Troubleshooting by Error Code
SiUS331604E
225
Service Diagnosis
Power transistor check
Perform the following procedures prior to check.
(1) Power Off.
(2) Remove all the wiring connected to the PCB where power transistors are mounted on.
[Preparation]
· Tester
* Preparing a tester in the analog system is recommended.
A tester in the digital system with diode check function will be
usable.
[Point of Measurement and Judgement Criteria]
· Measure the resistance value using a tester at each point of measurement below, 10 minutes later after power OFF.
To use analog tester:
Measurement in the resistance value mode in the range
of multiplying 1 k
Ω
.
To use digital tester:
Measurement is executed in the diode check mode.(
)
No.
Point of
Measurement Judgement
Criteria
Remarks
No.
Point of
Measurement
Judgement
Criteria
Remarks
+
–
+
–
1
P2
U
2 ~ 15 k
Ω
1
P2
U
1.2 V and
over
Due to condenser
charge and so on,
resistance
measurement may
require some time.
2
P2
V
2
P2
V
3
P2
W
3
P2
W
4
U
P2
15 k
Ω
and
above
(including
∞
)
Due to condenser
charge and so on,
resistance
measurement may
require some time.
4
U
P2
0.3 ~ 0.7 V
5
V
P2
5
V
P2
6
W
P2
6
W
P2
7
N3
U
7
N3
U
8
N3
V
8
N3
V
9
N3
W
9
N3
W
10
U
N3
2 ~ 15 k
Ω
10
U
N3
1.2 V and
over
Due to condenser
charge and so on,
resistance
measurement may
require some time.
11
V
N3
11
V
N3
12
W
N3
12
W
N3
CHECK 4
Summary of Contents for VRV IV-S RXTQ-TAVJU Series
Page 1: ...Service Manual SiUS331604E RXTQ36 48 60TAVJU Heat Pump 60 Hz...
Page 254: ...Wiring Diagrams SiUS331604E 241 Appendix RXTQ48TAVJU 3D100496A...
Page 255: ...SiUS331604E Wiring Diagrams Appendix 242 RXTQ60TAVJU 3D100497A...
Page 260: ...Wiring Diagrams SiUS331604E 247 Appendix FXEQ07 09 12 15 18 24PVJU C 3D098557...
Page 267: ...SiUS331604E Wiring Diagrams Appendix 254 FXTQ12 18 24 30 36 42 48 54PAVJU 3D065036G...
Page 270: ...Wiring Diagrams SiUS331604E 257 Appendix VAM1200GVJU 3D073270C...
Page 271: ...Revision History Month Year Version Revised contents 06 2016 SiUS331604E First edition...
