Mitsubishi PUHZ-P200YHA(3), PUHZ-P250YHA(3) Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

February 2009

No.OCH424

REVISED EDITION-A

SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-P200YHA

PUHZ-P250YHA

PUHZ-P200YHA3

PUHZ-P250YHA3

[Service Ref.]

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

Revision:

•PUHZ-P200/250YHA3 are added in REVISED EITION-A.

•Some descriptions have been modified.

•Please void OCH424.

Note:

•This manual describes only service data of the outdoor units.

•RoHS compliant products have <G> mark on the spec name plate.

CONTENTS

1.		TECHNICAL CHANGES.................................2
2.		REFERENCE MANUAL..................................2
3.		SAFETY PRECAUTION..................................3
4.		FEATURES	......................................................
				6
5.		SPECIFICATIONS...........................................7
6.		DATA............................................................... 8
7.		OUTLINES AND DIMENSIONS....................		10
8.		WIRING DIAGRAM.......................................		11
9.			..........................	12
		WIRING SPECIFICATIONS
10.	REFRIGERANT SYSTEM DIAGRAM...............17
			...................................	19
11. TROUBLESHOOTING
12.			....................................	69
	FUNCTION SETTING
13.	MONITORING THE OPERATION DATABY THE REMOTE CONTROLLER..........			76
14.	EASY MAINTENANCE FUNCTION..............			86
15.	DISASSEMBLY PROCEDURE.....................			89

PARTS CATALOG (OCB424)

PUHZ-P200YHA

PUHZ-P250YHA

PUHZ-P200YHA3

PUHZ-P250YHA3

1 TECHNICAL CHANGES

PUHZ-P200YHA PUHZ-P200YHA3

PUHZ-P250YHA PUHZ-P200YHA3

• OUTDOOR CONTROLLER BOARD (C.B.) has been changed.

(S/W has been changed: Corresponding to the additional combination between PKA-RP•HAL/KAL, PCA-RP•KA and PEAD-RP•JA(L))

2			REFERENCE MANUAL
INDOOR UNIT’S SERVICE MANUAL
	Model name			Service Ref.	Service
					Manual No.
	PLA-RP35/50/60/71/100/125/140BA			PLA-RP35/50/60/71/100/125/140BA(#2).UK
	PLA-RP71/100/125/140BA2			PLA-RP35/50/60/71BA1.UK	OCH412
				PLA-RP71/100/125BA2.UK	OCB412
				PLA-RP140BA2R1.UK
	PCA-RP50/60/71/100/125/140GA			PCA-RP50/60/71/100/125/140GA(#1)	OC328
	PCA-RP50GA2			PCA-RP50GA2(#1)
	PCA-RP71/125HA			PCA-RP71/125HA(#1)	OC329
	PKA-RP35/50GAL			PKA-RP35/50GAL(#1)	OC330
	PKA-RP60/71/100FAL			PKA-RP60/71/100FAL(#1)	OC331
	PKA-RP50FAL2			PKA-RP50FAL2(#1)
	PEAD-RP50/60/71/125/140EA			PEAD-RP50/60/71/125/140EA(#1).UK	HWE0521
	PEAD-RP35/100EA2			PEAD-RP35/100EA2(#1).UK
	PEAD-RP60/71/100GA			PEAD-RP60/71/100GA(#1).UK	HWE0506
	PEA-RP200/250/400/500GA			PEA-RP200/250/400/500GA.TH-AF	HWE0708A
				PEA-RP200/250GA.TH-AFMF
	PKA-RP60/71/100KAL			PKA-RP60/71/100KAL.TH	OCH452
					OCB452
	PCA-RP50/60/71/100/125/140KA			PCA-RP50/60/71/100/125/140KA	OCH454
					OCB454
	PKA-RP35/50HAL			PKA-RP35/50HAL	OCH453
					OCB453

2

3 SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

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

3-2. 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 clean the pipes and make sure that the insides of the pipes are clean.

·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 indoors during installation and 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.

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 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		Flare tool
Charge hose		Size adjustment gauge
Gas leak detector		Vacuum pump adaptor
Torque wrench		Electronic refrigerant
		charging scale

Handle tools with care.

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

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
1	Gauge manifold	· Only for R410A
		· Use the existing fitting specifications. (UNF1/2)
		· Use high-tension side pressure of 5.3MPa·G or over.
2	Charge hose	· Only for R410A
		· Use pressure performance of 5.09MPa·G or over.
3	Electronic scale
4	Gas leak detector	· Use the detector for R134a, R407C or R410A.
5	Adaptor for reverse flow check	· Attach on vacuum pump.
6	Refrigerant charge base
7	Refrigerant cylinder	· Only for R410A · Top of cylinder (Pink)
		· Cylinder with syphon
8	Refrigerant recovery equipment

4

Cautions for refrigerant piping work

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.

1Thickness 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	Outside	Thickness (mm)
dimensions(inch)	diameter (mm)	R410A	R22
1/4	6.35	0.8	0.8
3/8	9.52	0.8	0.8
1/2	12.70	0.8	0.8
5/8	15.88	1.0	1.0
3/4	19.05	—	1.0

2Dimensions 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 its working pressure is higher than that of other refrigerants. 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			(mm)
Nominal	Outside	Dimension A ( -+00.4 )
dimensions(inch)	diameter	R410A	R22
1/4	6.35	9.1	9.0
3/8	9.52	13.2	13.0
1/2	12.70	16.6	16.2
5/8	15.88	19.7	19.4
3/4	19.05	24.0	23.3

			Dimension B
Flare nut dimensions				(mm)
Nominal		Outside	Dimension B
dimensions(inch)		diameter	R410A	R22
1/4		6.35	17.0	17.0
3/8		9.52	22.0	22.0
1/2		12.70	26.0	24.0
5/8		15.88	29.0	27.0
3/4		19.05	36.0	36.0

3Tools 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?	Can R407C tools be used?
Gauge manifold	Air purge, refrigerant charge and	Tool exclusive for R410A
Charge hose	Operation check	Tool exclusive for R410A
Gas leak detector	Gas leak check	Tool for HFC refrigerant
Refrigerant recovery equipment	Refrigerant recovery	Tool exclusive for R410A
Refrigerant cylinder	Refrigerant charge	Tool exclusive for R410A
Applied oil	Apply to flared section	Ester oil, ether oil and		Ester oil, ether oil:
		alkylbenzene oil(minimum amount)		Alkylbenzene oil: minimum amount
Safety charger	Prevent compressor malfunction	Tool exclusive for R410A
	when charging refrigerant by
	spraying liquid refrigerant
Charge valve	Prevent gas from blowing out	Tool exclusive for R410A
	when detaching charge hose
Vacuum pump	Vacuum drying and air	Tools for other refrigerants can	(Usable if equipped	(Usable if equipped
	purge	be used if equipped with adop-	with adopter for rever-	with adopter for rever-
		ter for reverse flow check	se flow)	se flow)
Flare tool	Flaring work of piping	Tools for other refrigerants	(Usable by adjusting	(Usable by adjusting
		can be used by adjusting	flaring dimension)	flaring dimension)
		flaring dimension
Bender	Bend the pipes	Tools for other refrigerants can be used
Pipe cutter	Cut the pipes	Tools for other refrigerants can be used
Welder and nitrogen gas cylinder	Weld the pipes	Tools for other refrigerants can be used
Refrigerant charging scale	Charge refrigerant	Tools for other refrigerants can be used
Vacuum gauge or thermis-	Check the degree of vacuum. (Vacuum	Tools for other refrigerants
tor vacuum gauge and	valve prevents back flow of oil and refri-	can be used
vacuum valve	gerant to thermistor vacuum gauge)
Charging cylinder	Refrigerant charge	Tool exclusive for R410A

: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.

5

4 FEATURES

PUHZ-P200YHA

PUHZ-P250YHA

PUHZ-P200YHA3

PUHZ-P250YHA3

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.

6

5 SPECIFICATIONS

	Service Ref.
	Mode
		Power supply (phase, cycle, voltage)
			Running current	A
			Max. current	A
		External finish
		Refrigerant control
		Compressor
			Model
			Motor output	kW
			Starter type
	UNIT		Protection devices
		Crankcase heater		W
	OUTDOOR
		Heat exchanger
		Fan	Fan(drive) % No.
			Fan motor output	kW
			Airflow	*/min(L/s)

	Defrost method
	Noise level	Cooling	dB
	Dimensions	Heating	dB
		W	mm(in.)
		D	mm(in.)
	Weight	H	mm(in.)
			kg(lbs)
	Refrigerant
	Charge		kg(lbs)
PIPING	Oil (Model)	Liquid	L
	Pipe size O.D.		mm(in.)
		Gas	mm(in.)
REFRIGERANT	Connection method	Indoor side
	outdoor unit	Piping length
		Outdoor side
	Between the indoor &	Height difference

PUHZ-P200YHA		PUHZ-P250YHA
PUHZ-P200YHA3		PUHZ-P250YHA3
Cooling	Heating	Cooling	Heating
	3 phase 50Hz, 400V
9.47	9.88	11.0	12.0
	19	21
	Munsell 3Y 7.8/1.1
	Linear Expansion Valve
		Hermetic
	YHA: ANB52FFJMT or ANB52FFPMT
	YHA3: ANB52FFPMT
	4.7	5.5
		Line start
		HP switch
	Discharge thermo
		—
		Plate fin coil
	Propeller fan % 2
	0.150 + 0.150
		130(2170)
	Reverse cycle
	59	59
	59	59
		950(37-3/8)
	330 + 30(13+1-3/16)
	1,350(53-1/8)
	126(278)	YHA: 133(294)/ YHA3: 135(298)
		R410A
	5.8(12.8)	7.1(15.7)
		2.30(FV50S)
	9.52(3/8)	12.7(1/2)
	25.4(1)	25.4(1)
		Flared

Flared & Brazing

Max. 30m

Max. 70m

7

6 DATA

6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

	Service Ref.			Piping length (one way)							Factory
		10m	20m	30m	40m		50m	60m		70m	charged
	PUHZ-P200YHA	4.8	5.3	5.8	6.7		7.6	8.5	9.4		5.8
	PUHZ-P200YHA3
	PUHZ-P250YHA	5.9	6.5	7.1	8.3		9.5	10.7	11.9		7.1
	PUHZ-P250YHA3
						For pipe longer than 30m, addi-
						tional charge is required.

6-2. COMPRESSOR TECHNICAL DATA

				(at 20°C)
	Unit		PUHZ-P200, 250YHA	PUHZ-P200, 250YHA3
	Compressor model		ANB52FFJMT	ANB52FFPMT
			ANB52FFPMT
	Winding	U-V	0.30	0.30
		U-W	0.30	0.30
	Resistance
	( )
		W-V	0.30	0.30

6-3. NOISE CRITERION CURVES
MICROPHONE	PUHZ-P200YHA
1m	PUHZ-P250YHA						MODE		SPL(dB)	LINE
UNIT	PUHZ-P200YHA3						COOLING		59
	PUHZ-P250YHA3						HEATING		59
	bar)	90
1.5m
GROUND	μ	70
	0.0002=dB
		80
	dB (0									NC-70
		60
	LEVEL,
										NC-60
	PRESSURE	50
										NC-50
		40
	SOUND									NC-40
		30
	BAND									NC-30
		20	APPROXIMATE
	OCTAVE
		10	THRESHOLD OF
			HEARING FOR							NC-20
			CONTINUOUS
			NOISE
			63	125	250	500	1000	2000	4000	8000
				BAND CENTER FREQUENCIES, Hz

8

6-4. STANDARD OPERATION DATA

	Representative matching
	Mode
	Total	Capacty		W
		Input		kW
		Indoor unit
		Phase , Hz
	circuit	Voltage		V
		Input		kW
	Electrical	Current		A
		Outdoor unit
		Phase , Hz
		Voltage		V
		Current		A
		Discharge pressure		MPa
	circuit			(kgf/%)
		Suction pressure		MPa
				(kgf/%)
	Refrigerant	Discharge temperature		°C
		Condensing temperature		°C
		Suction temperature		°C
		Ref. pipe length		m
	side	Intake air temperature	D.B.	°C
			W.B.
	Indoor			°C
		Discharge air temperature	D.B.	°C
	Outdoor side		W.B.	°C
		Intake air temperature	D.B.	°C

SHF

BF

PEA-RP200GA			PEA-RP250GA
Cooling		Heating	Cooling		Heating
19,000		22,400	22,000		27,000
7.21		7.36	8.44		8.47

PEA-RP200GA	PEA-RP250GA
3, 50	3, 50
400	400
1.00	1.18
2.00	2.30

PUHZ-P200YHA			PUHZ-P250YHA
PUHZ-P200YHA3			PUHZ-P250YHA3
	3, 50			3, 50
	400			400
9.47			11.0		12.0
		9.88
2.96		2.59	2.94		2.67
(30.2)		(26.4)	(30.0)		(27.2)
0.87		0.64	0.86		0.62
(8.87)		(6.53)	(8.75)		(6.32)
75.6		73.7	74.8		74.0
49.7		43.2	49.6		45.1
8.0		-0.8	7.1		-2.3
7.5		7.5	7.5		7.5
27		20	27		20
19		15	19		15
17.1		35.7	15.4		39.1
35		7	35		7
24		6	24		6
0.81		—	0.86		—
0.18		—	0.15		—

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

9

10

1 FREE SPACE (Around the unit)

The diagram below shows a basic example.

Explantion of particular details are given in the installation manuals etc.

FREE

2 SERVICE SPACE

Dimensions of space needed for service access are shown in the below diagram.

Over 150

Over

10mm

Ove	r	1000mm

Over	150mm

Over

10mm

Over

10

Service space Over

500

Over 500

3 FOUNDATION BOLTS

Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)

<Foundation bolt height>

than	30
Less		FOUNDATION

4 PIPING-WIRING DIRECTIONS

Piping and wiring connections can be made from 4 directions: front, right, rear and below.

Handle for moving

Example of Notes

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

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

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

			A
	PUHZ-P200YHA	:9.52	447
	PUHZ-P200YHA3	(3/8 inch)
	PUHZ-P250YHA	:12.7	421
	PUHZ-P250YHA3	(1/2 inch)

Air Intake

Piping Knockout Hole Details

Rear Air Intake

Side Air Intake

Side Air Intake

Handle for moving

Handle for moving

				Right piping hole				Power supply wiring hole
								(2-:27Knockout)
	Power supply wiring hole			(Knockout)				Right trunking hole
	(2-:27Knockout)
								(Knockout)				Power supply wiring hole
Front trunking hole 40										45	40
		45				75		40				(2-:27Knockout)
(Knockout)												Rear trunking hole
		55			63				55
												(Knockout)
	:92						:				:92
							92
			6373	2792				6373
Front piping hole											92	Rear piping hole
		27	23	23	73	19	55	23
(Knockout)	92								27
										65		(Knockout)

65

92

Rear Air Intake

175

Side Air Intake

30 330

Air Discharge

Handle for moving

322

1350

635

371

23

81 219

30 220

2-U Shaped notched holes (foundation Bolt M10)

600

175

Installation Feet

2-12%36 oval holes (Foundation Bolt M10) 70

60

950

Earth terminal

370 19	417	P200YHA-PUHZ P250YHA-PUHZ P200YHA3-PUHZ P250YHA3-PUHZ
		56
		40
		0
		53
28
37

Terminal Connections	)
( Left···Power supply wiring
Right···Indoor/Outdoor wiring

Service Panel

Handle for moving

		995	999
Brazing
339	*1 A	*1 439
*2

	Front piping cover
71	Rear piping cover
	71

Bottom piping hole (Knockout)

	145	145	145	Drain hole
				(5-:33)

mm : Unit

DIMENSIONS AND OUTLINES 7

8 WIRING DIAGRAM

PUHZ-P200YHA				PUHZ-P250YHA			PUHZ-P200YHA3	PUHZ-P250YHA3
[LEGEND]
	SYMBOL		NAME			SYMBOL	NAME		SYMBOL	NAME
	TB1		Terminal Block<Power Supply>			TB-L1/L2/L3	Connection Terminal<L1/L2/L3-Power supply>		SWP	Switch<Pump Down>
	TB2		Terminal Block<Indoor/Outdoor>			TB-P1	Connection Terminal		CN31	Connector<Emergency Operation>
	MC		Motor for Compressor			TB-P2	Connection Terminal		LED1,LED2	LED<Operation Inspection Indicators>
	MF1,MF2		Fan Motor			TB-C1	Connection Terminal		F3,F4	Fuse< T6.3AL250V>
	21S4		Solenoid Valve (Four-Way Valve)			TB-N1	Connection Terminal		SS	Connector<Connection for Option>
	63H		High Pressure Switch			X52A	52C Relay		CNM	Connector<A-Control Service Inspection Kit>
	TH3		Thermistor<Outdoor Pipe>		N.F.		Noise Filter Circuit Board		CNMNT	Connector
	TH4		Thermistor<Discharge>			LI1/ LI2/LI3/NI	Connection Terminal<L1/L2/L3/NI-Power supply>			<Connected to Optional M-NET Adapter Board>
	TH6		Thermistor<Outdoor 2-Phase Pipe>			LO1/ LO2/LO3	Connection Terminal<L1/L2/L3-Power supply>		CNVMNT	Connector
	TH7		Thermistor<Outdoor>			GD1,GD2	Connection Terminal<Ground>			<Connected to Optional M-NET Adapter Board>
	LEV-A		Electronic Expansion Valve		C.B.		Controller Circuit Board		CNDM	Connector
	ACL4		Reactor			SW1	Switch<Forced Defrost, Defect History Record			< Connected for Option (Contact Input)>
	DCL		Reactor				Reset, Refrigerant Address>		CN3S	Connector<Connection for Option>
	CB1,CB2		Main Smoothing Capacitor			SW4	Switch<Test Operation>		CN51	Connector<Connection for Option>
	RS		Rush Current Protect Resistor			SW5	Switch<Function Switch>		X51,X52	Relay
	FUSE1, FUSE2		Fuse<T15AL250V>			SW6	Switch<Model Select>
	CY1,CY2		Capacitor			SW7	Switch<Function Setup>
	P.B.		Power Circuit Board			SW8	Switch<Function Setup>
		SC-U/V/W	Connection Terminal<U/V/W-Phase>			SW9	Switch

When M-NET adapter is connected

63H

LEV-A

TH7 TH6

TH3

TH4

M

C. B.

3

5

t

t

t

t

MF1

1

CNF1

+1

+1

7

1

4

1 2

2 1

1

6

1

3

1

5

SW5

SW6

SW7

MS

(WHT)

TH7/6

TH3

TH4

LEV-A

CNVMNT

CNMNT

3~

(RED)

(WHT) (WHT)

(WHT)

(WHT)

(WHT)

SWP SW8

SW9

MF2

1

7

CNF2

SW1

MS

(WHT)

SW4

3~

LED2

LED1

1

CNM

14

CN31

1

3

(WHT)

63H

CN3S (WHT) 3 1

(YLW)

CN4

3

CN2

(WHT)

TRANS

1

(WHT)

7

1 2

CNDM (WHT)

3 1

2

1

2

CNDC

(PNK)

7

CN51 (WHT)

1

CNAC

F3

X52

X51

5

CNS

(WHT)

1

2

(WHT)

3

1

3

1

F4

21S4

SS

3

1

3

4

(GRN)

(WHT)

WHT

RED

21S4

FUSE1

FUSE2

P. B.

7

7

WHT

RED

CN2

(WHT)

MC

1

SC-W

BLK

W

2

SC-V

WHT

V

MS

2

CN4

SC-U

RED

3~

U

1 (WHT)

2

2

CN5

1 (RED)

TB-L3

BLK

TB-L2

WHT

TB-L1

RED

CY1

CY2

BLK

X52A

RS

BLK

TB2

YLW

RED

TB-P1

S1

TB-P2

TB-C1

TB-N1

INDOOR

S2

ORN

DCL

RED

WHT

BLK

BRN

UNIT

S3

CB1

CB2

2

		5					SW11
5		CN5 (WHT)			SW1
		1
			LED2				SW12
			LED3
			LED4
		M-NET SUBSTRATE
		2	CN2M	(WHT)		CND
		1
						(WHT)
			LED5		LED1
						3	1
						3
A	B	S
		TB7
		M-NET

+1 MODEL SELECT

MODEL	SW6	SW5-6 +2
200Y	ON	ON
	OFF	OFF
	1 2 3 4 5 6 7 8	1 2 3 4 5 6
250Y	ON	ON
	OFF	OFF
	1 2 3 4 5 6 7 8	1 2 3 4 5 6

+2 SW5 -1 to 5 : Function Switch

N. F.

				CNAC1
	BREAKER TB1			(WHT) 1	3
	L1	RED	LI 1
POWER	L2	WHT	LI 2 U	U
SUPPLY
3N~	L3	BLK	LI 3	U
400V 50Hz
	N	BLU	NI	U
		GRN/YLW
				U
				GD1	GD2
				BLK	BLK

CNCT (RED) 1 2 1

		U
CNDC 1	3 3	1 CNL
(PNK)		(BLU)
2	WHT	WHT

	CNAC2
3 (RED)
	LO 1	RED
	LO 2	WHT
	LO3	BLK
		M-NET ADAPTER
			SYMBOL	NAME
			TB7	Terminal Block(M-NET connection)
			CN5	Connector<Transmission>
			CND	Connector<Power Supply>
			CN2M	Connector<M-NET communication>
			SW1	Switch<Status of communication>
			SW11	Switch<Address setting:1st digit>
	ACL4		SW12	Switch<Address setting:2nd digit>
			LED1	LED<Power Supply:DC5V>
			LED2	LED<Connection to Outdoor Unit>
			LED3	LED<Transmission:Sending>
			LED4	LED<Transmission:Receiving>
			LED5	LED<Power Supply:DC12V>

11

9

WIRING SPECIFICATIONS

9-1. FIELD ELECTRICAL WIRING (power wiring specifications)

P200, P250

Outdoor unit model

P200, 250

Outdoor unit

Phase

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

Power supply

Frequency & Voltage

400 V

Outdoor unit input capacity

*1

32 A

Main switch (Breaker)

Wiring

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)

Wire No. %

Indoor unit-Outdoor unit earth

1 % Min. 2.5

size(mm²)

Remote controller-Indoor unit

*3

2 % 0.3 (Non-polar)

Outdoor unit L1-N, L2-N, L3-N

AC 230 V

Circuit rating

Indoor unit-Outdoor unit S1-S2

*4

AC 230 V

Indoor unit-Outdoor unit S2-S3

*4

DC 24 V

Remote controller-Indoor unit

*4

DC 12 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.

Caution: Be sure to install N-line. Without N-line, it could damage the unit.

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 fexible 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.

400V

3 phase

		Isolator		3 poles isolator
			S1			S1
A-Control			S2			S2	A-Control
Outdoor Unit							Indoor Unit
			S3			S3

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

Synchronized twin and triple system

Electrical wiring

• Synchronized twin

• Synchronized triple

Outdoor

Outdoor

unit

unit

L1

Indoor

Indoor

L1

Indoor

Indoor

Indoor

L2

unit

unit

L2

unit

unit

unit

1

1

Unit

L3

Remote

Unit

L3

1

Remote

1

1

power

N

Indoor/outdoor

2

controller

2

power

N

2

controller

2

2

supply

supply

Indoor/outdoor

unit connection

S1

cable

S1

S1

connection cable

S1

S1

S1

Earth leakage breaker

Earth leakage breaker

S1

S2

S2

S2

S2

S2

S2

S2

wiring circuit breaker or

S3

S3

S3

wiring circuit breaker or

S3

S3

S3

S3

isolating switch

isolating switch

12

1:1 System (Indoor : PEA-200, 250)

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

Outdoor

Indoor

Outdoor

Indoor

unit

unit

unit No.1

unit

Unit

L1

L1

Unit

Unit

L1

L1

Unit

L2

L2

L2

L2

power

power

supply

L3

L3

supply

power

L3

L3

power

supply

supply

N

N

N

Indoor/outdoor

N

Indoor/outdoor

unit connection

unit connection

cable

S1

cable

S1

S1

S1

Earth leakage breaker

S2

S2

S2

S2

1

Remote

Earth leakage breaker

S3

S3

wiring circuit breaker or

S3

S3

isolating switch

2

controller

wiring circuit breaker or

TB4-1

Outdoor

isolating switch

unit No.2

Unit

L1

1

Remote

L2

2

controller

power

supply

L3

N

Indoor/outdoor

TB4-2

unit connection

S1

cable

S1

S2

S2

S3

S3

9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

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

Simultaneous twin/triple/four system

<For models without heater>
* The optional indoor power supply terminal kit is required.							Outdoor unit power supply
							Earth leakage breaker
	L		L	L	L	L	Wiring circuit breaker or isolating switch
							Outdoor unit
	N		N	N	N	N
							Indoor unit/outdoor unit connecting cales
	S1		S1	S1	S1	S1	Remote controller
							Indoor unit
	S2		S2	S2	S2	S2	Option
	S3		S3	S3	S3	S3	Indoor unit power supply
			1	1	1	1	Indoor unit earth
			2	2	2	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

If the indoor and

box wiring referring to the figure in the right and the DIP switch settings of the

Electric heater

Connectors (connections when shipped

outdoor units have

outdoor unit control board.

from the factory are for indoor unit power

separate power

Indoor unit specifications

(For models with

supplied from outdoor unit.)

supplies, change the

heater)

connections of the

Indoor power supply terminal kit (option)

Required

L

BLUE BLUE

connectors as shown

Indoor unit electrical box connector con-

Required

N

in the following

nection change

YELLOW YELLOW

ORANGE

figure.

CND

CND

Label affixed near each wiring diagram

Required

Indoor unit

Electric heater

S1

for the indoor and outdoor units

control board

S2

(For models with

Outdoor unit DIP switch settings (when

ON

3

S3

heater)

Connectors

using separate indoor unit/outdoor unit

Indoor unit power supplied from outdoor unit

BLUE YELLOW

1

(SW8)

L

power supplies only)

OFF

2

(when shipped from factory)

N

CND

Set the SW8-3 to ON.

YELLOW BLUE

ORANGE

CND

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

S1

Indoor unit

control board

S2

the units according to the wiring method.

S3

	Indoor unit model			RP35~140
	Indoor unit power supply			~/N (single), 50 Hz, 230 V
	Indoor unit input capacity		*1	16 A
	Main switch (Breaker)
	Wiring Wire No. % size (mm2)	Indoor unit power supply		2 %Min. 1.5
		Indoor unit power supply earth		1 %Min. 1.5
		Indoor unit-Outdoor unit	*2	2 %Min. 0.3
		Indoor unit-Outdoor unit earth		–
		Remote controller-Indoor unit	*3	2 % 0.3 (Non-polar)
	Circuit rating	Indoor unit L-N	*4	AC 230 V
		Indoor unit-Outdoor unit S1-S2	*4	–
		Indoor unit-Outdoor unit S2-S3	*4	DC24 V
		Remote controller-Indoor unit	*4	DC12 V

*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.

Separate indoor unit/outdoor unit power supplies

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.

13

9-3. 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	2.5	3	Clockwise : S1-S2-S3	(30)
			* Pay attention to stripe of yellow and green.	*2
Flat	2.5	3	Not applicable	Not applicable
			(Because center wire has no cover finish)	*5
Flat	1.5	4	From left to right : S1-Open-S2-S3	(18)
				*3
Round	2.5	4	Clockwise : S1-S2-S3-Open	(30)
			*Connect S1 and S3 to the opposite angle.	*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 mm2. *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.

(3C Flat cable × 2)

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

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

Indoor/Outdoor separate	Wire No. % Size ($)
power supply	Max. 120m
Indoor unit-Outdoor unit	2 % Min. 0.3
Indoor unit-Outdoor unit earth	—

+ 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 earth or a poor electrical contact at the intermediate connection point.

14

9-4. 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 1.25mm² 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
		M-NET	M-NET	M-NET
	controller
	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)Earth 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 earthing 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 earthing 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 earthing of shield wire)

Central		Power		M-NET type		M-NET type
remote		supply
				outdoor unit		outdoor unit
controller		appliance

M-NET type outdoor unit

M-NET transmission wire

If there are more than 2 earthing spots on the shield wire, noise may enter into the shield wire because the earth wire and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing spots. In case of single spot earthing, noise does not enter into the shield wire because the earth wire and shield wire do not form 1 circuit.

To avoid communication errors caused by noise, make sure to observe the single spot earthing method described in the installation manual.

15

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		Earth
(2)	Connect the wire to the M-NET terminal block. Connect one core of the	block		wire
	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.	M1 M2		S
(3)	In the system which several outdoor units are being connected, the terminal	Transmission		Shield
		wire		part

(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 earth wire on the plate as shown on the right figure.

9-4-1. 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 (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”.)

9-4-2. Refrigerant address setting

<Setting example> M-NET Address No.

SW11

ones

Switng digit setting SW12

tens digit

1

234
01	5
9	7	6
8
2	34
01	5
9	7	6
8

2

234
01	5
9	7	6
8
2	34
01	5
9	7	6
8

~

50

2	34
01	5
9	7	6
8
2	34
01	5
9	7	6
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. [Initial 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
Refrigerant				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

9-4-3. 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	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”.

16

10 REFRIGERANT SYSTEM DIAGRAM

PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3

							Refrigerant flow in cooling
							Refrigerant flow in heating
Ball valve	Service			Service		Outdoor heat exchanger
	port			port			Thermistor
	(check)			(check)
							(TH7)
Refrigerant GAS pipe							Thermistor
:25.4(:1 inch)	Strainer	4-way valve		High pressure			(TH6)
							Thermistor
	(#50)
				protect switch			(TH3)
							Distributor
		Strainer		Muffler
		(#100)			Thermistor
					(TH4)
Accumulator
	Strainer			Compressor
Refrigerant LIQUID pipe	(#40)				Strainer
					(#100)
P200 : :9.52(:3/8 inch)		Strainer
P250 : :12.7(:1/2 inch)			Linear expansion valve
Stop valve		(#100)

(with service port)

17

1. Refrigerant recovering (pump down)

Perform the following procedures to recover refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker).

wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.

2After 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 fan (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1 and LED2 on the control board of the outdoor unit are lit.

wSet the SWP switch (push-button type) to ON in order to perform refrigerant 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 for 3 minutes until compressor stops and set the SWP switch to ON again.

3Because 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.

wIn 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 2 3 minutes later.

wIf 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.

4Turn off the power supply (circuit breaker).

2. 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.

1Set the operation mode (cooling/heating) using SW4-2.		<SW4>
2Turn on SW4-1 to start test run with the operation mode set by SW4-2.
3Turn off SW4-1 to finish the test run.	ON
• There may be a faint knocking sound around the machine room after power is supplied, but this is	OFF
no problem with product because the linear expansion valve is just moving to adjust opening pulse.			1		2
• There may be a knocking sound around the machine room for several seconds after compressor
starts operating. But this is not a problem with product because the check valve itself generates the	Stop			Operation
sound due to small pressure difference in the refrigerant circuit.	Cooling			Heating
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.)

18

11 TROUBLESHOOTING

11-1. 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	Error code	Actions to be taken for service (summary)
	Displayed	Judge what is wrong and take a corrective action according
		to “11-4. Self-diagnosis action table”.
The trouble is reoccurring.
	Not displayed	Conduct troubleshooting and ascertain the cause of the
		trouble according to “11-5. 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
	Logged	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.
The trouble is not reoccurring.
		Re-check the abnormal symptom.
		Conduct trouble shooting and ascertain the cause of the
		trouble according to “11-5. Troubleshooting by inferior
	Not logged	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.

11-2. 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 leakage, 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.

wDo not 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 “Selection of Functions through Remote Controller”.

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

19

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

Displays the remaining test run time.

[TEST] button

Pipe (liquid) temperature

	Operating procedures	While the room temperature display on the remote
		controller is “PLEASE WAIT”, the remote controller is disabled.
	1. Turn on the main power supply.	Wait until “PLEASE WAIT” disappears before using remote controller.
		“PLEASE WAIT” appears for about 2 minutes after power
		supply is turned on. +1
	2. Press TEST button twice.	The		appears on the screen.
			TEST RUN
	3. Press OPERATION SWITCH	Cooling mode: Check if cool air blows and water is drained.
		Heating mode: Check if warm air blows. (It takes a little
	button.
			while until warm air blows.)
	4. Press AIR DIRECTION button.	Check for correct motion of auto-vanes.
	5. Check the outdoor unit fan for	The outdoor unit features automatic capacity control to
	correct running.	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.

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

7.Register the contact number.

•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 and triple operation. Malfunctions may not be displayed regardless of incorrect wiring.

w1 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 flash.

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 w1 written above.

	Symptoms in test run mode		Cause
	Remote Controller Display	OUTDOOR BOARD LED Display
		< > indicates digital display.
	Remote controller displays “PLEASE	After “startup” is displayed, only	• After power is turned on, “PLEASE WAIT” is displayed for 2
	WAIT”, and cannot be operated.	green lights up. <00>	minutes during system startup. (Normal)
		After “startup” is displayed,	• Incorrect connection of outdoor terminal block (L1, L2, L3 and
		green(once) and red(once) blink
	After power is turned on, “PLEASE WAIT”	alternately. <F1>	S1, S2, S3.)
	is displayed for 3 minutes, then error code	After “startup” is displayed,
	is displayed.	green(once) and red(twice) blink	• Outdoor unit’s protection device connector is open.
		alternately. <F3, F5, F9>
		After “startup” is displayed,	• Incorrect wiring between the indoor and outdoor unit (Polarity
	No display appears even when remote	green(twice) and red(once) blink	is wrong for S1, S2, S3.)
		alternately. <EA. Eb>	• Remote controller transmission wire short.
	controller operation switch is turned on.
		After “startup” is displayed, only	• There is no outdoor unit of address 0.
	(Operation lamp does not light up.)
			(Address is other than 0.)
		green lights up. <00>
			• Remote controller transmission wire open.
	Display appears but soon disappears	After “startup” is displayed, only	• After canceling function selection, operation is not possible for
	even when remote controller is operated.	green lights up. <00>	about 30 seconds. (Normal)

w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD display.

LCD	Contents of trouble	LCD		Contents of trouble
P1	Abnormality of room temperature thermistor	U1~UP	Malfunction outdoor unit
P2	Abnormality of pipe temperature thermistor/Liquid	F3~F9	Malfunction outdoor unit
P4	Abnormality of drain sensor/Float switch connector open	E0~E5	Remote controller transmitting error
P5	Drain overflow protection is working.	E6~EF	Indoor/outdoor unit communication error
P6	Freezing/overheating protection is working.	----	No	error history
P8	Abnormality of pipe temperature	FFFF	No applied unit
P9	Abnormality of pipe temperature thermistor/Cond./Eva	PA	Forced compressor stop (due to water leakage abnormality)
Fb	Abnormality of indoor controller board

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

	LED1 (microcomputer power supply)	Lights when power is supplied.
	LED2 (remote controller)	Lights when power is supplied for wired remote controller.
		The indoor unit should be connected to the outdoor unit with address “0” setting.
	LED3 (indoor/outdoor communication)	Flashes when indoor and outdoor unit are communicating.

20

TEST RUN

ON/OFF	TEMP
FAN	AUTO STOP
MODE VANE	AUTO START

,

CHECK LOUVER h

TEST RUN	min
SET	RESET CLOCK

Test run [for wireless remote controller]

Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M".

1 Turn on the main power to the unit.

2Press the TEST RUN button twice continuously.

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

A TEST RUN and current operation mode are displayed.
3 Press the	MODE	(	) button to activate COOL	mode, then
check whether cool air is blown out from the unit.
4 Press the	MODE	(	) button to activate HEAT	mode, then
check whether warm air is blown out from the unit.
5 Press the	FAN	button and check whether strong air is blown out

from the unit.

6Press the VANE button and check whether the auto vane operates properly.

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

Note:

•Point the remote controller towards the indoor unit receiver while following steps 2 to 7.

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

21

11-3. HOW TO PROCEED "SELF-DIAGNOSIS"

11-3-1. 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

ON/OFF button.

(Alternating Display)

Error code (2 or 4 digits)

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.

11-3-2. 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 shut off.

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

Switch to self-diagnosis mode.

Press the CHECK button twice within 3 seconds. The display content will change as shown below.

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] or [00] and [15].

The refrigerant address will begin to flash 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>

Address (3 digits) or unit number (2 digits) <When there is no corresponding unit>

Reset the error history.

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

22

Press the

ON/OFF button twice within 3 seconds. The self-diagnosis

address or refrigerant address will blink.

Cancel self-diagnosis.

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

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.

Press the CHECK button twice within 3 seconds.

Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start of self-diagnosis.

Press the

ON/OFF button.

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

11-3-3. 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 FILTER	button to start self-diagnosis.
	Press the CHECK button for 5 seconds or more. The display content

will change as shown below.

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.

© Transmission is not possible.

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.

[When the remote controller malfunctions]

(Error display 1) "NG" blinks. ©©The remote controller's transmitting-receiv- ing circuit is defective.

The remote controller must be replaced with a new one.

(Error display 3) "ERC" and the number of data errors are displayed. © Data error has occurred.

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.

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 CHECK button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After approximately 30 seconds, the state in effect before the diagnosis will be restored.

23

11-3-4. 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>

			Refrigerant
			address
CHECK			display
CHECK
display
			Temperature
ON/OFF	TEMP		button
ON/OFF
button
	FAN	AUTO STOP
MODE	VANE	AUTO START	HOUR
CHECK	LOUVER	h	button
CHECK TEST RUN		min
button
SET	RESET CLOCK

[Procedure]

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.

4.Point the remote controller at the sensor on the indoor unit and press the ON/OFF 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 intermittent buzzer sound, the operation lamp blinks, and the error code is output.

(It takes 3 seconds at most for error code to appear.)

•The check mode is cancelled.

24

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

Beeper sounds Beep

Beep

Beep

Beep

Beep

Beep

Beep

OPERATION

1st

2nd

3rd

nth

1st

2nd · · · Repeated

INDICATOR

lamp blink

Off

On

On

On

On

Off

On

On

pattern

Self-check Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.

0.5 sec. Approx. 2.5 sec. 0.5 sec.

0.5 sec.

starts

(Start signal

Number of blinks/beeps in pattern indicates the check

Number of blinks/beeps in pattern indicates

received)

code in the following table (i.e., n=5 for “P5”)

the check code in the following table

[Output pattern B]

Beeper sounds Beep
OPERATION
INDICATOR
lamp blink		Off
pattern	Self-check	Approx. 2.5 sec.

starts (Start signal received)

Beep

Beep

Beep

Beep

Beep

Beep

1st

2nd

3rd

nth

1st

2nd · · · Repeated

On

On

On

On

On

Off

On

On

On

Approx. 3 sec.

0.5 sec. 0.5 sec. 0.5 sec.

0.5 sec.

Approx. 2.5 sec.

Approx. 3 sec.

0.5 sec.

0.5 sec.

Number of blinks/beeps in pattern indicates the check

Number of blinks/beeps in pattern indicates

code in the following table (i.e., n=5 for “U2”)

the check code in the following table

[Output pattern A] Errors detected by indoor unit

	Wireless remote controller	Wired remote controller
	Beeper sounds/OPERATION		Symptom	Remark
	INDICATOR lamp blinks	Check code
	(Number of times)
	1	P1	Intake sensor error
	2	P2	Pipe (TH2) sensor error
		P9	Pipe (TH5) sensor error
	3	E6,E7	Indoor/outdoor unit communication error
	4	P4	Drain sensor error/Float switch connector open	As for indoor
	5	P5	Drain pump error
		PA	Forced compressor stop (due to water leakage abnormality)	unit, refer to
				indoor unit's
	6	P6	Freezing/Overheating protection operation
	7	EE	Communication error between indoor and outdoor units	service manual.
	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
	[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
	Wireless remote controller	Wired remote controller
	Beeper sounds/OPERATION		Symptom	Remark
	INDICATOR lamp blinks	Check code
	(Number of times)
	1	E9	Indoor/outdoor unit communication error
			(Transmitting error) (Outdoor unit)
	2	UP	Compressor overcurrent interruption
	3	U3,U4	Open/short of outdoor unit thermistors
	4	UF	Compressor overcurrent interruption (When compressor locked)
	5	U2	Abnormal high discharging temperature/insufficient refrigerant	For details, check
	6	U1,Ud	Abnormal high pressure (63H worked)/Overheating	the LED display
			protection operation	of the outdoor
	7	U5	Abnormal temperature of heatsink	controller board.
	8	U8	Outdoor unit fan protection stop
	9	U6	Compressor overcurrent interruption/Abnormality of power module
	10	U7	Abnormality of superheat due to low discharge temperature
	11	U9,UH	Abnormality such as overvoltage or voltage shortage and
			abnormal synchronous signal to main circuit/Current sensor error
	12	–	–
	13	–	–
	14	Others	Other errors (Refer to the technical manual for the outdoor unit.)

*1 If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and

the OPERATION INDICATOR lamp does not come on, there are no error records.

*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.

25

11-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E. (P.32, 33)

Error Code	Abnormal point and detection method	Case	Judgment and action
		1 No voltage is supplied to terminal	1 Check following items.
		block(TB1) of outdoor unit.	a) Power supply breaker
		a) Power supply breaker is	b), c) Connection of power supply terminal
		turned off.	block (TB1)
		b) Contact failure or disconnec-
		tion of power supply
		terminal
		c) Open phase (L2 or N phase)
		2 Electric power is not supplied to	2 Check connection of the connector (CNDC)
		outdoor controller circuit board.	on the outdoor controller circuit board.
		a) Disconnection of connector	Check connection of the connector CNDC on
None	—	(CNDC)	the outdoor noise filter circuit board.
			Refer to 11-9.
		3 Disconnection of reactor	3 Check connection of reactor. (ACL4)
		(ACL4)
		4 Disconnection of outdoor noise	4 a) Check connection of outdoor noise filter
		filter circuit board or parts fail-	circuit board.
		ure in outdoor noise filter circuit	b) Replace outdoor noise filter circuit board.
		board	Refer to 11-9.
		5 Defective outdoor controller	5 Replace controller board (When items above
		circuit board	are checked but the units cannot be repaired).
	63H connector open	1 Disconnection or contact failure	1 Check connection of 63H connector on
	Abnormal if 63H connector circuit is open	of 63H connector on outdoor	outdoor controller circuit board.
	for 3 minutes continuously after power sup-	controller circuit board	Refer to 11-9.
F5	ply.	2 Disconnection or contact failure	2 Check the 63H side of connecting wire.
	63H: High-pressure switch	of 63H
(5201)		3 63H is working due to defective	3 Check continuity by tester.
		parts.	Replace the parts if the parts are defective.
		4 Defective outdoor controller	4 Replace outdoor controller circuit board.
		circuit board

26

Error Code	Abnormal point and detection method	Case	Judgment and action
	Indoor/outdoor unit connector	1 Contact failure or miswiring of	1 Check disconnection or looseness or polar-
	miswiring, excessive number of units	indoor/outdoor unit connecting	ity of indoor/outdoor unit connecting wire of
	1. Outdoor controller circuit board can	wire	indoor and outdoor units.
	automatically check the number of	2 Diameter or length of indoor/
	connected indoor units. Abnormal if the	outdoor unit connecting wire is	2 Check diameter and length of indoor/outdoor
	number cannot be checked automati-	out of specified capacity.	unit connecting wire.
	cally due to miswiring of indoor/outdoor	3 Excessive number of indoor	Total wiring length: 80m
	unit connecting wire and etc. after power	units are connected to 1 out-	(Including wiring connecting each indoor unit
	is turned on for 4 minutes.	door unit. (5 units or more)	and between indoor and outdoor unit)
	2. Abnormal if outdoor controller circuit	4 Defective transmitting receiving	Also check if the connection order of flat
	board recognizes excessive number of	circuit of outdoor controller	cable is S1, S2, S3.
EA	indoor units.	circuit board	3 Check the number of indoor units that are
		5 Defective transmitting receiving
(6844)
		circuit of indoor controller board	connected to one outdoor unit. (If EA is
		6 Defective indoor power board	detected.)
		7 2 or more outdoor units have
		refrigerant address “0” .	4~6 Turn the power off once, and on again to
		(In case of group control)	check.
		8 Noise has entered into power	Replace outdoor controller circuit board,
		supply or indoor / outdoor unit	indoor controller board or indoor power
		connecting wire.	board if abnormality occurs again.
			7 Check if refrigerant addresses (SW1-3 to
			SW1-6 on outdoor controller circuit board)
			are overlapping in case of group control
			system.
	Miswiring of indoor/outdoor unit	1 Contact failure or miswiring of
	connecting wire (converse wiring or dis-	indoor/outdoor unit connecting	8 Check transmission path, and remove the
	connection)	wire	cause.
	Outdoor controller circuit board can	2 Diameter or length of indoor/
	automatically set the unit number of indoor	outdoor unit connecting wire is	w The descriptions above, 1-8, are for EA, Eb
	units.	out of specified capacity.	and EC.
	Abnormal if the indoor unit number can-	4 Defective transmitting receiving
	not be set within 4 minutes after power on	circuit of outdoor controller circuit
Eb	because of miswiring (converse wiring or	board
(6845)	disconnection) of indoor/outdoor unit con-	5 Defective transmitting receiving
	necting wire.	circuit of indoor controller board
		6 Defective indoor power board
		7 2 or more outdoor units have
		refrigerant address “0”.
		(In case of group control)
		8 Noise has entered into power
		supply or indoor/outdoor unit
		connecting wire.
	Start-up time over	1 Contact failure of indoor/
	The unit cannot finish start-up process	outdoor unit connecting wire
	within 4 minutes after power on.	2 Diameter or length of indoor/
		outdoor unit connecting wire is
		out of specified capacity.
EC		7 2 or more outdoor units have
		refrigerant address “0” .
(6846)
		(In case of group control)
		8 Noise has entered into power
		supply or indoor/outdoor unit
		connecting wire.

27

<Abnormalities detected while unit is operating>

Error Code	Abnormal point and detection method	Case	Judgment and action
	High pressure (High-pressure switch	1 Short cycle of indoor unit	1~6Check indoor unit and repair defect.
	63H worked)	2 Clogged filter of indoor unit
	Abnormal if high-pressure switch 63H	3 Decreased airflow caused by
	worked ( w ) during compressor operation.	dirt of indoor fan
	w 4.15 MPa	4 Dirt of indoor heat exchanger
	63H: High-pressure switch	5 Locked indoor fan motor
		6 Malfunction of indoor fan motor
		7 Defective operation of stop	7 Check if stop valve is fully open.
		valve (Not full open)
		8 Clogged or broken pipe	8 Check piping and repair defect.
		9 Locked outdoor fan motor	9~2 Check outdoor unit and repair defect.
		0 Malfunction of outdoor fan
		motor
		1Short cycle of outdoor unit
		2Dirt of outdoor heat exchanger
U1		3Decreased airflow caused by	3Check the inspected temperature of outside
		defective inspection of outside	temperature thermistor on LED display.
(1302)		temperature thermistor	(SW2 on A-Control Service Tool : Refer to
		(It detects lower temperature	11-10.)
		than actual temperature.)
		4Disconnection or contact failure	4~6Turn the power off and check F5 is
		of connector (63H) on outdoor	displayed when the power is turned again.
		controller board	When F5 is displayed, refer to “Judgment
		5Disconnection or contact failure	and action” for F5.
		of 63H connection
		6Defective outdoor controller
		board
		7Defective action of linear	7Check linear expansion valve.
		expansion valve	Refer to 11-6.
		8Malfunction of fan driving	8Replace outdoor controller board.
		circuit
	High discharging temperature	1 Overheated compressor opera-	1 Check intake superheat.
	(1) Abnormal if discharge temperature ther-	tion caused by shortage of	Check leakage of refrigerant.
	mistor (TH4) exceeds 125: or 110:	refrigerant	Charge additional refrigerant.
	continuously for 5 minutes.	2 Defective operation of stop	2 Check if stop valve is fully open.
	Abnormal if condenser/evaporator tem-	valve
	perature thermistor (TH5) exceeds 40:	3 Defective thermistor	34 Turn the power off and check if U3 is dis-
	during defrosting and discharge temper-	4 Defective outdoor controller	played when the power is turned on again.
	ature thermistor (TH4) exceeds 110:.	board	When U3 is displayed, refer to “Judgement
U2	(2) Abnormal if discharge superheat		and action” for U3.
(1102)		5 Defective action of linear	5 Check linear expansion valve.
	(Cooling: TH4 – TH5 / Heating: TH4 –	expansion valve	Refer to 11-6.
	TH6) exceeds 70: continuously for 10	6 Clogging with foreign objects in	6 After recovering refrigerant, remove water
	minutes.	refrigerant circuit	from entire refrigerant circuit under vacuum
		w Clogging occurs in the parts	more than 1 hour.
		which become below freez-
		ing point when water enters in
		refrigerant circuit.
	Open/short circuit of discharge	1 Disconnection or contact	1 Check connection of connector (TH4) on the
	temperature thermistor (TH4)	failure of connector (TH4) on	outdoor controller circuit board.
	Abnormal if open (3: or less) or short	the outdoor controller circuit	Check breaking of the lead wire for
	(217: or more) is detected during	board	thermistor (TH4). Refer to 11-9.
	compressor operation.	2 Defective thermistor	2 Check resistance value of thermistor (TH4) or
	(Detection is inoperative for 10 minutes		temperature by microcomputer.
			(Thermistor/TH4: Refer to 11-6.)
	of compressor starting process and for 10
			(SW2 on A-Control Service Tool: Refer to
	minutes after and during defrosting.)
			11-10.)
U3
		3 Defective outdoor controller	3 Replace outdoor controller board.
(5104)		circuit board

28