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 R410A

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

PLA-RP·AA

PEA-RP·EA

PEAD-RP·EA

PLA-RP·AA

PLA-RP·AA1 PLA-RP·AA.UK PLA-RP·AA1.UK PEA-RP·EA.TH-A PEAD-RP·EA.UK PEAD-RP·EA1.UK

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

PUHZ-RP·VHA

PUHZ-RP·VHA PUHZ-RP·VHA-A

CONTENTS

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

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

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

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

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

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

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

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

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

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

11.TEST RUN • REPLACEMENT OPERATION

&EMERGENCY OPERATION···················

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

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

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

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

1 PAIRING TABLE OF THE INDOOR AND OUTDOOR UNITS

Outdoor unit [PUHZ]

Indoor unit

OC294

RP3VHA RP4VHA RP5VHA RP6VHA

PLA-RP·AA	OC293
PLA-RP·AA1	REVISED EDITION-A

PLA-RP·AA.UK OC297

PLA-RP·AA1.UK REVISED EDITION-A

PEAD-RP·EA.UK

—

PEAD-RP·EA1.UK

		Outdoor unit [PUHZ]
Indoor unit		OC300 REVISED EDITION-A
		RP3VHA-A RP4VHA-A RP5VHA-A RP6VHA-A
PEA–RP·EA.TH-A	OC299
	REVISED EDITION-A

2

2 SPECIFICATIONS FOR ELECTRICAL WORK

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

PUHZ-RP•VHA-A

Models (Outdoor unit) Indoor unit power supply

	Outdoor unit	Phase
	Power supply	Frequency & Voltage
	Input capacity	Indoor unit(A)
	Main switch/Fuse	Outdoor unit(A)
	Outdoor unit	Wire No.
	Power supply
	Wiring Wire No. o size (e)

Indoor unit/Outdoor unit connecting

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

Control circuit rating

RP3V	RP4V	RP5V	RP6V
	~ / N (Single), 50Hz, 220-230-240V
		~ / N (Single)
		50Hz, 220-230-240V
—	—	—	—
25/25	32/32	32/32	40/40
3	3	3	3

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

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
	Outdoor		Indoor			Outdoor		Indoor		Indoor
	unit		unit			unit		unit		unit
Unit	L		1	Remote	Unit	L		1	Remote		1
power	N		2	controller	power	N		2	controller		2
supply		Indoor/outdoor			supply		Indoor/outdoor
		unit connection					unit connection
	S1	cable	S1			S1	cable	S1			S1
	S2		S2			S2		S2			S2
Grounding	S3		S3		Grounding	S3		S3			S3
					• Synchronized triple
						Outdoor		Indoor		Indoor Indoor
						unit		unit		unit	unit
					Unit	L		1	Remote	1	1
					power	N		2	controller	2	2
					supply		Indoor/outdoor
						S1	connection cable	S1		S1	S1
						S2		S2		S2	S2
					Grounding	S3		S3		S3	S3

3

2-2. 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 be burn out.

(3)Use 2-core x 1.25mm2 shield 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.

Group		Refrigerant	Refrigerant	Refrigerant
		address 00	address 00	address 00
remote
controller		M-NET	M-NET	M-NET
	Power	address 01	address 02	address 03
	supply
	unit for
	transmission
	wire

A-control	A-control	A-control
remote	remote	remote
controller	controller	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		Power		M-NET type		M-NET type		M-NET type
remote		supply
				outdoor unit		outdoor unit		outdoor unit
controller		appliance

M-NET transmission wire

	Good example 1 (Single spot grounding of shield wire)
	Central	Power	M-NET type	M-NET type	M-NET type
	remote	supply
			outdoor unit	outdoor unit	outdoor unit
	controller	appliance
	M-NET transmission wire

	Good example 2 (Single spot grounding of shield wire)
	Central	Power	M-NET type	M-NET type	M-NET type
	remote	supply
			outdoor unit	outdoor unit	outdoor unit
	controller	appliance
	M-NET transmission wire

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

	● M-NET wiring
	(1)	Use 2-core x 1.25mm2 shield wire for electric wires.	M-NET
		(Excluding the case connecting to system controller.)	terminal		Ground
			block
	(2)	Connect the wire to the M-NET terminal block.Connect one core of the			wire
		transmission wire (non-polar) to A terminal and the other to B. Peel the
			A B		S
		shield wire, twist the shield part to a string and connect it to S terminal.
			Transmission		Shield
	(3)	In the system which several outdoor units are being connected, the terminal
			wire		part

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

outdoor unit’s terminal, i.e. A to 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

<Setting example> M-NET Address No.

SW11

ones

Switng digit setting SW12

tens digit

1

2	34
01	5
9	7	6
8
2	34
01	5
9	7	6
8

2			50
2	34		2	34
01	5		01	5
9	7	6	9	7	6
8			8
2	34		~	34
			2
01	5		01	5
9	7	6	9	7	6
8			8

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”.)]

			ON								ON								ON								ON								ON								ON								ON								ON
			OFF								OFF								OFF								OFF								OFF								OFF								OFF								OFF
Refuigrant				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								1								2								3								4								5								6								7
address
			ON								ON								ON								ON								ON								ON								ON								ON
			OFF								OFF								OFF								OFF								OFF								OFF								OFF								OFF
				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
						8								9								10								11								12								13								14								15

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.

		Group A	Group B		Group C
System		Refrigerant	Refrigerant	Refrigerant	Refrigerant
		address 00	address 00	address 01	address 00
controller
		M-NET	M-NET	M-NET	M-NET
	Power	address 01	address 02	address 03	address 04
	supply
	unit for
	transmission			TB5
	wire
		A-control	A-control		A-control
		remote	remote		remote
		controller	controller		controller

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

		Group A			Group B
	System	Refrigerant	Refrigerant	Refrigerant	Refrigerant	Refrigerant
		address 00	address 01	address 00	address 01	address 02
	controller
		M-NET	M-NET	M-NET	M-NET	M-NET
	Power	address 01	address 02	address 04	address 03	address 05
	supply
	unit for
	transmission			TB5
	wire
		A-control		A-control
		remote		remote
		controller		controller

wIn 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

PLA-RP3AA

PLA-RP3AA1 PLA-RP3AA.UK PLA-RP3AA1.UK

[LEGEND]

PLA-RP4AA

PLA-RP4AA1 PLA-RP4AA.UK PLA-RP4AA1.UK

PLA-RP5AA

PLA-RP5AA1 PLA-RP5AA.UK PLA-RP5AA1.UK

PLA-RP6AA

PLA-RP6AA1 PLA-RP6AA.UK PLA-RP6AA1.UK

SYMBOL

NAME

SYMBOL

NAME

SYMBOL

NAME

P.B

INDOOR POWER BOARD

MV

VANE MOTOR

W.B

WIRELESS REMOTE CONTROLLER BOARD

F1

FUSE (4A)

DP

DRAIN-UP MACHINE

RU

RECEIVING UNIT

ZNR

VARISTOR

DS

DRAIN SENSOR

BZ

BUZZER

I.B

INDOOR CONTROLLER BOARD

H2

DEW PREVENTION HEATER

LED1

LED (RUN INDICATOR)

CN2L

CONNECTOR (LOSSNAY)

TB4

TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE)

LED2

LED (HOT ADJUST)

CN32

CONNECTOR (REMOTE SWITCH) TB5

TERMINAL BLOCK (REMOTE CONTROLLER

SW1

SWITCH (HEATING ON/OFF)

CN41

CONNECTOR (HA TERMINAL-A)

TRANSMISSION LINE)

SW2

SWITCH (COOLING ON/OFF)

SW1

JUMPER WIRE (MODEL SELECTION) TH1

ROOM TEMPERATURE THERMISTOR

SW2

JUMPER WIRE (CAPACITY CORD)

(0:/15kΩ , 25:/5.4kΩ DETECT)

SWE

SWITCH (EMERGENCY OPERATION) TH2

PIPE TEMPERATURE THERMISTOR/LIQUID

X1

RELAY (DRAIN PUMP)

(0:/15kΩ , 25:/5.4kΩ DETECT)

X4

RELAY (FAN MOTOR)

TH5

COND./EVA. TEMPERATURE THERMISTOR

FC

FAN PHASE CONTROL

(0:/15kΩ , 25:/5.4kΩ DETECT)

LED1

POWER SUPPLY (I.B)

R.B

REMOTE CONTROLLER BOARD

LED2

POWER SUPPLY (I.B)

CN2

CONNECTOR (PROGRAM TIMER)

LED3

TRANSMISSION (INDOOR-OUTDOOR)

TB6

TERMINAL BLOCK (REMOTE CONTROLLER

C

CAPACITOR (FAN MOTOR)

TRANSMISSION LINE)

MF

FAN MOTOR

GRILLE

P.B

MV MV MV MV

CN2S(WHT)

F1

2

5

5

5

MF

5

H2

1 DC14V

ZNR

TB4

5

3

1

YLW

S1

1 2 3 6

7 4

8 9 5 10

ORN

S2

1 2 3

2

2

BRN

S3

TO OUTDOOR UNIT

1

3

	1	2	3
	C
I.B	RED	WHT	BLK

FAN 1 3 5 (WHT)

FC

SWE	SW2
ON	J24 J23 J22 J21
OFF

CONTROLLER BOARD OUTDOOR UNIT

DP

CN02 (WHT)

CN01 (BLU)

5

YLW

YLW

YLW YLW

YLW ORN

BRN

BLK

WHT

POWER VANE

D.U.M

1 3

D.HEATER

1 3

1 3 5

1 2

CNP

CNC (RED)

CN2D

CN6V

(BLU)

POWER

(WHT)

(WHT)

X4

CN03

(RED)

X4

X1

X1

CN41 CN2L

W.B

LED3 LED2 LED1

CN32

9

BZ

LED1

LED2

SW1

D.SENSOR INTAKE LIQUID

PIPE

REMOCON

CNB

RU

CN31

CN20

CN21

CN29

CN22

SW1

SW2

J11

J12

J13

J14

J15

(WHT)

(RED)

(WHT)

(BLK)

(BLU)

WIRELESS

1

2

3

1

2

1

2

1

2

1

2

CN90

(WHT)

	BLK	BLK	BLK	BLK	BLK	BLK	BLU BLU
DS	TH1			TH5			2TB5		CN2
	TH2
NOTES:							1
								TRANSMISSION
1.Since the outdoor side electric wiring may change be sure to								WIRES DC12V
check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities, make									Please set the voltage using
wiring matching terminal numbers (S1,S2,S3).									the remote controller.
3.Symbols used in wiring diagram above are,				:Connector,		:Terminal (block).			For the setting method, please
									refer to the indoor unit Installation
[Servicing]									Manual.

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.

R.B

1 2 TB6

C

TB4

	SW1
MODELS	Manufacture Service board
PLA-RP3,4,5,6AA		1 2 3 4 5
PLA-RP3,4,5,6AA1		ON
	J11J12J13J14J15	OFF

MODELS

PLA-RP3AA PLA-RP3AA1

PLA-RP4AA PLA-RP4AA1

			SW2
Manufacture Service board				MODELS	Manufacture	Service board
1	2	3	4	PLA-RP5AA		1	2	3	4
			ON						ON
J21J22J23J24			OFF		J21J22J23J24				OFF
1	2	3	4	PLA-RP5AA1		1	2	3	4
			ON	PLA-RP6AA					ON
J21J22J23 J24			OFF	PLA-RP6AA1	J21J22J23 J24				OFF

6

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

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

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
I.B	INDOOR CONTROLLER BOARD	P.B	INDOOR POWER BOARD	C	CAPACITOR(FAN MOTOR)
CN2L	CONNECTOR(LOSSNAY)	F1	FUSE(4A)	MF	FAN MOTOR
CN32	CONNECTOR(REMOTE SWITCH))	ZNR	VARISTOR	TB4	TERMINAL BLOCK
CN41	CONNECTOR(HA TERMINAL-A)	R.B	REMOTE CONTROLLER BOARD		(INDOOR/OUTDOOR CONNECTING LINE)
LED1	POWER SUPPLY(I.B)	CN2	CONNECTOR(PROGRAM TIMER)
LED2	POWER SUPPLY(R.B)	TB6	TERMINAL BLOCK(REMOTE
LED3	TRANSMISSOION(INDOOR • OUTDOOR)		CONTROLLER TRANSMISSON LINE)
SW1	JUMPER WIRE(MODEL SELECTION)	TH1	ROOM TEMPERATURE THERMISTOR
SW2	JUMPER WIRE(CAPACITY CORD)		(0˚C/15kΩ , 25˚C/5.4kΩ DETECT)
SWE	SWITCH(EMERGENCY OPERATION)	TH2	PIPE TEMPERATURE THERMISTOR/LIQUID
X4	RELAY(FAN MOTOR)		(0˚C/15kΩ , 25˚C/5.4kΩ DETECT)
X5	RELAY(FAN MOTOR)	TH5	COND./EVA. TEMPERATURE THERMISTOR
X6	RELAY(FAN MOTOR)		(0˚C/15kΩ , 25˚C/5.4kΩ DETECT)

INDOOR UNIT

MF

2

3

4

1

5

6

BLK

BLU

BRN

WHT

RED

C

ORN

YLW

ORN

BRN

WHT

BLK

I.B

FAN 1

3

5

7

POWER

1 3

5

1 POWER

(WHT)

CN03

2 CN2D

(RED)

3

CN31

(WHT)

2

WIRELESS

X6 X5 X4

1

CN90

2

LIQUID

(WHT)

X6 X5 X4

1

CN21

REMOCON

LED3 LED2 LED1

(WHT)

2 INTAKE

CN22

SW2

SW1

SWE

PIPE

(BLU) 2

1

CN20

1

J24 J23 J22 J21

J15 J14 J13 J12 J11

ON

CN29 2 1

(RED)

OFF

(BLK)

CN41

CN2L

CN24

CN32

TH5 TH2 TH1

	CN2S(WHT)					TB4
			F1	1	YLW	S1
	2				ORN	S2
		DC14V		2			TO OUTDOOR UNIT
	1		ZNR		BRN	S3
				3

3

2

1

CONT.BOARD OUTDOOR CN02(WHT) CN01(BLU)

P.B

TB5

BLU

BLU 2

1TRANSMISSION WIRE DC12V

R.B

CN2

1 2

TB6

	MODELS	SW1	SW2
			Manufacture Service board
	<For manufacture>		1 2 3 4
	3EA			ON
			J21J22J23J24	OFF
	4EA		1 2	3 4
				ON
			J21J22J23J24	OFF
	J11J12J13J14J15
	5EA		1 2	3 4
				ON
				OFF
	<For service board>		J21J22J23J24
	1 2	3 4 5	1 2	3 4
	6EA	ON		ON
		OFF	J21J22J23J24	OFF

[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).

[Self diagnosis]

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.

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 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.

	Measurement item	Pressure/temperature near JIS		Measurement method, remarks
		standard operating conditions
A	High pressure (MPa)	COOL: 2.3 ~ 3.0	HEAT: 2.0 ~ 3.2	Connect the pressure gauge to the high-pressure check valve.
B	Low pressure (MPa)	0.55 ~ 1.0		Connect the pressure gauge to the low-pressure check valve.
C	Discharge pipe temperature (:)	50 ~ 100		Measured with piping surface thermometer.
D	Suction pipe temperature (:)	-2 ~ +18		Measured with piping surface thermometer.
E	Indoor intake temperature (:)	COOL: 27: HEAT: 20:		Can be displayed on remote controller.
F	Indoor outlet temperature (:)	COOL: 8 ~ 20
		HEAT: 30 ~ 50
G	Outdoor intake temperature (:)	COOL: 35	HEAT: 7	Measured with piping surface thermometer.
H	Outdoor outlet temperature (:)	COOL: 40 ~ 50	HEAT: 0 ~ 5	Measured with piping surface thermometer.

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

Outdoor

heat exchanger

Ball valve

4-way valve

A

B

D

C

Indoor heat
exchanger	Linear	Power	Compressor
	expansion
	valve B	receiver	Linear
	Stop valve		expansion
	(with service port)		valve A

4-1-2. Operation pressure ranges

Discharge pressure (MPa)

Permissible operation range Normal operation range

4.5

4
3.5	Overload operation
3
2.5	Standard operation

2

1.5

1

0.5

0

0

0.2

0.4

0.6

0.8

1

1.2

Suction pressure (MPa)

11

4-2. Refrigerant System Diagram

PLA-RP3AA

PLA-RP3AA1 PLA-RP3AA.UK PLA-RP3AA1.UK PEA-RP3EA.TH-A PEAD-RP3EA.UK PEAD-RP3EA1.UK

PLA-RP4AA

PLA-RP4AA1 PLA-RP4AA.UK PLA-RP4AA1.UK PEA-RP4EA.TH-A PEAD-RP4EA.UK PEAD-RP4EA1.UK

Heat exchanger

PLA-RP5AA

PLA-RP5AA1 PLA-RP5AA.UK PLA-RP5AA1.UK PEA-RP5EA.TH-A PEAD-RP5EA.UK PEAD-RP5EA1.UK

Strainer #50

PLA-RP6AA

PLA-RP6AA1 PLA-RP6AA.UK PLA-RP6AA1.UK PEA-RP6EA.TH-A PEAD-RP6EA.UK PEAD-RP6EA1.UK

	Refrigerant GAS pipe connection
	(Flare)
	Condenser/evaporator
	temperature thermistor
	(TH5)
	Refrigerant flow in cooling
	Refrigerant flow in heating
	Refrigerant LIQUID pipe connection
	(Flare)
	Pipe temperature
Room temperature	thermistor/liquid
thermistor (TH1)	(TH2)

	Distributor	Strainer
		#50
	with strainer
	#50

12

PUHZ-RP3VHA				Heat exchanger	Thermistor TH7
PUHZ-RP3VHA-A
					(Outdoor)
Ball valve Strainer		4-way valve			Thermistor TH6
Refrigerant GAS pipe	#50				(Outdoor 2-phase pipe)
connection(5/8F)			Oil separator
				Service port	Thermistor TH3
			Bypass valve
				(High pressure)	(Outdoor pipe)
	Service port		Capillary tube
	(Low pressure)		O.D.4.0OI.D.2.4OL500		Distributor
		Capillary tube		High pressure
				switch 63H
		O.D.2.5OI.D.0.6OL1000
			Strainer
			#100
				Thermistor TH4
	Strainer			(Discharge)
	#100
		Power	Muffler Compressor
Stop valve		receiver
			Linear expansion valve A
(with service port)		Linear
Refrigerant LIQUID pipe		expansion
		valve B
connection(3/8F)
	Strainer		Strainer
	#100		#100

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

	Thermistor TH7
Heat exchanger	(Outdoor)

		Ball valve Strainer	4-way valve			Thermistor TH6
						(Outdoor 2-phase pipe)
Refrigerant GAS pipe		#50
connection(5/8F)						Thermistor TH3
					Service port
						(Outdoor pipe)
					(High pressure)
		Service port		Muffler
		(Low pressure)		Low pressure		Distributor
				switch 63L	High pressure
				Strainer
					switch 63H	Capillary tube
				#100		(O.D.4.0OI.D.3.0OL200)O2pcs
		Strainer			Thermistor TH4
					(Discharge)
		#100
			Power	Strainer	Compressor
	Linear expansion valve B			#100
	Stop valve		receiver
				Linear expansion valve A
	(with service port)		Restrictor
Refrigerant LIQUID pipe
			valve
connection(3/8F)		Strainer			Strainer
		#100	Strainer		#100
			#100
				Replace filter	Bypass valve

13

4-3. Applicable extension pipe for each model

4-3-1. 1:1 system

(a) Pipe length

<Table 1> Pipe length for 1:1 system

	Liquid	OD		[6.35			[9.52			[12.7
	pipe	Thick-		t0.8			t0.8			t0.8
	(mm)
		ness
	Gas	OD	[9.52	[12.7	[15.88	[12.7	[15.88	[19.05	[15.88	[19.05
	pipe	Thick-	t0.8	t0.8	t1.0	t0.8	t1.0	t1.0	t1.0	t1.0
	(mm)
		ness
	RP3			10m	10m	30m	50m		30m
	RP4						75m (*2)	50m (*1)	50m	50m (*1)
	RP5						75m (*2)	50m (*1)	50m	50m (*1)
	RP6						75m (*2)	50m (*1)	50m	50m (*1)

*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]

: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.

(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 service 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.

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

Permitted

Additional refrigerant charging amount for pipe

Number of

Height

Outdoor unit

length exceeding 30 m (kg)

pipe length

bends

difference

31 — 40m

41 — 50m

51 — 60m

61 — 75m

PUHZ-RP3

50m or below

0.6Kg

1.2Kg

—

—

15

30m or

PUHZ-RP4 —

RP6

75m or below

0.6kg

1.2kg

1.8kg

2.4kg

above

<Table 3>

Outdoor unit

Permitted

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

pipe length

10m or below

11 — 20m

21 — 30m

31 — 40m

41 — 50m

51 — 60m

61 — 75m

PUHZ-RP3

50m or below

3.1

3.3

3.5

4.1

4.7

—

—

0.6

1.2

—

—

PUHZ-RP4 —

RP6

75m or below

5.1

5.3

5.5

6.1

6.7

7.3

7.9

0.6

1.2

1.8

2.4

<Table 4> Additional refrigerant charging amount for liquid pipe which is one size larger than

standard diameter

Liquid pipe dia

Chargeless

Max. pipe length

Additional refrigerant charging amount

RP3

[12.7

20m

30m

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

RP4 — RP6

[12.7

20m

50m

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

14

(c) Capacity correction

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)

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

Cooling

100

Heating

Heating RP3, 4, 5

95

and 6 models

(Up to 55m for

ratio [%]

90

RP3 model

RP3 model)

85

Cooling

Capacity

RP4 model

80

75

RP5 model

RP6 model

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

70

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

Corrected pipe length

2Capacity curve for PUHZ-RP3 model

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

	100
								Heating RP3
	95
ratio [%]	90
Capacity
	85							Cooling RP3
	80
	5	10	15	20	25	30	35	40	45	50	55

Corrected pipe length

3 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	Permitted total piping		Chargeless piping		Indoor unit’s height	Bend number
			length	A + B + C	length	A + B + C	difference [B and C]	w 2
Outdoor		PUHZ-RP3VHA	50 m or less		30 m or less		8 m or less	15 at most
unit		PUHZ-RP4~6VHA	75 m or less
<Table 6>
		Synchronized twin	Permitted total piping		Charge-less piping		Indoor unit’s height difference	Bend number
			length	A + B + C + D	length	A + B + C + D	[B and C] [C and D] [B and D]	w 2
Outdoor		PUHZ-RP6VHA	70 m or less		30 m or less		8 m or less	15 at most
unit

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

<Table 7>										w Charge additional
				A + B + C (+D)
										refrigerant from
Outdoor unit		Additional refrigerant to be charged (kg)
										the check valve
	30 m or less		31 - 40 m		41 - 50 m	51 - 60 m			61 - 75 m	connected to the
PUHZ-RP3VHA	Not required		0.6		1.2					pipe of low-pressure
										side in indoor unit.
PUHZ-RP4~6VHA							1.8		2.4

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)		RP4 Twin (RP2 2)		RP5 Twin (RP2.5 2)		RP6 Twin (RP3 2)
						Main pipe diameter [A]
			Liquid [6.35	Liquid [9.52	Liquid [9.52	Liquid [12.7	Liquid [9.52	Liquid [12.7	Liquid [9.52	Liquid [12.7
			Gas [12.7	Gas [15.88	Gas [15.88	Gas [19.05	Gas [15.88	Gas [19.05	Gas [15.88	Gas [19.05
Branch pipe	Liquid [6.35			50 m	75 m( 2)	50 m( 1)
	Gas	[12.7
diameter
	Liquid [9.52			50 m	50 m	50 m( 1)	75 m( 2)	50 m( 1)	75 m( 2)	50 m( 1)
[B and C]
	Gas	[15.88
	Liquid [12.7
	Gas	[19.05
<Table 9> Pipe length for triple of RP6 (Piping length: A + B + C + D)
			Main pipe diameter [A]		1 ··· Set DIP SW8-1 on outdoor unit control circuit board to ON.
			Liquid [9.52	Liquid [12.7	2 ··· When using existing piping, pipe length should be 50 m at most.
			Gas [15.88	Gas [19.05	3 ··· Height difference between indoor and outdoor unit should be
Branch pipe	Liquid [6.35		75 m( 2)	50 m( 1)		kept within 30 m in every case.
	Gas	[12.7
diameter					[Marks in table]
	Liquid [9.52
[B,C and D]			50 m	50 m( 1)	··· Normal piping
	Gas	[15.88
					··· It can be used with some changes of piping length and the
	Liquid [12.7				amount of refrigerant to be charged.
	Gas	[19.05			··· It cannot be used.

16

30 m or less 1 m or less

Synchronized twin

	Indoor	Branch
		pipe B
	unit

Branch	Indoor
pipe C	unit

Optional distributing pipe Multi-distributor

	Main	Outdoor
		unit
	pipe A

30 m or less 1 m or less

Synchronized triple
Indoor	Branch	Branch	Indoor
unit	pipe B	pipe C	unit
		Branch	Indoor
		pipe D	unit

Optional distributing pipe Multi-distributor

	Main	Outdoor
		unit
	pipe A

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.

1When 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.

2When 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			HOW TO CHECK THE PARTS
5-1. INDOOR UNIT
• Common parts
Parts name							Check points
Room temperature					Disconnect the connector then measure the resistance using a tester.
thermistor			(TH1)		(Surrounding temperature 10:~30:)
Pipe temperature
thermistor			(TH2)		Normal	Abnormal		(Refer to below for a detail.)
Condenser/evaporator
					4.3k"~9.6k"	Open or short
temperature thermistor
			(TH5)
Drain sensor					Measure the resistance between the terminals using a tester.
			1		Measure the resistance after 3 minutes have passed since the power supply was intercepted.
					(Surrounding temperature 0:~60:)
			2
					Normal	Abnormal
			3
								(Refer to below for a detail.)
					0.6k"~6.0k"	Open or short

<Thermistor Characteristic graph>

		Thermistor for				Room temperature thermistor(TH1)
		lower temperature				Pipe temperature thermistor(TH2)
						Condenser/evaporator temperature
						thermistor(TH5)
	Thermistor R0=15kΩ ± 3%
	Fixed number of B=3480kΩ ± 2%
	Rt=15exp { 3480(			1						1	) }
				273+t						273
	0:		15kΩ
	10:		9.6kΩ
	20:		6.3kΩ
	25:		5.2kΩ
	30:		4.3kΩ
	40:		3.0kΩ

Drain sensor

Thermistor R0=6.0kΩ ±5%

Fixed number of B=3390kΩ ±2%

	Rt=6exp { 3390(		1				1	) }
			273+t	273
	0:	6.0kΩ
	10:	3.9kΩ
	20:	2.6kΩ
	25:	2.2kΩ
	30:	1.8kΩ
	40:	1.3kΩ

Resistance (K")

Resistance (K")

< Thermistor for lower temperature >

50

40

30

20

10

0

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

< Thermistor for drain sensor >

10

9

8

7

6

5

4

3

2

1

0

-20 0 20 40 60 80 Temperature (:)

18

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

Parts name

Check points

Vane motor

Measure the resistance between the terminals using a tester.

(Surrounding temperature20:)

Normal

Abnormal

15k"

Open or short

Fan motor

Measure the resistance between the terminals using a tester.

Relay connector

(Winding temperature 20:)

1

Red

1

Motor terminal

Normal

2

White

2

or

PLA-RP3AA

PLA-RP4,5,6AA

Abnormal

Relay connector

3

Black

3

Red-Black

87.2"

28.7"

Open or short

Protector

White-Black

104.1"

41.6"

OPEN :130:

CLOSE:80i20:

Drain pump

Measure the resistance between the terminals using a tester.

Red

(Winding temperature 20:)

1

Normal

Abnormal

2

290"

Open or short

Red

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

Parts name

Check points

Fan motor (MF)

Measure the resistance between the terminals using a tester.

Protector

(Winding temperature 20:)

(PEA-RP3,4,5EA)

OPEN :135:

Motor terminal

Normal

CLOSE:86i15:

(PEA-RP6EA)

or

PEA-

Abnormal

OPEN :150:

Relay connector

RP3EA.TH-A

RP4EA.TH-A

RP5EA.TH-A

RP6EA.TH-A

CLOSE:96i15:

White

White-Black

28.6"

20.6"

15.3"

10.2"

Orange

Black-Blue

12.5"

8.1"

5.1"

5.2"

Open or short

Red

Blue-Brown

4.3"

3.2"

2.7"

3.1"

Brown

Blue

Brown-Red

23.6"

16.0"

14.5"

12.1"

Black

PEAD-RP3EA.UK PEAD-RP4EA.UK PEAD-RP5EA.UK PEAD-RP6EA.UK

PEAD-RP3EA1.UK PEAD-RP4EA1.UK PEAD-RP5EA1.UK

PEAD-RP6EA1.UK

Parts name

Check points

Fan motor (MF)

Measure the resistance between the terminals using a tester.

PEAD-RP3EA(1).UK

(Winding temperature 20:)

Motor terminal

Normal

Black

or

Abnormal

Blue

Relay connector

PEAD-RP3EA(1).UK

Gray-Black

43.5"

Gray

(White or Red open)

Red White

Black-Blue

14.74"

Open or short

Protector

(White or Red open)

OPEN :150:

CLOSE:96i15:

Blue-Red

57.5"

(White or Red open)

PEAD-RP4,5,6EA(1).UK

Motor terminal

Normal

Black

or

PEAD-

Abnormal

Blue

Relay connector

RP4EA(1).UK

RP5EA(1).UK RP6EA(1).UK

Gray-Black

24.76"

10.27"

Red

(White or Red open)

White

Gray

Blue-Black

4.78"

2.11"

Open or short

Protector

Black-Red

18.99"

20.75"

OPEN :135:

(White or Red open)

CLOSE:86i15:

Gray-Red

36.63"

25.44"

(White or Red open)

19

5-2. OUTDOOR UNIT

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

Parts name

Check points

Thermistor (TH3)

Disconnect the connector then measure the resistance using a tester.

(Surrounding temperature 10:~30:)

<Outdoor pipe>

Thermistor (TH4)

Normal

Abnormal

<Discharge>

TH4

160k"~410k"

Thermistor (TH6)

TH3

<Outdoor 2-phase pipe>

TH6

4.3k"~9.6k"

Open or short

Thermistor (TH7)

TH7

<Outdoor>

TH8

39k"~105k"

Thermistor (TH8)

<Heat sink>

Fan motor(MF1,MF2)

Measure the resistance between the terminals using a tester.

Red

W

(Winding temperature 20:)

White

V

Relay connector

Normal

Abnormal

Black

Red — Black

U

Black — White

15.1±0.5"

Open or short

Pin number of relay

connector is different

White — Red

from that motor

connector

Solenoid valve coil

Measure the resistance between the terminals using a tester.

<Four-way valve>

(Surrounding temperature 20:)

(21S4)

Normal

Abnormal

PUHZ-RP3VHA

PUHZ-RP4, 5, 6VHA

Open or short

2350±170"

1370±100"

Motor for compressor

Measure the resistance between the terminals using a tester.

(MC)

U

(Winding temperature 20:)

Normal

Abnormal

PUHZ-RP3VHA

PUHZ-RP4, 5, 6VHA

Open or short

V

0.865"~0.895"

0.266"

W

Linear expansion valve

Disconnect the connector then measure the resistance using a tester.

( LEV(A),LEV(B) )

(Winding temperature 20:)

Normal

Abnormal

3

M 2

Red

1

(1) - (6)

(1) - (4)

(2) - (5)

(2) - (3)

5

Brown

2

Red - White

Red - Orange

Brown - Yellow

Brown - Blue

Open or short

1

4

Blue

3

6

Orange

4

46±4"

Yellow

5

White

6

Solenoid valve coil

Measure the resistance between the terminals using a tester.

(Surrounding temperature 20:)

<Bypass valve>

(SV)

Normal

Abnormal

1197±10"

Open or short

	5-3. COMPRESSOR TECHNICAL DATA
				(at 20°C)
	Unit		PUHZ-RP3VHA	PUHZ-RP4,5,6VHA
	Compressor model		TNB220FMBH	ANV33FDAMT
	Winding	U-V	0.865 ~ 0.895	0.266
		U-W	0.865 ~ 0.895	0.266
	Resistance
	( " )
		W-V	0.865 ~ 0.895	0.266

20

HOW TO CHECK THE COMPONENTS

<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%

Rt =15exp{3480(		1	–	1	)}
		273+t		273
0:	15k'	30:		4.3k'
10:	9.6k'	40:		3.0k'
20:	6.3k'
25:	5.2k'

Medium temperature thermistor

• Thermistor <Heat sink> (TH8)

Thermistor R50 = 17k' ± 2%

B constant = 4150k' ± 3%

	1			–	1
Rt =17exp{4150(						)}
		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			–	1
Rt =7.465exp{4057(							)}
			273+t			393
20:	250k'	70:				34k'
30:	160k'	80:				24k'
40:	104k'	90:			17.5k'
50:	70k'	100: 13.0k'
60:	48k'	110:				9.8k'

	50
	40
(K")	30
Resistance	20

10

0

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

200

(K")	150
Resistance	100
	50
	0
														50										75										100										125
	25
																Temperature (:)
	500
)	400
(K"	300
Resistance	200
	100
	0

25

50

75

100

120

Temperature (:)

21

Linear expansion valve

(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>

Outdoor controller board

DC12V

LEV

Red

1

	3
M	2
1	5
6	4

Drive circuit

	Brown	2
[4	Blue	3	[4
[3	Orange	4	[3
[2	Yellow	5	[2
[1	White	6	[1
Connector LEV-A
	LEV-B

<Output pulse signal and the valve operation>

Output				Output
(Phase)	1	2	3	4	5	6	7	8
[1	ON	ON	OFF	OFF	OFF	OFF	OFF	ON
[2	OFF	ON	ON	ON	OFF	OFF	OFF	OFF
[3	OFF	OFF	OFF	ON	ON	ON	OFF	OFF
[4	OFF	OFF	OFF	OFF	OFF	ON	ON	ON

(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.)

Valve position (capacity)

		When the valve moves smoothly, there is no noise or vibration
	C	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
Close	Open	valve.

500 pulse

A Opening a valve all the way

B	Pulse number

Extra tightning (about 32 pulse)

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(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	Main body

Lead wire

Stopper

<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.

A

<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

Be sure to attach the stopper to pipe B.

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6 MICROPROCESSOR CONTROL

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.)

System construction

setting	Remote controller
Various	Outdoor unit
	Indoor unit
	Remarks

System construction

setting	Remote controller
Various	Outdoor unit
	Indoor unit
	Remarks

	Standard 1:1					Synchronized twin. Triple
								Outdoor unit; (00)...Refrigerant address
													(SW1; 3~6)
								Indoor unit; (00)–w
						(00)							Indoor unit number
	1				1								(auto setting)
													Refrigerant address
													(receiving from the
													outdoor unit)
	2					2			2		2
	4				4	(00)-1		4	(00)-2		4			(00)-3
	3					3
	Main	Sub				Main	Sub
1Unit (indoor/outdoor) power supply L/N					1Unit (indoor/outdoor) power supply L/N
2Connecting line between the indoor and					2Connecting line between the indoor and
outdoor; S1/S2/S3, Polarized 3-wire					outdoor; S1/S2/S3, Polarized 3-wire
3Remote controller transmission line; Non					3Remote controller transmission line; Non
polarezed 2-wire					polarezed 2-wire
4Auxiliary heater exclusive power supply; L/N					4Auxiliary heater exclusive power supply; L/N
Remote control main/sub setting necessity					Remote control main/sub setting necessity
(In case of 2 remote controllers)					(In case of 2 remote controllers)
No setting					No setting (initial setting)
No setting					No setting (initial setting)
					(1) Indoor unit number is set automatically
			Group control
								Outdoor unit; (00)...Refrigerant address
													(SW1; 3~6)
	(00)		(01)			(02)		Indoor unit; (00)–w
1		1		1									Indoor unit number
													(auto setting)
													Refrigerant address
	2	2	2			2		2					(receiving from the
													outdoor unit)
4	(00)-1 4	(00)-2 4	(01)-1	4		(02)-1	4		(02)-2
3		3		3					3

Main

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

(1)Indoor unit number is set automatically

(2)When the refrigerant address of the unit is "00", Remote controller is supplied.

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(2) The transmitting specification for “A” control

1Wiring regulations

Section	Communications from remote controllers	Communications between indoor and outdoor units
The maximum length of	500m	80m (Including the wiring among indoor units
total wiring		in addition to the wiring between indoor and
		outdoor units)
The maximum numbers	One remote controller can connect and operate	One outdoor unit can connect up to three
for connection	up to 16 indoor units by grouping them. 1	indoor units.
	One group can connect up to two remote controllers.
	1 Remote controller considers multiplex units as
	a single group.
The cables applicable	0.3mm2 to 1.25mm2	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 core wire connected to terminal S2 shall be
	• The wiring that the indoor units of the same	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-			Outdoor unit transmits signals every 3 seconds;
			nals every 7.5 seconds; the indoor unit whose			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			When transmitting error is detected for three con-			When transmitting error is detected for three
communication			secutive minutes.			consecutive minute.
WIRING SPECIFICATIONS FOR 220~240V 50Hz
(INDOOR-OUTDOOR CONNECTING CABLE)
Cross section		Wire size		Number		Polarity	L(m)
of cable			(mm2)	of wires			6
Round		2.5		3	Clockwise : S1-S2-S3		(50)
					w Pay attention to stripe of yellow and green		2
Flat					Not applicable		Not
		2.5		3			applicable
					(Because center wire has no cover finish)
							5
Flat							(45)
		1.5		4	From left to right : S1-Open-S2-S3
							3
Round		2.5		4	Clockwise : S1-S2-S3-Open		60
					w Connect S1 and S3 to the opposite angle		4

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 1.5mm2.4 : 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.

(3C Flat cable 2)

S1 S2 S3

6 : Mentioned cable length is just a reference value.

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

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(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) A measuring example in the sequence of startup

b) A measuring example during normal stop

			7.5		7.5
			seconds
							seconds
Transmission		Transmission		Transmission		Transmission
from		from		from		from
remote		indoor unit		remote		indoor unit
controller				controller

5V/div, 1sec/div:

c) Expanded waveform 1 (signal 111000....)

5V/div, 1sec/div:

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.

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(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) A measuring example the sequence of startup: 1					b) A measuring example in the sequence of startup: 2
	Transmission		Transmission
	from		from
	indoor unit		outdoor unit			Transmission		Transmission
						from		from
						indoor unit		outdoor unit

10V/div, 500msec/div:						10V/div, 500msec/div:
c) A measuring example during normal stop					d) A measuring example during normal stop
(When one outdoor unit connects one indoor unit)					(When one outdoor unit connects two indoor units)
								Transmission		Transmission
								from		from
	Transmission		Transmission			Transmission		one indoor unit		another
	from		from			from				indoor unit
	indoor unit		outdoor unit			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.

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(5) Start-up system

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.

Power ON

1 Refrigerant address
transmitting
2 Refrigerant	YES
address "0"?
	Power supply control
NO	to remote controller

3Set number of the connected unit

4 Set number of the indoor unit

5 Duplication	YES
detection
NO

6 Collecting the unit information

7 Collecting the

operation data

;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”

;If there are 2 or more specified indoor unit, back to the first step.

;Collecting the vane, louver information and transmittance to the remote controller.

;Collecting the preceding operation setting information and transmittance to the remote controller.

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

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

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

Set up finish

<<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.

Example

2 blinking Not lighted 2 blinking

3 seconds

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Function/control specifications

			4-way ceiling cassette	Ceiling concealed
		Item
			PLA-RP•AA	PEA-RP•EA	PEAD-RP•EA
	Fan	Number of fan speed	4	2		2
		Drive method	Pulsation	Tap-changing	Tap-changing
/ specification			(AC motor)	(AC motor)	(AC motor)
	Up/down	Provided		—		—
	auto vane	Swing function		—		—
		Shutter mechanism		—		—
		Moter type	Stepping	—		—
Function
			(12V DC)
	Left/right	Provided	—	—		—
	swing louver	Moter type
			—	—		—
	Drain pump			—
				Note: The parts marked		are optional.

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7		INDOOR UNIT CONTROL
7-1. COOL operation
Control modes					Control details	Remarks
1. Compressor			1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)			w1 The thermoregulating
					• Room temperature ] desired temperature +1:···Compressor ON	function is provided in the
						outdoor unit.
					• Room temperature [ desired temperature ···Compressor OFF	The indoor unit transmits
					Crankcase heater: OFF when compressor operates	the indoor room
						temperature and set
					ON when compressor stopped (including when thermo is OFF)	temperature data to
					Crankcase heater switches ON when 220-240V AC current is applied between	outdoor unit, then the
						outdoor unit controls
					connectors CH 1 and 2 on the outdoor control board.	thermoregulation.
			1-2. Anti-freezing control			Refer to w2.
					Detected condition : When the liquid pipe temperature (TH2 ) or Condenser/	Refer to w3.
					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 antifreezing 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.

2. Fan	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.
		Type	Fan speed notch
		4 speeds type	[Low] [Mid2] [Mid1] [High]
		2 speeds type	[Low]	[High]

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