Daikin REYQ8-48PY1B, Service Manual

Page: 279 / 477

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 268
NO
YES
Replace the fan motor.
YES
NO
YES
NO
A
Replace the fan motor.
Replace the fan PCB
(A2P).
Replace the fan motor.
The resistors among U, V,
and W are unbalanced or
short-circuited.
Remove the signal connector
from the fan motor and check
the resistance (*2).
Between V
CC
and GND
terminals, and between GND
and H
W
, H
V
, or H
U
terminals
are short-circuited.
Turn on the power.
The HAP lamp of the
indoor PCB (A1P) blinks
and the HAP lamp of the
fan PCB (A2P) is off.
*1. 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%).
*2. Measurement of signal wire connector.
Remove the X2A connector and measure the resistance between
GND and V
CC
, H
W
, H
V
, or H
U
terminals of the motor connector
(with five conductors).
Connector power wire use (X1A) Connector signal wire use (X2A)
5 Red
4
2
3 White
1 Black
U
V
W
5 Gray
4 Pink
2 Blue
3 Orange
1 Yellow
GND
Vcc
H
V
Hw
H
U