Daikin Aurora Series, Service Manual

Page: 312 / 333

Check SiUS341802E
299 Service Diagnosis
3.11 Fan Motor Connector Check (Power Supply Cable)
(1) Turn OFF the power supply.
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.
3.12 Fan Motor Connector Check (Signal Cable)
RXLQ72-120TATJU, RXLQ72-120TAYDU only
(1) Turn OFF the power supply.
(2) Measure the resistance between Vcc and each phase of U, V, W, and GND and each phase at
the motor side connectors (5-core wire) to check that the values are balanced within the range
of ± 20 %, while connector or relay connector is disconnected.
Furthermore, to use a multimeter for measurement, connect the probe of negative pole to Vcc
and that of positive pole to GND.
CHECK 16
Measure the
resistance values
between phases
U, V, W.
Red
White
Black
W
V
U
CHECK 17
Measure the
resistance values
between Vcc and
U, V, W, and GND and
U, V, W.
GND
Vcc
W
V
U
5 Gray
4 Pink
3 Orange
2 Blue
1 Yellow