Check Si18-525B
396 Troubleshooting
8. Check
Check No. 08 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 circuit, while connector or
relay connector is disconnected.
Check No. 09 Check for Fan Motor Connector (Signal Line)
(1) Turn the power supply off.
(2) With the fan motor connector disconnected, measure the resistance between each pin, then
make sure that the resistance is more than the value mentioned in the following table.
Red
White
Black
U
V
W
Measure the resistance
values between phases
U,V,W.
Measurement point Judgment
1 - 4 1MΩ or more
2 - 4 100kΩ or more
3 - 4 100Ω or more
4 - 7 100kΩ or more
1 White
2 Orange
3 Brown
4 Blue
5
6
7 Red
GND
(S2675)
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