Dc Fan Lock - Daikin FTX-N Series Service Manual

SiUS091601EA
7.4

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  The fan does not start in 15 ~ 30 seconds even when the fan motor is running.
Conditions  If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes without any other error
Supposed
 Disconnection of the fan motor
Causes  Foreign matter stuck in the fan
 Defective fan motor
 Defective outdoor unit PCB
Troubleshooting
Reference
Check No.16 Refer to P.189
Part 6 Service Diagnosis
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 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
# FU2
YES
YES
NO
NO
Is the fuse (#) for the
fan motor blown?
YES
Troubleshooting for Outdoor Unit
Turn off the power and
reconnect the connector.
Remove the foreign
matters.
Replace the outdoor fan
motor.
NO
Replace the outdoor fan
motor.
Replace the fuse.
Replace the outdoor unit
PCB (main PCB).
(R21669)
158