Daikin RZQ Series FCQ20EVA Service Manual page 126

Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Turn OFF the power supply once and
then turn it ON again.
NO
expansion valve connector
properly connected to the
outdoor unit PCB?
resistance of the electronic
expansion valve normal?
in temperature before and
after electronic expansion valve
temperature sensor
of each thermistor
(suction pipe, discharge pipe,
intermediate heat exchanger and
heat exchanger distributor
Note:
1. Connector and outdoor unit PCB
Connector for electronic expansion valve
CHECK 7 Refer to P.158.
117
Does the error
E9
code " " recur?
YES
Is
the electronic
NO
(∗1)
YES
Is the coil
NO
CHECK 7
YES
Is
there difference
NO
(Y1E) during
operation?
YES
Is the
NO
pipe thermistors)
mounted
properly?
YES
A
X21A
PCB
A1P
SiME281501E
Connect properly.
Replace the coil of the
electronic expansion valve
(Y1E).
Replace the coil of the
electronic expansion valve
(Y1E).
Mount properly.
Service Diagnosis