Troubleshooting by Error Code
SiUS331604E
145
Service Diagnosis
Troubleshooting
Note:
∗
1. Measurement of power wire connector.
Remove the X1A connector from the fan PCB (A2P) and measure the resistance between the U
and V, V and W, and W and U phases of the motor connector (with five conductors) and check
that each phase are balanced (within a permissible dispersion range of ±20%).
∗
2. Measurement of signal wire connector.
Remove the X2A connector and measure the resistance between GND and V
CC
, H
W
, H
V
, or H
U
terminals of the motor connector (with five conductors).
YES
NO
Turn on the power.
Remove the signal connector
from the fan motor and check
the resistance (
∗
2).
The resistance
among U, V, and W are unbalanced
or short circuited.
YES
NO
YES
NO
Replace the fan PCB (A2P).
The HAP
lamp of the indoor
unit PCB (A1P) blinks and
the HAP lamp of the fan
PCB (A2P) is
off.
Between V
CC
and GND
terminals, and between GND
and H
W
, H
V
, or H
U
terminals are
short-circuited.
Replace the indoor fan
motor.
Replace the indoor fan
motor.
Replace the indoor fan
motor.
A
5 Gray
4 Pink
3 Orange
2 Blue
1 Yellow
GND
Vcc
Hw
H
V
H
U
5 Red
4 —
3 White
2 —
1 Black
U
V
W
Connector power wire use (X1A)
Connector signal wire use (X2A)
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...
