Service Manual

Troubleshooting SiUS091133
117 Service Diagnosis
4.14 DC Fan Lock
Remote
Controller
Display
E7
Method of
Malfunction
Detection
An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC.
Malfunction
Decision
Conditions
 The fan does not start in 15 ~ 30 seconds (depending on the model) even when the fan motor is
running.
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes (09/12 class) or 5 minutes (15/18/24/30/
36 class) without any other error
Supposed
Causes
 Foreign matter stuck in the fan
 Defective fan motor
 Defective outdoor unit PCB
Troubleshooting
Check No.16
Refer to P.148
(R15675)
Caution
YES
YES
NO
YES
NO
NO
YES
NO
Turn on the power.
Rotate the fan.
Check No. 16
Check the rotation pulse input on
the outdoor unit PCB.
Turn off the power and
reconnect the connector.
Remove the foreign
matters.
Replace the outdoor fan
motor.
Replace the outdoor unit
PCB.
Fan motor connector
disconnected?
Foreign matters in or
around the fan?
Replace the outdoor fan
motor.
Fan rotates
smoothly?
Pulse signal generated?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.