Dc Fan Lock - Daikin 2MXS-N Series Service Manual

Troubleshooting for Outdoor Unit
7.9

DC Fan Lock

E7
Error Code
Outdoor Unit LED A
Display
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.172
148
j i i i i
1 2 3 4
The fan does not start in 30 seconds even when the fan motor is running.
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 5 minutes without any other error
Disconnection of the fan motor
Foreign matter 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 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
h
5
YES
YES
NO
NO
Is the fuse ( ) for the
fan motor blown?
YES
SiUS121502E
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)
Service Diagnosis