Fan Motor Connector Check (Power Supply Cable) - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

4.11 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)
Indoor Unit
FXFQ-AA
1. Turn the power supply OFF.
2. Disconnect the fan motor connector from the PCB and measure the resistances between U-V,
Judgment: Resistances must be balanced within 20%.
FXDQ-M, FXHQ-M
1. Turn OFF the power supply.
2. Measure the resistance between phases of U, V, W at the motor side connectors (3-core wire)
FXDQ07-12M
FXDQ18/24M
FXHQ12M
FXHQ24/36M
Part 6 Service Diagnosis
to check that the values are balanced and there is no short circuiting, while connector or relay
connector is disconnected.
Red
White
Black
V-W and W-U.
to check that the values are balanced and there is no short circuiting, while connector or relay
connector is disconnected.
Red
White
Black
Model
Black-Red
71.0  ± 10%
39.2  ± 10%
71.0  ± 10%
53.5  ± 10%
U
Measure the
resistance values
V
between phases
U, V, W.
W
Red
U
White V
Black W
U
Measure the
resistance values
V
between phases
U, V, W.
W
Judgment
Black-White
73.5  ± 10%
41.3  ± 10%
73.5  ± 10%
31.6  ± 10%
Check
372