SiAF341904E
Check
Part 6 Service Diagnosis
301
6.11 Fan Motor Connector Check (Power Supply Cable)
CHECK 16
Check the fan motor connector according to the following procedure.
Outdoor unit
1. Turn OFF the power supply.
2. Measure the resistance between phases of U, V, W at the motor side connectors (3-core
wire) to check that the values are balanced and there is no short circuiting, while connector
or relay connector is disconnected.
Indoor unit
FXMQ50-140PB
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%)
Red
White
Black
W
V
U
Red (5)
— (4)
White (3)
— (2)
Black (1)
U
V
W
Connector power wire use (X1A)
