Indoor Fan Motor Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB
3.7

Indoor Fan Motor Abnormality

3.7.1 Indoor Fan Motor Abnormality (FXFQ-AA Models)
Applicable
FXFQ-AA
Models
A6
Error Code
Method of Error
 Detection from the current flow on the PCB (A1P)
Detection  Detection from the current flow on the 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
 Fan does not rotate due to clogged foreign matter.
Causes
 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
Part 6 Service Diagnosis
Caution Be sure to turn off the power switch before connecting or disconnecting
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 control
PCB (A1P).
YES
It is
possible to rotate the
fan manually when the fan
motor connector is disconnected
from the indoor unit control
PCB (A1P).
YES
CHECK 16
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 control 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 (M1F).
Replace the fan motor (M1F).
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