Fan Motor Connector Check (Power Supply Cable) - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB

4.11 Fan Motor Connector Check (Power Supply Cable)

CHECK 16
Check the fan motor connector according to the following procedure.
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
FXSQ54TA, FXSQ54TB, FXMQ15-54PB, FXMQ30-54TB
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%).
Part 6 Service Diagnosis
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%
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%
Connector power wire use (X1A)
Red (5) U
— (4)
White (3) V
— (2)
W
Black (1)
Check
466