Indoor Fan Motor Abnormality - Daikin RXQ12AHR Service Manual

SiAF341904E
5.5

Indoor Fan Motor Abnormality

5.5.1 Indoor Fan Motor Abnormality (FXFSQ-AR)
Applicable
FXFSQ-AR
Models
A6-10
Error Code
Method of Error  Detection from the current flow on the fan PCB (A1P)
 Detection from the rotation speed of the fan motor in operation
Detection
 Detection from the position signal of the fan motor
 Detection from the current flow on the fan PCB when the fan motor starting operation
Error Decision
 An overcurrent flows
Conditions  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
 Clogged foreign matter
Causes  Disconnection of fan motor connectors
 Fan motor lock
 Defective fan motor
 Defective indoor unit PCB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn OFF the power supply and
wait for 10 minutes.
There is a foreign
matter around the fan.
NO
The fan
motor connector (∗1) is
connected to the indoor unit
main PCB
(A1P).
YES
It is
possible to rotate
the fan manually when the
fan motor connector is
disconnected from the indoor
unit main PCB
(A1P).
YES
Resistance
between UVW of fan
motor is unbalanced, or
short-circuited.
NO
Turn ON the power supply and check
the HAP lamp on the indoor unit
main PCB (A1P).
Go to the next page
A
YES
NO
NO
YES
Troubleshooting by Error Code
Remove the foreign matter.
Connect the connector correctly.
Replace the fan motor.
Replace the fan motor.
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