Daikin RTSQ20PY1 Service Manual page 240

Troubleshooting by Indication on the Remote Controller
229
A
The resistors among U, V,
and W are unbalanced or
short circuited.
NO
Remove the signal connector
from the fan motor and check
the resistance (*2).
Between V and GND
CC
terminals, and between GND
and H , H , or H terminals
W V U
are short-circuited.
NO
Turn on the power.
The HAP lamp of the
indoor PCB (A1P) blinks
and the HAP lamp of the
fan PCB (A2P) is off.
NO
*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
(with five conductors).
Connector power wire use (X1A)
5 Red
4
3 White
2
1 Black
Yes
YES
YES
, H , H , or H terminals of the motor connector
CC W V U
Connector signal wire use (X2A)
5 Gray
U
4 Pink
3 Orange
V
2 Blue
1 Yellow
W
SiBE31-801_C
Replace the fan motor.
Replace the fan motor.
Replace the fan PCB
(A2P).
Replace the fan motor.
GND
Vcc
Hw
H
V
H
U
Troubleshooting