Daikin VRV II REYQ8MY1B, Service Manual

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Si39-306 Troubleshooting (OP: Unified ON/OFF Controller)
Troubleshooting 233
Check No. 8 Check on connector of fan motor (Power supply cable)
(1) Turn off the power supply.
Measure the resistance between phases of U,V,W at the motor side connectors (three-core
wire) to check that the values are balanced and there is no short circuiting, while connector
or relay connector is disconnected.
Check No. 9 (1) Turn off the power supply.
(2) Measure the resistance between Vcc and each phase of U,V,W , and GND and each phase
at the motor side connectors (five-core wire) to check that the values are balanced within the
range of ± 20 %, while connector or relay connector is disconnected.
Red
White
Black
U
V
W
Measure the resistance
values between phases
U,V,W.
5 Gray
4 Pink
3 Orange
2 Blue
1 Yellow
GND
Vcc
W
V
U
Measure the resistance
values between Vcc
and U,V,W, and GND
and U,V,W.