Mitsubishi PUH-8YE, PUH-10YE Service Manual

				2000
AIR-COOLED HEAT PUMP TYPE
PACKAGED AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

<Outdoor unit>

Models

PUH-8YE, PUH-10YE

(Single and Twin/Triple)

For use with the R22

Contents

			Page
1	SAFETY PRECAUTIONS ...........................................................................................................		1
2	SPECIFICATIONS ......................................................................................................................		3
3	EXTERNAL DIMENSIONS .........................................................................................................		5
4	ELECTRICAL WIRING DIAGRAM .............................................................................................		6
	[1]	Outdoor Unit ........................................................................................................................	6
	[2] Skelton of Indoor/Outdoor Connection ................................................................................		7
5	Technical Data of PUH-8YE/10YE to Meet LVD .......................................................................		8
	[1]	Standard Operation Data .....................................................................................................	8
	[2]	Cooling Capacity Curves .....................................................................................................	9
	[3]	Heating Capacity Curves .....................................................................................................	9
	[4] Capacity Reduction Ratio due to Changes in Piping Length .............................................		10
	[5] Center of Gravity (Outdoor unit) ........................................................................................		11
	[6]	NC Curve (Outdoor unit) ...................................................................................................	12
6	SERVICE DATA ........................................................................................................................		13
	[1]	Appearance of Equipment .................................................................................................	13
	[2]	Refrigerant Circuit ..............................................................................................................	15
	[3] Limitation of Refrigerant Piping Length..............................................................................		15
	[4]	Refrigerant Piping ..............................................................................................................	16
	[5]	Refrigerant Charge ............................................................................................................	16
	[6]	Operation Rage .................................................................................................................	16
7	CONTROL ................................................................................................................................		17
	[1]	Composition of Control ......................................................................................................	17
	[2]	Control specifications .........................................................................................................	17
	[3] Function of switches and connectors (outdoor unit) ..........................................................		21
	[4] Simple parts check method ...............................................................................................		25
	[5]	Reference Data ..................................................................................................................	26
	[6]	Self-diagnosis and troubleshooting ....................................................................................	27
	[7]	TEST RUN .........................................................................................................................	32

1 SAFETY PRECAUTIONS

1. Before installation and electric work

sBefore installing the unit, make sure you read all the “Safety precautions”.

sThe “Safety precautions” provide very important points regarding safety. Make sure you follow them.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user. Caution:

Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed. : Indicates a part which must be grounded.

: Beware of electric shock. (This symbol is displayed on the main unit label.) <Color: yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

•Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

-Inadequate connection and fastening may generate heat and cause a fire.

•Do not touch the heat exchanger fins.

-Improper handling may result in injury.

•If refrigerant gas leaks during installation work, ventilate the room.

-If the refrigerant gas comes into contact with a flame, poisonous gases will be released.

•Have all electric work done by a licensed electrician according to “Electric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

-If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result.

•Securely install the outdoor unit terminal cover (panel).

-If the terminal cover (panel) is not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.

•When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R407C or R22) specified on the unit.

-If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.

•When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

-If the air conditioner is installed improperly, water leakage, electric shock, or fire may result.

•Do not reconstruct or change the settings of the protection devices.

-If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

2. Precautions for devices that use R407C refrigerant

Caution:

•Do not use the existing refrigerant piping.

-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

•Use refrigerant piping made of phosphorus deoxidized copper and copper alloy seamless pipes and tubes. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.

-Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.

•Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

–1–

•Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.

-The refrigerator oil will degrade if it is mixed with a large amount of mineral oil.

•Use liquid refrigerant to fill the system.

-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.

•Do not use a refrigerant other than R407C.

-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

•Use a vacuum pump with a reverse flow check valve.

-The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

•Do not use the following tools that are used with conventional refrigerants.

(Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, refrigerant recovery equipment)

-If the conventional refrigerant and refrigerator oil are mixed in the R407C, the refrigerant may deteriorated.

-If water is mixed in the R407C, the refrigerator oil may deteriorate.

-Since R407C does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.

•Do not use a charging cylinder.

-Using a charging cylinder may cause the refrigerant to deteriorate.

•Be especially careful when managing the tools.

-If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

3. Electrical work

Caution:

•Ground the unit.

-Do not connect the ground wire to gas or water pipes, lightning rods, or telephone ground lines. Improper grounding may result in electric shock.

•The reverse phase of L lines (L1, L2, L3) can be detected (Error cord: F8), but the reverse phase of L lines and N line can be not be detected.

-The some electric parts should be damaged when power is supplied under the miss wiring.

•Use power line cables of sufficient current carrying capacity and rating.

-Cables that are too small may leak, generate heat, and cause a fire.

•Use only a circuit breaker and fuse of the specified capacity.

-A fuse or circuit breaker of a larger capacity or a steel or copper wire may result in a general unit failure or fire.

•Do not wash the air conditioner units.

-Washing them may cause an electric shock.

4. Before starting the test run

Caution:

•Turn on the power at least 12 hours before starting operation.

-Starting operation immediately after turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.

•Do not touch the switches with wet fingers.

-Touching a switch with wet fingers can cause electric shock.

•Do not touch the refrigerant pipes during and immediately after operation.

-During and immediately after operation, the refrigerant pipes are may be hot and may be cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.

•Do not operate the air conditioner with the panels and guards removed.

-Rotating, hot, or high-voltage parts can cause injuries.

•Do not turn off the power immediately after stopping operation.

-Always wait at least five minutes before turning off the power. Otherwise, water leakage and trouble may occur.

Note:

1.The total capacity of connected indoor unit models represents the total sum of the figures expressed in the indoor model name.

2.Combinations in which the total capacity of the connected indoor units exceeds the capacity of the outdoor unit will reduce the capacity of each indoor unit below the rated capacity during simultaneous operation. Therefore, if circumstances allows, combine indoor units within the capacity of the outdoor unit.

–2–

2 SPECIFICATIONS

Specifications of air-source heat pump type packaged air conditioner (Outdoor unit)

Model name					PUH-8YE			Quantity
								Cooling			Heating
Capacity						kcal/h	18,000				19,000
						kW	20.9				22.1
Power source								3N~ 380/400/415 V 50 Hz
Power input						kW	7.62				7.17
Current						A	13.5/13.6/13.7				12.3/12.4/12.5
			Type x Quantity					Propeller fan × 1
Fan			Airflow rate			m3/min				185
			Motor output			kW				0.38
			Type							Hermetic
Compressor			Motor output			kW				5.5
			Crankcase heater			kW				0.05 (240 V)
Refrigerant/Lubricant									R22/MS32(N-1)
External finish							Steel plate paintingwith polyester powder
								(MUNSELL 5Y8/1 or similar)
External dimension						mm		1,715(H) × 990(W) × 840(L)
Protection			High pressure protection			MPa				2.94
device
			Compressor/Fan				Overcurrent protection/Thermal switch
Refrigerant piping diameter					Liquid/Gas	mm		ø12.7 Flare / ø25.4 Flange
Indoor unit										PEH-8YD
Noise level						dB (A)				56
Net weight						kg				205
Operating temperature range							Indoor: 15 °CWB~24 °CWB				Indoor: 15°CDB~27 °CDB
							Outdoor: –5 °CDB~46 °CDB				Outdoor: –12 °CWB~15.5 °CWB
1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.
		Cooling		Indoor:	27 °CDB/19 °CWB		Outdoor:			35 °CDB
Notes:		Heating		Indoor:	20 °CDB		Outdoor:			7 °CDB/6 °CWB
				Pipe length: 7.5 m			Height difference: 0 m

2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation work, Power source switch, and other items not specified in this specifications.

–3–

Specifications of air-source heat pump type packaged air conditioner (Outdoor unit)

Model name					PUH-10YE			Quantity
								Cooling			Heating
Capacity						kcal/h	22,400				24,400
						kW	26.0				28.4
Power source								3N~ 380/400/415 V 50 Hz
Power input						kW	9.47				8.30
Current						A	16.8/16.9/17.0				14.8/14.9/15.0
			Type x Quantity					Propeller fan × 1
Fan			Airflow rate			m3/min				185
			Motor output			kW				0.38
			Type							Hermetic
Compressor			Motor output			kW				7.5
			Crankcase heater			kW				0.06 (240 V)
Refrigerant/Lubricant								R22/MS-32(N-1)
External finish							Steel plate painting with polyester powder
								(MUNSELL 5Y8/1 or similar)
External dimension						mm		1,715(H) × 990(W) × 840(L)
Protection			High pressure protection			MPa				2.94
device			Compressor/Fan				Overcurrent protection/Thermal switch
Refrigerant piping diameter					Liquid/Gas	mm		ø15.88 Flare / ø28.58 Flange
Indoor unit										PEH-10YD
Noise level						dB (A)				57
Net weight						kg				225
Operating temperature range							Indoor: 15 °CWB~24 °CWB				Indoor: 15 °CDB~27 °CDB
							Outdoor: –5 °CDB~46 °CDB				Outdoor: –12 °CWB~15.5 °CWB
1. Cooling/Heating capacity indicates the maximum value at operation under the following condition.
		Cooling		Indoor:	27 °CDB/19 °CWB		Outdoor:			35 °CDB
Notes:		Heating		Indoor:	20 °CDB		Outdoor:			7 °CDB/6 °CWB
				Pipe length: 7.5 m			Height difference: 0 m

2. Works not included: Installation/Foundation work, Electrical connection work, Duct work, Insulation work, Power source switch,and other items not specified in this specifications.

–4–

–5–

12	5				Y
		Note1			Y
		Knockout hole
	50	Bottom piping hole
		237	198	73 80
		Conn. pipe		25	160
		8 : ø 25.4<brazed>
Crosss section Y-Y		10 : ø 28.58<brazed>			Cross section X-X

4 2 - 14 20 Oval hole

215	560	215
	990

Plane view

234

100 251

Knockout hole

Rear view

ø 27 Knockout hole <Left side hole for the control wiring>

Knockout hole Left piping hole

		Knockout hole
		MOOEL	A
		PUH-8YE	12.7
		PUH-10YE	15.88
		Refrig. service
		valve (liquid)
60	75	øA<flare>
	ø 40 Knockout hole			X
	<Left side hole for
	the power supply>
				40
	100	194	149	70

		48	79	83	Knockout hole
		Refrig. service
80	40				Front piping hole
		valve (gas)
		<flange>	31	165

Left side view

Front view

15	< Accessory >
	•	Refrigerant (gas) conn. pipe ···········1 pc.
		(The connecting pipe is fixed with the unit)
	•	Packing for conn. pipe ·················1 pc.
		(Attached near the ball valve)
	•	Conduit mouting plate
840 880	910	(Painted the same color as the unit body)
		ø40,ø33,ø27 ·························each 1pc.
	•	Tapping screw 4 10 ················4 pcs.
	Note	Please leave a space under the outdoor unit
		for the piping When you connect the piping
		from the bottom. ,
15		(Please be careful not to close the hole
		of the bottom plate by the basement)
		Air outlet
	225

	Air
	inlet
1715	Air
1490	inlet

Service panel

X

Right side view

•	3
8YE/10YE-PUH Models	DIMENSIONS EXTERNAL

mm Unit:

4ELECTRICAL WIRING DIAGRAM

[1]Outdoor Unit

• Models PUH-8YE/10YE

					MF
MC			1		3
Red White Black	(3P)						(1P)
			1		4
51C						(4P)
			1	3	5
			CNFAN				1
			(5P)		CNFC2
52C	F.C.
					(6P)
	BOARD						6
			CNPOW
				(5P)
	CNOUT1		1	3	5	1	3
	(5P)
	1						CNOUT2
	3		F10				(3P)
	5			F20
	7				F30
	CNIN				N.F.BOARD
		(7P)

Red White	Black	Blue	Green/Yellow

TB1	L1 L2 L3 N	TB3

					TH1	TH2
					2 1	2 1
		CNVMNT	CNMNT	CN40	CN2	CN3	CN4
1	CN23 (3P)	(3P)	(5P)	(6P)	(2P)	(2P)	(2P)

49C	3									CN3D
	1	CN22 (3P)								(3P)
51C	3		ON							CN3S
	1	CN21 (3P)	OFF	1	4					(3P)
63H1
	3			SW5						CN3N
					ON	ON
52C			X04							(3P)
	1	CN26 (5P)									63H2
					OFF	1 2 OFF	1		6
	3							SW1		CN24
52C			X03		SW3	SW4					3
	5									(3P)	1
	1	CN25 (3P)	LED1			ON				CN27
CH	3					OFF
							1		6	(3P)
								SW2
		CN53 (3P)	X01
	1
21S4	3									CN81	3
	1	CN52 (6P)	X02							(3P)	1
SV1			X05
	5									CN51
	1	CNFC1 (6P)								(5P)
	6
L1	7	CN20(7P)
N		F01					DC power supply
		F04
L2
L3	1	F02
		F03
			CNFG			CN28		CN34
			(3P)			(3P)		(3P)
Unit body		3	1			3	1	3		1

TR

		1 2 3	Controller Box
L1 L2 L3	N	To indoor unit

Power source 3N~ 380/400/415 V 50 Hz

NOTE SW5-4 IS OFF IN CASE OF PUH-8YE.

SW5-4 IS ON IN CASE OF PUH-10YE.

ON

ON

OFF

OFF

1 4

1 4

SW5

SW5

PUH-8YE PUH-10YE

Note:

1.Be sure to apply earth work to the unit. (Use the earth terminal of TB1.)

Symbol Explanation

	Symbol		Name
	F01~F04	FUSE (6.3A 250VAC CLASS F)
	F10~F30	FUSE (6.3A 250VAC CLASS F)
	51C	OVER CURRENT RELAY
	52C	MAGNETIC CONTACTOR (COMPRESSOR)
	63H1	PRESSURE SWITCH (HIGH PRESSURE)
	63H2	PRESSURE SWITCH (FOR CONTROL)
	TR	TRANSFORMER
	MC	ELECTRIC MOTOR OF COMPRESSOR
	MF	FAN MOTOR (HEAT EXCHANGER)
	CH	CRANK CASE HEATER (COMPRESSOR)
	X01~X05	RELAY
	SW1~5	SWITCH
	21S4	4-WAY VALVE
	SV1	SORENOID VALVE
	TH1	THERMISTOR	LIQUID TEMP
	TH2		DISCHARGE TEMP
	TB1	POWER SOURCE TERMINAL BLOCK
	TB3	INDOOR/OUTDOOR CONNECTION TERMINAL
		BLOCK
	49C	THERMAL SWITCH (COMPRESSOR)
		EARTH TERMINAL

–6–

[2]Skelton of Indoor/Outdoor Connection

(1)Multiple systems combination chart

PUH-8YE

PUH-10YE

PEH-8YD

PEH-10YD

units

PLH-1.6, 2, 2.5KK(H)B

PLH-2, 2.5KK(H)B

PLH-3AK(H), PLH-4AK(H)S

PLH-3AK(H), PLH-4, 5AK(H)S

Indoor

PKH-1.6, 2, 2.5, 3FK(H)A, PKH-4FK(H)SA

PKH-2, 2.5, 3FK(H)A, PKH-4FK(H)SA

PCH-2, 2.5, 3GK(H)A, PCH-4GK(H)SA

PCH-2, 2.5, 3GK(H)A, PCH-4, 5GK(H)SA

PEH-2.5, 3, EKHA, PEH-4EKHSA

PEH-2.5, 3EKHA, PEH-4, 5EKHSA

PEHD-1.6, 2, 2.5, 3EK(H)A, PEHD-4EK(H)SA

PEHD-2, 2.5, 3EK(H)A, PEHD-4, 5EK(H)SA

Single

Twin

Triple

Single

Twin

Triple

Systems

Model

Ratio

Model

Ratio

Model

Model

Ratio

Model

Ratio

Model

33:33:33

2.5+2.5+2.5

33:33:33

3+3+3

8

50:50

4+4

25:25:50

2+2+4

10

50:50

5+5

25:25:50

2.5+2.5+5

20:40:40

1.6+3+3

20:40:40

2+4+4

(2) Multiple-distributor pipes (option)

Twin

Triple

Ratio of indoor units

50:50

33:33:33

25:25:50

20:40:40

Multiple-distributor

SDD-50WJ-E

SDT-111J-E

SDT-112J-E

SDT-122J-E

(3)System

Single

Indoor unit

3-core cable (DC12V)

Transmission line

Remote controller

Outdoor unit Pipework

Twin

Triple

Indoor units

Indoor units

No. 1

No. 2

No. 1

No. 2

No.3

3-core cable (DC12V)	Transmission	3-core cable (DC12V)	Transmission
	line		line

Distributor

Remote

Distributor

controller

Remote

controller

Outdoor unit	Outdoor unit
Pipe work	Pipe work

–7–

5Technical Data of PUH-8YE/10YE to Meet LVD

[1]Standard Operation Data

1 PUH-8YE

		Operating condition				Cooling			Heating
	condition	Voltage		V	380	400	415	380	400	415
		Power source frequency		Hz	50	50	50	50	50	50
		Indoor air condition (DB/WB)		°C	27/19	27/19	27/19	20/–	20/–	20/–
	Operating	Outdoor air condition (DB/WB)		°C	35/-	35/–	35/–	7/6	7/6	7/6
		Piping length		m	7.5	7.5	7.5	7.5	7.5	7.5
		Refrigerant charge		kg	7.4	7.4	7.4	7.4	7.4	7.4
	characteristics		Current	A	13.5	13.6	13.7	12.3	12.4	12.5
		Outdoor unit	Input	kW	7.62	7.62	7.62	6.91	6.91	6.91
			Compressor current	A	12.4	12.5	12.6	11.2	11.3	11.4
			Fan current	A	1.1	1.1	1.1	1.1	1.1	1.1
	Electrical
		Indoor unit	Current	A	1.12	1.12	1.12	1.12	1.12	1.12
			Input	kW	0.65	0.65	0.65	0.65	0.65	0.65
		Discharge pressure		MPa	1.99	1.99	1.99	1.59	1.59	1.59
	circuit
		Suction pressure		MPa	0.49	0.49	0.49	0.35	0.35	0.35
		Discharge refrigerant temperature		°C	85	85	85	75	75	75
	Refrigerant
		Suction refrigerant temperature		°C	7	7	7	–2	–2	–2
		Liquid pipe temperature (at piping sensor)		°C	46	46	46	5	5	5
		Compressor shell bottom temperature		°C	50	50	50	35	35	35

Note: The values listed above indicate that when connected with the indoor unit PEH-8YD as representative data.

2 PUH-10YE

		Operating condition				Cooling			Heating
	condition	Voltage		V	380	400	415	380	400	415
		Power source frequency		Hz	50	50	50	50	50	50
		Indoor air condition (DB/WB)		°C	27/19	27/19	27/19	20/–	20/–	20/–
	Operating
		Outdoor air condition (DB/WB)		°C	35/-	35/–	35/–	7/6	7/6	7/6
		Piping length		m	7.5	7.5	7.5	7.5	7.5	7.5
		Refrigerant charge		kg	7.6	7.6	7.6	7.6	7.6	7.6
	characteristics		Current	A	16.8	16.9	17.0	14.8	14.9	15.0
		Outdoor unit	Input	kW	9.47	9.47	9.47	8.30	8.30	8.30
			Compressor current	A	15.7	15.8	15.9	13.7	13.8	13.9
	Electrical		Fan current	A	1.1	1.1	1.1	1.1	1.1	1.1
			Input	kW	0.94	0.94	0.94	0.94	0.94	0.94
		Indoor unit	Current	A	1.64	1.64	1.64	1.64	1.64	1.64
		Discharge pressure		MPa	2.03	2.03	2.03	1.57	1.57	1.57
	circuit
		Suction pressure		MPa	0.48	0.48	0.48	0.34	0.34	0.34
	Refrigerant	Discharge refrigerant temperature		°C	95	95	95	80	80	80
		Suction refrigerant temperature		°C	8	8	8	–2	–2	–2
		Liquid pipe temperature (at piping sensor)		°C	47	47	47	6	6	6
		Compressor shell bottom temperature		°C	60	60	60	40	40	40

Note: The values listed above indicate that when connected with the indoor unit PEH-10YD as representative data.

–8–

[2] Cooling Capacity Curves

• PUH-8YE/10YE

1.4

		Indo
		or inlet
		air
		w
		et
		b
		ul
		b
		t
	1.2	e	mp.	°
				<
				C
					W
					B
					>
ratio
					22
Capacity	1
						20
	0.8					18
					16

0.6

-5 -3 -1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 Outdoor air temp. <°CDB>

Input ratio

1.22

1.1

0.9

0.7

-5 -3 -1

22

20

18

16

										>
										B
										W
									C
								°
								<
							.
							p
							m
							te
							lb
							u
							b
						t
						e
					w
				ir
			t	a
		le
	r	in
oo
Ind

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 Outdoor air temp. <°CDB>

[3]

Heating Capacity Curves

• PUH-8YE/10YE

1.4

15

20

1.2

25

>

B

ratio

r

D

°

C

<

e

u

t

Capacity

d

a

r

1

e

m

p

te

lb

u

b

y

r

ir

a

t

le

in

r

o

o

0.8

I

d

n

0.6

-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 15.5

Outdoor air temperature <°CWB>

	1.4																	25
	1.2																	20
											°	CDB>
																		15
ratio											<
										temperature
Input	1
								bulb
						air	dry
					inlet
	0.8			Indoor
	0.6
			-10 -8 -6 -4 -2 0 2 4 6 8											10 12 14 15.5
	-12

Outdoor air temperature <°CWB>

–9–