Indoor Unit Fan Motor Abnormality - Daikin ZQG71~140L7V1B Service Manual

ESIE12-06
4.6

Indoor Unit Fan Motor Abnormality

A6
Remote
Controller
Display
Applicable
All models of indoor unit
Models
Method of Error
Detection of abnormal rotation speed of fan motor by signal from the fan motor
Detection
Error Decision
The error is generated when the rotation speed of the fan motor are not detected while the
Conditions output voltage to the fan is at its maximum.
Supposed
 Defective indoor unit fan motor
Causes  Breaking or disconnection of wire
 Defective contact
 Defective indoor unit PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply.
Wait for 10min.
Is there any
foreign matter around
the fan?
NO
Is the
fan motor harness
connected to indoor unit
PCB (*)?
YES
With
connector for fan
motor (*) disconnected, can
the fan be easily turned
by hands?
YES
CHECK 5
Check for the fan motor connector.
Is
the resistance
between each pins above
judgement
standard?
YES
Note:
 Connector and indoor unit PCB
Model
FCQG
FHQG
CHECK 5 Refer to P.199.
Service Diagnosis
YES
NO
NO
NO
Connector for fan motor
X20A
X20A
Troubleshooting by Remote Controller
Remove the foreign matter.
Connect correctly.
Replace the fan motor.
Replace the fan motor.
Replace the indoor unit PCB.
PCB
A1P
A1P
139