Daikin VRV RXYQ72-384XAYCA, Service Manual

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SiUS342004EB Troubleshooting by Error Code
Part 6 Service Diagnosis 236
3.7 Indoor Fan Motor Abnormality
3.7.1 Indoor Fan Motor Abnormality (FXFQ-AA Models)
Applicable
Models
FXFQ-AA
Error Code
A6
Method of Error
Detection

Detection from the current flow on the PCB (A1P)

Detection from the current flow on the PCB when the fan motor starting operation
Error Decision
Conditions

An overcurrent flows

The rotation speed is less than a certain level for 6 seconds.

A position error in the fan rotor continues for 5 seconds or more.
Supposed
Causes

Fan does not rotate due to clogged foreign matter.

Disconnection, short circuit, or loose connection of the harness of the fan motor

Fan motor lock (motor-related or external factors)

Defective fan motor (disconnection or insulation failure)

Defective indoor unit PCB
Troubleshooting
Connect the connector correctly.
Turn OFF the power supply and
wait for 10 minutes.
NO
Turn ON the power supply and
check the HAP lamp on the indoor
unit control PCB (A1P).
YES
NO
Replace the fan motor (M1F).
NO
YES
NO
Replace the fan motor (M1F).
Resistance between UVW
of fan motor is unbalanced, or
short-circuited.
YES
The fan motor
connector ( 1) is connected
to the indoor unit control
PCB (A1P).
Remove the foreign matter.
YES
There is a foreign
matter around the fan.
It is
possible to rotate the
fan manually when the fan
motor connector is disconnected
from the indoor unit control
PCB (A1P).
A
CHECK 16
Caution Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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