Daikin VRV RXYQ72-384XAYCA, Service Manual

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SiUS342004EB Check
Part 6 Service Diagnosis 372
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)
to check that the values are balanced and there is no short circuiting, while connector or relay
connector is disconnected.
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,
V-W and W-U.
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)
to check that the values are balanced and there is no short circuiting, while connector or relay
connector is disconnected.
Measure the
resistance values
bet
w een phases
U, V , W .
Red
W hite
Black
W
V
U
Model
Judgment
Black-Red Black-White
FXDQ07-12M 71.0

± 10% 73.5

± 10%
FXDQ18/24M 39.2  ± 10% 41.3  ± 10%
FXHQ12M 71.0

± 10% 73.5

± 10%
FXHQ24/36M 53.5  ± 10% 31.6  ± 10%
Red
White
Black
U
V
W
Measure the
resistance values
between phases
U, V, W.
Red
White
Black
W
V
U