Daikin REYQ-TA Series, Service Manual

Page: 194 / 324

Troubleshooting by Error Code SiUS371614E
181 Service Diagnosis
Note:
∗
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).
Replace the indoor fan motor.
YES
NO
Between
Vcc and GND
terminals, and
between GND and Hw,
Hv, or Hu terminals
are short-
circuited.
Replace the indoor fan motor.
YES
Replace the fan PCB (A2P).
YES
NO
The
resistance
among U, V, and W
are unbalanced or
short circuited.
NO
The
HAP lamp
of the indoor unit
PCB (A1P) blinks and
the HAP lamp of the
fan PCB (A2P)
is OFF.
Turn ON the power.
Remove the signal
connector from the fan
motor and check the
resistance (
∗
2).
Replace the indoor fan motor.
A
5 Gray
4 Pink
3 Orange
2 Blue
1 Yellow
GND
Vcc
Hw
H
V
H
U
5 Red
4 —
3 White
2 —
1 Black
U
V
W
Connector power wire use (X1A) Connector signal wire use (X2A)