Mitsubishi PUH-4VKSA.UK Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

OUTDOOR UNIT

TECHNICAL & SERVICE MANUAL

Outdoor unit
[Model names] [Service Ref.]

PUH-4VKSA PUH-4VKSA.UK

1999

No.OC184

CONTENTS

1. PART NAMES AND FUNCTIONS·····················2

2. SPECIFICATIONS·············································2

3. DATA··································································3

4. OUTLINES AND DIMENSIONS························4

5. WIRING DIAGRAM ···········································5

6.

REFRIGERANT SYSTEM DIAGRAM

7. DISASSEMBLY PROCEDURE ·························7

8. PARTS LIST······················································9

9. OPTIONAL PARTS··························Back cover

The Slim Line.
From Mitsubishi Electric.

··················6

1 PART NAMES AND FUNCTIONS

PUH-4VKSA.UK

Air intake

Air outlet

Service Ref.

Power supply (phase, cycle, voltage)

External finish
Refrigerant control
Compressor

Heat exchanger

Defrost method
Noise level

Dimensions

Weight
Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

Input
Running current
Starting current

Model
Motor output
Starter type
Protection devices
Cranckcase heater

Fan(drive) o No.
Fan motor output
Airflow

Charge
Oil (Model)

W

D
H

Liquid

Gas
Indoor side
Outdoor side
Height difference
Piping length

OUTDOOR UNIT

REFRIGERANT

PIPING

kW

A
A

kW

kW

CMM

dB(A)
mm(in)
mm(in)
mm(in)
kg(lbs)

kg(lbs)

CC
mm(in)
mm(in)

3.52

16.3
79

PUH-4VKSA.UK

Single, 50Hz, 220~240V

Munsell 5Y 7/1

Capillary tube

Hermetic

NH56VNDT

2.7

Line start

Internal thermostat, thermal switch, Hp switch

38

Plate fin coil

Propeller (direct) o2

0.065+0.065
95

Reverse cycle

54

870(34-1/4)

295+24 (11-5/8 add 1)

1258(49-1/4)

94(207)

R-22

4.2(9.2)

1600 (MS-32)

9.52 (3/8)

19.05(3/4)
Flared
Flared

Max. 50m
Max. 50m

Notes1. Rating Conditions (JIS B8616)

Cooling : Indoor :27¡C(80¡F)DB. 19¡C(66¡F)WB Outdoor :35¡C(95¡F)DB. 24¡C(75¡F)WB
Heating : Indoor :20¡C(68¡F)DB. Outdoor :7¡C(45¡F)DB. 6¡C(43¡F)WB
Refigerant piping length (one way) :5m (16ft)

2. Guaranteed operating range

3. Above values are as follows.
Indoor Unit 1 phase 240V 50Hz
Outdoor Unit 1 phase 240V 50Hz

Indoor
32¡C DB, 23¡C WB
21¡C DB, 15¡C WB

27¡C DB
20¡C DB

Outdoor

43¡C DB

-5¡C DB

24¡C DB, 18¡C WB

-5¡C DB, -6¡C WB

Upper limit
Lower limit
Upper limit
Lower limit

Cooling

Heating

CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED
FOR UP TO 30m PIPING LENGTH AT
SHIPMENT.

The unique refrigerant circuit and a large accumulator
always control the optimal refrigerant level regardless of
the length (50m max. and 5m min.) of piping. The
additional refrigerant charging work during installation
often causes problems. Therefore, it is completely
eliminated. This unique system improves the quality and
reliability of the work done. It also helps to speed up the
installation work.

2 SPECIFICATIONS

2

3 DATA

Service Ref.

5m 10m 15m 20m 25m

Refrigerant pipimg length (one way)

30m 35m 40m 45m 50m

3.5PUH-4VKSA.UK 3.6 3.8 3.9 4.1 4.2 4.4 4.5 4.6 4.8

Outdoor unit PUH-4VKSA.UK

NH56VNDTCompressor Model

0.64

1.55
—

U-V

(R-C)

Winding

Resistance

(')

at 20-C

U-W

(R-C)

W-V

1. REFILLING REFRIGERANT CHARGE (R-22 : kg)

2. COMPRESSOR TECHNICAL DATA

3

150 10

1000For 10 units or less

300

Outdoor Unit-Necessary surrounding clearance

(Concentrated installation)

Outdoor Unit-Necessary surrounding clearance

The upper side must be open.

Handle

for moving

138

95

Rear piping hole

23

33

Rear fresh

air intake

Side air intake

7 24(1)295(11-5/8)

Outlet guide

installation hole

302

Air intake

Air intake

Air outlet

870(34-1/4)

185

(7-9/32)

185

(7-9/32)

500(19-11/16)

330(13)

362(14-1/4)

1715

39.5 27.5

Terminal block for

indoor and outdoor

unit connection

Terminal block for power line

and Ground terminal

300

10

10

10

Note:Allow adequate

upper clearance

100

500

500

Service space

Handle for moving

52461

585

83 524

345

382

403

959

1258(49-1/2)

40 60524

Service panel

Handle

for moving

Refrigerant-pipe flared

connection [19.05 3/4F

Refrigerant-pipe flared

connection [9.52 3/8F

Knock out hole

for front piping

(refrigerant,drainage

and wiring)

Knock out hole

for right piping

(refrigerant,

drainage and wiring)

R20

R20

60

120

4553

25 max.

Knock out holes for

power line 2-[27

Standard bolt length

65

Front right piping holes-

detail figures

80

17

52

57

12

R6

104

39

Bottom

piping hole

2-U-shaped

notched

holes

Drain hole

Drain hole

2-12o23 Oval holes

(standard bolt M10)

Front opening

4 OUTLINES AND DIMENSIONS

PUH-4VKSA·UK Unit : mm (inch)

4

5 WIRING DIAGRAM

DISCHARGE PIPE THERMOSTAT26C

LED(CHECK,SERVICE)

LD1-LD8<O.B>

FUSE(6A)F<O.B>

FAN CONTROLLERFC<O.B>

COMPRESSOR CAPACITOR C2

C1 FAN MOTOR CAPACITOR

CRANKCASE HEATERHC

CONNECTOR(TRANSFORMER)

CN4T<O.B>

WIRES INDOOR/OUTDOOR)

CONNECTOR(CONNECTINGCN3<O.B>

NAMESYMBOL

EARTH

CRANKCASE HEATER RELAYX11<O.B>

OUTDOOR COIL THERMISTORTH

TERMINAL BLOCKTB1,3

TRANSFORMERT

SELECT SWITCH(CHECK,SERVICE)

SW1 • 2 • 3<O.B>

SOLENOID COIL(BYPASS VALVE)21R

OUTDOOR CONTROLLER BOARD

O.B

MF

MC

FAN MOTOR

COMPRESSOR

NAMESYMBOL

HIGH PRESSURE RELAYX16

PROTECT HIGH PRESSURE SWITCH

63H2

CONTROL HIGH PRESSURE SWITCH

63H1

COMPRESSOR CONTACTOR52C

4-WAY VALVE SOLENOID COIL21S4

SURGE ABSORBERZNR<O.B>

SOLENOID COIL RELAYX14<O.B>

SOLENOID COIL RELAY

COMPRESSOR RELAY

X13<O.B>

X12<O.B>

NAMESYMBOL

TO INDOOR UNIT

CONNECTING WIRES

DC 12V

TB3

BRN

ORN

YLW

3

2

1

LED

O.B

LD8

LD7

LD6

LD5

LD4

LD3

LD2THLD1

CN2

12

ON

OFF

SW3

SW2

SW1

CN3

1

2

3

1234

CN4

X11X12X13X14

X11X12X13X14

220V

230V

240V

RED

ORN

YLW

T

AC12.3V

AC

12.3V

BRN

BRN

RED

RED

4

123

CN4T

4

POWER SUPPLY

~

(1PHASE)

220

-

240V 50Hz

N

L

TB1

RED

BLU

RED

BLU

GRN/YLW

RED

C2

S

C

R

RED

WHT

BLK

MC

52C

T3/6

T1/2

L3/5

L1/1

2

6

8

7

GRY

GRY

63H2

X16

X16

GRY

A2

52C

A1

GRY

GRY

HC

WHT

WHT

BLU

BLU

RED

RED

WHT

WHT

F

ZNR

CH52C21S4TRFSV

21R

21
S4

26C

5

1

VLT

VLT

X16

63H2

BLU

BLUBLU

63H1

BLK

BLK

YLW

YLW

BRN

BRN

RST

26C

63H1

51CM

5

MF2

RED

C1

ORN

RED

BLU

WHT

ORN

BLU

WHT

F. C

MF1

1

2

4

3

MF

BRN

C1

YLW

BRN

BLU

WHT

YLW

BLU

WHT

MF

1

2

4

3

26C Overheat protection

63H2 functions

(when both No.1 and No.2 of SW3 are "OFF")

Check Display (flashing)

TH overheat protection
Defective input

Pipe sensor short/open

Compressor indoor command

Crankcase heater ON

Bypass valve ON

4-way valve ON

Outdoor fan ON

Compressor ON

63H1 ON

Heating indoor command

Output Display (light)

LD8

LD7

LD6

LD5

LD4

LD3

LD2

LD1

LED No.

Main functions of LED

● The output display (light) remains during operation

in flashing mode. Pressing the switch again returns

How to use SW1 and SW2

but pressing SW2 displays the past check contents

to output display(light).

stored on the microcomputer.

● Pressing SW1 erases the past check contents

NOTE: If the operation of the protection device stops to function, then check the display flashes.

● Since the indoor and outdoor connecting wires have polarity,make sure to connect the same terminal numbers(1,2,3)for indoor and outdoor units.

●

Since LD8 lights when normal power is turned "ON", check the power supply with the ON or OFF LD8.
w Since the outdoor transformer (T) is connected with 240V power, if 220V or 230V power is used,
change the wiring connections according to the following procedure.

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

CAUTIONS FOR POWER SUPPLY WIRING

● Connect the lead wires according to the colour indication of the sticker on the compressor terminal.

CAUTION FOR SERVICING

RED WHITE

220V

YELLOW

240V

w When Power Supply is 220V

230V

ORANGE

PUH-4VKSA·UK

5

6 REFRIGERANT SYSTEM DIAGRAM

Indoor unit

Outdoor unit

Indoor
heat
exchanger

Thermistor
(TH2)

Strainer

Flexible tube

Service
port
(check)

Accumulator

Ball valve

Strainer

Compressor

Refrigerant pipe
(option)

19.05A({3/4")
(with heat insulator)

Refrigerant pipe
(option)

9.52A({3/8")
(with heat insulator)

Ball valve
(with service port)

Strainer

Bypass
valve

Restrictor
valve

4-way valve

Oil separator

Service
port

High pressure
Control switch

Protective high
pressure switch

Outdoor heat exchanger

Thermistor
TH3

W1(O.D.3.2OI.D.2.0-R820)O2pcs

Distributor
with
strainer

Restrictor
valve

Capillary
tube

Flared
connection

Refrigerant flow in cooling
Refrigerant flow in heating

Thermal
switch
(Discharge)

Capillary
tube W1



PUH-4VKSA·UK

Unit : mm

6

7 DISASSEMBLY PROCEDURE

PUH-4VKSA·UK

OPERATING PROCEDURE PHOTOS

1. Removing the electrical parts

(1)

Remove the 3 screws at the front and 2 screws at the
rear of the top panel.

(2)

Remove the top panel.

(3)

Remove the screw from the panel cover. Unhook the
catches from the side panel and pull the panel cover
toward you to remove.

(4)

Remove the screw from the service panel. Pull down
the service panel to unhook the catches. Pull the
service panel toward you to remove.

Photo 1

Screws

Panel cover

Photo 2

2. Removing the fan motors

(1)

Remove the 3 screws and the front panel.
Open the panel to a 45-degree angle and lift it to
remove. The panel is hooked by 3 catches on the left
side.

(2)

Remove the propeller nuts and the propellers.

(3)

Remove the 3 screws each and the fan motors.
Disconnect the lead connectors.

Screws

Photo 3

Motor support

Terminal block

Separator support plate

High pressure
switch

Propeller
nut

Propeller

7

Valve bed

OPERATING PROCEDURE PHOTOS

3. Removing the heat exchanger and the compressor
NOTE :When removing the panels, move them up and down

to unhook catches.

(1)

Remove the rear panel set screws : 2 screws at the

front, 1 screw on the side, and 3 screws at the rear.

(2)

Remove the valve bed.

(3)

Open the rear panel rearward to remove.

(4)

Remove the 4 screws of the right side panel and
remove it.

(5)

Remove the 3 screws of the rear guard and remove it.

(6)

Remove the 4screws of the separator support plate
and remove it.

(7)

Remove the 2 screws of the motor support and
remove it.

(8)

Remove the 5 screws of the valve bed. Lift the valve
bed to unhook the catches on both sides.

(9)

Remove the electrical parts box.

)

(

Disconnect the connectors of the high-pressure

10

switch, crankcase heater, shell thermo, and fan motor.

(11)

Remove the 2 screws of the separator and remove it.

(12)

Remove the 2 screws of the heat exchanger and

remove it.

(13)

Detach the brazed points of the pipe.

(14)

Remove the 3 nuts of the compressor and remove it.

(15)

Detach the welded points of the suction pipe and

discharge pipe.

Photo 4

Screws

Screws

Photo 5

Heat exchanger

Photo 6

8

Charge plug

Ball valve

Compressor

Accumulator

8 PARTS LIST

STRUCTURAL PARTS
PUH-4VKSA·UK

12

10

13

1

14

96

7

3

2

4

3

4

No.

Part No.

1

S70 020 641

2

S70 004 668

3

S70 001 675

4

S70 A00 655

5

S70 004 661

6

S70 040 662

7

S70 040 682

8

S70 020 658

9

S70 040 698

10

S70 050 130

11

S70 001 686
12
13
14

11

Q'ty/set

Part name

TOP PANEL
FRONT PANEL
FAN GUARD
PANEL HANDLE
SERVICE PANEL
SIDE PANEL
REAR PANEL
PANEL COVER
REAR GUARD
MOTOR SUPPORT

BASE
–
–
–

F.ST SCREW

MOTOR PLATE

LABEL(MITSUBISHI)

Specification

PUH-4

VKSA.UK

1
1
2
3
1
1
1
1
1
1
1

13

1
1

5

Remarks

(Z004M203H10)
(BG00G231G01)
(BC79G510H01)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Price

Amount

8

9

FUNCTIONAL PARTS
PUH-4VKSA·UK

30

29

6 5 3 7 9 8

32

1

23
33

2

1

24

18

13

31

30

17
15

2

34
27

11

14

10

22

19 25 26 21 20

28

10

No.

Part No.

Part name

Specification

Remarks

Unit

Amount

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

Q'ty/set

PUH-4

Price

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

FAN MOTOR
PROPELLER
OUTDOOR CONTROLLER BOARD
D.P ASSY
TERMINAL BLOCK
TERMINAL BLOCK
TRANSFORMER
FAN MOTOR CAPACITOR
COMPRESSOR CONTACTOR
SOLENOID VALVE
SOLENOID COIL
CAPILLARY TUBE
RESTRICTOR VALVE
STRAINER
4-WAY VALVE
DISCHARGE PIPE THERMOSTAT
STRAINER
CHARGE PLUG
CHARGE PLUG
BALL VALVE
BALL VALVE
OIL SEPARATOR
ACCUMULATOR
OUTDOOR COIL THERMISTOR
COMPRESSOR
CRANKCASE HEATER
CONTROL HIGH PRESSURE SWITCH
PROTECT HIGH PRESSURE SWITCH
OUTDOOR HEAT EXCHANGER
NUT
CAPILLARY TUBE
HIGH PRESSURE RELAY
COMPRESSOR CAPACITOR
4WAY COIL

VKSA.UK

2
2
1
1
1
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1

S70 040 763
S70 001 115
S70 A04 315
S70 A01 529
S70 509 716
S70 516 716
S70 106 799
S70 39J 255
S70 956 708
S70 272 428
S70 106 242
S70 A00 425
S70 993 418
S70 42L 450
S70 260 403
S70 A02 201
S70 A11 450
S70 943 413
S70 A01 413
S70 670 411
S70 943 410
S70 A14 490
S70 A12 440
S70 A00 202
S70 610 300
S70 A02 236
S70 A00 208
S70 A04 208
S70 012 408
S70 30L 097
S07 113 425
S70 737 215
S70 040 723
S70 A00 242

O.B

TB1
TB3

T

C1

52C

21R

26C

TH

MC

HC
63H1
63H2

X16

C2

PN6V60-UA

3P(L,N,;)
3P(1,2,3)

4+ 440V
S-N35

{3.2O{2.0O820mm

3/4"
3/8"

NH-56VNDT
240V 38W

M8



{2.5O{0.6O1000A

LY-2F 230V 10A
60

+ 450V

OFF ON

2.55MPa 2.1MPa
OFF ON

3.3MPa 2.1MPa

MF



Part numbers that are circled are not shown in the figure.

11

9 OPTIONAL PARTS

538

537

5247

524

72

7

{6

4 holes

7

7

AIR OUTLET GUIDE

This guide is for changing the outdoor unit air discharge direction. For PUH-4/5/6 type, 2 sets of PAC-292SG are needed.

Part No.

Applied Service

PAC-292SG(1 pc/set
PUH-1.6~6K(S)A type

)

© Copyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Issued in Mar.1999 No.OC184 242 New publication, effective Mar.1999
Printed in Japan. Specifications subject to change without notice.

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO