Daikin VRV III, Руководство по обслуживанию, Страница: 474 / 567

SiUS34-801A_b Troubleshooting (OP: Unified ON/OFF Controller)
Troubleshooting 459
[CHECK
1]
Check on connector of fan motor (Power supply cable)
(1) Turn off the power supply.
While disconnected, measure the resistance between phases U,V,W at the motor side
connectors (3-conductor wire) to check that the values are balanced and that there is no short
circuiting.
[CHECK
2]
(1) Turn off the power supply.
(2) While disconnected, 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 %.
To use a multiple meter for measurement, connect the probe of negative pole to Vcc and that of
positive pole to GND.
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.