Hitachi RAC-VJ18PHAE User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
SERVICE MANUAL
TECHNICAL INFORMATION
SPECIFICATIONS
OUTDOOR UNIT
RAC-VJ18PHAE
RAC-VJ25PHAE
RAC-VJ35PHAE
RAC-VJ42PHAE
RAC-VJ50PHAE
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
FOR SERVICE PERSONNEL ONLY
REFER TO THE FOUNDATION MANUAL
CONTENTS
SPECIFICATIONS ----------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 8
MAIN PARTS COMPONENT -------------------------------------------------- 10
WIRING DIAGRAM --------------------------------------------------------------- 12
BLOCK DIAGRAM ---------------------------------------------------------------- 15
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 16
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 18
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 20
SERVICE CALL Q & A ----------------------------------------------------------- 37
TROUBLE SHOOTING ----------------------------------------------------------- 39
PARTS LIST AND DIAGRAM -------------------------------------------------- 52
NO.0148E
JCH-WH
After installation
The performance tests are based on the EN14511、EN14825.
RAC-VJ18PHAE
RAC-VJ25PHAE
RAC-VJ35PHAE
RAC-VJ42PHAE
RAC-VJ50PHAE
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT INDOOR UNIT
RAK-VJ35PHAE RAC-VJ35PHAE RAK-VJ42PHAE RAK-VJ50PHAE
780 7500([phone]
280 548 280 280
227 288([phone]
8.6 31.6 8.8 8.8
DC INVERTER
6.50-7.09
6.00 (2.20 7.30)
20,470 (7,510 24,910)
792(+91)
600
299(+47)
OUTDOOR UNIT
RAC-VJ50PHAE
1 PHASE,50Hz, 220-240V
1,471 (500 2,100)
6.14-6.69
5.00 (1.90 5.20)
17,060 (6,480 17,740)
1,558 (500 2,750)
299(+47)
NET WEIGHT (Kg) 8.6 31.6 8.6 39.5
792(+91)
H280 548 280 600
(B.T.U./h) 8,530 (3,070 10,920) 11,600 (3,070 15,010) 14,330 (3,070 17,060) 18,430 (5,800 20,470)
DIMENSIONS
(mm)
W780 750(+60) 780
2.93-2.81 3.87-3.71 5.05-4.63 5.49-5.99
CAPACITY (KW) 2.50 (0.90 3.20) 3.40 (0.90 4.40) 4.20 (0.90 5.00) 5.40 (1.70 6.00)
8,530 (3,070 10,580) 11,940 (3,070 13,650) 14,330 (5,800 17,060)
HEATING
TOTAL INPUT (W)519 (250 970) 733 (250 1,250) 1,000 (250 1,700) 1,317 (500 2,300)
TOTAL AMPERES (A)
4.35-3.98 4.68-5.10
CAPACITY (KW) 2.00 (0.90 2.50) 2.50 (0.90 3.10) 3.50 (0.90 4.00) 4.20 (1.70 5.00)
(B.T.U./h) 6,820 (3,070 8,530)
POWER SOURCE 1 PHASE,50Hz,220-240V 1 PHASE,50Hz,220-240V 1 PHASE,50Hz,220-240V 1 PHASE,50Hz, 220-240V
COOLING
TOTAL INPUT (W) 419 (250 1,010) 549 (250 1,290) 875 (250 1,460)
OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
MODEL RAK-VJ18PHAE RAC-VJ18PHAE RAK-VJ25PHAE RAC-VJ42PHAE
31.6 39.5
288(+55)D 227 288(+55) 227
548
750(+60)
1,120 (500 1,800)
TOTAL AMPERES (A) 2.46-2.35 3.08-2.95
RAC-VJ25PHAE
OUTDOOR UNIT
TYPE INDOOR UNIT
- 1 -

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DANGER
- 2 -

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
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2. Object parts
฀
฀฀฀฀฀
฀฀฀฀฀฀฀.... 
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
3. Items to be observed in handling
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
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฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀
Fig. 1 Conductive container
฀฀฀฀฀฀


฀฀
Fig. 2 Body earth
฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀
฀฀฀฀฀฀
฀฀฀฀฀฀
฀฀฀฀
฀฀฀฀

Ω
- 3 -

฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
Fig.4 Grounding a solder iron
฀฀฀฀฀฀฀฀฀฀฀
Ω
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀
.฀฀
฀฀
Ω

฀฀

Fig.3 Grounding of the working table
฀฀
฀฀
฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀
- 4 -

..
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀





฀




฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
!
CAUTION
฀
- 5 -

UK
DX1U
SPECIFICATIONS
RAC-VJ18PHAE
RAC-VJ25PHAE
RAC-VJ35PHAE
RAC-VJ42PHAE
RAC-VJ50PHAE
870g
ERZVA9V511,S14K320
1050g
ASD088CKPA71K6B
47W
- 6 -

The refrigerating machine oil is
easily affected by moisture. Use
caution to prevent water from
entering the cycle.
The difference in height between
the indoor and outdoor unit
should be kept below 10m.
The connecting pipe, no matter
big or small, should all be
insulated with insulation pipe and
then wrapped with vinyl tape.
(The insulator will deteriorate if
it is not wrapped with tape).
The connection of insulated drain
hose.
Inner diameter 16mm
Please use insulated drain hose for
the indoor piping (commercial
product)
above 100mm
above 300mm
above 150mm
give clearance
as wide as
possible
above
200mm
above 200mm
Maximum pipe length 20m Minimum pipe length 3m
The clearances of the
unit from top, left, right
and front are specified
in figure below. At least
three of the above sides
must be open air.
Figure showing the installation of Outdoor unit
MODEL RAC-VJ18PHAE/RAC-VJ25PHAE/RAC-VJ35PHAE/RAC-VJ42PHAE/RAC-VJ50PHAE
- 7 -

NOTE:
1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue.
2.The connecting pipe , should all the insulated with insulation pipe.
3.Piping length is within 20m.
4.Height d fferent of the piping between the indoor unit and outdoor unit s ould be within 10m.
h
i
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAC-VJ18/25/35PHAE
Unit : mm
OUTDOOR UNIT

฀฀
฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀
฀
฀฀
฀
฀
0RUH
WKDQ

127(
- 8 -

Unit : mm
More
than
NOTE:
1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue.
2.The connecting pipe , should all the insulated with insulation pipe.
3.Piping length is within 20m.
4.Height d fferent of the piping between the indoor unit and outdoor unit s ould be within 10m.hi
200
More than
More than
300
600
345
299
202
163.5
589
92
59
792
877
55
57
190
147
12
(11)
Drain hole
Drain hole
Drain hole
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAC-VJ42PHAE,RAC-VJ50PHAE
OUTDOOR UNIT
- 9 -

MAIN PARTS COMPONENT
FAN MOTOR
MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT
Fan Motor Specifications
RAC-VJ18/25/35/42/50PHAE
RAC-VJ18/25/35/42/50PHAE
RAC-VJ18/25/35/42/50PHAE
RAC-VJ18/25/35PHAE
RAC-VJ42
DC : 160 - 380V
47W
THERMOSTAT (Room temperature Thermistor)
BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE
GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED
BLK : BLACK PNK : PINK VIO : VIOLET
Ω2780ȍ ℃ )
ȍ
℃
)
/50PHAE
140m
- 10 -

COMPRESSOR MOTOR
!
CAUTION
Compressor Motor Specifications
RAC-VJ18/25/35PHAE RAC-VJ42PHAE
RAC-VJ50PHAE
827W
1350W
220 - 350 V
220 - 350 V
2M = 2.084
2M = 1.354
ASD088CKPA7JK6B
GTD130UKQA8JT6
RAC-VJ42/50PHAE
RAC-VJ18/25/35PHAE
- 11 -

WIRING DIAGRAM
MODEL RAC-VJ18/25/35/42/50PHAE
※2 SOME MODELS NOT NEED TO INSTALL THE CIRCUITS IN DASH DOT.
※3 F1 CURRENT VALUE BE DIFFERENT FOR DIFFERENT MODELS.
- 12 -

外
RAC-VJ18/25/35PHAE
- 13 -

RAC-VJ42/50PHAE
- 14 -

1
2
3
EEPROM
Relay drive circuit
Reversing valve
drive circuit
Electric expansion
valve drive circuit Electric expansion
valve
Reversing valve
Outdoor
Fan motor
Is
Ip
Id
Ip
Id
(AX-21M8G1)
series
Outdoor DC fan motor
drive circuit
Compressor
motor
Compressor
drive circuit
OUTDOOR UNIT
Power source
BLOCK DIAGRAM
MODEL RAC-VJ18/25/35/42/50PHAE
Outdoor microcomputer
Indoor / Outdoor
interface circuit
Power circuit
Control power circuit
Reset circuit
O
ODU Heat Exchange
thermistor
verheat thermistor
Defrost thermistor
Outdoor temperature
thermistor
Oscillator clock
circuit
L
N
Indoor
unit
- 15 -

MODEL RAC-VJ18/25/35PHAE
COOLING CYCLE
OUTDOOR UNIT
HEATING CYCLE
OUTDOOR UNIT
Silencer Silencer
Indoor unit
Indoor unit
Silencer Silencer
Silencer
Silencer
ODU Heat Exchange
thermistor
ODU Heat Exchange
thermistor
- 16 -

MODEL RAC-VJ42/50PHAE
COOLING CYCLE
OUTDOOR UNIT
HEATING CYCLE
OUTDOOR UNIT
Silencer
Silencer
Silencer
Silencer
Silencer
Silencer
Indoor unit
Indoor unit
ODU Heat Exchange
thermistor
ODU Heat Exchange
thermistor
- 17 -

Fig. 2
Fig. 1
Fig. 3
(4)Remove the electrical box fixing screws and
( )
Remove Plock which binds lead wires.
( Set the electrical box upside down.
( Remove P.W.B. fixing screws (1 locations) and
1. Electr cal Part
Radiation fin fixing screw
5
6)
MODEL RAC-VJ18/25/35PHAE
<OUTDOOR UNIT>
Fig. 4
<OUTDOOR UNIT>
MODEL RAC-VJ42/50PHAE
1. Electrical parts
(1)Remove the service value cover lock screws
and lower the cover to remove it.
(2)Remove the top cover lock screw and raise
the cover to remove it.
Fig. 5
Fig. 6
(3)Remove the terminal plate cover.
(1) Remove the upper cover fixing screws and lift the
cover to remove it.
(2) Remove the service valve cover.
(3) Remove the terminal plate cover.
GND wire fixing screw.
radiation fin fixing screws (8 locations), and
remove the P.W.B. from the support.
P.W.B. fixing screw
Procedure for Disassembly and Reassembly
7)
- 18 -

Fig. 8
(4)Lower the right side of the front cover and pull
it forward. Then, remove the cover from the
hook.
(5)Remove the terminal block screw、inductance
line、line clip、earth line.
Fig. 7
Fig. 9
Fig. 10
Fig. 11
Fig. 12
(6)Set the electrical box upside down.
(7)Remove each connector and earth cable from
the lead wire. Then,remove the electrical box.
take the wire out
of the clamp the terminal block screw
earth line
line clip
inductance line
2.The P.W.B.
(1)Remove the the electrical box cover.
detents
detents
(2)Remove the P.W.B. from the support.
detents
- 19 -

RAC-VJ18/25/35PHAE
Main parts
DB601
L N
L N
C021, 600 ,450V)
15
300-330
- 20 -