Dc Fan Lock - Daikin 2MXS40H2V1B Service Manual

Troubleshooting for Outdoor Unit
7.8

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
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.16
Refer to P.214
191
The fan does not start in 60 seconds even when the fan motor is running.
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
Foreign matters stuck in the fan
Defective fan motor
Defective outdoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Fan motor connector
disconnected?
NO
Foreign matter 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.
Pulse signal generated?
YES
YES
YES
NO
NO
SiBE121123_A
Turn off the power and
reconnect the connector.
Remove the foreign matter.
Replace the outdoor fan
motor.
Replace the outdoor fan
motor.
Replace the outdoor unit
PCB.
(R15890)
Service Diagnosis