Mitsubishi PUHZ-RP200YHA2, PUHZ-RP250YHA2 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit
[model names]

PUHZ-RP200YHA2

PUHZ-RP250YHA2

[Service Ref.]

PUHZ-RP200YHA2
PUHZ-RP250YHA2

November 2007

No.OCH428

Note:

• This manual describes only

service data of the outdoor
units.

• RoHS compliant products

have <G> mark on the
spec name plate.

PUHZ-RP200YHA2
PUHZ-RP250YHA2

CONTENTS

1. REFERENCE MANUAL ································ 2

2. SAFETY PRECAUTION································3

3. FEATURES····················································7

4. SPECIFICATIONS ········································· 8

5. DATA······························································ 9

6. OUTLINES AND DIMENSIONS ·················· 12

7. WIRING DIAGRAM ····································· 13

8. WIRING SPECIFICATIONS························· 14
REFRIGERANT SYSTEM DIAGRAM

9.

10. TROUBLESHOOTING································· 21

11. FUNCTION SETTING ·································· 73

12.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

13. EASY MAINTENANCE FUNCTION··············90

14. DISASSEMBLY PROCEDURE···················· 93

············ 19

········· 80

PARTS CATALOG (OCB428)

1

REFERENCE MANUAL

INDOOR UNIT’S SERVICE MANUAL

Model name Service Ref.

PLA-RP35/50/60/71/100/125/140BA PLA-RP35/50/60/71/100/125/140BA

PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA
PCA-RP50GA2 PCA-RP50GA2

PCA-RP71/125HA

PKA-RP35/50GAL PKA-RP35/50GAL

PKA-RP60/71/100FAL PKA-RP60/71/100FAL
PKA-RP50FAL2 PKA-RP50FAL2

PEAD-RP50/60/71/125/140EA
PEAD-RP35/100EA2

PEAD-RP60/71/100GA

PEA-RP200/250/400/500GA

PCA-RP71/125HA

PEAD-RP50/60/71/125/140EA.UK
PEAD-RP35/100EA2.UK

PEAD-RP60/71/100GA.UK

PEA-RP200/250/400/500GA.TH-AF
PEA-RP200/250GA.TH-AFMF

(1).UK

Service

Manual No.

OCH412
OCB412

OC328

OC329

OC330

OC331

HWE05210

HWE05060

HWE0708A

2

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply
circuits must be disconnected.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.

In case of using the existing pipes for R22, be careful with
the followings.

· Be sure to perform replacement operation before test run.

· Change flare nut to the one provided with this product.
Use a newly flared pipe.

· Avoid using thin pipes.

Make sure that the inside and outside of refrige­rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.

Contamination inside refrigerant piping can cause deterio­ration of refrigerant oil etc.

Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige­rant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check
valve.

Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for
use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Tools for R410A
Gauge manifold
Charge hose

Gas leak detector

Torque wrench

Flare tool
Size adjustment gauge
Vacuum pump adaptor

Electronic refrigerant
charging scale

Keep the tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com­pressor.

Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.

If large amount of mineral oil enters, that can cause deterio­ration of refrigerant oil etc.

Charge refrigerant from liquid phase of gas
cylinder.

If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera­nt will change and the efficiency will be lowered.

Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

3

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

 Electronic scale

 Gas leak detector ·Use the detector for R134a, R407C or R410A.

 Adaptor for reverse flow check ·Attach on vacuum pump.

 Refrigerant charge base

 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

 Refrigerant recovery equipment

specifications

. (UNF1/2)

4

5

2-3. Precautions when reusing existing R22 refrigerant pipes

(1) Flowchart

Measure the existing pipe thickness and check
for damage.

The existing pipe thickness meets specifi­cations and the pipes are not damaged.

Check if the existing air conditioner can operate.

The existing air conditioner can operate. The existing air conditioner cannot operate.

After operating the cooling system for about
30 minutes, do a pump down work.

Disconnect the existing air conditioner from
the pipes.

The existing piping can be reused.
After flaring the pipes again, connect the
new air conditioner.

Use a refrigerant recovery device to recover the refrigerant.

Check the oil condition when recovering refrigerant.

Oil is clean. (Clear to brownish color)

In case that existing pipes were
used for gas or oil heat pump
system, be sure to clean the pipes.

Oil is dirty. (Black color)

The existing pipe thickness does not meet
specifications or the pipes are damaged.

When the compressor bearings
are seized, winding is damaged
or the compressor breaks down,
iron particles or oil deterioration will
blacken the oil.

The existing pipes cannot be reused.
Use new pipes.

Perform the following inspections: air
tightness test, vacuum dryness (additional
refrigerant charge), gas leakage check

Replacement operation

Test operation

·When performing replacement operation, make sure that DIP SW8-2 on outdoor unit controller board is
set to ON.

+Chemical compounds containing chlorine left in existing pipes are recovered by replace filter.
LThe air conditioner automatically performs cooling operation through replace filter for about 2 hours.

Connecting a new air conditioner to existing R22 refrigerant pipes

 Flare the pipe for the use with R410A refrigerant.

Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.

 When reusing existing R22 refrigerant pipes of which gas pipe is :28.58mm and, when the outdoor unit is installed to lower

position than the indoor unit, be sure to change the setting of the DIP SW8-1 on the controller circuit board of the outdoor
unit to ON.

=This is to increase the speed of refrigerant passing in the gas pipe so that refrigerant oil can smoothly flow in the system.

• Use a different-diameter joint or brazing for the connection.

 When reusing standard-size existing R22 refrigerant pipes.

The pipes can be reused with pipe length restriction described on TECHNICAL DATA BOOK.

(2) Cautions for refrigerant piping work

1/4
3/8
1/2
5/8
3/4

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

36.0

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions(inch)

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A R22

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same
as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working
pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7mm or below.)

Diagram below: Piping diameter and thickness

Nominal

dimensions (inch)

1/4
3/8
1/2
5/8
3/4
7/8

1

1-1/8

Outside

diameter (mm)

6.35

9.52

12.70

15.88

19.05

22.20

25.40

28.58

Thickness (mm)

R410A R22

0.8

0.8

0.8

1.0
—
—
—
—

0.8

0.8

0.8

1.0

1.0

1.0

1.0

1.0

Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refriger
ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been speci­fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.

-

Dimension A

Flare cutting dimensions

Nominal

dimensions(inch)

Outside

diameter
1/4
3/8
1/2
5/8
3/4

6.35

9.52

12.70

15.88

19.05

Dimension A

R410A R22

9.1

13.2

16.6

19.7

24.0

+0

( )

-0.4

9.0

13.0

16.2

19.4

23.3

(mm)

Tools for R410A (The following table shows whether conventional tools can be used or not.)

Tools and materials Use R410A tools Can R22 tools be used?
Gauge manifold

Charge hose
Gas leak detector

Refrigerant recovery equipment
Refrigerant cylinder
Applied oil

Safety charger

Charge valve

Vacuum pump

Flare tool

Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale

Vacuum gauge or thermis­tor vacuum gauge and
vacuum valve
Charging cylinder

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.

Air purge, refrigerant charge and
operation check
Gas leak check

Refrigerant recovery
Refrigerant charge

Apply to flared section

Prevent compressor malfunction
when charging refrigerant by

spraying liquid refrigerant
Prevent gas from blowing out

when detaching charge hose
Vacuum drying and air
purge

Flaring work of piping

Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refri­gerant to thermistor vacuum gauge)
Refrigerant charge

Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil, ether oil and

alkylbenzene oil (minimum amount)
Tool exclusive for R410A

Tool exclusive for R410A

Tools for other refrigerants can
be used if equipped with adop­ter for reverse flow check
Tools for other refrigerants

can be used by adjusting
flaring dimension

(Usable if equipped

with adopter for rever­ se flow)

(Usable by adjusting
flaring dimension)

Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used

Tool exclusive for R410A

6

Dimension B

Can R407C tools be used?

Ester oil, ether oil:
Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever­ se flow)

(Usable by adjusting

flaring dimension)

3 FEATURES

3-1. COMBINATION OF INDOOR AND OUT DOOR UNITS

3-1-1. 1:1 SYSTEM, 1:2 SYSTEM

Outdoor unit

Indoor unit

PEA-RP200, 250GA

3-1-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM
(1) Synchronized twin (50:50)

Indoor unit

PLA-RP100BA 2
PLA-RP125BA2
PEAD-RP100EA2 2

PEAD-RP125EA 2

PEAD-RP100GA 2

PKA-RP100FAL 2

PCA-RP100GA 2

PCA-RP125GA 2

PCA-RP125HA 2

PUHZ-RP·YHA2

200 250

Outdoor unit

PUHZ-RP·YHA2

200 250

Indoor unit

200  2 250  2

PEA-RP400, 500GA

(2) Synchronized triple (33:33:33)

Outdoor unit

Indoor unit

PLA-RP60BA 3
PLA-RP71BA 3

PEAD-RP60EA 3
PEAD-RP71EA 3
PEAD-RP60GA 3
PEAD-RP71GA 3
PKA-RP60FAL 3
PKA-RP71FAL 3
PCA-RP60GA 3
PCA-RP71GA 3
PCA-RP71HA 3

PUHZ-RP·YHA2

200 250

PUHZ-RP·YHA2

Outdoor unit

(3)

Synchronized quadruple (25:25:25:25)

PLA-RP50BA 4
PLA-RP60BA 4

PEAD-RP50EA 4
PEAD-RP60EA 4
PEAD-RP60GA 4
PKA-RP50GAL 4
PKA-RP50FAL2 4
PKA-RP60FAL 4
PCA-RP50GA(2) 4

PCA-RP60GA

Indoor unit

Outdoor unit

PUHZ-RP·YHA2

200 250

4

3-1-3. MULTI DISTRIBUTION PIPE (OPTION)

Ratio of distributing Part No.

Synchronized twin 50:50 MSDD-50WR-E

Synchronized triple 33:33:33 MSDT-111R-E

Synchronized quadruple 25:25:25:25 MSDF-1111R-E

3-2. FEATURES

PUHZ-RP200YHA2
PUHZ-RP250YHA2

CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m)

The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant level
regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often
causes problems. It is completely eliminated by chargeless system. This unique system improves the quality
and reliability of the work done. It also helps to speed up the installation time.

7

4 SPECIFICATIONS

Service Ref.

Mode

Power supply (phase, cycle, voltage)
Running current
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices

Crankcase heater
Heat exchanger
Fan Fan(drive) % No.
Fan motor output
Airflow

OUTDOOR UNIT

Defrost method
Noise level

Dimensions

Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.

Connection method

Between the indoor &
outdoor unit

REFRIGERANT PIPING

*

Cooling
Heating

W

D
H

Liquid

Gas
Indoor side
Outdoor side
Height difference
Piping length

mm(in.)
mm(in.)
mm(in.)

kg(lbs)

kg(lbs)

mm(in.)
mm(in.)

A
A

kW

W

kW

/min(L/s

dB
dB

L

PUHZ-RP250YHA2PUHZ-RP200YHA2

Cooling

7.70

HP switch

Comp. Shell thermo

)

135(297)

6.5(14.3)

2.30(FV50S)

9.52(3/8)

25.4(1)

19

4.7

58
59

Heating

3 phase 50Hz, 400V

8.90

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANB52FFJMT

Inverter

—

Plate fin coil

Propeller fan % 2

0.150 + 0.150
130(2170)

Reverse cycle

950(37-3/8)

330 + 30(13+1-3/16)

1,350(53-1/8)

R410A

Flared

Flared & Brazing

Max. 30m

Max. 120m

Cooling

9.50

HP switch, LP switch

21

5.5

Discharge thermo

58
59

136(299)

7.1(15.7)

1.60(FV50S)

12.7(1/2)

25.4(1)

Heating

11.1

8

9

5 DATA

Amount of additional refrigerant charge (kg)

30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-120 m and less

0.9 kg 1.8 kg 2.7 kg 3.6 kg

1.2 kg 2.4 kg 3.6 kg 4.8 kg

Outdoor unit

Permitted
pipe length

RP200

RP250

120m or less

Initial charge

(kg)

6.5

7.1

No additional

charge necessary

The additional charge
amount is obtained by
the following formula.

Main piping:
Liquid line size
:9.52 overall length [m]

%

0.09

[kg/m]

Branch piping: Liquid
line size
:9.52 overall length [m]
% 0.06 [kg/m]

Branch piping: Liquid
line size
:6.35 overall length [m]
% 0.02 [kg/m]

3.6 (kg)

Amount of additional
charge [kg]

Main piping:
Liquid line size
:12.7 over all length [m]
% 0.12 [kg/m]

=

Additional charge amount
for 70 m

RP200 3.6 kg
RP250 4.8 kg

+

+

+–

Calculate the additional charge amount based on the following procedure.
If the calculation results in an amount that is smaller than the "Additional charge amount for 70m," perform the additional charge using the amount shown
in "Additional charge amount for 70m."

5-1. ADJUSTING THE AMOUNT OF REFRIGERANT

5-2. COMPRESSOR TECHNICAL DATA

DWÛ&

Unit

Compressor model

PUHZ-RP200, 250YHA2

ANB52FFJMT

U-V

0.30

Winding

Resistance

U-W

0.30

(  )

W-V

0.30

5-3. NOISE CRITERION CURVES

MICROPHONE

1.5m

1m

UNIT

GROUND

PUHZ-RP200YHA2
PUHZ-RP250YHA2

90

80

70

60

50

40

COOLING

HEATING

58
59

SPL(dB)

MODE

LINE

NC-70

NC-60

NC-50

NC-40

30

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-30

NC-20

5-4. ELECTRICAL PARTS SPECIFICATIONS

Outdoor unit

PUHZ-RP200YHA2

Parts name

FUSE

(FUSE1,2)

PUHZ-RP250YHA2

250V 15A

FUSE

(F 3,4)

Valve

4-way Valve Coil

21S4

Linear Expansion

Valve

Linear Expansion

Valve Coil

(LEV-A)(LEV-B)

Bypass Valve

Bypass Valve Coil

(SV)

Reactor

(DCL)

High pressure switch

(63H1)

High Pressure

Switch

(63H, 63H2)

Low Pressure

Switch

(63L)

Fan Motor

(MF1)(MF2)

Thermistor

(Outdoor Pipe)

(TH3)

Thermistor

(Discharge)

(TH4)

Thermistor

(Outdoor2-PhasePipe)

(TH6)

Thermistor

(Outdoor)

(TH7)

7HUPLQDO%ORFN

(Power Supply)

(TB1)

7HUPLQDO%ORFN

(Indoor / Outdoor)

(TB2)

Main Smoothing Capacitor

(CB1, CB2)

Rush Current

Protect Resister

(RS)

Compressor

(MC)

250V 6.3A

STF0731Z

STF AC220~240V

(BG50T388)

UKV-32D

(0~480 Pulse)

DC12V

FDF6A-008-RK

FQ AC220~240V

2.7mH 25A

—

OFF 3.60 + 0.2MPa

ON 2.80 ± 0.15MPa

—

8P 150W % 2

SIC-81FW-D8187

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(L1, L2, L3, N, )

(S1, S2, S3)

2200 400V

:

ANB52FFJMT

Scroll type 6P

OFF 4.14±0.1MPa / ON 3.14±0.15MPa

5P

3P

HAM-BD35

(0~480 Pulse)

ACB-1UB24

OFF -0.03 ± 0.03MPa

ON 0.05 ± 0.04MPa

10

PUHZ-RP250YHA2PUHZ-RP200YHA2

PLA-RP125BA ×2PLA-RP100BA ×2

PLA-RP125BAPLA-RP100BA

3, 50

3, 50

1, 501, 50

230230

400

400

HeatingCooling

HeatingCooling

11.1

2.37

(24.2)

0.60

(6.12)

72.8

41.2

0.9

7.5

20

15

41.1

7

6

–

–

9.50

2.86

(29.2)

0.89

(9.08)

78.2

48.4

16.2

7.5

27

19

14.2

35

24

0.77

0.10

8.90

2.46

(25.1)

0.64

(6.53)

65.6

42.9

-0.1

7.5

20

15

38.1

7

6

–

–

7.70

2.71

(27.6)

0.95

(9.69)

66.1

46.3

11.5

7.5

27

19

15.3

35

24

0.78

0.13

0.13 ×20.14 ×2

0.94 ×2 0.87 ×2

0.14 ×20.15 ×2

1.00 ×2 0.94 ×2

19,000 22,400 22,000 27,000

5.19 6.10 6.83 7.48

Electrical circuitRefrigerant circuitIndoor side

Outdoor

side

Representative matching

SHF

BF

Mode

Capacty

Input

Total

(kgf/%)

(kgf/%)

Phase , Hz

Voltage

Input

Current

Outdoor unit

Phase , Hz

Voltage

Current

Discharge pressure

Suction pressure

Discharge temperature

Condensing temperature

Suction temperature

Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

V

kW

A

V

A

Mpa

Mpa

Û&

Û&

Û&

m

Û&

Û&

Û&

Û&

Û&

Indoor unit

D.B.

W.B.

D.B.

D.B.

W.B.

W

kW

5-5. STANDARD OPERATION DATA

The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/cm2)

11

6 OUTLINES AND DIMENSIONS

PUHZ-RP200YHA2
PUHZ-RP250YHA2

175600175

2-U Shaped notched holes

(foundation Bolt M10)

Installation Feet

Rear Air Intake

53

40560

417

37028 19

33030

Terminal Connections

Left···Power supply wiring

60 37

70

2-12%36 oval holes

(Foundation Bolt M10)

Air Discharge

)

Right···Indoor/Outdoor wiring

(

Earth terminal

950

322

Handle for moving

Service Panel

635



1350

Unit : mm

999

995



Brazing

*1 439

*1 A

371

*2 339

Front piping cover

Rear piping cover

71

23

71

Bottom piping hole

(Knockout)

219

Drain hole

(5-:33)

14514514522030

81

Side Air Intake

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

3 FOUNDATION BOLTS2 SERVICE SPACE

purchased locally.)

150

Over

Dimensions of space needed

for service access are

shown in the below diagram.

FREE

FOUNDATION

30

<Foundation bolt height>

Less than

500

Over

500

Over

10

Over

Service space

Over 150mm

Over 10mm

Handle for moving

Side Air Intake

Side Air Intake

Rear Air Intake

Handle for moving

Handle for moving

Handle for moving

A

447



:9.52

(3/8 inch)

421

:12.7

(1/2 inch)

Air Intake

Power supply wiring hole

(2-:27Knockout)

Rear trunking hole

(Knockout)

4045

5527

Right trunking hole

(Knockout)

Power supply wiring hole

4075

(2-:27Knockout)

6373

Right piping hole

(Knockout)

5527

40 45

Power supply wiring hole

(2-:27Knockout)

Rear piping hole

92

:92

637323

:92

922723

6373

:92

(Knockout)

65

5519

92

23

65

92

The diagram below shows a basic

example.

Explantion of particular details is

given in the installation manuals etc.

1 FREE SPACE (Around the unit)

Over 10mm

Over 1000mm

· · · ·Refrigerant GAS pipe connction (FLARE):19.05(3/4 inch)

· · · ·Refrigerant LIQUID pipe connection (FLARE)

Example of Notes





*1· · · ·Indication of STOP VALVE connection location

*2· · · ·Refrigerant GAS PIPE connention(BRAZING) O.D:25.4

PUHZ-RP250YHA2

PUHZ-RP200YHA2

12

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

Piping Knockout Hole Details

7 WIRING DIAGRAM

PUHZ-RP200YHA2 PUHZ-RP250YHA2

[LEGEND]

SYMBOL
TB1
TB2 Terminal Block<Indoor/Outdoor>
MC
MF1,MF2
21S4
SV Solenoid Valve (Bypass Valve)
63H,63H1,63H2
63L Low Pressure Switch
TH3
TH4
TH6
TH7
LEV-A,LEV-B
ACL4
DCL
CB1,CB2
RS
FUSE1, FUSE2
CY1,CY2

Terminal Block<Power Supply>

Motor for Compressor
Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Electronic Expansion Valve

Reactor
Reactor
Main Smoothing Capacitor
Rush Current Protect Resistor

Fuse<T15AL250V>
Capacitor

C. B.

1

MF1

MS
3~

1

MF2

MS
3~

TB2

S1

INDOOR
UNIT

S2

S3

NAME SYMBOL NAME SYMBOL NAME

TH7TH6 TH3 TH4

WÛ WÛ WÛ WÛ

CNF1

CNS

(WHT)

31

CY2

CY1

BRN

ORN

7

(WHT)

CNF2

7

(WHT)

2

YLW

3

1

CNDC
(PNK)

WHT

FUSE1

WHT

412121
TH7/6
(RED)

(WHT)

TRANS

CNAC
(WHT)

REDRED

FUSE2

P.B.

SC-U/V/W
TB-L1/L2/L3
TB-P1
TB-P2
TB-C1
TB-N1
X52A

N.F.

LI1/ LI2/LI3/NI
LO1/ LO2/LO3
GD1,GD2

C.B.

SW1

SW4
SW5
SW6
SW7

+3.
For RP200

63H

TH3

TH4

(WHT

)

CN2

(WHT)

1

F3

21

F4

43

7

2

2

RS

RED

Power Circuit Board
Connection Terminal<U/V/W-Phase>
Connection Terminal<L1/L2/L3-Power supply>

Connection Terminal
Connection Terminal

Connection Terminal

Connection Terminal

52C Relay

Noise Filter Circuit Board
Connection Terminal
Connection Terminal
Connection Terminal<Ground>

Controller Circuit Board
Switch<Forced Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch>
Switch<Model Select>
Switch<Function Setup>

+3.
For RP250

63H2

63H1

63H

(YLW)

7

7

P. B.

7

CN2

(WHT)

1

2

(WHT)

1
2

(RED)

1

BLK

BLK

TB-P1

31

CN4

CN5

X52A

DCL

+4.
RP250 only

63L

31

63L

(RED)

TB-P2

+5.
RP200
RP250

LED2

LEV-A

M

LEV-A
(WHT)

21S4

RED

=

5 LINE

=

6 LINE

<L1/L2/L3/NI-Power supply
<L1/L2/L3-Power supply>

+6.RP250 only

LEV-B

M

35

61

61

LED1

CN4

(WHT)

12

2

X52

21S4

(GRN)

CB1 CB2

CNVMNT

LEV-B

(WHT)

(RED)

(WHT)

X55

13

SV2

(BLU)

SV

TB-C1 TB-N1

WHT

CNM

SC-W

SC-V

SC-U

31

CNMNT

(WHT)

TB-L3

TB-L2

TB-L1

BLK

51

141

1313

>

X51

(WHT)

SW5SW8SW4

SWP

SS

SW8
SW9
SWP
CN31
LED1,LED2
F3,F4
SS
CNM
CNMNT

CNVMNT

CNDM

CN3S
CN51
X51,X52,X55

+1+

1

SW6SW1

CN31

CN3S

CNDM

CN51

BLK

WHT

RED

BLK

WHT

RED

Switch<Function Setup>
Switch
Switch<Pump Down>
Connector<Emergency Operation>
LED<Operation Inspection Indicators>

Fuse<T6.3AL250V

Connector<Connection for Option>
Connector<A-Control Service Inspection Kit>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
< Connected for Option (Contact Input)>
Connector<Connection for Option>
Connector<Connection for Option>
Relay

SW7

SW9

1

3

(WHT)

1

3

(WHT)

1

(WHT)

5

>

When M-NET adapter is connected

5

SW1

CN5

ABS

(WHT)

1

LED2

LED3

LED4

M-NET SUBSTRATE

2

CND

1

CN2M

(WHT)

(WHT)
31

LED1

LED5

3

TB7

M-NET

5

SW11

SW12

M-NET ADAPTER

SYMBOL

TB7
CN5
CND
CN2M
SW1

MC

W

V

MS

3~

U

SW11
SW12
LED1
LED2
LED3
LED4
LED5

Terminal Block(M-NET connection)

Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>

Switch<Status of communication>
Switch<Address setting:1st digit>
Switch<Address setting:2nd digit>
LED<Power Supply:DC5V>
LED<Connection to Outdoor Unit>
LED<Transmission:Sending>
LED<Transmission:Receiving>
LED<Power Supply:DC12V>

NAME

POWER
SUPPLY
3N~
400V 50Hz

NO FUSE
BREAKER

TB1

L1

L2

L3

N

RED

WHT

BLK

BLU

GRN/YLW

2

N. F.

CNAC1

(WHT)

31

LI 1

LI 2

UU

LI 3

U

NI

U

U

GD2GD1

BLK

CNDC
(PNK)

BLK

CNCT
(RED)

31

2

WHT

CNAC2

(RED)

3112

LO 1

RED

LO 2

WHT

LO3

BLK

+

1 MODEL SELECT

MODEL

200Y

U

13

CNL

(BLU)

WHT

ACL4

250Y

+

2. SW5 -1 to 5 : Function Switch

SW6

ON
OFF

12345678

ON
OFF

12345678

ON
OFF

ON
OFF

SW5-6+2

123456

123456

13

8 WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING (power wiring specifications)

P200, P250

Outdoor unit model RP200, 250
Outdoor unit
Power supply
Outdoor unit input capacity *1
Main switch (Breaker)

Wiring

Wire No. %

size(mm

Outdoor unit power supply 5 % Min. 4
Indoor unit-Outdoor unit *2 Cable length 50 m : 3 % 4 (Polar)/Cable length 80 m : 3 % 6 (Polar)
Indoor unit-Outdoor unit earth 1 % Min. 2.5

2

)

Remote controller-Indoor unit *3 2 % 0.69 (Non-polar)
Outdoor unit L1-N, L2-N, L3-N AC 220 - 230 - 240 V

Circuit rating

Indoor unit-Outdoor unit S1-S2 *4 AC 220 - 230 - 240 V
Indoor unit-Outdoor unit S2-S3 *4 DC 24 V
Remote controller-Indoor unit *4 DC 14 V

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2. Max. 80 m Total Max. including all indoor/indoor connection is 80 m.

• Use one cable for S1 and S2 and another for S3 as shown in the picture.

• Max. 50m Total Max. for PEA-200, 250, 400, 500
Wiring size 3%1.5(Polar)
*3. The 10 m wire is attached in the remote controller accessory.
*4. The figures are NOT against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.

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

2. Power supply cords and Indoor unit/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord.
(Design 60245 IEC 57)

3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied.

Phase
Frequency & Voltage

380/400/415V 50Hz
3 phase(4 wires)

3N~(3ph 4-wires), 50 Hz,

380 - 400 - 415 V

32 A

Isolator

A-Control

Outdoor Unit

S1

S2

S3

3 poles isolator

S1

S2

S3

A-Control

Indoor Unit

Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation
between power line and communication signal line. Therefore, please turn off the main power supply when servicing.
And do not touch the S1, S2, S3 terminals when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use
3-pole type.

Synchronized twin and triple system Electrical wiring

• Synchronized twin • Synchronized triple

Outdoor



Unit
power
supply

 Earth leakage breaker
 Wiring circuit breaker or

isolating switch

Outdoor
unit

unit

L1
L2

3

L



N

Indoor/outdoor
unit connection
cable

S1
S2
S3

Indoor
unit

S1
S2
S3

1

Remote
controller

2

Indoor
unit

1
2

S1
S2
S3

Unit
power
supply



 Earth leakage breaker
 Wiring circuit breaker or

isolating switch

Outdoor
unit

L1
L2
L



3

N

Indoor/outdoor
connection cable

S1
S2
S3

Indoor
unit

S1
S2
S3

1
2

Remote
controller

Indoor
unit

1
2

S1
S2
S3

Indoor
unit

1
2

S1
S2
S3

14

S1
S2
S3

Indoor/outdoor
unit connection
cable

Indoor
unit

Unit
power
supply

Unit
power
supply

Outdoor
unit No.1

L1
L2
L3



N

S1
S2
S3

L1
L2
L3

N

 Earth leakage breaker
 Wiring circuit breaker or

isolating switch







S1
S2
S3

Indoor/outdoor
unit connection
cable

TB4-1

TB4-2

Unit
power
supply

Outdoor
unit No.2

L

1

L2
L3



N

S1
S2
S3



1
2

Remote
controller

1:1 System (Indoor : PEA-200, 250) 1:2 System (Indoor : PEA-400, 500)

Indoor
unit

L1
L2
L3
N

S1
S2
S3



1

Remote
controller

2

supply

Unit
power



Unit
power



supply

 Earth leakage breaker
 Wiring circuit breaker or

isolating switch

Outdoor
unit

1

L
L2



L3

N

Indoor/outdoor
unit connection

cable
S1
S2
S3

8-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

Simultaneous twin/triple/four system

<For models without heater>

The optional indoor power supply terminal kit is required.

*



L

1

L

2



L



3



N

S1
S2
S3





L

L

N

S1
S2
S3

1



2

L

N

N

S1

S1

S2

S2

S3

S3

1

1

2

2

L
N

S1
S2
S3

1
2

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

If the indoor and outdoor units have separate power supplies, refer to the table below.
If the optional indoor power supply terminal kit is used, change the indoor unit electrical
box wiring referring to the figure in the right and the DIP switch settings of the
outdoor unit control board.

Indoor unit specifications
Indoor power supply terminal kit (option)
Indoor unit electrical box connector con­nection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)

ON
OFF

Required

Required

Required

3

1 2 (SW8)

Electric heater
(For models with
heater)

L

N

S1

S2

S3

Indoor unit power supplied from outdoor unit
(when shipped from factory)

Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit.)

BLUE

BLUE

YELLOW

YELLOW

CND

Set the SW8-3 to ON.

* There are 3 types of labels (Labels A, B, and C). Affix the appropriate labels to

the units according to the wiring method.

Indoor unit model
Indoor unit power supply
Indoor unit input capacity
Main switch (Breaker)

Indoor unit power supply
Indoor unit power supply earth

)

2

Indoor unit-Outdoor unit

(mm

Wiring

Indoor unit-Outdoor unit earth

Wire No. % size

Remote controller-Indoor unit

Indoor unit L-N *4

Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3

rating

Circuit

Remote controller-Indoor unit

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductor of the supply.
*2. Max. 120 m
*3. The 10 m wire is attached in the remote controller accessory. Max. 500 m
*4. The figures are NOT always against the ground.

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

2. Power supply cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed
flexible cable. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

*1

*2

*3

*4
*4
*4

15

RP35~140

~/N (single), 50 Hz, 230 V

16 A

2 % Min. 1.5
1 % Min. 1.5
2 % Min. 0.3

–

2 % 0.3 (Non-polar)

AC 230 V

–
DC24 V
DC12 V

control board

Outdoor unit power supply



Earth leakage breaker



Wiring circuit breaker or isolating switch



Outdoor unit



Indoor unit/outdoor unit connecting cales



Remote controller



Indoor unit



Option



Indoor unit power supply



ORANGE
CND

Indoor unit

Electric heater
(For models with
heater)

L

N

S1

S2

S3

Separate indoor unit/outdoor unit power
supplies

If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.

BLUE

YELLOW

Connectors

CND

Indoor unit

control board

ORANGE
CND

YELLOW

BLUE

8-3. INDOOR – OUTDOOR CONNECTING CABLE

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

Cross section of cable Wire size (mm2) Number of wires Polarity L (m)*6

Round

Flat

Flat

Round

2.5 3

2.5 3

1.5 4

2.5 4

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

Not applicable
(Because center wire has no cover finish)

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

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

Not applicable

(30)

*2

*5

(18)

*3

(30)

*4

*1 : Power supply cords of appliances shall not be lighter than design 60245 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 1.5 mm.
*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 30 m.

2

Indoor/Outdoor separate
power supply

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

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

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

Wire No. % Size ($)

Max. 120m

2 % Min. 0.3

—

(3C Flat cable 2)

+ The optional indoor power supply terminal kit is necessary.

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to ground or a poor electrical contact at the intermediate connection point.

16

8-4. M-NET WIRING METHOD

(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 burn out.

(3) Use 2-core x 1.25mm

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.

2

shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

Group
remote
controller

Power
supply
unit for
transmission
wire

Refrigerant
address 00

M-NET
address 01

A-control
remote
controller

A-control
remote
controller

Refrigerant
address 00

M-NET
address 02

Refrigerant
address 00

M-NET
address 03

A-control
remote
controller

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.

Bad example (Multi spot grounding of shield wire)

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

Good example 1 (Single spot grounding of shield wire)

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

Good example 2 (Single spot grounding of shield wire)

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

If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the ground wire

and shield wire form 1 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 1 circuit.

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

installation manual.

17

ƔM-NET wiring

2

5

2

13

SW11
ones
digit

SW12
tens
digit

3

4

3

4

5

6

5

6

M-NET
terminal
block

M1 M2 S

Transmission

12

3

4

2

5

1

6

0

7

9

8

3

4

2

5

1

6

0

7

9

8

ON

OFF

1

3

4

5

2

6

6

ON

OFF

1

3

4

5

2

6

14

OFF

OFF

ON

ON

wire

3

2

1

0

9

8

3

2

1

0

9

8

1

1

Ground
wire

Shield
part

50

4

5

6

7

~

4

5

6

7

3

4

5

2

7

3

4

5

2

15

3

4

2

5

1

6

0

7

9

8

3

4

2

5

1

6

0

7

9

8

6

6

2

(1) Use 2-core x 1.25mm

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 M1 terminal and the other to M2. 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

(M1, M2, S) on M-NET terminal block should be individually wired to the other
outdoor unit’s terminal, i.e. M1 to M1, M2 to M2 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.

8-4-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI
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 CITY MULTI system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches

<Setting example>

M-NET Address No.

(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)

Switng
setting

8-4-2. 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. [Initial setting: all
switches are OFF. (All refrigerant addresses are “00”.)]

Refrigerant
address

ON

OFF

1

ON

OFF

1

ON

OFF

1

3

4

5

2

6

0

ON

OFF

1

3

4

5

2

6

8

ON

OFF

1

3

4

5

2

6

1

ON

OFF

1

3

4

5

2

6

9

ON

OFF

1

3

4

5

2

6

2

ON

OFF

1

3

4

5

2

6

10

ON

OFF

1

3

4

5

2

6

3

ON

OFF

1

3

4

5

2

6

11

ON

OFF

1

3

4

5

2

6

4

ON

OFF

1

3

4

5

2

6

12

8-4-3. 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.

Group A Group B Group C

System
controller

Power
supply
unit for
transmission
wire

Refrigerant
address 00

M-NET
address 01

A-control
remote
controller

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

Group A Group B

System
controller

Power
supply
unit for
transmission
wire

Refrigerant
address 00

M-NET
address 01

A-control
remote
controller

Refrigerant
address 00

M-NET
address 02

A-control
remote
controller

Refrigerant
address 01

M-NET
address 02

Refrigerant
address 01

M-NET
address 03

TB5

TB5

A-control
remote
controller

Refrigerant
address 00

M-NET
address 04

Refrigerant
address 00

M-NET
address 04

A-control
remote
controller

Refrigerant
address 01

M-NET
address 03

Refrigerant
address 02

M-NET
address 05

+ 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”.

18

9 REFRIGERANT SYSTEM DIAGRAM

Unit : mm

PUHZ-RP200YHA2

Ball valve

Refrigerant GAS pipe
:25.4(:1 inch)

Refrigerant LIQUID pipe
:9.52(:3/8 inch)

Strainer

(#50)

Service
port
(check)

Accumulator

Stop valve
(with service port)

Strainer
(#40)

4-way valve

Strainer
(#100)

Restrictor
valve

Strainer
(#100)

Muffler

Compressor

Linear expansion
valve

Outdoor heat exchanger

High pressure
switch(63H)

Service
port
(check)

Thermistor
(TH4)

Refrigerant flow in cooling

Refrigerant flow in heating

Distributor

Strainer
(#100)

Thermistor
(TH7)

Thermistor
(TH6)

Thermistor
(TH3)

PUHZ-RP250YHA2

Ball valve

Refrigerant GAS pipe
:25.4(:1 inch)

Stop valve
(with service port)

Refrigerant LIQUID pipe
:12.7(:1/2 inch)

High pressure
switch(63H2)

Strainer
(#50)

Service
port
(check)

Strainer
(#100)

Linear
expansion valve B

Strainer
(#100)

Power
receiver

Restrictor
valve

Capillary tube

O.D.4.0I.D.3.0L500

4-way valve

Low pressure
switch(63L)

Linear expansion valve A

Muffler

Compressor

Replace
filter

High pressure
switch (63H1)

Service
port
(check)

Bypass valve

Heat exchanger

Thermistor (TH4)
(Discharge)

Strainer
(#100)

Thermistor (TH7)

Thermistor (TH6)

Thermistor (TH3)

Distributor

Replace filter

19

Bypass valve

OFF

12

ON

<SW4>





 Stop  Operation
 Cooling  Heating

9-1. Refrigerant recovering (pump down)

Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.
Turn on the power supply (circuit breaker).

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

“CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.
After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor

(outdoor unit) and fans (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1 and
LED2 on the control board of the outdoor unit are lit.
+Set the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit is

stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is stopped.
Wait 3 minutes until compressor stops and set the SWP switch to ON again.
Because the unit automatically stops in about 2 to 3 minutes after the refrigerant recovering operation (LED1 is not lit

and LED2 is lit), be sure to quickly close the gas stop valve.
+In case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then

repeat step

 3 minutes later.

+If the refrigerant recovering operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain

stopped until the power supply is turned off.
Turn off the power supply (circuit breaker.)

9-2. Unit replacement operation

When reusing the existing pipes that carried R22 refrigerant for the RP200 and RP250 models, replacement operation
must be performed before performing a test run.

If new pipes are used, these procedures are not necessary.
During replacement operation, “C5” is displayed on “A-Control Service Tool(PAC-SK52ST)”.

Replacement operation procedures

Turn on the power supply.
Set DIP switch SW8-2 on the control board of the outdoor unit 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 replace-

ment operation.

TEST RUN

• During the replacement operation,

control board of the outdoor unit blink together.

The duration of the replacement operation is determined by the length of the piping. Always perform the replacement



operation for longer than the stipulated time.

* Use one of he following methods to complete replacement operation. When the replacement operation ends, the unit will

automatically stop.

(1)Set SW8-2 from ON to OFF. (When ending a replacement operation of

less than 2 hours.)

• Each time SW8-2 is set from OFF to ON, the replacement operation can

be started. Always perform the replacement operation for longer than the
stipulated time.

(2) The replacement operation will automatically stop after 2 hours. (It will end with SW8-2 still in the ON position.)

• When the replacement operation has ended automatically after 2 hours of operation, there is no need to set SW8-2 from

ON to OFF; normal air conditioning operations can be started with the SW8-2 being set to ON. However, to repeat the
replacement operation, SW8-2 will have to be returned to OFF and then set to ON.

,IWKHLQGRRUWHPSHUDWXUHLVEHORZÛ&WKHFRPSUHVVRUZLOORSHUDWHLQWHUPLWWHQWO\EXWWKHXQLWLVQRWIDXOW\

is displayed on the remote controller and LED1 (green) and LED2 (red) on the

<Required replacement operation times>

Piping Length

0 to 20 meters 30 minutes or more
21 to 30 meters 45 minutes or more
31 to 70 meters 60 minutes or more

"Replacement

Operation Time"

9-3. Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit

By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.

Set the operation mode (cooling/heating) using SW4-2.
Turn on SW4-1 to start test run with the operation mode set by SW4-2.
Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is

no problem with product because the linear expansion valve is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor

starts operating, but this is no problem with product because the check valve, itself, generates the
sound since pressure difference is small in the refrigerant circuit.

Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)

20

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

<Error code display by self-diagnosis and actions to be taken for service (summary)>

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.
Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the
table below. Check the contents below before investigating details.

Unit conditions at service

The trouble is reoccurring.

The trouble is not reoccurring.

Error code

Displayed

Not displayed

Logged

Not logged

Actions to be taken for service (summary)

Judge what is wrong and take a corrective action according
to “10-4. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the
trouble according to “10-5. Troubleshooting by inferior
phenomena”.

Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, remote controller and etc.

Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause of the

trouble
phenomena”.
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.

according to “10-5. Troubleshooting

by inferior

10-2. CHECK POINT UNDER TEST RUN

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Megger and

check that it is 1.0M or over.

+Don’t use 500V Megger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Turn on power supply 12 hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “11. Function setting”.

• Make sure to read operation manual before test run. (Especially items to secure safety.)

21

"TEST RUN" and the currently selected
operation mode are displayed altemately.

Displays the remaining
test run time.





[TEST] button



Pipe (liquid) temperature

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH
button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for
correct running.

6. Press the ON/OFF button to reset the test run in progress.

7. Register the contact number.







While the room temperature display on the remote
controller is “PLEASE WAIT”, the remote controller is disabled.
Wait until “PLEASE WAIT” disappears before using remote controller.
“PLEASE WAIT” appears for about 2 minutes after power
supply is turned on. +1

The TEST RUN appears on the screen.

Cooling mode:
Heating mode: Check if warm air blows. (It takes a little
while until warm air blows.)

Check for correct motion of auto-vanes.

The outdoor unit features automatic capacity control to
provide optimum fan speeds. Therefore, 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, but this does not
mean malfunction.

Check if cool air blows and water is drained.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin, triple and quadruple operation. Malfunctions
may not be displayed regardless of incorrect wiring.
+1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section

of the room temperature, and lamp(green) of the remote controller will blink.
As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the
address is not 0. LED3 will blink.
As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will be lit up. (After the startup mode of the system finishes,
LED2(red) will be turned off.)
In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from

the symptoms.

The below symptoms are under test run mode. “startup” in the table means the display status of +1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “PLEASE
WAIT”, and

After power is turned on, “PLEASE WAIT”
is displayed for 3 minutes, then error code
is displayed.

No display appears even when remote
controller operation switch is turned on.
(Operation lamp does not light up.)

Display appears but soon disappears
even when remote controller is operated.

+Press the remote controller’s

LCD

P1
P2
P4
P5
P6
P8
P9
Fb

cannot be operated.

CHECK

Contents of trouble

Abnormality of room temperature thermistor
Abnormality of pipe temperature thermistor/Liquid
Abnormality of drain sensor/ Float switch connector open
Drain overflow protection is working.
Freezing/overheating protection is working.
Abnormality of pipe temperature
Abnormality of pipe temperature thermistor/Cond./Eva
Abnormality of indoor controller board

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed,
green(once) and red(once) blink
alternately. <F1>

After “startup” is displayed,
green(once) and red(twice) blink

alternately. <F3, F5, F9>
After “startup” is displayed,

green(twice) and red(once) blink
alternately. <EA. Eb>

After “startup” is displayed, only
green lights up. <00>

After “startup” is displayed, only
green lights up. <00>

• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during

• Incorrect connection of outdoor terminal block (L
S1, S2, S3.)

• Outdoor unit’s protection device connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S1, S2, S3.)

• Remote controller transmission wire is short.

• There is no outdoor unit of address 0.
(Address is other than 0.)

• Remote controller transmission wire is open.

• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)

system startup. (Normal)

button twice to perform self-diagnosis. See the table below for the contents of LCD dis-

LCD

Malfunction outdoor unit

U1~UP

Malfunction

F3~F9
E0~E5

Remote controller transmitting error

E6~EF

Indoor/outdoor unit communication error
No error history

---­No applied unit

FFFF

Forced compressor stop(due to water leakage abnormality)

PA

outdoor unit

Contents of trouble

See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.

(microcomputer power supply)

LED1

(remote controller)

LED2

(indoor/outdoor communication)

LED3

Lits when power is supplied.
Lits when power is supplied for wired remote controller.
The indoor unit should be connected to the outdoor unit with address “0” setting.

Blinks when indoor and outdoor unit are communicating.

Cause

1, L2, L3 and

22



TEST RUN

TEST RUN

MODE

MODE

HEAT

FAN

VANE

,



ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

h

min





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.

 Turn on the main power to the unit.

 Press the

(Start this operation from the status of remote controller display
turned off.)

and current operation mode are displayed.

A

 Press the

check whether cool air is blown out from the unit.

 Press the

check whether warm air is blown out from the unit.

 Press the

from the unit.

 Press the

properly.

 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver

while following steps  to .

• It is not possible to run in FAN, DRY or AUTO mode.

button twice continuously.

( ) button to activate

( ) button to activate

COOL

mode, then

mode, then

button and check whether strong air is blown out

button and check whether the auto vane operates

23

10-3. HOW TO PROCEED "SELF-DIAGNOSIS"















10-3-1. When a Problem Occurs During Operation

If a problem occurs in the air conditioner, the indoor and outdoor units will stop,
and the problem is shown in the remote controller display.

 [CHECK] and the refrigerant address are displayed on the temperature
display, and the error code and unit number are displayed alternately as
shown below.
(If the outdoor unit is malfunctioning, the unit number will be "00".)

 In the case of group control, for which one remote controller controls
multiple refrigerant systems, the refrigerant address and error code of the
unit that first experienced trouble (i.e., the unit that transmitted the error
code) will be displayed.

 To clear the error code, press the button.

Error code (2 or 4 digits)

ON/OFF

(Alternating Display)

Address (3 digits) or unit number (2 digits)





When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During

central control by a MELANS controller, cancel the error code by pressing the

ON/OFF

button.

10-3-2. Self-Diagnosis During Maintenance or Service

Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote
controller or power is turned off.



Check the error code history for each unit using the remote controller.



Switch to self-diagnosis mode.



Press the
will change as shown below.

CHECK

button twice within 3 seconds. The display content

Unit number or refrigerant address
to be diagnosed

Set the unit number or refrigerant address you want to diagnose.



Press the [TEMP] buttons ( and ) to select the desired number
or address. The number (address) changes between [01] and [50] o r [00]

an d

[15].

The refrigerant address will begin to blink
approximately 3 seconds after being
selected and the self-diagnosis process will begin.



Display self-diagnosis results.

<When there is error code history>

(Alternating Display)

Error code (2 or 4 digits)

<When there is no error code history> <When there is no corresponding unit>

Address (3 digits) or unit number (2 digits)



Reset the error history.

Display the error history in the diagnosis result display screen (see step



).

24



CHECK

Press the

address or refrigerant address will blink.



Cancel self-diagnosis.
Self-diagnosis can be cancelled by the following 2 methods.



Press the



Press the

ON/OFF

CHECK

ON/OFF

button twice within 3 seconds. The self-diagnosis

button twice within 3 seconds.  Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the

button.  Self-diagnosis will be cancelled and the indoor unit will stop.

start of self-diagnosis.

When the error history is reset, the display will look like the one shown below.
However, if you fail to reset the error history, the error content will be displayed
again.

10-3-3. Remote Controller Diagnosis

If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.



First, check that the power-on indicator is lit.
If the correct voltage (DC12 V) is not supplied to the remote controller, the
indicator will not light.
If this occurs, check the remote controller's wiring and the indoor unit.

Power on indicator



Switch to the remote controller self-diagnosis mode.



Press the

will change as shown below.

CHECK

button for 5 seconds or more. The display content



Press the

FILTER

button to start self-diagnosis.



Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

Check for other possible causes, as there is no problem with the remote
controller.

[Where the remote controller is not defective, but cannot be operated.]
(Error display 2) [E3], [6833] or [6832] blinks.

There might be noise or interference on the transmission path, or the indoor
unit or other remote controllers are defective. Check the transmission path
and other controllers.

© Transmission is not possible.

[When the remote controller malfunctions]
(Error display 1) "NG" blinks. ©The remote controller's transmitting-receiv-

The remote controller must be replaced with a new one.

(Error display 3)

The number of data errors is the difference between the number of bits sent
from the remote controller and the number actually transmitted through the
transmission path. If such a problem is occurring, the transmitted data is
affected by noise, etc. Check the transmission path.

ing circuit is defective.

"ERC" and the number of data errors are displayed.
© Data error has occurred.

When the number of data errors is "02":

Transmission data from remote controller

Transmission data on transmission path



To cancel remote controller diagnosis



Press the
approximately 30 seconds, the state in effect before the diagnosis will be restored.

button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After

25

10-3-4. Malfunction-diagnosis method by wireless remote controller

<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]

CHECK
display

ON/OFF
button

CHECK
button

ON/OFF

MODE

CHECK

TEST RUN

SET

CHECK

FAN

VANE

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

h

min

Refrigerant
address
display

Temperature
button

HOUR
button

1. Press the CHECK button twice.

2. Press the temperature
buttons.

3. Point the remote controller at the

sensor on the indoor unit and
press the HOUR button.

• "CHECK" lights, and refrigerant
address "00" blinks.

• Check that the remote controller's
display has stopped before continuing.

• 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.)

• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit­ tent buzzer sound, the operation lamp
blinks, and the error code is output.
(It takes 3 seconds at most for error
code to appear.)

4. Point the remote controller at the

sensor on the indoor unit and
press the ON/OFF button.

• The check mode is cancelled.

26

• Refer to the following tables for details on the check codes.
[Output pattern A]

Beeper sounds

OPERATION
INDICATOR
lamp blink
pattern

Beep

Self-check
starts
(Start signal
received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)

rd

0.5 sec.

th

n

On

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

[Output pattern B]

Beeper sounds

OPERATION
INDICATOR
lamp blink
pattern

Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check
starts
(Start signal
received)

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

(Number of times)

1P1

2

P2 Pipe (TH2) sensor error
P9 Pipe (TH5) sensor error

3 E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Drain sensor error/Float switch connector open

5

P5 Drain pump error

PA Forced compressor stop(due to water leakage abnormality)
6 P6 Freezing/Overheating protection operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error

10
11

–

–

–

–

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error

– E1, E2 Remote controller control board error

nd

1st2

Off

Number of blinks/beeps in pattern indicates
the check code in the following table

rd

th

n

On

0.5 sec.

· · · Repeated

Beep Beep

nd

1st2

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates
the check code in the following table

· · · Repeated

Symptom Remark

As for indoor
unit, refer to
indoor unit's
service manual.

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Symptom Remark

(Number of times)

1

2
3
4

5

6

7
8
9

10

11

12
13
14

E9

UP
U3,U4
UF
U2

U1,Ud

U5
U8
U6
U7

U9,UH

–
–

Others

*1 If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

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

Compressor overcurrent interruption
Open/short of outdoor unit thermistors
Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating

protection operation

Abnormal temperature of heatsink

Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormality of power module
Abnormality of superheat due to low discharge temperature
Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

–

–
Other errors (Refer to the technical manual for the outdoor unit.)

2 beeps to confirm the self-check start signal was received and

there are no error records.

For details, check
the LED display
of the outdoor
controller board.

*2 If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

27

10-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is turned on>

Error Code

Abnormal point and detection method

 No voltage is supplied to terminal

block(TB1) of outdoor unit.
a) Power supply breaker is

b) Contact failure or disconnec-

c) Open phase (L2 or N phase)

(Note 1) Refer to indoor unit section for code P and code E.

Case

 Check following items.

a) Power supply breaker
b), c) Connection of power supply terminal

turned off.

tion of power supply
terminal

Judgment and action

block(TB1)

None —

63L connector open

Abnormal if 63L connector circuit is open
for 3 minutes continuously after power sup­ply.

F3

(5202)

63L: Low-pressure switch
<RP250 only>

 Electric power is not supplied to

outdoor controller circuit board.
a) Disconnection of connector

(CNDC)

 Disconnection of reactor

(ACL4)

 Disconnection of outdoor noise

filter circuit board or parts fail­ure in outdoor noise filter circuit
board

 Defective outdoor controller

circuit board

 Disconnection or contact failure

of 63L connector on outdoor
controller circuit board.

 Disconnection or contact failure

of 63L.

 63L is working due to refriger-

ant leakage or defective parts.

 Defective outdoor controller

circuit board.

 Check connection of the connector (CNDC)

on the outdoor controller circuit board.
Check connection of the connector CNDC on
the outdoor noise filter circuit board.
Refer to 10-9.

 Check connection of reactor. (ACL4)

 a) Check connection of outdoor noise filter

circuit board.
b) Replace outdoor noise filter circuit board.

Refer to 10-9.

 Replace controller board (When items above

are checked but the units cannot be repaired).

 Check connection of 63L connector on

outdoor controller circuit board.
Refer to 10-9.

 Check the 63L side of connecting wire.

 Check refrigerant pressure.

Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.

 Replace outdoor controller circuit board.

F5

(5201)

F9

(4119)

63H connector open

Abnormal if 63H connector circuit is open
for 3 minutes continuously after power sup­ply.
63H: High-pressure switch

2 connector open

Abnormal if both 63H and 63L connector
circuits are open for 3 minutes continuously
after power supply.

63H: High-pressure switch
63L: Low-pressure switch
<RP250 only>

 Disconnection or contact failure

of 63H connector on outdoor
controller circuit board

 Disconnection or contact failure

of 63H

 63H is working due to defective

parts.

 Defective outdoor controller

circuit board

 Disconnection or contact failure

of connector (63H,63L) on
outdoor controller circuit board.

 Disconnection or contact failure

of 63H, 63L.

 63H and 63L are working due

to defective parts.

 Defective outdoor controller

circuit board.

 Check connection of 63H connector on

outdoor controller circuit board.
Refer to 10-9.

 Check the 63H side of connecting wire.

 Check continuity by tester.

Replace the parts if the parts are defective.

 Replace outdoor controller circuit board.

 Check connection of connector(63H,63L) on

outdoor controller circuit board.
Refer to 10-9.

 Check the 63H and 63L side of connecting

wire.

 Check continuity by tester.

Replace the parts if the parts are defective.

 Replace outdoor controller circuit board.

28

Error Code

EA

(6844)

Eb

(6845)

Abnormal point and detection method

Indoor/outdoor unit connector
miswiring, excessive number of units

1. Outdoor controller circuit board can
automatically check the number of
connected indoor units. Abnormal if the

number cannot be checked automati­cally due to miswiring of indoor/outdoor
unit connecting wire and etc. after power
is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit

board recognizes excessive number of
indoor units.

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

Outdoor controller circuit board can
automatically set the unit number of indoor
units.
Abnormal if the indoor unit number can­not be set within 4 minutes after power on
because of miswiring (converse wiring or
disconnection) of indoor/outdoor unit con­necting wire.

Case

 Contact failure or miswiring of

indoor/outdoor unit connecting
wire

 Diameter or length of indoor/

outdoor unit connecting wire is
out of specified capacity.

 Excessive number of indoor

units are connected to 1 out­door unit.(5 units or more)

 Defective transmitting receiving

circuit of outdoor controller
circuit board

 Defective transmitting receiving

circuit of indoor controller board

 Defective indoor power board
 2 or more outdoor units have

refrigerant address “0” .
(In case of group control)

 Noise has entered into power
supply or indoor / outdoor unit
connecting wire.

 Contact failure or miswiring of

indoor/outdoor unit connecting
wire

 Diameter or length of indoor/

outdoor unit connecting wire is
out of specified capacity.

 Defective transmitting receiving

circuit of outdoor controller circuit
board

 Defective transmitting receiving

circuit of indoor controller board

 Defective indoor power board
 2 or more outdoor units have

refrigerant address “0”.

(In case of group control)
 Noise has entered into power

supply or indoor/outdoor unit
connecting wire.

Judgment and action

 Check disconnection or looseness or polar-

ity of indoor/outdoor unit connecting wire of
indoor and outdoor units.

 Check diameter and length of indoor/outdoor

unit connecting wire.
Total wiring length: 80m
(Including wiring connecting each indoor unit
and between indoor and outdoor unit)
Also check if the connection order of flat
cable is S1, S2, S3.

 Check the number of indoor units that are

connected to one outdoor unit. (If EA is
detected.)

~ Turn the power off once, and on again to
check.
Replace outdoor controller circuit board,
indoor controller board or indoor power
board if abnormality occurs again.

 Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board)
are overlapping in case of group control
system.

 Check transmission path, and remove the

cause.

+ The descriptions above, -, are for EA, Eb

and EC.

EC

(6846)

Start-up time over

The unit cannot finish start-up process
within 4 minutes after power on.

 Contact failure of indoor/

outdoor unit connecting wire

 Diameter or length of indoor/

outdoor unit connecting wire is
out of specified capacity.

 2 or more outdoor units have

refrigerant address “0” .
(In case of group control)

 Noise has entered into power

supply or indoor/outdoor unit
connecting wire.

29

<Abnormalities detected while unit is operating>

Error Code

U1

(1302)

Abnormal point and detection method

High pressure (High-pressure switch
63H(RP200)/63H1 or 63H2(RP250)
worked)

Abnormal if high-pressure switch
63H(RP200)/63H1 or 63H2(RP250) worked
( + ) during compressor operation.
+ 63H1: 4.15 MPa
63H, 63H2: 3.6 MPa

63H, 63H1, 63H2: High-pressure switch

Case

 Short cycle of indoor unit
 Clogged filter of indoor unit
 Decreased airflow caused by

dirt of indoor fan

 Dirt of indoor heat exchanger
 Locked indoor fan motor
 Malfunction of indoor fan motor
 Defective operation of stop

valve (Not fully open)

 Clogged or broken pipe
 Locked outdoor fan motor

 Malfunction of outdoor fan

motor

 Short cycle of outdoor unit
 Dirt of outdoor heat exchanger
 Decreased airflow caused by

defective inspection of outside
temperature thermistor
(It detects lower temperature
than actual temperature.)

 Disconnection or contact failure

of connector (63H) on outdoor
controller board

 Disconnection or contact failure

of 63H connection

 Defective outdoor controller

board

 Defective action of linear

expansion valve

 Malfunction of fan driving

circuit

Judgment and action

~Check indoor unit and repair defect.

 Check if stop valve is fully open.

 Check piping and repair defect.
~ Check outdoor unit and repair defect.

 Check the inspected temperature of outside

temperature thermistor on LED display.
(SW2 on A-Control Service Tool : Refer to
10-10.)

~Turn the power off and check F5 is

displayed when the power is turned again.
When F5 is displayed, refer to “Judgment
and action” for F5.

 Check linear expansion valve.

Refer to 10-7.

 Replace outdoor controller board.

U2

(1102)

U3

(5104)

High discharging temperature

(1) Abnormal if discharge temperature ther-

mistor (TH4) exceeds 125or 110
continuously for 5 minutes.
Abnormal if condenser/evaporator tem
perature thermistor (TH5) exceeds 40
during defrosting and discharge temper­ature thermistor (TH4) exceeds 110

(2) Abnormal if discharge superheat

(Cooling: TH4 – TH5 / Heating: TH4 –
TH6) exceeds 70 continuously for 10
minutes.

Open/short circuit of discharge
temperature thermistor (TH4)

Abnormal if open (3 or less) or short
(217 or more) is detected during
compressor operation.
(Detection is inoperative for 10 minutes
of compressor starting process and for 10
minutes after and during defrosting.)

.

 Overheated compressor opera-

tion caused by shortage of
refrigerant

 Defective operation of stop

-

valve

 Defective thermistor
 Defective outdoor controller

board

 Defective action of linear

expansion valve

Clogging with foreign objects in

refrigerant circuit

+Clogging occurs in the parts

which become below freez­ing point when water enters in
refrigerant circuit.

 Disconnection or contact

failure of connector (TH4) on
the outdoor controller circuit
board

 Defective thermistor

 Defective outdoor controller

circuit board

 Check intake superheat.

Check leakage of refrigerant.
Charge additional refrigerant.

 Check if stop valve is fully open.

 Turn the power off and check if U3 is dis-

played when the power is turned on again.
When U3 is displayed, refer to “Judgement
and action” for U3.

 Check linear expansion valve.

Refer to 10-7.

 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum
more than 1 hour.

 Check connection of connector (TH4) on the

outdoor controller circuit board.
Check breaking of the lead wire for
thermistor (TH4). Refer to 10-9.

 Check resistance value of thermistor (TH4) or

temperature by microcomputer.
(Thermistor/TH4: Refer to 10-7.)
(SW2 on A-Control Service Tool: Refer to
10-10.)

 Replace outdoor controller board.

30