Dc Fan Lock - Daikin CTX Series Service Manual

DAMA-SM-21-003

4.13 DC Fan Lock

E7
Error Code
Method of Error
An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC.
Detection
 The fan does not start in about 30 ~ 60 seconds (depending on the model) even when the
Error Decision
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes without any other error
 Disconnection of the fan motor
Supposed
 Foreign matter stuck in the fan
Causes
 Defective fan motor
 Defective outdoor unit PCB
Troubleshooting
Reference
Check No.16 Refer to P.88
Service Diagnosis
fan motor is running.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Fan motor connector
disconnected?
NO
Foreign matters in or
around the fan?
NO
Turn on the power.
Rotate the fan.
Fan rotates
smoothly?
YES
Check No. 16
Check the rotation pulse input on
the outdoor unit PCB (main PCB).
Pulse signal generated?
YES
YES
YES
NO
NO
Troubleshooting
Turn off the power and
reconnect the connector.
Remove the foreign
matters.
Replace the outdoor fan
motor.
Replace the outdoor fan
motor.
Replace the outdoor unit
PCB (main PCB).
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