
(2)Vane position : Horizontal →Downward A →Downward B →Downward C→Swing

(3)Restriction of the downward vane setting

When setting the downward vane A, B and C in [Mid2] or [Low] of the fan speed
notch, the vane changes to horizontal position after 1 hour have passed.

4. Vane
(up/ down vane change)

3. Drain pump

Remarks

✻1 Drain sensor
Indoor control
board
CN31

✻2 If the unit is
without the
drain sensor,
install the
jumper
connector.
Indoor control
board
CN31

When installing
the jumper
connector,
determine to
detect
compulsorily in
the air.

✻1 Whether the
unit has a swing
function is listed
in the function/
control specifications.

✻2 See the
function/control
specifications
for the vane
motor type.

✻3 "1Hr"
appears on the
wired remote
controller.

Timing of
energizing
drain sensor

ON

OFF

Stand by for
a minute

30 sec.

Detect the
temperature
before
energizing
(T0)

Detect the
temperature
after
energizing
(T1)

Judge whether
the sensor is in
the air or in the
water.

30 sec.Stand by for

a minute

·······Repeat

31

7-2. DRY operation

Control modes

Control details

1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)
Setting the compressor operation time by the thermoregulating signal

and the room temperature (TH1).
Thermoregulating signal ON Room temperature ] desired temperature +1:
Thermoregulating signal OFF Room temperature [ desired temperature

1-2. Frozen prevention control

No control function

Indoor fan operation controlled depends on the compressor conditions.

3. Drain pump

1. Compressor

Remarks

✻1
The thermoregulating
function is provided in
the outdoor unit.

The indoor unit
transmits the indoor
room temperature and
set temperature data to
outdoor unit, then the
outdoor unit controls
thermoregulation.

Room temp.

Thermoregulating

signal

Operating

time (min)

OFF time

(min)

Less than 18:

Over 18:

ON 9 3

OFF

10

3

Compressor operation stop

1-3. Frozen protection

Same control as COOL operation

2. Fan

Note: Remote controller setting is not acceptable.

Compressor

Fan speed

ON

OFF

[Low]

Stop (

✻1)

✻1 Note that even when

the compressor is OFF, the
unit starts operating in
[LOW] if the start condition
below is met.
Start condition: The piping
temperature (fluid piping or
2-phase piping) has fallen
to 1

: or less.

Release condition: The
piping temperature (fluid
piping or 2-phase piping)
has returned to at least
10

:.

4. Vane
(up/ down vane change)

Same control as COOL operation

Same control as COOL operation

5. Louver
(Left/ right change)

Remote controller setting

✻1 Model which is

installed louver
function.

Control modes

Control details

None (always stopped)

Set by remote controller.

3. Drain pump

1. Compressor

Remarks

2. Fan

Number of fan speeds

Fan speed notches

4

2

[Low], [Mid2], [Mid1], [High]
[Low]

[High]

4. Vane
(up/ down vane change)

3.1 Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
1 ON for 3 minutes after the operation mode is switched from COOL or DRY to

another operation mode (FAN).

2 ON for 6 minutes after the drain sensor is determined to be submerged using the

liquid level detection method given below.

3 ON for 6 minutes after indoor piping (liquid piping) temperature - indoor intake

temperature [ -10:, AND the drain sensor input is at the short or open level.
(If condition 2 or 3 is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for a further 6 minutes.)

3.2 Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor. This process is performed if any of the following conditions is met:

1 Drain pump is ON.
2 Indoor piping (liquid piping) temperature - indoor intake temperature [ -10:
3 Indoor piping (liquid piping) temperature or indoor intake temperature is at the

short or open level temperature.
4 Every hour after the drain pump has been switched from ON to OFF.

Same as the control performed during the COOL operation, but with no restriction
on the vane's downward blow setting.

7-3. FAN operation

32

7-4. HEAT operation

Control modes

Control details

1-1. Thermoregulating function (Function to prevent restarting for

3 minutes)

• Room temperature [ desired temperature-1: ···Compressor ON

• Room temperature ] desired temperature ···Compressor OFF

1-2. Over- rise protection control

Detected control : When Condenser/ Evaporator temp.
turns 74: or more, less than 90: after starting
compressor, stop the compressor, then the mode changes to
restarting compressor, stop the compressor, then the mode
changes to restarting protection mode after 6 minutes.
After restarting after 6 minutes when the Condenser/
Evaporator temperature became 74: or more, less than 90:
by the time 10 minutes pass, the mode changes to over-rise
protection control.
Release control : When the operation stops by the remote
controller.

1. Compressor

Remarks

✻1
The thermoregulating function is
provided in the outdoor unit.

The indoor unit transmits the indoor
room temperature and set temperature
data to outdoor unit, then the outdoor
unit controls thermoregulation.

2-1. Thermoregulating function

When the mode is not Hot adjust or Defrosting mode during
HEAT compressor operation, the controller changes to
auxiliary heater ON.
Thermoregulating function follows the below table with
according to desired temp. and room temp.

2.

Auxiliary heater

Temperature difference

Keeping condition

Auxiliary heater

z < 0

0 [ z < 3

OFF

3 [ z

ON

✻2 During the over-rise prevention

control, "Airflow increasing" in the
indoor fan is controlled.
( Only the model of fan 4-speed)

✻1 Models without auxiliary heater also
control the units in the same way as
shown in the left.

temperature difference Z=Desired temperature - Room temperature
2-2. Over-rise prevention control

During the HEAT compressor operation, when the Condenser/
Evaporator temperature becames 63: or more, over-rise
prevention control operates and the auxiliary heater prohibits
for ON operation. When the indoor Condenser/Evaporator
temperature is being 58: or less for 3minutes during
over-rise prevention, over-rise prevention control will be
released and auxiliary heater ON will be allowed.
(However, in case the Condenser/Evaporator temperature
becomes 66: or more during over-rise prevention, 40: or
less will be the requirement to release over-rise prevention
control and allow auxiliary heater to be ON.)

33

Control modes

3. Fan

Control details

Controlled by the remote controller (4-speed or 2-speed)
Give priority to under-mentioned controlled mode
3-1. Hot adjuster mode
3-2. Preheating exclusion mode
3-3. Thermo OFF mode (When the compressor off by the

thermoregulating)
3-4. Cool air prevention mode (Defrosting mode)
3-5. Capacity increasing mode

3-1. Hot adjuster mode

The fan controller becomes the hot adjuster mode for the
following conditions.

1 When starting the HEAT operation
2 When starting the compressor by the thermoregulating
3 When release the HEAT defrosting operation

Hot adjuster mode ✻1

Set fan speed by the remote controller

[Low]

[Extra Low]

Remarks

✻1
Fan speed change notch
Refer to the model function table

✻1 "STAND BY" will be displayed

during the hot adjuster mode.

A

CB

A: HOT adjuster mode start
B: 5 min have passed since the condition A or the indoor

Condenser/ Evaporator temperature turned 35: or more

C: 2 min have passed since the condition A

(Terminating the hot adjuster mode)

3-2. Preheating exclusion mode

When the condition changes the auxiliary heater ON to OFF
(thermoregulating or operation stop, etc), the indoor fan
operates in [Low] mode for 1 minute.

3-3. Thermo OFF mode

When the compressor stops by the thermoregulating, etc., the
indoor fan operates in [Extra low].

3-4. Cool air prevention mode (Heat defrosting mode)
After "not adjustment" mode is finished, the indoor fan will
stop if 1 or 2 mentioned below is detected.

When receiving "DEFROST" from the outdoor unit, the mode
changes to defrosting mode.

Pipe temp. (Condenser/ Evaporator) - Room temp. [ -5deg

-5deg < pipe temp. (Condenser/ Evaporator) - Room temp. [ 5deg
5deg < pipe temp. (Condenser/ Evaporator) - Room temp.

3-5. Fan speed up mode

•When the control changes to over-rise prevention.
The condition of over-rise prevention (Prohibit for auxiliary
heater ON) continues for 10 seconds or more and the set fan
speed is [Low] or [Mid2], the fan speed changes to [Mid1].

•When the control changes to over-rise prevention during the
heater OFF, the mode changes to capacity increasing mode
immediately.
The capacity increasing mode is canceled by canceling the
over-rise prevention mode.

✻1 This control is same for the model

without auxiliary heater.

✻1 Fan's airflow volume, when thermostat

is OFF, can be changed by selecting the
function of remote controller.

✻1 "DEFROST "will be displayed on the

remote controller during the defrost
operation.

···

1

···

2

···

3

✻1 This control is applied for only 4-

speed model.

34

Control modes

Control details

4-1. Drain pump control
The drain pump turns ON for the specified amount of time when

any of the following conditions is met (regardless of whether
the compressor is ON or OFF).

Ö1 ON for 3 minutes after the operation mode is switched from

COOL or DRY to another operation mode (HEAT mode).

Ö2 ON for 6 minutes after the drain sensor is determined to be

submerged using the liquid level detection method given
below.

Ö3 ON for 6 minutes after indoor liquid pipe temperature -

indoor intake temperature becomes -10deg or less AND the
drain sensor input is at the short or open level.
(If condition 2 or 3 is still being met after the drain pump has
been turned ON for 6 minutes, the drain pump is kept ON for
a further 6 minutes.)

4-2. Liquid level detection method
The liquid level is detected by determining whether or not the

drain sensor is submerged, based on the amount of the
temperature rise after the sensor is self-heated. This process
is performed if any of the following conditions is met.

Ö1 Drain pump is ON.
Ö2 Indoor liquid pipe temperature - indoor intake temperature

[ -10deg (except during defrosting)

Ö3 Indoor liquid pipe temperature or indoor intake temperature is

at the short or open level temperature.

Ö4 Every hour after the drain pump has been switched from ON

to OFF.

w Refer to “7-1. COOL opration” for

liquid level detection method.

(1) Initial setting : OFF → HEAT···[last setting]

When changing the mode from exception of HEAT
to HEAT operation. ···[Downward C]

(2) Air flow direction

[Horizontal]→[Downward A]→Downward B]→Downward C]→[Swing]

(3) Determining position (When the timing motor of AC 200-240V)

Control each air outlet angle considering the starting OFF →
ON of limit switch to be a standard position (Horizontal or
shutter).
When the standard position can not be determined for 10

minutes, the vane stops at the arbitrary position.
(Vane swing motion for 10 minutes)
(4) Restriction of vane position

The vane is horizontally fixed for the following modes.

(The control by the remote controller is temporally invalidated

and control by the unit.)

•Compressor OFF mode (Thermoregulating, etc.)

•Hot adjuster [Extra low] mode

•Cool prevention mode (Determining except for Heat area)

•Heat defrost mode

•Piping (Condenser/ Evaporator) temperature is 37: or less.

4. Drain pump

Remarks

5. Vane control
(Up/ down vane
change)

✻1 Whether the unit has a swing

function is listed in the
function/control specifications.

✻ See the function/control

specifications for the vane motor
type.

35

7-5. AUTO operation

Control modes

1. Initial value of
operation mode

2. Mode change

3. COOL mode

4. HEAT mode

HEAT mode for room temperature < Desired temperature
COOL mode for room temperature ] Desired temperature

(1) HEAT mode → COOL mode

Room temperature ] Desired temperature + 2deg. or 15 min. has passed

(2) COOL mode → HEAT mode

Room temperature [ Desired temperature - 2deg. or 15 min. has passed
Same control as cool operation
Same control as heat operation

Control details

7-6. When unit is stopped Control mode

Control modes

1. Drain pump

1.1 Drain pump control
The drain pump turns ON for the specified amount of time when
any of the following conditions is met (regardless of whether the
compressor is ON or OFF)

1 ON for 3 minutes after the operation mode is switched from COOL

or DRY to another operation mode (HEAT mode).

2 ON for 6 minutes after the drain sensor is determined to be

submerged using the liquid level detection method given below.

3 ON for 6 minutes after indoor piping (liquid piping) temperature

- indoor intake temperature [ -10deg, AND the drain sensor input is

at the short or open level.
(If condition 2 or 3 is still being met after the drain pump has
been turned ON for 6 minutes, the drain pump is kept ON for a
further 6 minutes.)

1.2 Liquid level detection method
The liquid level is detected by determining whether or not the drain
sensor is submerged, based on the amount the temperature rises
after self-heating the sensor. This process is performed if any of the
following conditions is met:

1 Drain pump is ON.

Indoor piping (liquid piping) temperature - indoor intake temperature [ -10deg

2

(except during defrosting)

3 Indoor piping (liquid piping) temperature or indoor intake temperature

is at the short or open level temperature.

4 Every hour after the drain pump has been switched from ON to OFF.

Control details

Remarks

This mode is provide in the outdoor unit.

✻

The indoor unit follows the instruction
from the outdoor unit.

✻

This mode is provide in the outdoor unit.
The indoor unit follows the instruction
from the outdoor unit.

Remarks

36

7-7. TIMER operation

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

C

D

3

21

ABc

Available Timer-Interlocked Operation Modes

1. AUTO START/STOP:Allows both start and shutdown to be interlocked
with the timer.

2. AUTO START: Allows automatic start in response to the timer setting
and shutdown to be proceeded by manually pressing the ON/OFF but­ton.

3. AUTO STOP: Allows the start of the operation to be manually invoked
by pressing the ON/OFF button and automatic shutdown based on the
timer setting.

Timer-interlocked operation is available only once for both start
and shutdown in 24 hours.
While D w is displayed, setting and changing of time for timer-

interlocked operation is disabled.

In this case, press 3 button once to turn off the D w display on

the remote controller. This is referred to as TIMER OFF operation.

1) Set the current time

1-1) Press the 1 button and “CLOCK” A will be displayed.
1-2) Press the 2 button once to advance the current time by one.

Press the 2 button once to set back the current time by one.

• Press and hold down either button to fast-forward (-reverse) the time
setting.

• The display will disappear from about 10 seconds after the setting
has been entered.

2) Set the time to start the unit as follows

2-1) Press the 1 button and B will be displayed.

ON

2-2) Press the 2 button to set the current time.
2-3) The --:-- field C will be displayed.

The --:-- field C will display a range of time between 23:50 and 00:00.

2-4) Press the 3 button and D will be displayed.

3) Set time to stop the unit as follows

3-1) Press the 1 button and C will be displayed.

OFF

3-2) Press the 2 button to set the current time.
3-3) Set the automatic shutdown timer in the --:-- B display.
3-4) Press the 3 button and D will be displayed.

4) Changing the set times

• Enter a start time/shutdown time.

• Press the 3 button and D will be displayed.

5) Cancelling the set times

• Press the 3 button to clear the remote controller`s display.

Note:

When the air conditioner is operated or is turned off after the timer
setting has finished, the unit will automatically run without interrup­tion the next time it is operated.

37

8 OUTDOOR UNIT CONTROL

1. Compressor

Control modes RemarksControl details

1-2. Normal control

Compressor operating frequency is controlled according to the difference
between intake temperature and set temperature in order to let the intake
temperature be the same as the set temperature

• Control timing: Once per minute after 3 minutes have passed since the
compressor started.

• Frequency changing range: -12Hz to +20Hz
w: However, in the following cases, the frequency changing amount, which is

different from the normal one, will be applied to control the operating frequency.
(1) Frequency is fixed to the minimum just before the compressor is stopped
by the thermoregulating function.

Intake temperature [ Set temperature +0.5: ··· Fixed to the minimum frequency.

Intake temperature [ Set temperature +1.0: ··· Fixation is released. (Returned to normal control.)
(2) Correction of the frequency changing amount according to the estimated
discharge temperature If the estimated discharge temperature is more than
113:, the frequency changing amount will be corrected.

• Correction amount: 0Hz to -6Hz

1-3. Start-up control

Controls, which are conducted in 3 minutes after the compressor gets started,
are categorized as below.
(1) In case of start-up (first time)
a. 0 min. to 1 min. after start-up: Fixed to 48Hz.
b. 1 min. to 3 min. after start-up: Fixed to the Hz which has been regulated

according to the temp. difference between intake temp. and set temperature

• Fixed frequency: minimum Hz to 48Hz.
(2) In case of restart
a. 0 min. to 1 min. after start-up: Fixed to minimum Hz.
b.

1 min. to 3 min. after start-up: Fixed to the Hz which has been regulated according

to the temperature difference between intake temp. and set temperature

• Fixed frequency: minimum Hz or 42Hz.
Maximum Hz will be controlled to 70Hz for 10 minutes after the start-up of compressor.

1-4. Indoor anti-freezing control

When the outdoor unit receives the signal of anti-freezing control mode, the
compressor stops. The compressor will restart when the indoor anti-freezing
control is released.

Refer to
“INDOOR UNIT
CONTROL” for
the indoor
anti-freezing
control.

1-5. Indoor frozen prevention control

Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the indoor liquid pipe temp. (TH2) or indoor cond./eva. temp. (TH5).
Temp. restriction: No more Hz-up ··· When TH2 or TH5 detects 4.5

:

or less

Hz-down ··· When TH2 or TH5 detects 3.5

:

or less W

W Hz-down amount: -5Hz per minute

Refer to “8-7.
Inverter control”
for “Inverter
control basic
control freqency
setting”.

1-1. Thermoregulating function

The outdoor unit receives information of set temperature and intake
temperature from the indoor unit through transmission and judges the
necessity of thermoregulating from their temperature difference.
(Refer to “INDOOR UNIT CONTROL” for detailed detecting method.)

8-1. COOL operation

38

Continued to the next page.

From the previous page.

Control modes RemarksControl details

1. Compressor

1-6. Discharge temperature over-rise prevention control

Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the discharge temperature (TH4).
Temperature restriction: No more Hz-up ··· When TH4 detects 105: or more

Hz-down ···

···

1-7. Condensing temperature over-rise prevention control

Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the outdoor condenser/evaporator temperature (TH6).
Temperature restriction: No more Hz-up ··· When TH6 detects 58: or more

Hz-down ···

···

-5Hz per min. when TH6 detects 60: or more

-10Hz per min. when TH6 detects 63: or more

1-8. Heat sink temperature over-rise prevention control

Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the heat sink temperature (TH8).
Temperature restriction:

Modelss
PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA

W Hz-down amount: -5Hz per minute

-6Hz per min. when TH4 detects 110: or more

-10Hz per min. when TH4 detects 118: or more

No more Hz-up Hz-down

:

71
78:
78:
78:

74:
81:
81:
81:

2. Fan

2-1. Normal control

Fan rotation times (rpm) will be controlled according to the outdoor outside
temperature (TH7).

• Control method: Inverter control

• Rotation times: Fan step (N) = 0 and 2 to 10

• Compressor start-up: Fan step is fixed to 9 for 30 seconds after the
start-up of compressor.

N=4

N=3

N=2

N=9

N=8

N=7

N=6

N=5

Outside temperature (TH7)

N=10

40 [:]-3 0 2 5 7 10 12 15 17 20 22 25 27 30 37

2-2. Correction of fan step according to the outdoor cond./eva. temperature

Fan step will be corrected according to the outdoor cond./eva. temp.(TH6).

• Correction range of condensing temperature : 19: to 62

:

• Correction range of fan step: -1 to +3

2-3. Correction of fan step according to the heat sink temperature

Fan step will be corrected according to the heat sink temperature (TH8).

• Correction range of heat sink temperature: 68: to 78

:

• Correction range of fan step: 0 to +2

Step (N)—Rotation
times(rpm)

Step

Rotation times(rpm)

(N)

RP3 RP4-6

0

0

95

0

95
110
130
155
180
220
260
415
700
720

10

1
2

115

3

135

4

165

5

200

6

245

7

305

8

450

9

700
720

2-4. Other

(1) Fan also stops when the compressor is being stopped. (Fan step = 0)

However, fan step will be set to 10 while the compressor is being stopped
due to the abnormal heat sink temperature (Error code = U5).
At this time, the compressor is just waiting for 3 minutes to restart.

39

Control modes RemarksControl details

3. LEV(A)

3-1. Normal control

Opening pulse will vary among steps (1 to 3) according to air conditioner’s
operating status.

• Control timing: Once every 5 minutes after 3 or 7 minutes have passed since
the compressor started.

• LEV opening pulse for each step:

Step

RP3 RP4 RP5 RP6

200

220

220

1

300
480

300
480

2
3

300
480

220
300
480

• Requirement for step-up
LEV opening pulse will step up when any of following conditions is satisfied.
(1) The discharge temperature (TH4) is 100: or more
(2) The outdoor condenser/evaporetor temperature (TH6) is 57: or more
(3) The discharge super heat temperature is 50: or more Super heat

temperature = Discharge temperature (TH4) - Outdoor condenser/evaporetor
temperature (TH6)
(4) The sub cool temperature is 12: or more
Sub cool temperature = Outdoor condenser/evaporetor temperature (TH6)

- Outdoor liquid pipe temperature (TH3)

• Requirement for step-down
LEV opening pulse will step down when any of following conditions is satisfied
and any of step-up conditions are NOT satisfied.
(1) The discharge temperature (TH4) is 90: or less.
(2) The outdoor condenser/evaporetor temperature (TH6) is 52: or less.
(3) The discharge super heat temp. is 40: or less.
Super heat temperature = Discharge temperature (TH4) - Outdoor
condenser/evaporetor temperature(TH6)
(4) The sub cool temperature is 3: or less.
Super heat temperature = Outdoor condenser/evaporetor temperature
(TH6) - Outdoor liquid pipe temperature (TH3)

• The step does not change if neither step-up conditions nor step-down
conditions are satisfied.

3-2. Compulsory step-up

When any of the following conditions is satisfied, the step will be forced to 3.
(1) The discharge temperature (TH4) is 110: or more.
(2) The condenser/evaporetor temperature (TH6) is 62: or more.

3-3. Stop control

When the LEV is being stopped, the step will be set to 3.

40

Control modes RemarksControl details

4. LEV(B)

4-1. Normal control

LEV opening pulse will be controlled according to the change of compressor
operating frequency and regulated every minute to adjust the discharge
temperature to let the intake super heat temperature be 0: to 5:.

• Control timing: Once per minute after 3 or 7 minutes have passed since the
compressor started.

• Opening pulse range: The following range is specified according to the
compressor operating frequency.

Compressor
frequency

49Hz or less
50Hz to 75Hz
76Hz to 90Hz
91Hz to more

Opening pulse range (Lower limit to upper limit)

PUHZ-RP3VHA PUHZ-RP4,5,6VHA

70 ~ 250
105 ~ 350
160 ~ 400
160 ~ 480

• Opening pulse range corresponding to the change of compressor operating
frequency
Opening pulse range = Present opening pulse O (Target frequency / Operating
frequency -1) O 0.8

• Compressor start-up
Opening pulse will be adjusted according to only the change of frequency
during 3 or 7 minute start-up. The start-up control time will be changed

according to the discharge temperature (TH4).
Discharge temperature (TH4) ] 30:: 3 minute start-up
Discharge temperature (TH4) < 30:: 7 minute start-up

80 ~ 300

90 ~ 350
100 ~ 400
120 ~ 480

5. Four way valve

4-2. Evaporation protection control

The targeted opening pulse should be made large in the condition written below.
Indoor cond./eva. temperature (TH5) - Indoor liquid pipe temperature (TH2) ] 6:
Set the targeted value of the discharge temperature about 5 to 15: lower.
W This control does not work for 3 or 7 minutes after the compressor gets started.

4-3. Low discharge super heat temperature protection control

Set a small value for the targeted opening pulse according to the discharge
super heat temperature.

• Correction range of the discharge super heat temp. : 10: or less
W This control does not work for 3 or 7 minutes after the compressor gets started.

4-4. Others

1 LEV opening pulse is set to 400 while the compressor is being stopped.
2 After LEV opening pulse is initialized to 0 by making 700 pulse down from

the present pulse, set the pulse to 400.
3 20 pulses are added to the present pulse if the following conditions are

satisfied within 14 minutes after the compressor gets started.
COOL: Indoor cond./eva. temperature (TH5) - Indoor liquid pipe temperature (TH2) ] 25:
HEAT: Outdoor cond./eva. temperature (TH6) - Outdoor liquid pipe temperature (TH3) ] 25:

5-1. Normal control

Always OFF during normal operation.

5-2. Change of Operation mode

When the mode changes from HEAT to COOL:

Operation mode
Four way valve

COOL
HEAT
ON
OFF

Discharge super
heat temp. is
calculated from
discharge temp.
(TH4) and
outdoor
cond./eva. temp.
(TH6).

41

8-2. HEAT operation

Control modes RemarksControl details

1. Compressor

1-1. Thermoregulating function

The outdoor unit receives information of set temperature and intake temperature
from the indoor unit through transmission and judges the compressor ON/OFF
controlled by thermoregulating from their temperature difference. However, the
compressor does not stop when the indoor unit is in the hot adjuster mode even
though the information tells the need to turn off the compressor.

1-2. Normal control

• Control timing: Once per minute after 3 minutes have passed since the
compressor started.

• Frequency changing range: -12Hz to +20Hz W1
W1.

However, in the following cases, the frequency changing amount, which is different
from the normal one, will be applied to control the operating frequency.
(1) Frequency is fixed to the minimum just before the compressor is stopped

by the thermoregulating function.

Intake temperature ] Set temperature - 0.5:··· Fixed to the minimum frequency.
Intake temperature [ Set temperature - 1.0:··· Fixation is released. (Returned to normal control.)
(2)

Correction of the frequency changing amount according to the estimated discharge temp.
If the estimated discharge temperature is more than 113
changing amount will be corrected.

• Correction amount: 0Hz to -6Hz
(3) Frequency control after the defrosting operation
After the defrosting operation is finished, the compressor will be stopped
for 1 minute and then get restarted.

1-3. Start-up control

Controls, which are conducted in 3 minutes after the compressor gets started,
are categorized according to the outside temperature(TH7) as shown below.

Outside temp.

TH7 < 0:

0: [ TH7 < 12:

TH7 ] 12:

Start-up pattern Defrosting restore

Initial start-up Restart

(A), (D)

(A)
(C)

(1) In case of pattern (A)
a. 0 min. to 1 min. after start-up: Fixed to 48Hz.
b.

1 min. to 3 min. after start-up: Fixed to the Hz which has been regulated

according to the temp. difference between intake temp. and set temp.

• Fixed frequency: minimum Hz to 48Hz.
(2) In case of pattern (B)
a. 0 min. to 1 min. after start-up: Fixed to the minimum Hz.
b.

1 min. to 3 min. after start-up: Fixed to the Hz which has been regulated

according to the temp. difference between intake temp. and set temp.

• Fixed frequency: minimum Hz or 42Hz.
(3) In case of pattern (C)
a. 0 min. to 3 min. after start-up: Fixed to the minimum Hz.
(4) In case of pattern (D)
a. 0 min. to 1 min. after start-up: Fixed to 70Hz.
b.

1 min. to 3 min. after start-up: Fixed to the 63 or 70 Hz which has been

regulated according to the temp. difference between intake temp. and set temp.

Maximum Hz will be limited to 70Hz for 10 minutes after the start-up of compressor.

1-4. Discharge temperature over-rise prevention control

The same control as that of COOL operation.

(B), (D)

(B)
(C)

start-up

(A), (D)

(A)
(A)

:

, the frequency

Refer to
“INDOOR UNIT
CONTROL” for
the detailed
detection
method.

Start-up pattern
when TH7 < 0
RP4-RP6···(A)
RP3···········(D)

:

1-5. Condensing temperature over-rise prevention control

Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the indoor cond./eva. temperature (TH5).

• Temperature restriction: No more Hz-up ··· When TH5 detects 53: or more
Hz-down ··· -5Hz per min. when TH5 detects 58: or more

-10Hz per min. when TH5 detects 63: or more

42

Control modes RemarksControl details

2. Fan

2-1. Normal control

Fan rotation times (rpm) will be controlled according to the outdoor outside
temperature (TH7).

• Control method: Inverter control

• Rotation times: Fan step (N) = 0, 9 and 10

N=10

N: Current fan step
N=9

4

Outside temperature (TH7)

6[:]

2-2. Start-up control in HEAT operation at low outside temperature (RP3 only)

[Requirement] All of following conditions should be satisfied.

a. The first start-up after the power has been reset, or the start-up in HEAT
mode after 30 minutes have passed since the compressor stopped.

b. Outside temperature (TH7) [ 0:
[Control details]
Fan step will be set to 0 (N = 0) for 2 minutes after the start-up of compressor.
Start-up control will turn into the normal control after the 2-minute operation of compressor.

Step (N)—Rotation
times(rpm)

Step

Rotation times(rpm)

(N)

RP3 RP4-6

0

0

95

0

95
110
130
155
180
220
260
415
700
720

10

1
2

115

3

135

4

165

5

200

6

245

7

305

8

450

9

700
720

Bypass valve control

3.
(RP3 only)

2-3. Others

(1) Fan also stops when the compressor is being stopped. (Fan step = 0)

However, fan step will be set to 10 while the compressor is being
stopped due to the abnormal heat sink temperature (Error code = U5).
At that time, the compressor is just waiting for 3 minutes to restart.

(2) In case of RP3, fan is being stopped for 2 minutes after the start-up of

compressor in HEAT mode at low outside tempereture (Fan step = 0)

3-1. Normal control

Start-up control in HEAT operation
[Bypass valve ON/OFF]
ON for 3 minutes after the compressor gets started operating.

43

Control modes RemarksControl details

4. LEV(A)

4-1. Normal control

LEV opening pulse will be controlled every minute to adjust the discharge
temperature in order to let the intake super heat temperature be 0: to 5:.

• Control timing: Once per minute after 3 or 7 minutes have passed since
the compressor started.

• Opening pulse range: The following range is specified according to the
compressor operating frequency.

Compressor
frequency

49Hz or less
50Hz to 75Hz
76Hz to 90Hz
91Hz to more

Opening pulse range (Lower limit to upper limit)

PUHZ-RP3VHA PUHZ-RP4,5,6VHA

80 ~ 250

95 ~ 350
130 ~ 400
130 ~ 480

• Opening pulse range corresponding to the change of compressor
operating frequency
Opening pulse range = Present opening pulse o (Target frequency /
Operating frequency -1) o 0.8

• Compressor start-up
Opening pulse will be adjusted according to only the change of frequency
during 3 or 7 minute start-up.

The start-up control time will be changed according to the discharge

temperature (TH4).

Discharge temperature (TH4) ] 30:: 3 minute start-up
Discharge temperature (TH4) < 30:: 7 minute start-up

70 ~ 300

90 ~ 350
100 ~ 400
120 ~ 480

4-2. Low discharge super heat temperature protection control

Set a small value for the targeted opening pulse according to the discharge
super heat temperature.

• Correction range of the discharge super heat temperature : 10: or less

• This control does not work for 3 or 7 minutes after the compressor gets started.

4-3. Evaporation protection control

20 pulse will be added to the present opening pulse in the condition written below.
Outdoor condenser/evaporator temperature (TH6) - Outdoor liquid pipe
temperature (TH3) ] 6:
W

This control does not work for 3 or 7 minutes after the compressor gets started.

4-4. Others

1 LEV opening pulse is set to 400 while the compressor is being stopped.
2

After LEV opening pulse is initialized to 400 by making 700 pulse down from

the present pulse, set the pulse to 400.

Discharge super heat
temp. is calculated from
discharge temp. (TH4)
and outdoor cond./eva.
temp. (TH6).

44

Control modes RemarksControl details

5. LEV(B)

5-1. Normal control

Opening pulse will vary among steps (1 to 3) according to air conditioner’s
operating status.

• Control timing: Once every 5 minutes after 3 or 7 minutes have passed since
the compressor started.

• LEV opening pulse for each step:

Step

RP3 RP4 RP5 RP6

200

180

180

1

300
480

300
480

2
3

300
480

180
300
480

• Start-up step
The step is set to 2 when the compressor starts up.

• Requirement for step-up
LEV opening pulse will step up when any of following conditions is satisfied.
(1) The discharge temp. (TH4) is 100: or more
(2) The outdoor condenser/evaporator temperature (TH6) is 57: or more
(3) The discharge super heat temperature is 50: or more
Super heat temperature = Discharge temperature (TH4) - Outdoor

condenser/evaporator temperature (TH6)

(4) The sub cool temperature is 12: or more
Sub cool temperature = Outdoor condenser/evaporator temperature (TH6)

- Outdoor liquid pipe temperature (TH3)

• Requirement for step-down
LEV opening pulse will step down when any of following conditions are
satisfied and above step-up conditions are not satisfied.
(1) The discharge temperature (TH4) is 90: or less
(2) The outdoor condenser/evaporator temperature (TH6) is 52: or less
(3) The discharge super heat temperature is 40: or less

Super heat temperature = Discharge temperature (TH4) - Outdoor

condenser/evaporator temperature (TH6)
(4) the sub cool temperature is 3: or less
Sub cool temperature = Outdoor condenser/evaporator temperature
(TH6) - Outdoor liquid pipe temperature (TH3)

• The step does not change if neither step-up conditions nor step-down
conditions are satisfied.

5-2. Compulsory step-up

When any of the following conditions are satisfied, the step will be forced to 3.
(1) The discharge temperature (TH4) is 110: or more.
(2) The condenser/evaporator temperature (TH6) is 62: or more.

5-3. Stop control

When the LEV is being stopped, the step will be set to 3.

45

Control modes RemarksControl details

6. Four way valve

6-1. Normal control

Always OFF during normal operation.

6-2. Change of Operation mode

• When the mode changes from HEAT to COOL:
Operation mode

Four way valve

• When the operation stops in HEAT mode:
Operation mode

Four way valve

6-3. Start-up control in HEAT operation at low outside temperature (RP3 only)

[Requirement] Same as the explanation in fan control.
[Control details] OFF for 2 minutes after the start-up of compressor, but ON if 2

6-4. In the defrosting operation

Always OFF during the defrosting operation

COOL
HEAT
ON
OFF

HEAT
Stop
ON
OFF

minutes pass.

10 minute

46

8-3. DRY operation

1. Compressor

Control modes RemarksControl details

Refer to “INDOOR
UNIT CONTROL”
for ON/OFF
judgement method

1-1. Thermoregulating function

The outdoor unit receives information of set temp. and intake temp. from the
indoor unit through transmission and judges the compressor ON/OFF with
thermoregulating function from their temperature difference.

2. Fan

2-1. Normal control

Fan rotation times (rpm) will be controlled according to the outdoor outside temp. (TH7).

• Control method: Inverter control

• Rotation times: Fan step (N) = 0 and 2 to 10

•

Comp. Start-up: Fan step is fixed to 9 for 30 seconds after the start-up of compressor.

2-2. Correction of fan step according to the outdoor cond./eva. temperature

Fan step will be corrected according to the outdoor cond./eva. temperature (TH6).

• Correction range of condensing temperature : 19: to 62:

• Correction range of fan step: -1 to +3

2-3. Correction of fan step according to the heat sink temperature

Fan step will be corrected according to the heat sink temperature (TH8)

• Correction range of heat sink temperature: 68: to 78:

• Correction range of fan step: 0 to +2

2-4. Others

Fan also stops when the compressor is being stopped. (Fan step = 0.)
However, fan step will be set to 10 while the compressor is being stopped due
to the abnormal heat sink temperature (Error code = U5). At this time, the
compressor is just waiting 3 minutes to restart.

1-2. Normal control

Same control as that of COOL operation.

1-3. Start-up control

Same control as that of COOL operation.

1-4. Indoor anti-freezing control

Not available

1-5. Outdoor frozen prevention control

Same control as that of COOL operation

1-6. Discharge temperature over-rise prevention control

Same control as that of COOL operation

1-7. Condensing temperature over-rise prevention control

Same control as that of COOL operation

1-8. Heat sink temperature over-rise prevention control

Same control as that of COOL operation.

1-9. Others

Same control as that of COOL operation.

3. LEV

Same control as that of COOL operation.

4. Four way valve

4-1. During normal operation

Always OFF during normal operation.

4-2. Operation mode change

When the mode changes from HEAT to COOL;

Operation mode
Four way valve

COOL
HEAT
ON
OFF

47

8-4. FAN operation

1. Compressor

2. Fan

3. Four way valve

Control modes RemarksControl details

Always OFF
Always OFF
Always OFF

1. Start

Control modes RemarksControl details

w Refer to the
table of “Defrosting
prohibition time”
on this page.

1-1. Requirements for starting

Defrosting starts when either of below conditions is satisfied.
(Conditions)
a. In HEAT operation and when the outdoor liquid pipe temp.(TH3) continues to

be -2: or less for 7 minutes after the compressor integrating operation time
fulfils defrosting prohibition time (T1 w).

b. In HEAT operation and when the outdoor liquid pipe temp.(TH3) continues to

be -5: or less for 7 minutes after the compressor integrating operation time
fulfils defrosting prohibition time (T3 w).

c. In HEAT operation and when the outdoor liquid pipe temp.(TH3) continues to

be -2: or less for 3 minutes after the compressor integrating operation time
fulfils the defrosting prohibition time (T1 w) and the compressor stops twice
within 10 minutes from its start-up.

d. In HEAT operation and when the outdoor liquid pipe temp.(TH3) continues to

be -5: or less for 3 minutes after the compressor integrating operation time
fulfils the defrosting prohibition time (T3 w) and the compressor stops twice

within 10 minutes from its start-up.
(Complementary explanation)
The (a) indicates the defrosting operation with the frost amount light.
The (b) indicates the defrosting operation with the frost amount heavy
The (c) indicates the defrosting operation in case the thermostat is turned on/off
frequently because the frost amount is small and the air-conditioning load is heavy.
The (d) indicates the defrosting operation in case the thermostat is turned on/off
frequently because the frost amount is large and the air-conditioning load is light.

2. Stop

1-2. Actuator at the beginning of defrosting operation

Actuator will be activated by the following procedure if any of the above
conditions is detected.

1 Compressor operating frequency will get down to 30Hz.
2 When the compressor operating frequency becomes 30Hz;

• Four way valve will be turned off.

• Outdoor fan will be stopped.

• Both LEV A and B opening pulse are set to 480.
After 1 and 2 are completed, the compressor will be set to the defrosting
operation frequency.

2-1. Requirements for ending

Defrosting stops when any of the following conditions is satisfied.
(Conditions)
a. 15 minutes have passed since the defrosting operation started.

b. The outdoor liquid pipe temperature (TH3) has become 20: or more within 2

minutes from the start of defrosting operation.

c. The outdoor liquid pipe temperature (TH3) has become 8: or more after the

defrosting operation is conducted for 2 minutes.

d. During defrosting operation, the compressor has been stopped due to errors

or something.

e. During defrosting operation, the operation mode except HEAT has been

selected by remote controller.

Model
name

Frequency

Defrosting operation
frequecy

PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA

80Hz
80Hz
80Hz
80Hz

8-5. Defrosting operation

Continued to the next page.

48

From the previous page.

Control modes RemarksControl details

2. Stop

2-2. Actuator at the end of defrosting operation

Actuator will be activated by the following procedure if any of the above
conditions except d & e is detected.

1 Start the outdoor fan.
2 Let the compressor operation frequency down to 30Hz from the defrosting

operation frequency.

3 Stop the compressor for 1 minute when the compressor operation frequency

becomes 30Hz.
After 1 to 3 are completed, set the compressor operation frequency to the
normal (start-up pattern A).

3.

Defrosting prohibition

time

Defrosting prohibition

4.
time

Defrosting prohibition time (T1 and T3) are decided by the previous defrosting
operation time (t2).

• Prohibition time table for ordinary region

Previous operation time

t2 [ 3 minutes
3 < t2 [ 7 minutes
7 < t2 [ 10 minutes
10 < t2 [ 15 minutes
t2 = 15 minutes

100 minutes

60 minutes
50 minutes
30 minutes
20 minutes

Prohibition time

T1 T3

30 minutes
20 minutes
20 minutes
20 minutes
20 minutes

• Prohibition time table for high humidity region

Previous operation time

t2 [ 7 minutes
7 < t2 [ 15 minutes

Prohibition time

T1 T3
50 minutes
20 minutes

20 minutes
20 minutes

• Others

Previous operation time

Operation mode has been changed to the other mode
except HEAT during defrosting operation.

Protection devices have worked during defrosting operation.
Initial prohibition time when power is reset.

Prohibition time

T1 T3
40 minutes
10 minutes

40 minutes

40 minutes
10 minutes

40 minutes

4-1. Requirements for starting

Compulsory defrosting operation will be conducted if all items below are
satisfied when SW1-1 (OFF ➜ ON) is detected during HEAT operation.
(Conditions)
a. The compressor is operating.
b. 10 minutes have passed since the compressor started or the last defrosting

operation was conducted.

c. The outdoor liquid pipe temperature is less than 8:.

4-2. Requirements for ending

Same conditions as the above ending conditions of normal defrosting

49

8-6. AUTO operation

1.

Initial operation mode

Control modes RemarksControl details

When a operation mode turns into AUTO operation;

1 HEAT mode will be operated if intake temperature < set temperature
2 COOL mode will be operated if intake temperature ] set temperature

2. Change of
operation mode

1 HEAT mode will turn into COOL mode when intake temperature ] set temperature + 2deg
and 15 minutes have passed since the HEAT operation started.
2 COOL mode will turn into HEAT mode when intake temperature [ set temperature – 2deg
and 15 minutes have passed since the COOL operation started.

3. COOL mode

Same controls as those of COOL operation.
Same controls as those of HEAT and defrosting operation.

4. HEAT mode

1. Basic control

Control modes Control details

1-1. Frequency setting

PUHZ–RP3VHA

PUHZ–RP4VHA

PUHZ–RP5VHA

PUHZ–RP6VHA

COOL

HEAT

COOL

HEAT

COOL

HEAT

COOL

HEAT

26
26
30
30
30
30
30
30

55
61
49
55
68
68
85
80

70
87
62
81
86
87
96
97

55
65
54
54
59
71
79
79

72
92
66
74
78
87
96
92

59
57
53
53
72
63
76
70

72
84
65
74
88
82
96
85

min

Rated max

PLA-RP•AA

Rated max

PEA-RP•EA

Rated max

PEAD-RP•EA

1-2. 1.2 V/F pattern

250
200
150
100

50

0

050

Operating frequency (Hz)

PUHZ-RP3VHA

W1. Actual performance does not exactly match the V/F line on both graphic charts due to
the air-conditioning load because the inverter control is based on vector.

W2. Actual values of V/F will be almost the same as the V/F line on the graphic chart because

the inverter control is based on voltage and frequency. However, they may not exactly
match the V/F line on the graphic chart because voltage correction control makes an effect
on the performance.

Voltage (V)

100 150

W 1 W 2

250
200
150
100

50

0

050

Operating frequency (Hz)

PUHZ-RP4~RP6VHA

Voltage (V)

100 150

8-7. Inverter control

50

Control modes RemarksControl details

2. Frequency

2-1. Frequency is restricted by the compressor electrical current (CT1).

Frequency control such as Hz-down and no more Hz-up will be conducted
according to the compressor electrical current (CT1).

No more Hz-up Hz-down

12.5 A

24.5A

3. Voltage correction

Models
PUHZ-RP3VHA
PUHZ-RP4~6VHA

3-1. Voltage is corrected by bus voltage.

Inverter voltage will be corrected by dc bus voltage.
Even though the power supply voltage varies within i10%, the voltage should
be corrected in order to make the output voltage of inverter stable.

3-2.

Voltage correction by compressor’s electric current (CT1). (PUHZ-RP4 to 6V only)
Output voltage of inverter is corrected by compressor’s electric current (CT1).

Models

PUHZ-RP4~6VHA

Correction of
starting current [A]

16

W Hz-down amount:

-5Hz per minute

13 A

26A

Correction of
max current [A]

24

4. Power supply to
locked compressor

5. 52C

4-1. Compressor energizing method

• Compressor ON/OFF pattern when power is supplied;

111

ON

OFF

Power supply

4hrs

1hr 1hr W Repeated

15 min. 15 min. 15 min.

1 Ener1ized the outside

temperature is 15 or less

• Compressor ON/OFF pattern when power is cut off;

ON

OFF

1

1hr

30 min.

1hr 1hr

15 min. 15 min. 15 min.

111

W Repeated

OFF

Comp. stopped

ON/OFF method

52C will turn ON/OFF in the following conditions.

• 52C turns ON when power is supplied, and remains ON regardless of the
compressor’s ON/OFF.

• 52C turns OFF when power is cut off.

“08” will be displayed
on the LED1 of “A­Control Service Tool”
while power is
supplied to the
compressor.

51

8-8. Replacement operation (RP4 to 6V Only)

1. Start and end of
replacement
operation

Control modes RemarksControl details

1-1. Requirements for starting

Replacement operation will start when SW8-2 on the outdoor controller board
is turned on while units are being stopped.

1-2. Requirements for ending

Replacement operation will end if any of the following conditions is satisfied.
a. 2 hours have passed since replacement operation started.
b. SW8-2 has been turned off.
c.

Operation (COOL / DRY / HEAT) has been started and controlled by remote controller.

w Normal air
conditioning can
be operated even
if SW8-2 remains
ON after the
replacement
operation is
finished.

w

Cold air comes
out of indoor unit
because the
replacement
operation is
conducted in
COOL operation.

w

Frozen protection
control may be
activated when the
indoor intake temp.
is 15: or less.

2. During replacement
operation

2-1. Normal control

In COOL operation replacement operation will be conducted by opening the
replacement filter circuit in order to circulate refrigerant.

• Compressor control
The same continuous operation as COOL operation regardless of intake temperature.

• LEV(A)control

Always closed.

• LEV(B)control

The same control as that of COOL operation.

• Fan control

The same control as that of COOL operation.

• Four way valve control

The same control as that of COOL operation. (Always OFF.)

• Solenoid valve

Always opened.

• Others

LED on the outdoor controller circuit board comes ON/OFF per second during
replacement operation.

2-2. Indoor frozen prevention control

The compressor will be stopped for 3 minutes if the indoor liquid pipe temperature
(TH2) or indoor condenser/evaporator temperature (TH5) is 3: or less after 10
minutes have passed since the compressor started.

52

8-9. Refrigerant collecting (pump down)

1.

Start and end of pump

down operation

Control modes RemarksControl details

1-1. Requirements for starting

Pump down operation will be conducted when SWP on the outdoor controller
board is turned on while the unit is being stopped.

1-2. Requirements for ending

Pump down operation will end if any of the following conditions is satisfied.
a. Low pressure switch has been used.
b. 3 minutes have passed since the pump down operation started.
c. Operation has been stopped by remote controller or changed to the other

mode except COOL.

d. Error has been detected.

2-1. Following controls are activated during pump down operation.

• Compressor control

The same continuous operation as COOL operation regardless of intake
temperature.

• LEV(A) control

Opening pulse is fixed to step 3 (480 pulse).

• LEV(B) control

Completely closed (0 pulse).

• Fan control

Fan step is fixed to step 10.

• Four way valve

OFF in COOL operation.

w

Low pressure
switch mentioned
in (a) is equipped
in RP4 to 6 only.

2. During pump down
operation

1 Pump down operation is considered to be finished normally when the ending
condition (a) or (b) is satisfied.
At this time, the outdoor controller board’s LED1 (green) turns OFF and LED2
(red) turns ON. The units cannot be operated until the power is reset.
(To prevent the units from operating with pump down operation.)
2 If the pump down operation ends due to the ending conditions (c) or (d), the unit
will be in a state of normal stop.

To prevent the
unit from
operating with
pump down
operation.

<Complementary
explanation for
above 2 controls>

53

9

PLA-RP • AA PEA-RP • EA

PEAD-RP • EA

J11~J15 (SW1) ; Unit setting
J21~J24 (SW2) ; Capacity setting

Applicable units

: Changeable function
: Not changeable function

INDOOR CONTROLLER BOARD

type Btype A

J11~J15

(SW1)

type AFunction

Model
settings

Capacity
settings

Pair number
setting with
wireless remote
controller

type B

PLA-RP • AA

Model

J11~J15 (SW1)

J11 J12 J13 J14 J15

PEA-RP • EA

Models

J11~J15 (SW1)

J11 J12 J13 J14 J15

PEAD-RP • EA

J21~J24

(SW2)

J41
J42

In above table Jumper connector : Short, Open
Note 1: If the settings of SW1 (model settings) or SW2 (capacity settings) on the service PCB are made incorrectly:

•If the SW1 settings are made incorrectly, the unit will not operate, or won't be able to operate normally.

•The SW1 (model) and SW2 (capacity) settings are used to send the indoor unit's model and capacity
information to the outdoor unit. The outdoor unit uses this information to perform control, so the expected
performance may not be achieved if the information is incorrect.

•In models with indoor fan phase control, pulsation control or DC fan control, the SW2 (capacity) settings are
used to control the fan air volume. If the settings are made incorrectly, the air volume may be higher or lower
than expected, performance may drop, or the noise level may increase.

0
1
2

3 ~ 9

Wireless remote
controller setting

Control PCB setting

J41 J42

PLA-RP3AA, AA1
PLA-RP4AA, AA1
PLA-RP5AA
PLA-

RP5AA1

PLA-

RP6AA, AA1

PLA-RP3AA, AA1
PLA-RP4AA, AA1
PLA-RP5AA
PLA-

RP5AA1

PLA-

RP6AA, AA1

PEA-RP3EA
PEA-RP4EA
PEA-RP5EA

PEA-RP6EA

PEA-RP3EA
PEA-RP4EA
PEA-RP5EA

PEA-RP6EA

PEAD-RP3EA, EA1
PEAD-RP4EA, EA1
PEAD-RP5EA, EA1

PEAD-RP6EA, EA1

PEAD-RP3EA, EA1
PEAD-RP4EA, EA1
PEAD-RP5EA, EA1

PEAD-RP6EA, EA1

Models

J21~J24 (SW2)

J21 J22 J23 J24

Models

SW2

1

ON
OFF
OFF

ON

2
OFF
OFF

ON
ON

3

OFF

ON
ON

ON

4
ON
ON
ON

ON

Service PCB

<Settings at time of factory shipment>
Wireless remote controller: 0
Control PCB: (for both J41 and J42)
Four pair number settings are supported.
The pair number settings of the wireless remote controller
and indoor control PCB (J41/J42) are given in the table on
the left. (' ' in the table indicates the jumper line is disconnected.)

DIP SWITCH FUNCTION

9-1. Indoor unit

DIP switch and jumper connector functions.
Each function is controlled by the jumper connector in the control p.c.board. Below table shows that the function setting by the
jumper connector is available or not in the control p.c.board of applicable units. Also J11~15 (SW1) and J21~24 (SW2) has Dip
switch with their jumper connector.

Functions and signification of the jumper connector (Dip switch)

54

9-2. Outdoor unit

1

2
3

4

3
4
5
6
1
2
3

ON OFF

No.

Function Effective timing

Action by the switch operation

Frequency setting w1

Power failure

automatic recovery w2

No function
No function

Change of the Hz upper limit in cooling
Change of the Hz lower limit in heating

Change of the Hz in defrosting

Change of the percentage to limit the Hz

Use of existing pipe

Replacement operation

No function

Pump down

Switch

SW5

SW7

w4

Dip

switch

Push

switch

SW8

SWP

Type of
Switch

Fixed

Auto recovery

—
—

Limited to 85% of the max Hz in cooling
Limited to 85% of the max Hz in heating

Limited to 85% of the max Hz in defrosting

Change of the percentage in case of SW7-3,4 (85% ➔ 70%)

Used

Start

—

Start

Normal

No auto recovery

—
—

Normal
Normal
Normal
Normal

Not used

Normal

—

Normal

During operation

(Except 3 minutes after starting.)

When power supply ON

—
—

Always

Always
Always
Always
Always
Always

Under suspension

—

Under suspension

Switch to “Low-level
Sound Priority Mode”

w3

1

2

1

OFF

OFF

Mode 1
Mode 2
Mode 3

OFF

ON

ON

ON

2 Cooling

Regulate max Hz
to spec.

Regulate max Hz
to spec.

Regulate max Hz
to spec.

Regulate max Hz
to spec.

Only TH7 } 30°C
regulate max Hz
to spec.

No regulation

Heating

Low-level Sound
Priority Mode

9-2-1. Function of switches

Type

of

switch

Dip

switch

Switch

SW1

SW4

No.

1
2

3

4

5

6

1
2

Function Effective timing

Compulsory defrosting Start Normal
Abnormal history clear

123

123

Refrigerant address setting

123

123

Test run Operating OFF

Test run mode setting Heating Cooling

Compulsory defrosting should be done as follows.

1Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2Compulsory defrosting will start by the above operation 1 if these conditions written below are satisfied.

• Heat mode setting

• 10 minutes have passed since compressor started operating or previous compulsory defrosting finished.

• Pipe temperature is less than or equal to 8:.
3Compulsory defrosting will finish if certain conditions are satisfied.
wCompulsory defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.

After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again. This
depends on the service conditions.

Action by the switch operation

ON OFF

When compressor is working
in heating operation. w

Clear Normal off or operating

ON

456ON123456ON123456ON123456

0123

456ON123456ON123456ON123456

4567

456ON123456ON123456ON123456

891011

456ON123456ON123456ON123456

12 13 14 15

ON

ON

ON

When power supply ON

Under suspension

w 1. Do not use only SW5-1 to fix the frequency setting. The compressor operating frequency can be fixed to the desired Hz
w 2. “Power failure automatic recovery” can be set by either remote controller or this DIP SW. If one of them is set to ON,

w 3. SW7-1,2 are used to switch the setting of “Low-level Sound Priority Mode”. However, local electrical construction will be

w 4. Do not use SW7 normally, or troubles may be caused by the units’ installed condition and used condition.

by the combination of the SW5-1 setting and optional parts “A Control Service Tool (PAC-SK52ST)” setting.
“Auto recovery” activates. Please set “Auto recovery” basically by remote controller because all units don’t have DIP

SW. Please refer to mode 01 in the table on page 69.

required to make use of this mode. Therefore SW7-1, 2 are effective only when the mode is available for the model.

Refer to 57.

55

CN31

Types Connector Function Effective timing

Connector

Jumper

J1

J3

J4

J5

J6

CN31

Emergency operation Emergency operation Normal

When power supply ON

J3

Model

Jumper

J4 J5 J6

Power supply setting

Single phase

3 phase

Cooling and

heat pump

When power supply ON

Cooling only

(ON side) Start

Short Open

Action by open/ short operation

Capacity settings

J2

Switch of cooling
only/cooling and
heat pump

Emergency operation

When power supply ON

Always

Always

:Short :Open

PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA

(OFF side) Normal

Fixing method of the compressor operating frequency

0 : OFF
1 : ON

SW2 Seting

Hz

1
0
0
0
0
1
1
0
0
0
1

2
0
0
1
0
0
1
0
0
1
1

3
0
1
0
0
0
0
1
1
0
1

4
0
0
1
0
1
0
1
0
1
1

5
0
0
0
1
1
0
0
1
1
1

6
0
0
0
0
0
1
1
1
1
1

20
30
43
53
63
73
83
94

108

118

The compressor operating frequency can be fixed by setting the SW2 (a switch of “A Control Service Tool PAC-SK52ST)
and turning on/off the SW5-1 on the controller board. However, the setting may not be fixed to the desired value in case of
a couple of minutes right after the start-up, in case the operating frequency is limited to some extents by various restrictive
controls such as the SW7-3 to 6 settings and in case the operating frequency is set to be out of the operating frequency
range designated for each model. Check the operating frequency on the LED display of the outdoor unit every time the
setting is changed.

w Frequency can be set by the combination of the 6-bit binary digit as shown above. (SW2-1 stands for the lowest bit, and

SW2-6 stands for the upper bit.)

9-2-2. Function of connectors and jumpers

56

Special function

(a) Low-level sound priority mode (Local wiring)

Unit enters into Low-level sound priority mode by SW7-1, 2 and external signal input setting.
Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual.
Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for Demand
input located on the outdoor controller board enables to control compressor operation frequency. In Low-level sound priority
mode, the maximum outdoor fan steps is regulated to 8 and the maximum operation frequency of the compressor is
regulated to specified range in cool mode. In heating mode, the maximum compressor operation frequency is regulated to
specified range.
W The performance is depends on the load of conditioned air of the room.

How to wiring

<Low-level sound priority mode circuit>

Insulate this point securely as
this is not used.

Purchased at local

Relay
supply

~

SW1

X

X

SW1 : Switch
X : Relay (Contact spec. : DC1mA)

Max. 10 m including local wiring

Adaptor for external
signal input
(PAC-SC36NA)

Red

3

Brown

Orange

2
1

Outdoor unit
controller board

3
2
1

CNDM

<Outdoor unit controller board>

CNDM

1) Make the circuit as shown above with Adaptor for external signal input(PAC-SC36NA).

2) Turn SW1 to on for Low-level sound priority mode.
Turn SW1 to off to release Low-level sound priority mode and normal operation.

(b) On demand control (Local wiring)

Demand control is available by external input. In this mode, the outdoor unit stops and indoor unit operates with fan mode.
W The setting of SW-7 is not required for the demand control.

How to wiring
Basically, the wiring is the same.
Connect an SW 1 which is procured at field to the between Orange and Red(1 and 3) of the Adaptor for external signal

input(PAC-SC36NA), and insulate the tip of the brown lead wire.

(c) Refrigerant collecting (pump down)
Perform the following procedures to collect the refrigerant when relocating or replacing the indoor or outdoor units.

1Before collecting the refrigerant, first make sure that the all of the SW5 DIP switches for function changes on the control

board of the outdoor unit are set to OFF. If all of the SW5 switches are not set to OFF, record the settings and then set all of
the switches to OFF. Now, start refrigerant collecting operation. After moving the unit to a new location and completing the
test run, set the SW5 switches to the previously recorded settings.

2Turn on the power supply (circuit breaker).

wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If

“CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

3 Close the liquid stop valve.
4 Set the SWP switch on the outdoor controller board to ON. The compressor (outdoor unit) and ventilators (indoor and

outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the
outdoor unit are lit.

wSet the SWP switch (push-button type) to ON in order to perform refrigerant collecting operation only when the unit is

stopped. However, refrigerant collecting operation cannot be performed until compressor stops even if the unit is stopped.
Wait three minutes until compressor stops and set the SWP switch to ON again.

5Because the unit automatically stops after the refrigerant collecting operation is conducted for around 2 to 3 minutes, make

sure to close the gas stop valve immediately. LED1 is not lit and LED2 is lit at this time. If LED1 is lit and LED2 is not lit at
this time, please repeat the procedure from 2.

6Turn off the power supply (circuit breaker.)

<Outdoor unit controller board>

Pump down

57

9-2-3. Optional parts

w Use CN33 open.

(2) Function of jumpers

(1) Function of switches

w Use SW3 set to OFF.

Type of
switches

DIP SW

SW2

SW2

1
2
3
4
5
6

1

Switch

Connector FunctionTypes

CN33 Not applicableConnector

Function

Changing of LED
display
<Self-diagnosis>

Operation monitor Operation monitor

Under operation or
suspension

No.

ON

Fixing the selected mode
<Not applicable>

———

OFF

Short

Open

—

— OFF

Action by the switch operation

Action by open/short

Effective timing

Effective timing

A-control Service Tool [ PAC-SK52ST ]

● Function of switches

58

<Outdoor unit operation monitor function>

1ON23456

1ON23456

1 second

interval

Display Operation Model

The tens digit : Operation mode

The ones digit : Relay output

O

C
H
d

Display

0
1
2
3
4
5
6
7
8

A

Compressor

Warming-up
Compressor

4-way valve

Solenoid valve

—
—
—

—
ON
ON
ON
ON

—

—

—
—
—
—
—
—
—

—
ON
ON

—

—
ON
ON

—

—
ON
ON

—
ON

—

ON

—

ON

—

ON

—

ON

—
—

OFF / FAN

COOLING / DRY w

HEATING

DEFROSTING

Display

Contents to be inspected (When power is turned on)
F3
F5
F9
E8
E9
EA
Eb
Ec

E0~E7

63L connector(red) is open.

63H connector(yellow) is open.

2 connectors (63H/63L) are open.

Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)

Indoor/outdoor communication error (Transmitting error) (Outdoor unit)

Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)

Mis-wiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)

Startup time over

Communication error except for outdoor unit

Display

Inspection unit
0
1
2
3

Outdoor unit

Indoor unit 1

Indoor unit 2

Indoor unit 3

Display

Contents to be inspected (During operation)

U1
U2
U3
U4
U5
U6
U7
UF

UH

UL

UP
P1~P8
A0~A7

Abnormal high pressure (63H worked)
Abnormal high discharging temperature, shortage of refrigerant
Open/short circuit of discharging thermistor(TH4)
Open/short of outdoor unit thermistors(TH3, TH6, TH7 and TH8)
Abnormal temperature of heat sink
Abnormality of power module
Abnormality of super heat due to low discharge temperature
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure (63L worked)
Compressor overcurrent interruption
Abnormality of indoor units
Communication error of high-prior signal (M-NET)

[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)]

Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by control­ling DIP SW2 on ‘A-Control Service Tool’.

Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

Display detail

Explanation for display Unit

<Digital indicator LED1 working details>

(Be sure the 1 to 6 in the SW2 are set to OFF.)
(1) Display when the power supply ON.

When the power supply ON, blinking displays by turns.
Wait for 4 minutes at the longest.

(2) When the display lights. (Normal operation)

1Operation mode display.

(Lighting)

LED1

wC5 is displayed during replacement opera-

tion. <RP4~6VHA only>

2Display during error postponement

Postponement code is displayed when co­mpressor stops due to the work of protecti­on device.
Postponement code is displayed while error
is being postponed.

(3) When the display blinks

Inspection code is displayed when compressor stops due to the work of protection devices.

SW2

(Initial setting)

59

SW2 setting

1ON23456

1ON23456

1ON23456

1ON23456

1ON23456

1ON23456
1ON23456

1ON23456

1ON23456

10

1ON23456

1

05

4

25

2

45

1

25

1

50

1ON23456

Display detail

Pipe temperature / Liquid(TH3)
– 40~90

Explanation for display Unit

– 40~90
(When the coil thermistor detects 0: or below, “–”

and temperature are displayed by turns.)

(Example) When -10:;

0.5 secs. 0.5secs. 2 secs.

:

Discharge temperature (TH4)
3~217

Output step of outdoor FAN
0~10

The number of ON / OFF times of
compressor
0~9999

Compressor integrating operation times
0~9999

Compressor operating current.
0~50

3~217
(When the discharge thermistor detects 100: or

more, hundreds digit, tens digit and ones digit are
displayed by turns.)

(Example) When 105:;

0.5 secs. 0.5secs. 2 secs.

0~10

0~9999
(When the number of times is 100 or more,

hundreds digit, tens digit and ones digit are
displayed by turns.)

(Example) When 42500 times (425 ✕100 times);

0.5 secs. 0.5secs. 2 secs.

0~9999
(When it is 100 hours or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 2450 hours (245 ✕10 hours);

0.5 secs. 0.5secs. 2 secs.

0~50
wOmit the figures after the decimal fractions.

:

Step

100 times

10 hours

A

Compressor operating frequency
0~225

0~255
(When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

LEV-Aopening pulse
0~480

0~480
(When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 150 pulse;

0.5 secs. 0.5secs. 2 secs.

Error postponement code history (1)
of outdoor unit

Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.

Operation mode on error occurring Operation mode of when operation stops due to

error is displayed by setting SW2 like below.

(SW2)

60

Hz

Pulse

Code

display

Code

display

SW2 setting

1ON23456
1ON23456

1ON23456

1ON23456

1ON23456

1ON23456

15

1

30

2

45

1

05

1ON23456

1ON23456

Capacity

RP3V
RP4V
RP5V
RP6V

Code

14
20
25
28

Display detail

Pipe temperature / Liquid(TH3) on error
occurring
– 40~90

Explanation for display Unit

– 40~90
(When the coil thermistor detects 0: or below, “–”

and temperature are displayed by turns.)

(Example) When –15:;

0.5 secs. 0.5secs. 2 secs.

:

Compressor temperature (TH4) or
discharge temperature (TH4) on error
occurring
3~217

Compressor operating current on error
occurring
0~20

Error code history (1) (latest)
Alternate display of abnormal unit
number and code

Error code history (2)
Alternate display of error unit number
and code

3~217
(When the temperature is 100: or more, the

hundreds digit, tens digit and ones digit are
displayed by turns.)

(Example) When 130:;

0.5 secs. 0.5secs. 2 secs.

0~20

When no error history,
“ 0 ” and “– –” are displayed by turns.

When no error history,
“ 0 ” and “– –” are displayed by turns.

:

A

Code

display

Code

display

Thermo ON time
0~999

Test run elapsed time
0~120

The number of connected indoor units

Capacity setting display

0~999
(When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 245 minutes;

0.5 secs. 0.5secs. 2 secs.

0~120
(When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 105 minutes;

0.5 secs. 0.5secs. 2 secs.

0~3
(The number of connected indoor units are dis­played.)

Displayed as an
outdoor capacity code.

61

Minute

Minute

Unit

Code

display

SW2 setting

1ON23456

1ON23456

1ON23456

1ON23456

Setting details

• The tens digit (Total display for applied setting)

• The ones digit

H·P /

Cooling only

Single phase / Three phase

Display details

0 : H·P 1 : Cooling only
0 :

Single phase

2 :

Three phase

Setting details

Defrosting switch

Display details

0 : Normal 1 : For high humidity

1ON23456

1ON23456

1ON23456

Code

0
1
2
3
4
5
6
7

Indoor unit

Status of control

Outdoor unit

Normal

Hot adjustment

Defrosting

—

Heater ON

Anti-freezing

Over-rise prevention

Compressor OFF

Normal

Hot adjustment

Defrosting

—

Heater ON

Anti-freezing

Over-rise prevention

Compressor OFF

1ON23456

1ON23456

Display detail

Outdoor unit setting information

Explanation for display

(Example) When heat pump,three phase and

defrosting (normal) are set up, “20” is
displayed.

Unit

Code

display

Indoor pipe temperature / Liquid
(TH2(1))
Indoor 1
– 39~88

Indoor pipe temperature / Cond. / Eva.
(TH5(1))
Indoor 1
– 39~88

Indoor pipe temperature / Liquid
(TH2(2))
Indoor 2
– 39~88

Indoor pipe temperature / Cond. / Eva.
(TH5(2))
Indoor 2
– 39~88

Indoor room temperature (TH1)
8~39

– 39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

8~39

:

:

:

:

:

Indoor setting temperature
17~30

Indoor control status

Outdoor control status

17~30

:

This code is referred to check the unit’s operating status.

Code

display

62

1ON23456

1ON23456

1ON23456

1ON23456

1ON23456

SW2 setting

1ON23456

1ON23456

1ON23456

00

1

Display detail

Outdoor pipe temperature / Cond./
Eva. (TH6)

-39~88

Explanation for display Unit

-39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

:

1ON23456

Outdoor outside temperature (TH7)

-39~88

Outdoor heat sink temperature (TH8)

-40~200

Discharge super heat. SHd
0~255

Cooling = TH4-TH6
Heating = TH4-TH5

Sub cool. SC
0~130

Cooling = TH6-TH3
Heating = TH5-TH4

Input current of outdoor unit

-39~88
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

-40~200
(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

(When the thermistor detects 100: or more,

hundreds digit, tens digit and ones digit are
displayed by turns.)

0~255
(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by
turns.)

0~130
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by turns.)

0~500
(When it is 100 or more, hundreds digit, tens digit

and ones digit are displayed by turns.)

:

:

°C

°C

0.1 A

1ON23456

LEV-B opening pulse

Targeted operation frequency
0~255

DC bus voltage
180~370

Capacity save
0~255
When air conditioner is connected to
M-NET and capacity save mode is
demanded, “0”~”100” is displayed.

When there is no setting
of capacity save “100” is
displayed.

0~480
(When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

0~255
(When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

180~370
(When it is 100V or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

0~100
(When the capacity is 100% hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 100%;

0.5 secs. 0.5secs. 2 secs.

Pulse

Hz

V

%

63

SW2 setting

1ON23456

1ON23456

1ON23456

1ON23456

1ON23456
1ON23456

25

1

1ON23456

30

1

1ON23456

1ON23456

15

1ON23456

15

Display detail

Error postponement code history (2)
of outdoor unit

Explanation for display Unit

Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.

Code

display

Error postponement code history (3)
of outdoor unit

Error code history (3) (Oldest)
Alternate display of abnormal unit num­ber and code.

Error thermistor display

When there is no error thermistor,
“–“ is displayed.

Operation frequency on error occurring
0~255

Fan step on error occurring
0~10

Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.

When no error history, “0” and “– –“ are displayed by
turns.

3: Outdoor pipe temperature /Liquid (TH3)
6: Outdoor pipe temperature /Cond./Eva. (TH6)
7: Outdoor outside temperature (TH7)
8: Outdoor radiator panel (TH8)

0~255
(When it is 100Hz or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

0~10

Code

display

Code

display

Code

display

Hz

Step

LEV-Aopening pulse on error occurring
0~480

Indoor room temperature (TH1) on error
occurring
8~39

Indoor pipe temperature / Liquid (TH2)
on error occurring

-39~88

Indoor pipe temperature / Cond./ Eva.
(TH5) on error occurring

-39~88

0~480
(When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 130 pulse;

0.5 secs. 0.5secs. 2 secs.

8~39

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

Pulse

:

:

:

64

1ON23456

SW2 setting

1ON23456

1ON23456

1ON23456

15

15

50

1

1ON23456

1ON23456

1ON23456

15

1

15

4

1ON23456

Display detail

Outdoor pipe temperature / Cond./ Eva.
(TH6) on error occurring

-39~88

Explanation for display Unit

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

:

Outdoor outside temperature (TH7) on
error occurring

-39~88

Outdoor heat sink temperature (TH8) on
error occurring

-40~200

Discharge super heat on error occurring
SHd
0~255

Cooling = TH4-TH6
Heating = TH4-Th5

Sub cool on error occurring. SC
0~130

Cooling = TH6-TH3
Heating = TH5-TH2

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-40~200
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by
turns.)

0~255
(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by
turns.)

(Example) When 150°C;

0.5 secs. 0.5secs. 2 secs.

0~130
(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by
turns.)

(Example) When 115°C;

0.5 secs. 0.5secs. 2 secs.

:

:

:

:

Thermo-on time until error stops
0~999

Indoor pipe temperature / Liquid
(TH2 (3))
Indoor 3

-39~88

Indoor pipe temperature / Cond./ Eva.
(TH5 (3))
Indoor 3

-39~88

0~999
(When it is 100 minutes or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 415 minutes;

0.5 secs. 0.5secs. 2 secs.

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

-39~88
(When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

When there is no indoor unit, “00” is displayed.

65

Minute

:

:

SW2 setting

1ON23456

1ON23456

1ON23456

Code

1
2

Compressor frequency control
Primary current restriction control
Secondary current restriction control

• Tens digit

Code

1
2
4
8

Compressor frequency control

Discharging temperature over-rise prevention control
Condensing temperature over-rise prevention control
Frozen prevention control
Heat sink temperature over-rise prevention control

• Ones digit

(Example)
In the following cases(1 to 3), the code will
be displayed as shown in the figure.

1 Primary current restriction control
2

Condensing temperature over-rise prevention control

3

Heat sink temperature over-rise prevention control

Heat sink temperature over-rise
Correction value (0 to +2 ) of FAN
step for this control will be displayed.

• Ones digit

Code

- or
0 to 2

Code
0 to 2

Condensing temperature over-rise
Correction value (-1 to +2 ) of FAN
step for this control will be displayed.
“-“ will be displayed in case the
correction value is -1.

• Tens digit

(Example)
In case of 1 and 2, correction values of fan
step are displayed as shown in the figure.
1 The correction value of fan step for the
condensing temperature over-rise
prevention control is +1.
2 The correction value of fan step for the

heat sink temperature over-rise prevention

control is +2.

Display detail

Compressor frequency control

Explanation for display Unit

This code is referred to check the unit’s operating
status.

Code

display

FAN Control

Replacement operation

WIf replacement operation is conducted

even once, “1” is displayed.
If replacement operation time is less
than 2 hrs. “0” is displayed.

This code is referred to check the unit’s operating
status.

Code

display

1: Conducted.
0: Not yet.

–

66

FUNCTION SETTING10

FUNCTION

FUNCTION

1

2

3

FUNCTION

FUNCTION

3

4

Selecting functions using the wired remote controller

1 Check the function selection setting.
2 Switch to function setting mode. w

(Press A and B at the same time
with the remote controller stopped.)

w For modes 15 and higher,

press J and B at the same
time.

3 Specify refrigerant address 00 (outdoor unit)
4 Specify unit No. 00. (indoor unit)

(Use C and D.)

5 Enter the setting.

(Press E.)

(Specified indoor unit:
BLOW operation)

Change refrigerant
address unit No.

6

Select mode No 02

(room temperature detection position).

7

Select setting No. 03 (remote controller fixed).

(Use

F

and G.)

9

8 Enter the setting.

(Press E.)

Finished

10

Function selection end screen

(Press A and B at the same time.)

YES

YES

NO

NO

Example:
Selecting room temperature
detection position

F
E

G

STAND BY
DEFROST

PAR-20MAA

123

CENTRALLY CONTROLLED

CLOCK

CHECK

˚C

ERROR CODE

TEMP.

TIMER SET

CD

ON OFF

4

1Hr.

NOT AVAILABLE

˚C

FILTER
CHECK MODE
TEST RUN
FUNCTION

ON/OFF

CHECK TEST

Wired type

1 Mode number
2 Setting number
3 Refrigerant address
4 Unit number

Changing the power voltage setting

• Be sure to change the power voltage setting depending on the voltage
used.

FILTER

A
B

[Operating instructions] (entering settings with a wired remote controller)
1 Go to the function setting mode.

Switch OFF the remote controller.
Press the A FILTER and B TEST RUN buttons simultaneously and hold
them for at least 2 seconds. FUNCTION will start to flash. The refrigerant
address display will start to flash momentarily (see diagram 1).

2 Setting the refrigerant address

Use the C (TIMER SET) button to set the refrigerant address
(3) to 00 (see diagram 2). Press to increase the value or to
decrease it.

*

00 is the typical setting. When operating in a group configuration, use
the correlating refrigerant address (see the technical manual for details
on setting the refrigerant address for a group). The refrigerant address­es must be set in order when performing the following operation.

If the unit stops two seconds after the FUNCTION display starts to flash
or [88] starts to flash in the room temperature display, a transmission
problem may have occurred. Check to see if there is some source of
transmission interference (noise) nearby.

If you make a mistake during any point of this procedure, you can quit
the function setting mode by pressing 8 once and then return to step

1.

3 Setting the unit number

Press D (CLOCK ON OFF) and [--] will start to flash in the unit number
(4) display (see diagram 3).
Use the C (TIMER SET) button to set the unit number to 00
(see diagram 3). Press to increase the value or to decrease it.

Unit number 00 = the function setting selection for the entire refrigerant
system.

67

4

1

3 00 refrigerant address

(a)

(c)

(b)

(g)

(h)

FUNCTION

(d) (e)

(f)

4 Setting the refrigerant address/unit number

Press the E MODE button to designate the refrigerant address/unit num­ber. [--] will flash in the mode number (1) display momentarily (see dia­gram 4).

*

If [88] appears in the room temperature section, the selected refrigerant
address does not exist in the system. Also, if [F] appears in the unit
number display section, the selected unit number does not exist. Enter
the correct refrigerant address and unit number at steps 2 and 3.

Fan draft operation will start when settings are confirmed using the E
MODE button. You can also use this operation to find out what func­tions are assigned to which unit numbers and the locations of those
indoor units. Note that the fan draft operation will start for all of the
indoor units that have been assigned refrigerant addresses when 00 or
AL is the assigned unit number.

If an indoor unit other than those designated with refrigerant addresses

*

emits a fan draft when a different refrigerant grouping is being used,
the set refrigerant address have probably overlapped. Reassign the
refrigerant addresses at the DIP switch of the outdoor unit.

Example) When the refrigerant address is set to 00 and the unit number is

02.
(a) Outdoor unit

(b) Indoor unit
(c) Unit number 01
(d) Unit number 02
(e) Unit number 03
(f) Fan draft
(g) Designate operation
(h) Remote controller

5

5 Selecting the mode number

Press the F (TEMP) buttons to set the mode number (1) to

1

FUNCTION

6

04 (see diagram 5). Press to increase the value or to decrease
it.

Mode number 04 =power voltage switching mode

6 Selecting the setting number

1 will start to flash as the currently specified setting number (2) when the

button G is pressed (see diagram 6). Use the (TEMP) but-

FUNCTION

2

tons to specify 2 as the setting number (see diagram 6). Press to
increase the value or to decrease it.
(2) Setting number 1 = 240V
(2) Setting number 2 = 220V/230V

7 Designating the mode and setting numbers

The mode and setting numbers (1) (2) will start to flash when the MODE

FUNCTION

2

7

button E is pressed and the designation operation will begin (see diagram

7). The numbers are set when the flashing settings stay lit (see diagram

7).

*

If [---] appears in the room temperature display as the mode/setting
number, or if a flashing [88] display appears, a transmission problem
may have occurred. Check to see if there is some source of transmis­sion interference (noise) nearby.

FUNCTION

21

8 Complete function selection

Press the FILTER A and TEST RUN B buttons simultaneously for at least
two seconds. The function selection screen will disappear momentarily and
air conditioner OFF display will appear. (See diagram 8)

*

Do not use the remote controller for 30 seconds after completing the

FUNCTION

function selection.

8

FUNCTION

68

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

CHECK

RESET

SET

CLOCK

E

C,D

F

A

B

CHECK

h

CHECK

min

h

h

CHECK

00

1

CHECK

00

2

CHECK

04

3

CHECK

01

4

Flow of function selection procedure

The flow of the function selection procedure is shown below. This example shows how to turn
off the function that raises the set temperature by 4 degrees during HEAT operation .
The procedure is given after the flow chart.

1 Check the function selection setting.
2 Switch to function selection mode.

(Enter address "50" in troubleshooting
mode, then press the HOUR button.)

Troubleshooting mode is the mode entered when
you press the INSPECT button twice to display
"INSPECT".

3 Specify unit No. "01" (since the function applies to unit 01).

(Set address "01" while still in troubleshooting mode, then press the MINUTE button.)

Note: You can't specify the refrigerant address.
4

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation).

(Set address "24" while still in troubleshooting mode, then press the HOUR button.)

6

Finished

8 End function selection mode.

(End troubleshooting mode.)

YES

NO

Note: When you switch to function selection mode

on the wireless remote controller's operation
area, the unit ends function selection mode
automatically if nothing is input for 10 minutes
or longer.

5 Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Change
unit No.

YES

NO

7

Wireless remote controller type

[Operating instructions] (entering settings with a wireless remote controller)
Changing the power voltage setting

Be sure change the power voltage setting depending on the voltage used.

1 Go to the function select mode

Press the button F twice continuously.
(Start this operation from the status of remote controller display turned off.)

is lighted and “00” blinks.
Press The temp button C once to set “50”. Direct the wireless remote
controller toward the receiver of the indoor unit and press the button A.

2 Setting the unit number

Press the temp button C and D to set the unit number “00”. Direct the
wireless remote controller toward the receiver of the indoor unit and press the

button B. (The display changes at each press: 01 to 50)

•When controlling each unit (unit 01 to 04) individually ➜

Select "01" to "04."

•When controlling all the units (unit 01 to 04) at once ➜

Select "07."

3 Selecting a mode

Enter 04 to change the power voltage setting using the C and D
buttons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the button A.

Current setting number: 1 = 1 beep (one second)

4 Selecting the setting number

Use the C and D buttons to change the power voltage setting to 01
(240V).
Direct the wireless remote controller toward the sensor of the indoor unit and
press the button A.

2 = 2 beeps (one second each)
3 = 3 beeps (one second each)

69

Function

Mode

No.

01

02

03

04
05

15
17

19

07

08

09

10

11

12
13
23
24

25

27
28

Settings

Power failure
automatic recovery
Indoor temperature
detecting

LOSSNAY
connectivity

Power voltage
Auto operating

mode
Frost prevention
temperature
Change of
defrosting control
Thermo differential
setting

Filter sign

Fan speed

No. of air outlets

Installed options (high­performance filter)
Up/down vane
setting

Energy saving air flow
(Heating mode)
Humidifier
(Direct Add-on type)
Swing

Set temperature in heating
mode 4deg-up
Fan speed when the
heating thermostat is
OFF.
Fan speed when the
cooling thermostat is OFF.
Detection of abnormality
(P8) of the pipe temperature

Not available
Available
Indoor unit operating average
Set by indoor unit's remote controller
Remote controller's internal sensor
Not supported
Supported (indoor unit in not equipped with outdoor-air intake)
Supported (indoor unit in equipped with outdoor-air intake)
240V
220V, 230V
Auto energy-saving operation ON
Auto energy-saving operation OFF
2:
3:
Standard
High humidity region
Normal
5:
10:
100Hr
2500Hr
No filter sign indicator
Quiet
Standard
High ceiling
4 directions
3 directions
2 directions
Not supported
Supported
No vanes
Equipped with vanes (No.1 set)
Equipped with vanes (No.2 set)
Disabled
Enabled
Not supported
supported
Not available
Available
Available
Not available
Extra low
Low
Setting fan speed
Setting fan speed
Stop
Available
Not available

PLA-RP • AA PEA-RP • EA PEAD-RP • EA

standard
High ceiling 1
High ceiling 2

PLA-RP·AA type

5 To select multiple functions continuously

Repeat steps 3 and 4 to change multiple function settings continuously.

6 Complete function selection

Direct the wireless remote controller toward the sensor of the indoor unit and
press the button E.

Note:
Whenever changes are made to the function settings after construction or
maintenance, be sure to record the added functions with an “ ”, in the
“Check” column provided on the chart.

Things to remember when entering function selections:

The basic procedure for entering function selections is the same as described for switching between power voltages. However, there are
some differences at step 33for selecting the unit number, step 55for selecting the mode number and step 66for selecting the unit number.

The following Tables 2 and 3 list the various function settings, mode numbers and setting numbers. Table 2 details the functions of the entire
refrigerant system while Table 3 shows the functions that can be set for the indoor unit.
In case of setting the mode number from 15 to 28 with the wired remote controller, shift to the function selecting mode by pressing JJ(Air
direction) button and BB(TEST RUN) button at the same time for 2 seconds or more.
(The function selecting mode will be released in the same way as the one of setting it.)

Other function selections

Now that you know how to change the power voltage setting, there are several other settings that can be changed as well. The following Table
lists the various settings that can be changed through the remote controller and the default settings of the various units.

Table 1

70

Function

Settings

Mode No.

Setting No.

Check Remarks

Filter sign

Fan speed

No. of air outlets

Installed options (high­performance filter)
Horizontal vane
setting

Energy saving air
flow (Heating mode)
Swing

Set temperature in
heating mode 4deg-up

Fan speed when the
heating thermostat is OFF

Fan speed when the
cooling thermostat is OFF

Detection of abnormality
(P8) of the pipe temperature

100Hr
2500Hr
No filter sign indicator
Quiet
Standard
High ceiling
4 directions
3 directions
2 directions
Not supported
Supported
No vanes
Equipped with vane (No.1 set)
Equipped with vane (No.2 set)
Disabled
Enabled
Not available
Available
Available
Not available
Extra low
Low
Setting fan speed
Setting fan speed
Stop
Available
Not available

1
2
3
1
2
3
1
2
3
1
2
1
2
3
1
2
1
2
1
2
1
2
3
1
2
1
2

07

08

09

10

11

12
23
24

25

27
28

standard
High ceiling 1
High ceiling 2

PLA-RP·AA type

Refer to w1.
Refer to w2.

Function

Settings

Mode No.

Setting No.

Check Remarks

Power failure
automatic recovery

Indoor temperature
detecting

LOSSNAY
connectivity

Power voltage
Auto operating

mode
Frost prevention
temperature
Humidifier control

Change of
defrosting control

Not available
Available
Indoor unit operating average

Set by indoor unit's remote controller
Remote controller's internal sensor
Not supported
Supported (indoor unit in not equipped with outdoor-air intake)
Supported (indoor unit in equipped with outdoor-air intake)
240V
220V, 230V
Auto energy-saving operation ON
Auto energy-saving operation OFF
2:
3:
When the compressor operates, the humidifier also operates.
When the fan operates, the humidifier also operates.
Standard
High humidity region

1
2
1

2
3
1
2
3
1
2
1
2
1
2
1
2
1
2

01

02

03

04
05
15
16
17

Approx. 4-minute wait-period
after power is restored.

Table 2. Itemised functions of the entire refrigerant system (select unit number 00)

Table 3. Itemised functions of the indoor unit (select unit numbers 01 to 03 or AL [Wired remote controller] / 07 Wireless remote controller])

3 Setting the unit numbers

Set “00” as the unit number when setting functions from Table 2.
When setting functions from Table 3:

- When setting functions for an indoor unit in an independent system, set the unit number to 01.

- When setting functions for a simultaneous-Twin Triple indoor unit system, assign unit numbers from 01 to 03 each indoor unit.

- When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, assign “AL” as the unit number.

5 Selecting the mode number

Selecting from Table 2 and Table 3.

6 Selecting the setting number

Selecting from Table 2 and Table 3.

w1 Horizontal vane First setting: The angle of the vane is set to standard.
w2 Horizontal vane Second setting: The angle of the vane is finely changed as a measure against smudging.

71

Supplementary information

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

RESET

SET

CLOCK

MODEL SELECT

Model No.

Temperature
button

SET button

PLA–RP·AA

001

Heat pump

Type Model No. Model

1) Energy-saving warm airflow control
Start timing: Starts when thermo is switched from ON to OFF after HEAT mode and the hot adjust process

have finished.

End timing: Ends when any of the following conditions is met:

(1) The unit is switched to any mode other than HEAT.
(2) The unit enters DEFROST operation.
(3) Intake temperature ! Set temperature
(4) More than 5 minutes after the start of energy-saving warm airflow fan control
(5) The unit is switched to hot adjust.

•Energy-saving warm airflow control keeps the vane in the downward position and maintains the fan speed

when thermo is turned OFF.

Setting model No.

•By setting the wireless remote controller model No., you can change the functions that the remote controller
provides. Change the model No. as needed.

Procedure

1. Press the SET button using a pointed implement.
"MODEL SELECT" flashes and the currently set
model No. appears (steadily-lit).

2. Press the temperature buttons to select the
model No. to set.

3. Press the SET button using a pointed implement.
"MODEL SELECT" and the set model No. appear
(steadily-lit) for 3 seconds, then disappear.

•When setting a model No., make sure it is the correct

model No. for the unit's functions. If an incorrect model
No. is set, the unit's operation will not correspond with
the remote controller's display.

72

001 002003 004 005 006 007008 009 010 011 012 013 014015 016 017018 019 020021 022 023 024 025 026 027 028029 030 031 032 033 034035 036037 038 039 040041 042043

Model No.

1 Speed 4

2 Speed 3

3 Speed 2

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

4 Speed 1

1 Louver [None]

2

2 Louver [Equipped]

1

No definition (Vane [None])

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

3 Vane [None]

4

1

2 Cool/ Dry/ Fan

3

4

044 045046 047 048 049 050051 052 053 054 055 056057 058 059060 061 062063 064 065066 067 068069 070 071 072 073074 075 076 077 078 079080 081 082083 084 085 086

Cool/ Automatic/ Fan/ Heat

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

1 Speed 4

2 Speed 3

3 Speed 2

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

4 Speed 1

1 Louver [None]

2 Louver [Equipped]

1

2

No definition (Vane [None])

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

3 Vane [None]

4

1

2 Cool/ Dry/ Fan

3

4

Cool/ Automatic/ Fan/ Heat

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

List of function for all the models [Wireless remote controller]

1.Fan

speed

2.Vertical

vane

3.Horizon

tal vane

4.Operati

on mode

73

1.Fan

speed

2.Vertical

vane

3.Horizon

tal vane

4.Operati

on mode

087 088089 090 091 092 093094 095 096 097 098 099100 101 102103 104 105106 107 108109 110 111 112 113 114 115 116 117 118 119 120121 122 123 124125 126127 128 129

Model No.

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

No definition (Vane [None])

1 Speed 4

2 Speed 3

3 Speed 2

4 Speed 1

1 Louver [None]

2 Louver [Equipped]

1

2

3 Vane [None]

4

List of function for all the models

1.Fan

speed

2.Vertical

vane

3.Horizon

tal vane

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

Cool/ Automatic/ Fan/ Heat

1

2 Cool/ Dry/ Fan

3

4

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

4.Operati

on mode

74

130 131132 133 134 135 136137 138 139 140 141 142143 144 145146 147 148149 150 151152 153 154 155 156157 158 159160 161 162163 164 165166 167 168 169 170171 172

1 Speed 4

1.Fan

2 Speed 3

3 Speed 2

4 Speed 1

speed

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

No definition (Vane [None])

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

Cool/ Automatic/ Fan/ Heat

1 Louver [None]

2 Louver [Equipped]

1

2

3 Vane [None]

4

1

2 Cool/ Dry/ Fan

3

4

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

2.Vertical

vane

3.Horizon

tal vane

4.Operati

on mode

173 174175 176 177 178 179180 181 182 183 184 185186 187 188189 190 191192 193 194195 196 197198 199 200 201 202203 204 205 206 207 208209 210 211 212 213 214 215

Model No.

1 Speed 4

2 Speed 3

3 Speed 2

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

4 Speed 1

1 Louver [None]

2

2 Louver [Equipped]

1

No definition (Vane [None])

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

3 Vane [None]

4

1

2 Cool/ Dry/ Fan

3

4

216 217218 219 220 221 222223 224 225 226 227 228229 230 231232 233 234235 236 237238 239 240241 242 243 244 245246 247 248 249 250 251252 253 254255 256

Cool/ Automatic/ Fan/ Heat

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

1 Speed 4

2 Speed 3

3 Speed 2

Vane [Equipped]/ Swing function [Equipped]

Vane [Equipped]/ Swing function [None]

4 Speed 1

1 Louver [None]

2 Louver [Equipped]

1

2

No definition (Vane [None])

Cool/ Dry/ Automatic/ Fan/ Heat

Cool/ Dry/ Automatic/ Heat

Cool/ Dry/ Automatic/ Fan/ Burner-used heat/ Heat

3 Vane [None]

4

1

2 Cool/ Dry/ Fan

3

4

Cool/ Automatic/ Fan/ Heat

5 Cool/ Fan

6

7 Cool/ Fan/ Heat

8 Cool/ Dry/ Fan/ Heat

List of function for all the models

1.Fan

speed

2.Vertical

vane

3.Horizon

tal vane

4.Operati

on mode

75

1.Fan

speed

2.Vertical

vane

3.Horizon

tal vane

4.Operati

on mode

Wireless remote controller pair number:
Setting operation

1. Press the SET button (using a pointed implement).
Check that the remote controller's display has stopped
before continuing.
MODEL SELECT flashes, and the model No. (3 digits)
appears (steadily-lit).

2. Press the MINUTE button twice.
The pair number appears flashing.

3. Press the temperature buttons to select the pair
number to set.

4. Press the SET button (using a pointed implement).
The set pair number is displayed (steadily-lit) for 3
seconds, then disappears.

SET button

MODEL SELECT

ON/OFF

MODE

CHECK

TEST RUN

SET

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

h

min

Pair No.

Model No.

Temperature
button

Minute
button

76

11

TEST RUN • REPLACEMENT OPERATION & EMERGENCY OPERATION

11-1. Test run • replacement operation

11-1-1. Check points

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant
leakage, loosened connections and wrong polarity.

• Check if there is no phase interruption to the power supply.

• Measure impedance between the ground and the terminal block(L, N) of the outdoor power board by 500V Merger and
check that it is 1.0MΩ or more. If the indoor unit is equipped with a heater, also check the terminal block(L, N) of the heater
power board.

w Don’t use 500V Merger to the indoor/outdoor connecting wire terminal block(S1, S2, S3) and the remote controller terminal

block(1, 2). This may cause a malfunction.

Insulation Resistance

• The insulation resistance may get down to around 1.0MΩ as the liquid refrigerant collects in the compressor right after the

installation of units or if the units are left for a long time with the main power OFF. In that case, there is no abnormality on
units. Follow the procedure below.

1 Measure the insulation resistance of the compressor itself by disconnecting any wires from it.
2 It is considered that the insulation resistance will get down due to the collected refrigerant in the compressor or the

defective compressor when the insulation resistance is below 1.0MΩ.

3 Start warming up the compressor by turning on the main power supply after connecting all the wires to the compressor

again. Measure the insulation resistance again after supplying electricity to the compressor during the time indicated below.
a) Warming-up time needed to get the insulation resistance back to 1.0MΩ or more from the insulation resistance decline:

2 to 3 hours (More time may be needed due to the outside temperature conditions or the refrigerant collected conditions.)

b) Warming-up time needed to prevent the compressor from failure when the compressor is started with some refrigerant

collected in compressor: 12 hours or more

4 If the insulation resistance is back to 1.0MΩ or more, the compressor is not defective.

• Make sure that the test run switch (SW4) on the outdoor controller board is set to OFF before turning on the power supply.

• Turn on the power supply 12 hours before operation in order to protect the compressor.

• For specific models which require higher ceiling settings or auto-recovery feature from power failure, make proper changes
on settings by referring to the description of “Selection of Function through Remote Controller”.

• Check if there is something wrong with the outdoor unit. LED1 & LED2 on the outdoor controller board flashes if the outdoor
unit is in a trouble.

• Open both the stop valve of liquid/gas pipes completely.

• The surface of DIP switch is covered with the protection sheet. Uncover the protection sheet to make the switch controlled
more easily.

After checking the above points, conduct the test run by following the procedure written in the below section. Make sure to
read the operation manual before the test run. (Especially items to secure safety.)

11-1-2. Replacement operation

• When reusing the existing pipes that carried R22 refrigerant for the RP4, RP5 and RP6 models, replacement
operation must be performed before performing a test run.

1 If new pipes are used, these procedures are not necessary.
2 If existing pipes that carried R22 refrigerant are used for the RP3 model, these procedures are not necessary.

(The replacement operation cannot be performed.)

3 During replacement operation, “C5” is displayed on “A-Control Service Tool(PAC-SK52ST)”. (This is applied to only RP4,

RP5 and RP6 models.)

• Replacement operation procedures

1 Turn on the power supply.
2 Set DIP switch SW8-2 on the outdoor controller board to ON to start replacement operation.

• The replacement operation is performed using the cooling system. Cool air will flow from the indoor unit during the replace­ment operation.

• During the replacement operation, is displayed on the remote controller and LED1 (green) and LED2 (red) on the
control board of the outdoor unit flash together.

3 Replacement operation requires at least two hours to complete.

• After setting switch SW8-2 to ON, the unit automatically stops after two hours.

• Replacement operation can be performed repeatedly by setting switch SW8-2 from OFF to ON. Make sure to perform the

operation more than 2 hours. (If the operation is performed less than 2 hours, the existing pipes cannot be cleaned
enough and the unit may be damaged.)

• If replacement operation is performed over 2 hours, this action is recorded into nonvolatile memory of controller board.

4 Set switch SW8-2 to OFF. (Replacement operation is completed.)

wThe unit can be operated normally by remote controller even if SW8-2 remains ON.
wIf the indoor temperature is less than 15:, the compressor will operate intermittently but the unit is not faulty.

TEST RUN

77

11-2. Before test run

After installation of indoor and outdoor units, and piping
and electric wiring work, re-check that the unit is free
from leaks of refrigerant, loosened connections, and
incorrect polarity.

Measure and impedance between the power supply ter­minal block on the outdoor unit and the ground with a
500V Merger and check that it is equal to or greater than

1.0MΩ.
For the heater integrated units, make the similar mea­surement on the heater power supply terminal block (L,
N, ).

(*) Never apply any voltage to the both terminal blocks

for the indoor and outdoor unit connection (S1, S2,
S3) and the remote controller (1,2).

For specific models requiring changing of settings for
higher ceilings or selection of power supply ON/OFF
capability, make proper changes referring to the descrip­tion for Selection of Functions through Remote
Controller.

3

STAND BY
DEFROST

PAR-20MAA

CENTRALLY CONTROLLED

CLOCK

CHECK

˚C

TEMP.

TIMER SET

ON OFF

ERROR CODE

1Hr.

NOT AVAILABLE

˚C

FILTER

CHECK MODE

TEST RUN
FUNCTION

ON/OFF

FILTER

CHECK TEST

A

6

2
4

11-3. Test run procedures

(1) Indoor unit

Wired type

Operating procedures
1 Turn on the main power supply.

While the room temperature display on the remote controller
reads “H0”, the remote controller is disabled. Turn off the
“Ho” display before using the remote controller.

2 Press “TEST RUN” button twice.

A the ‘TEST RUN’ indicator should light up.

3 Press button.

Cool in/drying mode: Cool air should start to blow.
Heating mode: Warm air should start to blow (after a while).

4 Press button.

Check for correct motion of auto-vanes.

5 Check the outdoor unit fan for correct running.

The outdoor unit features automatic capacity control to
provide optimum fan speeds. The fan keeps running at a
low speed to meet the current outside air condition unless
it exceeds its available maximum power. Then, in actuality,
the fan may stop or run in the reverse direction depending
on the outside air, which does not mean malfunction.

6 Press the “ON/OFF” button to reset the test run in

progress.

• The test run will be automatically shut down after two
hours in response to the AUTO STOP setting of two hours
on the timer.

• During the test run, the room temperature display shows
the indoor unit tubing temperatures.

• In the case of the test run, the OFF timer will activate, and the test run will automatically stop after two hours.

• The room temperature display section shows the pipe temperature for indoor units during the test run.

• Check that all the indoor units are running properly for simultaneous twin and triple operation.
Malfunctions may not be displayed even if the wiring is incorrect.

(*1)
After turning ON the power supply, the system will go into start up mode and “ H0” will be blinked on the operation lamp of the
remote controller (green) and the display section of the room temperature .
As to INDOOR BOARD LED , LED1 and LED2 will be lit up (In case the address is 0.) or turned off (In case the address is not

0.) and LED3 will be blinked.

As to OUTDOOR BOARD LED , LED1(green) and LED2(red) will be lit up.(After the startup mode of the system will be
finished ,LED2(red) will be turned off.)
In case OUTDOOR BOARD LED is the digital display, — and — will be displayed alternately every second.

• If one of the above operations does not function correctly, the following causes should be considered, and if applicable, dealt
with. (The following symptoms have been determined under test run mode. Note that “start up” in the chart means the *1 dis­play above.)

78

Symptoms

LCD

Nonconformity Content

P1
P2
P4
P5
P6
P8
P9

Abnormality of room temperature thermistor (TH1).
Abnormality of pipe temperature thermistor/Liquid (TH2)
Abnormality of drain sensor (DS)
Malfunction of drain-up machine
Freezing/overheating protection is working
Abnormality of pipe temperature
Abnormality of pipe temperatuer thermistor/Cond./Eva. (TH5)

LCD

Nonconformity Content

E0~E5
E6~EF
U0~UL

F1~F9

----

FFFF

Abnormality of the signal transmission between remote
controller and indoor unit.
Abnormality of the signal transmission between indoor unit and
outdoor unit.
Abnormality in outdoor unit.
Abnormality in outdoor unit.
No trouble generated in the past.
No corresponding unit.

LED 1 (microcomputer power supply)
LED 2 (remote controller feed)

LED 3 (indoor and outdoor signals)

Displays the ON/OFF of power for control. Check that this is lit during normal use.
Displays the ON/OFF of feed to wired remote controller. Is only lit for indoor unit linked to outdoor
unit with address "00".
Displays signal between indoor and outdoor units. Check that this is flashing during normal use.

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

TEST RUN

RESET

SET

CLOCK

7

5

6

2

3,4

MODE

MODE

COOL

HEAT

TEST RUN

FAN

VANE

TEST RUN

Remote Controller Display

Remote controller is displaying "H0", and
operation is not possible.
After power is turned ON, "H0" is displayed
for 3 mins., then error code is displayed.

Display messages do not appear even
when remote controller operation switch is
turned ON (operation lamp does not light
up).

OUTDOOR BOARD LED Display Cause

In case of digital display, < > is displayed.

After "startup" is displayed,
only green is lit up. < 00 >
After "startup" is displayed, the
green(once) and red(once) are
blinked alternately. <F1>
After "startup" is displayed, the
green(once) and red(twice) are

• After power is turned ON, system startup lasts for about 2
mins., and "H0" is displayed (correct operation).

• Outdoor unit`s safeguard installation connector is open.

• Negative phase and open phase of outdoor unit`s power
terminal board (Single phase: L,N )

• Incorrect connection of outdoor terminal board (Single phase:
L,N grounding and S1,S2,S3)

blinked alternately. <F3,F5,F9>
After "startup" is displayed, the
green(twice) and red(once) are
blinked althernately. <EA,Eb>
After "startup" is displayed,
only green is lit up. < 00 >

• Wiring for the indoor and outdoor unit is not connected
correctly. (Polarity is wrong for S1,S2,S3)

• Remote controller transmission wire short

•There is no outdoor unit for address 0 (address is something
other than 0).

• Remote controller transmission wire burnout

Operation display appears but soon
disappears even when remote controller
operations are executed.

* Press the remote controller`s “CHECK” button twice consecutively to be able to run a self diagnosis. See the chart below for content of

error code displays.

See the chart below for details of the LED displays (LED 1,2,3) on the indoor substrate.

After "startup" is displayed,
only green is lit up. < 00 >

• After cancellation of function selection, operation is not
possible for about 30 secs. (correct operation).

Test run [for wireless remote controller]

Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500V Megger and check that it is
equal to or greater than 1.0M".

1 Turn on the main power to the unit.
2 Press the button twice continuously.

(Start this operation from the status of remote controller display
turned off.)
A and current operation mode are displayed.

3 Press the ( ) button to activate mode, then

check whether cool air is blown out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air is blown out from the unit.

5 Press the button and check whether strong air is blown out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

7 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver
while following steps 22to 77.

• It is not possible to run the in FAN, DRY or AUTO mode.

79

(2) Outdoor Unit

ON

SW4

12

A Stop
B Cooling
C Operation
D Heating

A

CD

B

(Factory setting)

Test run by outdoor unit SW4

The setting of test run (ON/OFF) and its operation mode (cooling/heating) can be set by SW4 on the controller board of out­door unit. Check that SW5-1 is set to OFF before performing test run. If SW5-1 is set to ON, turn it OFF and then perform test
run. After finishing test run, set SW5-1 back to ON.

1Set operation mode(cooling or heating) by SW4-2.
2Start test run by setting SW4-1 to ON ( ) with the indicated operation mode of SW4-2.
3Finish test run by setting SW4-1 to OFF ( ).

• Operation mode cannot be changed by SW4-2 during test run.
Stop test run to change operation mode by SW4-1, and restart test run by SW4-1 after

the mode is changed.

• Test run automatically stops 2 hours later by 2-hour OFF timer function.

• Test run can be performed by the remote controller.

• The remote controller display of test run by outdoor unit is the same as that of test run by

remote controller.

• There may be a small clicking sound near the compressor after power is supplied, but this is not a malfunction. The linear

expansion valve is working in order to adjust its opening pulse.

• There may be a clanging sound near the compressor for a couple of seconds after the compressor gets started, but this is

not a malfunction. The valving element of the check valve emits this sound because the pressure difference in pipes is small.

ww

Operation mode cannot be changed by SW4-2 during test run.

(If it’s necessary to change the operation mode, stop the test run by SW4-1. Then restart the test run by SW4-1

after changing the operation mode.)

11-4. Emergency Operation

(1) Indoor unit

1. When the wired remote controller or indoor unit micro computer troubles if there is not any other wrong, emergency opera­tion starts as the indoor control board switch (SWE) is set to ON.
During the emergency operation the indoor unit is as follows;
(1) Indoor fan high speed operation (2) Drain pump. (only provided model)

w When the remote controller cannot be used for the wireless remote controller, emergency operation is available by

operating the emergency operation switch (SW1/SW2 in the wireless remote controller receiving p.c/board) in the
indoor unit.

2. When emergency operating for COOL or HEAT, setting of the switch (SWE) in the indoor control board and outdoor unit
emergency operation are necessary.

3. Check items and notices as the emergency operation

(1) Emergency operation cannot be used as follows;

• When the outdoor unit is something wrong.

• When the indoor fan is something wrong.

• When drain over flow protected operation is detected during self-diagnosis. (optional drain up mach.)

(2) Emergency operation will be serial operation by the power supply ON/OFF.

ON/OFF or temperature, etc. adjustment is not operated by the remote controller.

(3) Do not operate for a long time as cold air is blown when the outdoor unit starts defrosting operation during heat

emergency operation.
(4) Cool emergency operation must be within 10 hours at most. It may cause heat exchanger frosting in the indoor unit.
(5) After completing the emergency operation, return the switch setting, etc. in former state.
(6) As for PLA-RP·AAType series, since vane does not work at emergency operation position the vane manually and slowly.

80

(2) Outdoor unit

SW4

1 2 Cooling

Heating

ON

ON

OFF

CN31

Shorting pins

SW4

1 2 Cooling

Heating

ON

Inspected content
Open/short of pipe thermistor (TH3/TH6)
Indoor/outdoor unit communication error •Signal receiving error (Outdoor unit)
Indoor/outdoor unit communication error •Transmitting error (Indoor unit)
Communication error other than outdoor unit
Communicaiton error between outdoor controller board and M-NET board (Serial communication error)

Error code

U4
E8
E9

E0 ~ E7

Ed

●When following abnormalities occur, emergency operation will be available.

1. When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor
unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency
operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

2. Check the following items and cautions for emergency operation
1Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will

not be available when error code other than the above are indicated.)

2For emergency operation, it is necessary to set the emergency operation switch (SWE) on indoor controller board. Refer

to the electrical wiring diagram of indoor unit for how to set the indoor unit.)

3During emergency operation, the air-conditioner will continuously be operated by supplying power and stopping it: It can

not be turned on or off by remote control, and temperature control is not possible.

4Do not perform emergency heating operation for an extended period of time: If the outdoor unit starts defrosting during

this period, cold air will blow out from the indoor unit.

5Do not perform emergency cooling operation for more than 10 hours: Neglecting this could result in freezing the heat

exchanger in indoor unit.

3. Emergency operation procedure

1Turn the main power supply off.
2Turn on the emergency operation switch (SWE) on indoor controller board.
3Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON.
4Use SW4-2 on outdoor controller board to set the operation mode (cooling or heating). (SW4-1 is not used.)

5Turning the main power supply on will start the emergency operation.

4. Releasing emergency operation

1Turn the main power supply off.
2Set the emergency operation switch (SWE) on indoor controller board to OFF.
3Set the shorting pins of emergency operation connector (CN31) on outdoor controller

board to OFF.

4Set SW4-2 on outdoor controller board as shown in the right.

wIf shorting pins are not set on emergency operation connector (CN31), the setting remains OFF.

81

(3) Operation data during emergency operation

Operation data

Intake temperature (TH1)
Indoor fluid pipe temperature (TH2)
Indoor 2-phase pipe temperature (TH5)
Set temperature
Outdoor fluid pipe temperature (TH3)
Outdoor discharge pipe temperature (TH4)
Outdoor 2-phase pipe temperature (TH6)
Outdoor air temperature (TH7)
Temperature difference code (intake temperature - set temperature) (∆Tj)
Discharge super heat (SHd)
Sub-cool (SC)

Operation mode

COOL

27:

5:

5:
25:
45:
80:
50:
35:

5

30deg

5deg

HEAT

20.5:
45:
50:
22:

5:

80:

5:
7:

5

30deg

5deg

(w1)
(w1)
(w1)
(w1)

(w2)
(w2)

Remarks

w1: If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.

If the unit enters emergency operation because TH values have become mismatched, setting the thermistors
to open/short corrects the settings.

w2: If one thermistor is set to open/short, the values for each will be different.

[Example] When liquid temperature thermistor (TH3) has an open or short circuit.

COOL

45:

Ta

Tc

5:
5:

HEAT

5:

Tb

Td

50:
45:

Thermistor

TH3

TH6

TH4

TH5
TH2

Regard normal firure as effective data.

Regard normal firure as effective data.

Discharge superheat (SHd)
Cooling = TH4 - TH6 = Tc - Ta
Heating = TH4 - TH5 = Td - 50

Degree of subcooling (SC)
Cooling = TH6- TH3 = Ta -45
Heating = TH5- TH2 = 50 - 45 = 5 deg.

During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation
are set to the following values:

82

12

Mode number

Setting number

Refrigerant address

Unit number

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN
FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY
DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

E
G

CD H

F

I
A

B

J

1

2

a)

3(1)

c)

b)

d)

e)

SELF-DIAGNOSIS

12-1. Malfunction-diagnosis method by remote controller

12-1-1. Error history of unit
(1) Wired remote controller

<In case of trouble during operation>

If there is a trouble on air conditioner, both indoor unit and out­door unit will stop and digital display shows what was wrong.

1 “CHECK” and refrigerant address are displayed at set tem-

perature display. Error code and unit number are displayed
at clock display alternately.
(If outdoor unit is malfunctioning, unit number is 00.)

2 The refrigerant address and error code initially sent from

the unit are displayed in case of group control system which
one remote controller controls plural refrigerant systems.

3 Press the “ON/OFF” button to cancel error code.

In case of central control by the controller of MELANS, cancel
the error code by the controller of the MELANS, and in case
of distant-handy combined operation, cancel the error code by
canceling distant operation.

<Malfunction-diagnosis method at maintenance service>

Digital control has memory function that memorizes latest
error code even if it is cancelled by remote controller or power
is shut off, so error histories can be searched by following the
procedure below.

Search error histories of each unit by remote controller.

1 Turn to self-diagnosis mode.

Press the H “CHECK” button twice within three seconds,
and following display appears.

a) Refrigerant address for self-diagnosis

2 Set refrigerant address number that you want to diagnose.

Press the F (temp.) button to set refrigerant address
to be diagnosed.
Refrigerant address has number from 00 to 15.
Three seconds after setting, lighted self-diagnosed refriger­ant address begins blinking and self-diagnosis process
begins.

3 Self-diagnosis result display

(1) When there is an error history. (Refer to page 97 to 108

for details of error code contents.)
b) Alternating display
c) Error code
d) Attribute of error search
e) Unit number

(2) When there is no error history.
(3) When the address does not exist.

83

(2)

(3)

5 (1)

(2)

b)

4 To cancel self-diagnosis

There are following two methods to cancel self-diagnosis:
Press the H “CHECK” button twice within three seconds.
➜Self-diagnosis is cancelled and the display screen will
return to the status before self-diagnosis.
Press the I “ON/OFF” button.
➜Self-diagnosis is cancelled and indoor unit will stop.
This operation is ineffectual when the operation of remote
controller is prohibited.
During self-diagnosis at maintenance service, all the indoor
units start performing fan operation except for the indoor
unit indicating the latest error. Then outdoor units of the
same refrigerant system also start performing fan operation

intermittently for 3 minutes. (The fan is on for 3 seconds

and then off for 5 seconds.)

The unit with error can be inspected by using this. In case
unit other than indoor unit, such as outdoor unit and con­troller of MELANS, has an error, all the indoor units of the
same refrigerant system stop fan operation and outdoor
units operate intermittently for 3 minutes.

5 To delete error code

When something is wrong with air conditioner, error code
(P1 etc.) is memorized, but error code can be deleted after
termination of service.

(3)

<To delete error cord with remote controller>

(1)Display the error cord at the self-diagnosis result display

screen.

b) Alternating display

(2)The address for self-diagnosis will blink when the D

w button is pressed twice within three seconds.

(3) The display (3) shown on the left will be appeared when

the error cord has been reset. Note that the error content
will be redisplayed if error cord resetting is unsuccessful.

<To delete error cord with switch of outdoor unit>

Refer to 9-2-1. Function of switches on page 55.

84

Inspected unit

Error code

P1
P2
P4
P5
P6
P8
P9

E4, E5

Beep output

beep O 1 time
beep O 2 times
beep O 4 times
beep O 5 times
beep O 6 times
beep O 8 times
beep O 2 times

Other than above

Operation LED
1 sec. O 1 time
1 sec.O 2 times
1 sec.O 4 times
1 sec.O 5 times
1 sec.O 6 times
1 sec.O 8 times
1 sec.O 2 times
Other than above

Indoor unit

Inspected unit

Check code

F1–F9
U0–UP
E6–EE

No check code

(normal)

Beep output

beep beep O 1 time

Other than above

No output

beep beep beep

Operation LED
(0.4sec+0.4sec)

O 1 time

Other than above

Lights off

Lights off

Outdoor

unit

No check code
(mistake of match­ing with refrigerant

address)

(2) Digital wireless remote controller

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

RESET

SET

CLOCK

CHECK

CHECK
display

Temperature
button

CHECK
button

Refrigerant
address
display

HOUR
button

ON/OFF
button

<In case of trouble during operation>

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.

<Malfunction-diagnosis method at maintenance service>

[Procedure]

1. Press the CHECK button twice.

• "CHECK" lights, and refrigerant
address "00" flashes.

• Check that the remote controller's
display has stopped before continuing.

2. Press the temperature
buttons.

• Select the refrigerant address of the
indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

outdoor unit’s DIP switch (SW1).
(For more information, see the
outdoor unit installation manual.)

3. Point the remote controller at the
sensor on the indoor unit and
press the HOUR button.

• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit­tent buzzer sound, the operation light
flashes, and the error code is
output.
(It takes 3 seconds at most for error
code to appear.)

4. Point the remote controller at the

• The check mode is canceled.

sensor on the indoor unit and
press the ON/OFF button.

✽ Malfunction diagnosis can be performed only for refrigerant system control-

ling wireless units.

85

12-1-2. Wired Remote controller Diagnosis

If operation can not be carried out from remote controller, try
remote controller diagnosis with following process.

1

a)

1 First, check the electricity current marker.

When correct voltage (DC12V) is not supplied to remote
controller, the electricity current marker is put out.
If the electricity current marker is not lighted, check the
remote controller wiring and the indoor units.

a) Electric current marker

2

3(1)

(2)

(3)

(4)

b)

2 Transfer to remote controller diagnosis mode

Hold down the H “CHECK” button for five seconds or more,
and following display appears.

Press the A “FILTER” button, and remote controller diagno­sis will begin.

3 Remote controller diagnosis result

(1) When the remote controller is functioning correctly

Check other possible causes, as there is no problem
with remote controller.
Consider the unit is normal when remote controller trans­mits the result of diagnosis to indoor or outdoor unit and
receives the same data back.

(2) When remote controller has malfunction

The remote controller must be replaced.
If the transmitting-receiving circuit is deffective, [‘NG’]
blinks.
"NG" will be displayed when remote controller transmits
the result of diagnosis to indoor or outdoor unit, and
receives no response.

When there might be other problems than diagnosed remote
controller,

(3) There might be noise on transmission path or damage of

other remote controllers or indoor units. Check the trans-

mission path and other controllers.
If the transmission is not possible, [E3] blinks.
"E3" will be displayed when remote controller transmits
the result of diagnosis to indoor or outdoor unit and
receives different data back.

(4) The number of data errors means the difference

between the number of bits sent from remote controller

and the actual number of bits sent to transmission path.

If the data error is displayed, noise and etc. are interfer-

ing with the transmission data. Check the transmission

path.
If the data error has occurred, [ERC] and number of data
errors are displayed.

b) Number of generated data errors (maximum 66 errors)

When the number of data errors is 02.
Transmission data from remote controller
Transmission data on transmission path

4 Cancel the remote controller diagnosis

Hold down the H “CHECK” button for five seconds or more
to cancel remote controller diagnosis, then [H0] operation
lamp will blink and the display screen will return to the sta­tus before remote controller diagnosis in about 30 seconds.

86

12-2. Trouble shooting by inferior phenomena

Phenomena Factor Countermeasure

(1)Remote controller display does not

work.
(Electric current marker “ ” is not
displayed on the remote controller.)

Indoor control p.c.board LED

LED1

off off off

1

Lighting off

2

Lighting

3

(2)Remaining “H0” display on the

remote controller.

LED2 LED3

(or blinking)

Blinking

(or lighting)

off

–

1Main power is not turned on. (Power supply inferior)
2Mis-wiring, breaking or contact failure of the

1Refrigerant address excepts “0”.
2Mis-wiring, breaking or contact failure of the

1Short circuit, miswiring and breaking

1At longest 2 minutes after the power supply “H0” is

Reference (Meaning of the indoor control board LED)

LED1 : Micro computer power supply

....Display of DC14V is supply or not from indoor power.

LED2 : Power output supplied to remote controller

....Display the power condition supplied to wired remote controller. When the

refrigerant address is “0” supplied power output ON.

LED3 : Indoor outdoor communication monitor

....Blinking, when receiving the signal normally from the outdoor unit.

connecting line.

connecting line.

displayed to start up.

1

Check the power wiring to the outdoor unit and the breaker.

2

Check for incorrect wiring, wiring breaks and poor
connections between the indoor and outdoor units.
(Refer to page 90.)

1

Set the refrigerant address to "0" (only 1 refrigerant can be
"0" for group control).

2

Check for incorrect wiring, wiring breaks and poor
connections between the indoor and outdoor units.
(Refer to page 91.)

1

Check for shorts, incorrect wiring and wiring breaks in the
remote controller wires.

2

Replace the remote controller if the voltage to the remote
controller terminal block (TB6) is between 10 and 16V DC.
(Refer to page 92.)

Normal operation

(3)When pressing the remote controller

operation switch the OPERATION
display is appeared but it will be
turned off soon.

(4)Even controlling by the wireless

remote controller no beep and not
working. (Display is available on the
wireless remote controller)

(5)When operating by the wireless

remote controller, beep sound is
heard without working.

(6)Upward/downward vane perfor-

mance fault.

1Communication fault between the remote controller

and indoor.

2Communication fault between the indoor and outdoor.
3Outdoor unit protection device is opened.

(Abnormal code will be displayed after 2~6 minutes.)

1After cancelling to select function from the remote

controller, the remote controller operation switch will
be not accepted for approx 30 seconds.

1The pair number settings of the wireless remote

controller and indoor control PCB are mismatched.

2Disconnecting of wireless receiving board and contact

failure.

3Factor of the above (1).

1No operation for max. 2 minutes after the power sup-

ply ON.

2Remote operation is prohibited.

•Remote controlling adaptor is connected to the
indoor control board (CN32).

•Remote operation is prohibited by centralised con­troller etc. since it is connected to MELANS.

3Factor of the above (2).

1When the unit is as follows in the HEAT mode, the

vane is not downward.
(Working of COOL protection function)

•During HEAT preparation.

•During defrosting.

•During compressor stop.

2When setting the downward vane in the cool/dry

mode, the vane changes to Horizontal position after 1
hour.

3Vane motor does mot rotate.

A) Vane motor fault.
B) Disconnecting, breaking and contact fault of the

connector.

C) Setting to no vane unit.

Turn the power supply OFF/ON, and check the following:

1

If an error is displayed on the remote controller or outdoor
unit's LED within 6 minutes:
Refer to the self-diagnosis table on p. 101 to take
appropriate action.

2

If "H0" display remains for 6 minutes:
Failure in indoor control PCB or remote controller
(Refer to page 89.)

Normal operation

1Check the pair number settings.
2Check the indoor control board connector

(CN90).
Check the wireless receiving board con­nector (CNB)

3Check the details of above (1).

1Normal operation
2Normal operation

3Check the details of above (2).

1Normal operation
2Normal operation

3 A) Vane motor resistance value check.

Refer to “5, HOW TO CHECK THE
PAR TS”.

B) Disconnecting, breaking, and contact

fault of the connector.
Stepping motor adopting model

.... CN6V check

AC timing motor adopting model

.... CNV check

C) Check the setting details by selecting

the remote controller function.
Setting check of the indoor control
board J11~J15 (SW1).

87

Phenomena Factor Countermeasure

(7)Though the remote controller dis-

play is normal in cool mode, the
capacity is not enough.

(8)Though the remote controller dis-

play is normal in Heat mode, the
capacity is not enough.

1Filter clogging (dirt)

2Heat exchanger clogging (dirt)

3Air duct short cycle.
4Refrigerant shortage.
5Operation failure in linear expansion valve

6Thermistor connection failure
7Incorrect piping size
8Piping is too long.

1Filter clogging (dirt)

2Heat exchanger clogging (dirt)

3Air duct short cycle.
4Refrigerant shortage.
5Outdoor unit bypass circuit failure
6Indoor reverse check valve failure

Reverse check valve failure may cause refrigerant
leakage and restrictor failure.

7Heat insulator of refrigerant pipes is defective.
8Malfunction of LEV.
9Loose connection in thermistor.

1Open the grille to check the filter.

Clean the filter and remove dust or dirt
away.

2Clean the heat exchanger.

Lowering the indoor piping temperature
and intake pressure means clogging in the
heat exchanger.

3Remove screen in the air duct (air outlet/

intake).

4Check if gas leaks or not in the piping

joint.

5,6Check the refrigerant circuit operation

status.

7Check the piping size.
8Check the capacity loss characteristic for

the piping length.

1Open the grille to check the filter.

Clean the filter and remove dust or dirt
away.

2Clean the heat exchanger.

Rising the indoor piping temperature and
outlet pressure means clogging in the heat
exchanger.

3Remove screen in the air duct (air outlet/

intake).

4Check if gas leaks or not in the piping

joint.

5Operating condition check in the refriger-

ant cycle.

6Since outlet temperature and indoor heat

exchanger temperature does not rise,
measure the outlet pressure and deter­mine the countermeasure.

7Check the heat insulator.
8,9Check the function of refrigerant circuit.

(9)Operation failure of the outdoor fan

(Fan does not rotate.)

1 Defective outdoor fan motor

(Short or open of the winding)

2 Defective outdoor fan motor

(Rotating-position detecting circuit built in the motor

does not output any signals.)

3 Defective outdoor controller board

1 Check the resistance of winding.

Refer to “5, HOW TO CHECK THE PARTS”.

2 First of all, check the voltage of FAN12

and FAN22 on the outdoor controller
board. Check the voltage between pin
1 and 5, between pin 2 and 5, between
pin 3 and 5. If any of them does not
repeat the pattern “0V ➔ 5V ➔ 0V”, the
rotating-position detecting circuit is defective.
Replace the outdoor fan motor.
Second of all, make sure the voltage
between pin 4 and 5 is always 5VI 0.2V.
If not, replace the outdoor controller board
and recheck the voltage.

3 Replace the outdoor controller board.

88

Symptoms: “HO” is kept being displayed on the remote controller.

Diagnosis flow Cause

Check the display time of “H0”
after turning on the main power.

6 minutes
or more

Check the LED display of the
outdoor controller circuit board.

kept being displayed on the

How long is “H0”

remote controller?

2 to 6
minutes

Are any error codes

displayed on the

remote controller?

YES

2 minutes
or less

NO

“H0” will be displayed

•
during the start-up

diagnosis after turning

on the main power.

Inspection method and
troubleshooting

• Normal.
The start-up diagnosis will

be over in around 2 minutes.

Are any error codes

displayed on the LED?

NO

YES

• Mis-wiring of indoor/
outdoor connecting
wire

• Breaking of indoor/
outdoor connecting
wire (S3)

• Defective indoor
controller board

• Defective outdoor
controller circuit
board

• Defective indoor
controller board

• Defective remote
controller

• Refer to “Self-diagnosis
action table” in order to
solve the trouble.

• In case of communication
errors, the display of
remote controller may not
match the LED display of
the outdoor unit.

89

Symptoms: Nothing is displayed on the remote controller 1

LED display of the indoor
controller board
LED1 :
LED2 :
LED3 :

Diagnosis flow Cause

Check the voltage between S1
and S2 on the terminal block
(TB4) of the indoor unit which
is used to connect the indoor
unit and the outdoor unit.

AC 198V to AC 264V?

YES

NO

Check the voltage among R, S and
T on the terminal block (TB1) of the
outdoor power circuit board.

AC 198V to AC 264V?

NO

YES

Check the voltage between S1
and S2 on the terminal block
(TB1) of the outdoor unit which
is used to connect the indoor
unit and the outdoor unit.

•

Troubles concerning

power supply.

Inspection method and
troubleshooting

• Check the power wiring
to the outdoor unit.

• Check the breaker.

Check the voltage of indoor
controller board (CN2D).
Refer to page 110 and 111.

DC 12V to DC 16V?

YES

NO

Check the voltage of the unit after
removing the indoor power board
(CN2S).
Refer to page 109.

DC 12V to DC 16V?

YES

NO

AC 198V to AC 264V?

YES

NO

• Bad wiring of the
outdoor controller board.

•

The fuses on the outdoor

controller circuit board are
blown.

(FUSE1, FUSE2)

• Check the wiring of the
outdoor unit.

• Check if the wiring is bad.
Check if the fuses are blown.

The fuses on the outdoor
controller circuit board will
be blown when the indoor
/outdoor connecting wire
short-circuits.
(FUSE1, FUSE2)

• Bad wiring of the
outdoor controller board.

•

The fuses on the outdoor

controller circuit board are
blown.

(FUSE1, FUSE2)

• Defective indoor

controller board

• Mis-wiring, breaking

or poor connection of

• Check if mis-wiring, breaking
or poor contact is causing this

problem. Indoor/outdoor
connecting wire is polarized
3-core type. Connect the
indoor unit and the outdoor
unit by wiring each pair of
S1, S2 and S3 on the both
side of indoor/outdoor
terminal blocks.

• Replace the indoor

controller board.

Check if there is mis-wiring

•

or breaking of wire.
in door/outdoor
connecting wire.

90

• Defective indoor
power board

• Replace the indoor

power board.

AC 198V to AC 264V?

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

Is anything displayed?

DC 17V to DC 28V?

Is “E8” displayed?

Can all the indoor

unit be operated?

Check the voltage between S2
and S3 on the terminal block of
the outdoor unit.

NO

YES

Not lighting.

Blinking.

NO

YES

NO

YES

Not displayed.

Displayed.

YES

NO

YES

NO

Check the voltage between S1 and

S2 on the terminal block (TB4)

of the

indoor unit which is used to connect the indoor unit and the

outdoor unit.

Check the refrigerant address of
the outdoor unit. (SW1-3 to 1-6)

Check the looseness or disconnection
of the indoor/outdoor connecting wire.

Check the LED display of the
outdoor unit after turning on the
main power again.

Can the unit be restarted?

•

Breaking or poor contact
of the indoor/outdoor
connecting wire.

• Fix the breaking or poor
contact of the indoor/outdoor

connecting wire.

• Defective outdoor
controller circuit
board.

• Replace the outdoor

controller circuit board.

• Normal.
Only the unit which
has the refrigerant
address “0” supplies
power to the remote
controller.

• Set the refrigerant

address to “0”. In case of
the multiple grouping
system, recheck the
refrigerant address again.

• Defective indoor
power board.

• Replace the indoor

power board.

• Defective outdoor
power circuit board.

• Replace the outdoor

power circuit board.

• Defective indoor
controller board

•

Replace the indoor controller
board of the indoor unit which

doesn’t operate.

• Defective outdoor
controller circuit
board.

• Replace the outdoor

controller circuit board.

• Influence of
electromagnetic noise.

• Not abnormal.
There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

Symptoms: Nothing is displayed on the remote controller 2

Diagnosis flow Cause

Inspection method and
troubleshooting

LED display of the indoor
controller board
LED1 :
LED2 :
LED3 : or

Check the status
of the indoor controller
board LED3 display.

Is the refrigerant
address “0”?

NO

YES

NO

YES

Is “EA” or “Eb”
displayed?

91

Symptoms: Nothing is displayed on the remote controller 3

LED display of the indoor
controller board
LED1 :
LED2 : or
LED3 : —

Diagnosis flow Cause

Check the voltage of the
terminal block (TB6) of
the remote controller.

DC 10V to DC 16V?

NO

Check the status
of the LED2.

Blinking

Check the status of the LED2
after disconnecting the remote
controller wire from the terminal
block (TB5) of the indoor unit.

YES

Lighting

• Defective
remote controller.

• Breaking or poor
contact of the remote
controller wire.

Inspection method and
troubleshooting

• Replace the
remote controller.

• Check if there is breaking
or poor contact of the
remote controller wire.
Check the voltage of the
terminal block (TB5)
connecting the remote
controller wire.

If it is not between DC 10V
and DC16V, the indoor
controller board must be
defective.

Check the status
of the LED2.

Blinking

Lighting

92

• The remote controller
wire short-circuits.

• Defective indoor
controller board.

• Check if the remote
controller wire is
short-circuited.

• Replace the indoor
controller board.

12-3. Error code list.

Error code

F3

F5
F9

U1
U2
U3

U4

U5
U7
U9
U6
UF

UH

UL

UP

Short 2 beeps (0.4 sec.) x 1

Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1

Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1

Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1
Short 2 beeps (0.4 sec.) x 1

Short 2 beeps (0.4 sec.) x 1

5202

5201

4119

1302

1102
5104
5105
5107
5106

5110
1504
1502
1302
4101
4100
5300
1300

4210

Outdoor

Outdoor
Outdoor

Outdoor
Outdoor
Outdoor

Outdoor

Outdoor
Outdoor
Outdoor
Outdoor
Outdoor
Outdoor
Outdoor

Outdoor

P.100

P.100
P.100

P.102
P.102
P.103
P.103

P.103
P.103
P.104
P.103
P.104
P.104
P.104

P.104

Connector(63L) is open.
<RP4~RP6 only>
Connector(63H) is open.
2 or more connectors are open.
<RP4~RP6 only>
Abnormal high pressure (63H worked)
Abnormal discharging temperature
Open/short circuit of discharging thermistor (TH4)
Open/short circuit of outdoor pipe temperature thermistor/Liquid (TH3)
Open/short circuit of outdoor pipe temperature thermistor/Cond./Eva. (TH6)
Open/short circuit of outside temperature thermistor (TH7)
Open/short circuit of heat sink thermistor (TH8)
Abnormal temperature of heat sink

Abnormality such as overvoltage or voltage shortage
Abnormality of power module

Current sensor error
Abnormal low pressure (63L worked)
<RP4~RP6 only>
Compressor overcurrent interruption

Beep output

High prior
remote controller

Unit which
detects error

Error details

Inspection
method and
troubleshooting

Display of remote
controller or A
control service tool

Abnormality of super heat due to low discharge temperature
(RP3 only)

Compressor overcurrent interruption
(When compressor locked)

Error code

P1
P2
P4
P5

P6

P8
P9

Beep(one sec.) x 1
Beep(one sec.) x 2
Beep(one sec.) x 4
Beep(one sec.) x 5

Beep(one sec.) x 6

Beep(one sec.) x 8
Beep(one sec.) x 2

5101
5102
2503

2500, 2502

1503
1504

1110

5103

Indoor
Indoor
Indoor
Indoor

Indoor

Indoor
Indoor

P.97
P.97
P.97
P.97

P.98

P.98
P.99

Abnormality of room temperature thermistor (TH1)
Abnormality of pipe temperature thermistor/Liquid (TH2)
Abnormality of drain sensor (DS)
Drain overflow protection
Freezing protection in cooling operation
Overheating protection in heating operation
Abnormality of pipe temperature
Abnormality of pipe temperature thermistor/Cond./Eva

Beep output

High prior
remote controller

Unit which
detects error

Error details

Inspection
method and
troubleshooting

Display of remote
controller or A
control service tool

Error codes are explained on the below tables.

w1. When a communication error is occurring, the display of remote controller may not match that of the optional parts

“A control service kit (PAC-SK52ST)”, or may not come on at all.

w2. Beeping sounds come out of the signal receiving section of the wireless remote controller only when the

malfunction-diagnosis is conducted by using the wireless remote controller.

1 Indoor unit error

2 Outdoor unit error

93

3 Remote controller, indoor/outdoor unit transmission error

Error code

E0
E3
E4
E5
E6
E7
E8
E9

EA

Eb

EC

Ed

EF

No beep
No beep
Beep(one sec.) x 9
Beep(one sec.) x 9
Beep(one sec.) x 3
Beep(one sec.) x 3
Short 2 beeps (0.4 sec.) x 3
Short 2 beeps (0.4 sec.) x 3
Short 2 beeps (0.4 sec.) x 2
Short 2 beeps (0.4 sec.) x 2
Short 2 beeps (0.4 sec.) x 2
Short 2 beeps (0.4 sec.) x 4
Beep(one sec.) x 10
Short 2 beeps (0.4 sec.) x 10

No display
No display

6831
3832
6840
6841
6840
6841
6844
6845
6846
0403

6607 or 6608

Remote Controller
Remote Controller

Indoor
Indoor
Indoor

Indoor
Outdoor
Outdoor
Outdoor
Outdoor
Outdoor
Outdoor

Indoor
Outdoor

P.105
P.105

P.99
P.99
P.99

P.99
P.105
P.105
P.101
P.101
P.101
P.105

P.105

Remote controller transmission error (Signal receiving error)
Remote controller transmission error (Transmitting error)
Remote controller transmission error (Signal receiving error)
Remote controller transmission error (Transmitting error)
Indoor/outdoor unit transmission error (Signal receiving error)
Indoor/outdoor unit transmission error (Transmitting error)
Indoor/outdoor unit transmission error (Signal receiving error)
Indoor/outdoor unit transmission error (Transmitting error)

Start-up time over
Serial Transmission error

Not defined.

Beep output

High prior
remote controller

Unit which
detects error

Error details

Inspection
method and
troubleshooting

Display of remote
controller or A
control service tool

Mis-wiring of indoor/outdoor unit connector
(Converse wiring / Disconnection)

Mis-wiring of indoor/outdoor unit connector
The number of indoor unit is over the limit. (Limit: 4 units)

Error code

A0
A2
A3
A6
A7
A8

Short 2 beeps (0.4 sec.) x 4
Short 2 beeps (0.4 sec.) x 4
Short 2 beeps (0.4 sec.) x 4
Short 2 beeps (0.4 sec.) x 4
Short 2 beeps (0.4 sec.) x 4
Short 2 beeps (0.4 sec.) x 4

6600
6602
6603
6606
6607
6608

Outdoor
Outdoor
Outdoor
Outdoor
Outdoor
Outdoor

P.106
P.106
P.106
P.106

P.107,108

P.108

M-NET : Address-duplicated definition
M-NET: Hardware error of transmission P line
M-NET: BUS BUSY
M-NET: Transmission error with transmission P line
M-NET: No ACK
M-NET: No RESPONSE

Beep output

High prior
remote controller

Unit which
detects error

Error details

Inspection
method and
troubleshooting

Display of remote
controller or A
control service tool

4 M-NET transmission error (High Prior)

94

<Display function of inspection for outdoor unit>

F3
F5
F9

—

—

—

E6
E7

—

—

E0
E3
E4
E5

EF

Ed

A0~A8

[Display] (1)Normal condition

(2)Abnormal condition

Unit condition

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

When the power is turned on
When unit stops
When compressor is warming up
When unit operates

Lighted Lighted
Lighted
Lighted

Lighted

Not lighted

Indication of the display

Alternately blinking display

Operation mode

Not lighted

Lighted

00, etc.
08, etc.

C5, H7 etc.

Indication Error

Error
code

w1

Outdoor controller board

Contents Inspection method

LED1 (Green) LED2 (Red)
1 blinking 2 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

Connector(63L) is open.

Connector(63H) is open.

2 connectors are open.

Startup time over

Error code is not defined.

Mis-wiring of indoor/outdoor unit conne­cting wire, excessive number of indoor
units (4 units or more)

Mis-wiring of indoor/outdoor unit co­nnecting wire (converse wiring or di­sconnection)

Indoor/outdoor unit communication error
(signal receiving error) is detected by in­door unit.

Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.

Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.

Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.

Remote controller signal receiving
error is detected by remote controller.

Remote controller transmitting error
is detected by remote controller.

Remote controller signal receiving
error is detected by indoor unit.

Remote controller transmitting error
is detected by indoor unit.

Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
<Communication between outdoor
controller board and M-NET p.c. board>

Communication error of high prior
signal(M-NET)

W1.Remote controller displays error code.

1

Check if indoor/outdoor connecting wire is connected correctly.

2

Check if 4 or more indoor units are connected to outdoor unit.
3Check if noise entered into indoor/outdoor connecting wire
or power supply.

4Re-check error by turning off power, and on again.

1

Check if connector (63L or 63H) on the outdoor controller
board is not disconnected.

2

Check continuity of pressure switch (63L or 63H) by tester.

1

Check if connector (CN4) on outdoor controller board and
outdoor power board is not disconnected.

2

Check if there is poor connection of connector on outdoor
controller board(CNMNT and CNVMNT).

3

Check M-NET communication signal.

1Check if remote controller is MA remote controller(PAR-20MAA).
2Check if noise entered into transmission wire of remote controller.
3Check if noise entered into indoor/outdoor connecting wire.
4Re-check error by turning off power, and on again.

1Check if connecting wire of indoor unit or remote controller

is connected correctly.
2Check if noise entered into transmission wire of remote
controller.

3Re-check error by turning off power, and on again.

1

Check if indoor/outdoor connecting wire is connected correctly.

2

Check if noise entered into indoor/outdoor connecting wire or
power supply.

3

Check if noise entered into indoor/outdoor controller board.

4

Re-check error by turning off power, and on again.

P.100
P.100
P.100
P.101

P.101
P.101

P.99

P.99
P.105
P.105
P.105
P.105

P.99

P.99
P.105

P.105

P.106~

P.108

Detailed

reference

page

The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormali­ty can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on out­door controller board.

95

Operation LED5/LED6 (Red)

Lit

Normal (Stop)

Normal (Operating)

Fan stops.
Controller board is outputting waveform for fan driving.

Contents

Operation

LED5/LED6 (Red)

Importance

2 blinks 1

2
3
4
5

6 blinks

8 blinks

7 blinks

Abnormal
is detected

Abnormality of bus voltage: Abnormal if bus voltage inspected for 1.5msec. is less than 60V or more than 390V.
Abnormality of overcurrent: Abnormal if current value of DC bus in fan controller board is over the cut-off point.
Abnormality of startup failure: Abnormal if the operating speed does not reach 100rpm even 12 sec passed after startup.
Abnormality of position detection: Abnormal if the position of U-phase cannot be detected after starting up fan.
Abnormality of disconnection: Abnormal if the first pattern of U/V/W-phase position detected after startup is H/H/H or L/L/L.

Meaning of error code and detection method

Remark

These

LEDs

are not

used

for

service.

U2
U7
U1

UF
UP
UH

U6

U3

U4

U5

U9

P1

P2

P9

P4

P5

P6

P8

Indication Error

Error

code

w1

Outdoor controller board

Contents Inspection method

LED1 (Green)

LED2 (Red)

3 blinking 1 blinking

2 blinking

W1 Error code displayed on remote controller

4 blinking

5 blinking

6 blinking

7 blinking

1 blinking

2 blinking

3 blinking

4 blinking

4 blinking

Abnormality of shell thermostat
and discharging temperature (TH4)

Abnormality of super heat due
to low discharge temperature

1Check if stop valves are open.
2Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller board are not

disconnected.

3Check if unit fills with specified amount of refrigerant.
4Measure resistance values among terminals on indoor valve and outdoor linear

expansion valve using a tester.

Abnormal high pressure (High
pressure switch 63H worked.)

1Check if indoor/outdoor units have a short cycle on their air ducts.
2Check if connector (63H) on outdoor controller board is not disconnected.
3Check if heat exchanger and filter is not dirty.
4Measure resistance values among terminals on linear expansion valve using a

tester.

1Check if stop valves are open.
2Check looseness, disconnection, and converse connection of compressor wiring.
3Measure resistance values among terminals on compressor using a tester.
4Check if outdoor unit has a short cycle on its air duct.

Compressor over current breaking (Start-up locked)
Compressor over current breaking
Abnormality of current sensor (P.B.)
Abnormality of power module
Open/short of discharge thermistor (TH4)

Open/short of outdoor ther­mistor (TH8)

Open/short of outdoor thermistors
(TH3, TH6, TH7 and TH8)

1

Check if connectors (TH3, TH4, TH6 and TH7) on outdoor controller board and conn-

ector (CN3) on outdoor power board are not disconnected.

2

Measure resistance value of outdoor thermistors.

Abnormality of radiator panel
temperature

1Check if indoor/outdoor units have a short cycle on their air ducts.
2Measure resistance value of outdoor thermistor(TH8).

Abnormality of voltage 1Check looseness, disconnection, and converse connection of compressor wiring.

2Measure resistance value among terminals on compressor using a tester.
3Check the continuity of contactor (52C).
4Check if power supply voltage decreases.
5Check the wiring of CN52C.
6Check the wiring of CNAF. (RP4~6VHA only)

Abnormality of room temperature thermistor (TH1)
Abnormality of pipe temperature thermistor /Liquid (TH2)
Abnormality of pipe temperature
thermistor/Condenser-Evaporator

1Check if connectors (CN20, CN21 and CN29) on indoor controller board are not
disconnected.
2Measure resistance value of indoor thermistors.

Abnormality of drain sensor (DS)

Indoor drain overflow protection

1Check if connector (CN31) on indoor controller board is not disconnected.
2Measure resistance value of indoor thermistors.
3Measure resistance value among terminals on drain-up machine using a tester.
4Check if drain-up machine works.
5Check drain function.

Freezing (cooling)/overheating
(heating) protection

1Check if indoor unit has a short cycle on its air duct.
2Check if heat exchanger and filter is not dirty.
3Measure resistance value on indoor and outdoor fan motors.
4Check if the inside of refrigerant piping is not clogged.

Abnormality of pipe
temperature

1Check if indoor thermistors (TH2 and TH5) are not disconnected from holder.
2Check if stop valve is open.
3Check converse connection of extension pipe. (on plural units connection)
4Check if indoor/outdoor connecting wire is connected correctly. (on plural units

connection)

W2 LED1 on power board for RP4, RP5 and RP6
1 blink: Power is supplied. 3 blinks:

Power is supplied to warm up compressor.

2 blinks: Power is supplied to compressor. Blinking: Limited control is being performed.

P.102
P.103
P.102

P.104
P.104
P.104
P.103
P.103
P.103

P.103
P.104

P.97
P.97
P.99

P.97

P.98

P.98

Detailed

reference

page

LED indications of fan operating condition (LED5 and LED6 on controller board)

96

12-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

P1

P2

Meaning of error code and detection method

Abnormality of room temperature
thermistor (TH1)

1 The unit is in three-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)

2 Constantly detected during cooling,

drying, and heating operation.
Short: 90: or more

Open: -40: or less

Abnormality of pipe temperature
thermistor/Liquid (TH2)

1 The unit is in three-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)

2 Constantly detected during cooling,

drying, and heating (except defrosting)
operation.
Short: 90: or more
Open: -40: or less

1 Defective thermistor
2 Contact failure of connector

3 Breaking of wire or contact
4 Defective indoor controller

1 Defective thermistor
2 Contact failure of connector

3 Breaking of wire or contact
4 Defective refrigerant circuit is

5 Defective indoor controller board.

Case

characteristics.
(CN20) on the indoor controller

board. (Insert failure)
failure of thermistor wiring.
board.

characteristics.
(CN21) on the indoor controller

board. (Insert failure)
failure of thermistor wiring.
causing thermistor temperature

of 90: or more or -40: or
less.

Judgment and action

1–3 Check resistance value of thermistor.
0: ······15.0k"
10: ····9.6k"
20: ····6.3k"
30: ····4.3k"
40: ····3.0k"
If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor
breaking of wire or contact failure can be
detected.
2 Check contact failure of connector (CN20) on

the indoor controller board. Refer to page
110and 111. Put the power on again and
check restart after inserting connector again.

4 Check room temperature display on remote

controller.
Replace indoor controller board if there is
abnormal difference with actual room temper­ature.
There is no abnormality if none of above
comes within the unit.
Put the power off, and on again to operate.

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN21) on

the indoor controller board. Refer to page
110and 111. Put the power on and check
restart after inserting connector again.

4 Check pipe <liquid> temperature with remote

controller in test run mode. If pipe <liquid>
temperature is exclusively low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.

5 Check pipe <liquid> temperature with remote

controller in test run mode. If there is exclu­sive difference with actual pipe <liquid> tem­perature, replace indoor controller board.
There is no abnormality if none of above
comes within the unit.
Put the power off, and on again to operate.

P4

P5

Abnormality of drain sensor (DS)

1 Suspensive abnormality, if short/open of

thermistor is detected for 30 seconds
continuously.
Put off compressor and indoor fan.

2 Short/open is detected for 30 seconds

continuously during suspensive
abnormality.
(The unit returns to normal operation,

if it has normally reset.)

3 Detect the following condition.

• During cooling and drying operation.

• In case that pipe <liquid> temperature

- room temperature <-10deg
(Except defrosting)

• When pipe <liquid> temperature or
room temperature is short/open
temperature.

• During drain pomp operation.

Malfunction of drain pump (DP)

1 Suspensive abnormality, if thermistor of

drain sensor is let heat itself and tem­perature rises slightly. Put off compres­sor and indoor fan.

2 Drain pomp is abnormal if the condition

above is detected during suspensive
abnormality.

3 Constantly detected during drain pomp

operation.

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN31) on the indoor controller
board. (Insert failure).

3 Breaking of wire or contact

failure of drain sensor wiring.

4 Defective indoor controller board.

1 Malfunction of drain pump
2 Defective drain

Clogged drain pump
Clogged drain pipe

3 Attached drop of water at the

drain sensor

• Drops of drain trickles from
lead wire.

• Clogged filter is causing
wave of drain.

4 Defective indoor controller board.

1–3 Check resistance value of thermistor.

0: ······6.0k"
10: ····3.9k"
20: ····2.6k"
30: ····1.8k"
40: ····1.3k"
2 Check contact failure of connector (CN31) on

the indoor controller board. Refer to page
110and 111. Put the power on again and
check restart after inserting connector again.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited,
and abnormality reappears.
There is no abnormality if none of above
comes within the unit. Put the power off, and
on again to operate.

1 Check if drain-up machine works.
2 Check drain function.
3 Check the setting of lead wire of drain sensor

and check clogs of the filter.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited
and abnormality reappears.
Refer to page 110and 111.
There is no abnormality if none of above
comes within the unit. Put the power off, and
on again to operate.

97

Error Code

123456

ON
OFF

123456

ON
OFF

123456

ON
OFF

123456

ON
OFF

A-Control Service Tool SW2 setting

Temperature display of indoor liquid pipe
Indoor 1

Temperature display of indoor liquid pipe
Indoor 2

Temperature display of indoor condenser/
evaporator pipe Indoor 1

Temperature display of indoor condenser/
evaporator pipe Indoor 2

P6

P8

Meaning of error code and detection method
Freezing/overheating protection is

working

1 Freezing protection (Cooling mode)

The unit is in six-minute resume prevention
mode if pipe <liquid or condenser/evap-

(Cooling or drying mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)

orator> temperature stays under

-15: for three minutes, three minutes
after the compressor started. Abnormal
if it stays under -15: for three minutes
again within 16 minutes after six-minute

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is

resume prevention mode.

2 Frost abnormality (Only for the combination

with inverter-type outdoor unit)

Suspensive abnormal if unit operates in
frost prevention mode (below) for 9
minutes or more. After that, when frost
prevention mode is released and

5 Overcharge of refrigerant
6 Defective refrigerant circuit

compressor restarts its operation, unit is
not detected as abnormal if compressor
keeps operating for 20 minutes continously

and abnormal if compressor stops

operating within 20 minutes and unit
operates in frost prevention mode for
more than 9 minutes again. (Not abnormal

if unit stops operating in frost prevention

(Heating mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Over-load (high temperature)

mode within 9 minutes)
<Frost prevention mode>
If pipe <liquid or condenser-evaporator>
temperature is 2: or below when 16
minutes has passed after compressor
starts operating, unit will start operating

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is

in frost prevention mode which stops
compressor operation. After that, when
pipe <liquid or condenser/evaporator>
temperature stays 10: or more for 3
minutes, frost prevention mode will be
released and compressor will restart its
operation.

5 Overcharge of refrigerant
6 Defective refrigerant circuit

3 Overheating protection (Heating mode)

The units is in six-minute resume
prevention mode if pipe <condenser /

7 Bypass circuit of outdoor unit

evaporator> temperature is detected as
over 74: after the compressor started.
Abnormal if the temperature of over
74: is detected again within 10 minutes
after six-minute resume prevention
mode.

Abnormality of pipe temperature

1 Slight temperature difference
<Cooling mode>
Detected as abnormal when the pipe tem­perature is not in the cooling range 3 min­utes later of compressor start and 6 min­utes later of the liquid or condenser/evapo­rator pipe is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

2 Converse connection of

(TH2 or TH5) – intake temperature
(TH1) [ -3 deg

TH: Lower temperature between: liquid

3 Converse wiring of indoor/

pipe temperature and condenser/
evaporator temperature

4 Defective detection of indoor
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is

5 Stop valve is not opened
detected as abnormal when
condenser/evaporator pipe temperature is
not in heating range within 20 minutes.

Note 3) It takes at least 27 minutes to

detect abnormality.

Note 4) It excludes the period of defrosting

(Detection restarts when defrosting
mode is over)

Heating range : 3 deg [ (Condenser/

Evaporator temperature(TH5) –
intake temperature(TH1))

Case

operation beyond the tolerance
range

defective.

(clogs)

operation beyond the tolerance
range

defective.

(clogs)
is defective.

between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor

• Shortage of refrigerant

• Disconnected holder of pipe
<liquid or condenser /

evaporator> thermistor

• Defective refrigerant circuit

extension pipe (on plural units
connection)

outdoor unit connecting wire
(on plural units connection)

room temperature and pipe
<condenser / evaporator>
temperature thermistor

completely.

98

Judgment and action

(Cooling or drying mode)

1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's winding.

Measure the output voltage of fan's connector
(FAN) onthe indoor controller board.
WThe indoor controller board should be

normal when voltage of AC220V to 240V is
detected while fan motor is connected.
Refer to page 110 and 111.

56 Check operating condition of refrigerant

circuit.

(Heating mode)

1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's

winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be

normal when voltage of AC220V to 240V
is detected while fan motor is connected.
Refer to page 110 and 111.

5~7Check operating condition of refrigerant

circuit.

1~4 Check pipe <liquid or condenser /

evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.

Conduct temperature check with outdoor
controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

)

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor
unit connecting wire.

Error Code

123456

ON
OFF

123456

ON
OFF

A-Control Service Tool SW2 setting

Temperature display of indoor condenser/
evaporator pipe Indoor 1

Temperature display of indoor condenser/
evaporator pipe Indoor 2

P9

Meaning of error code and detection method

Abnormality of pipe temperature ther­mistor / Condenser-Evaporator (TH5)

1 The unit is in three-minute resume pro-

tection mode if short/open of thermistor
is detected. Abnormal if the unit does
not get back to normal within three min­utes. (The unit returns to normal opera­tion, if it has normally reset.)

2 Constantly detected during cooling, dry-

ing, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less

1 Defective thermistor
2 Contact failure of connector

3 Breaking of wire or contact
4 Temperature of thermistor is

5 Defective indoor controller

Case

characteristics
(CN29) on the indoor controller

board. (Insert failure)
failure of thermistor wiring.
90: or more or -40: or less

caused by defective refrigerant
circuit.

board.

Judgment and action

1–3 Check resistance value of thermistor.

For characteristics, refer to (P1) above.

2 Check contact failure of connector (CN29)

on the indoor controller board.
Refer to page 110 and 111.
Put the power on and check restart after
inserting connector again.

4 Operate in test run mode and check pipe

<condenser / evaporator> temperature with
outdoor controller circuit board. If pipe
<condenser / evaporator> temperature is
exclusively low (in cooling mode) or high (in
heating mode), refrigerant circuit may have
defective.

5 Operate in test run mode and check pipe

<condenser / evaporator> temperature with
outdoor control circuit board. If there is
exclusive difference with actual pipe
<condenser / evaporator> temperature
replace indoor controller board.
There is no abnormality if none of above
comes within the unit.
Put the power off and on again to operate.

In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service

(

tool (PAC-SK52ST).

)

Remote controller signal receiving error

1 Abnormal if indoor controller board can

not receive normally any data from
remote controller or from other indoor
controller board for three minutes.

2 Indoor control board cannot receive any

signal from remote controller for two

E4

E5

E6

E7

minutes.

Remote controller transmitting error

1 Abnormal if indoor controller board cannot

check the blank of transmission path for
three minutes.

2 Abnormal if indoor controller board cannot

finish transmitting 30 times consecutively.

Indoor/outdoor unit communication
error (Signal receiving error)

1 Abnormal if indoor controller board

cannot receive any signal normally for
six minutes after putting the power on.

2 Abnormal if indoor controller board

cannot receive any signal normally for
three minutes.

3 Consider the unit abnormal under the

following condition: When two or more
indoor units are connected to one
outdoor unit, indoor controller board
cannot receive a signal for three minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.

Indoor/outdoor unit communication
error (Transmitting error)

Abnormal if “1” receiving is detected 30
times continuously though indoor controller
board has transmitted “0”.

1 Contact failure at transmission

wire of remote controller

2 All remote controllers are set

as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.

3 Defective transmitting receiving

circuit of remote controller

4 Defective transmitting receiving

circuit of indoor controller
board

5 Noise has entered into the

transmission wire of remote
controller.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into the

transmittion wire of remote
controller.

1 Contact failure, short circuit or,

mis-wiring (converse wiring) of
indoor/outdoor unit connecting
wire

2 Defective transmitting receiving

circuit of indoor controller board

3 Defective transmitting receiving

circuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into power

supply.

3 Noise has entered into outdoor

control wire.

99

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main”.

If there is no problem with the action above.

3 Diagnose remote controllers.

a) When “RC OK” is displayed,

Remote controllers have no problem.
Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.

b) When “RC NG” is displayed,

Replace remote controller.
c) When “RC E3” is displayed,
d) When “ERC 00-06” is displayed,
[ c),d)➜Noise may be causing abnormality. ]

✽ If the unit is not normal after replacing

indoor controller board in group control,
indoor controller board of address “0”
may be abnormal.

12 Put the power off, and on again to check.

If abnormality generates again, replace
indoor controller board.

✽ Check LED display on the outdoor control

circuit board. (Connect A-control servise tool,
PAC-SK52ST.)
Refer to EA-EC item if LED displays EA-EC.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor unit or
outdoor unit.

Check all the units in case of twin triple
indoor unit system.

2-4 Put the power off, and on again to check.

If abnormality generates again, replace
indoor controller board or outdoor
controller circuit board.

✽ Other indoor controller board may have

defective in case of twin triple indoor unit
system.

1-3 Put the power off, and on again to check.

If abnormality generates again, replace
indoor controller board.

<Abnormalities detected when the power is put on>

Error Code

None

F3

(5202)

F5

(5201)

F9

(4119)

Meaning of error code and detection method

1 No voltage is supplied to terminal

2 Electric power is not charged

3 Electric power is not supplied to

—

4 Disconnection of reactor (DCL

5 Disconnection of outdoor noise

6 Defective outdoor power circuit
7 Defective outdoor controller

63L connector open

Abnormal if 63L connector circuit is open
for three minutes continuously after power
supply.
63L: Low-pressure switch

<PUHZ-RP4~6VHA only>

63H connector open

Abnormal if 63H connector circuit is open
for three minutes continuously after power
supply.
63H: High-pressure switch

2 connector open

Abnormal if both 63H and 63L connector
circuits are open for three minutes continu­ously after power supply.

63H: High-pressure switch
63L: Low-pressure switch

<PUHZ-RP4~6VHA only>

1 Disconnection or contact failure

2 Disconnection or contact failure
3 63L is working due to refriger-
4 Defective outdoor controller

1 Disconnection or contact failure

2 Disconnection or contact failure
3 63H is working due to defective
4 Defective outdoor controller

1 Disconnection or contact failure

2 Disconnection or contact failure
3 63H and 63L are working due
4 Defective outdoor controller

Case

block(TB1) of outdoor unit.

a) Power supply breaker is put

off.

b) Contact failure or discon-

nection of power supply
terminal

c) Open phase (L or N phase)

to power supply terminal of
outdoor power circuit board.

a) Contact failure of power

supply terminal

b) Open phase on the outdoor

power circuit board

RP3V :Disconnection of

connector R or S

RP4V~6V :Disconnection of

connector SC-R or SC-S

outdoor controller circuit board.

a) Disconnection of connector

(CNDC)

or ACL)

filter circuit board or parts failure
in outdoor noise filter circuit
board

board
circuit board

of 63L connector on outdoor
controller circuit board

of 63L
ant leakage or defective parts.
circuit board

of 63H connector on outdoor
controller circuit board

of 63H
parts.
circuit board

of connector (63H,63L) on
outdoor controller circuit board.

of 63H, 63L
to defective parts.
board.

Judgment and action

1 Check following items.

a) Power supply breaker
b) Connection of power supply terminal block.

(TB1)

c) Connection of power supply terminal block.

(TB1)

2 Check following items.

a) Connection of power supply terminal block.

(TB1)

b) Connection of terminal on outdoor power

circuit board.

RP3V :Disconnection of connector R or S.

Refer to page 115.

RP4V-6V :Disconnection of connector SC-R

or SC-S. Refer to page 116.

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board.
Check connection of the connector, LD1 and
LD2 for RP3V and CNDC for RP4-6V, on the
outdoor power circuit board.

4 Check connection of reactor. (DCL or ACL)

RP3V: Check connection of “LO” and “NO” on

the outdoor noise filter circuit board.
Check connection of “R” and “S” on
the outdoor power circuit board.
Refer to page 113 and 115.

RP4-6V: Check connection of “L1” and “L2”

on the active filter module.(ACTM)

5 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.
Refer to page 113 and 114.

6 Replace outdoor power circuit board.
7 Replace controller board (When items above

are checked but the units can not be
repaired.)

1 Check connection of 63L connector on

outdoor controller circuit board.
Refer to page 112.

2 Check the 63L side of connecting wire.
3 Check refrigerant pressure.

Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.
1 Check connection of 63H connector on

outdoor controller circuit board.
Refer to page 112.

2 Check the 63H side of connecting wire.
3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

1 Check connection of connector(63H,63L) on

outdoor controller circuit board.
Refer to page 112.

2 Check the 63H and 63L side of connecting

wire.

3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

100