Checking Procedure For Other Parts - Hitachi UTOPIA RAS-4HVRP2E Service Manual

10 Troubleshooting
Checking procedure for main parts

10.4.1.4 Checking procedure for other parts

Resistance (Ω)
Part name
Reversing Valve Coil
(4-way solenoid valve)
Compressor
Magnet Contactor

Checking procedure for the reversing valve
Troubleshooting
Is the connector PCN100 on
PCB1 connected correctly?
Is the resistance of the
reversing valve coil correct?
Is there output voltage
generated from the
connector PCN100 on
PCB1?
Reversing valve is faulty (valve
locking, etc.). Replace it with a
new one.
Output voltage
Reversing valve ON
Test lead (+side) pin 1
Test lead (-side) pin 3
Range of voltaje 325 VDC
311 SMGB0136 rev.0 - 07/2021
Model code
VHV-01AP552B1
STF-G01AG579A1
STF-H01AI1870A1
EU1114D9
EU140XA2
EU180XA1
2YC45KXD
EU260X(C1/D2)
E402HHD-36(A/D)2
HB36PHD-(A1/D1)S2
DA50PHD-D1SE2
DA65PHD-D1SE2
FC-0/SP
No
Yes
No
Yes
No
Yes
Reversing valve OFF
?
pin 3
The values may differ depending on testers. Appro-
pin 1
priate output voltage is 70~339VDC
163 VDC
Resistance (Ω)
1473
(at 20ºC)
950
(at 75ºC)
1800
(at 20ºC)
1.138
(at 75ºC)
1.138
(at 75ºC)
1.138
(at 75ºC)
0.644
at 20 ºC
0.490/1.650
(at 20 ºC)
0.460/1.839
(at 75 ºC)
0.434/1.763
(at 75 ºC)
0.396
(at 75 ºC)
0.320
(at 75 ºC)
1150
(at 20ºC)
Connect it correctly.
Reversing valve is faulty
(disconnection, etc.). Replace it
with a new one.
PCB1 is faulty (Faulty reversing
valve circuit, etc.). Replace it
with a new one.
N O T E
10