Troubleshooting for Outdoor Unit Si18-525B
370 Troubleshooting
7.5 Malfunction of Outdoor Unit Fan Motor
Remote
Controller
Display
E7
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction of fan motor system is detected according to the fan speed detected by Hall IC
when the fan motor runs.
Malfunction
Decision
Conditions
When the fan runs with speed less than a specified one for 14.5 seconds or more when the
fan motor running conditions are met
When malfunction is generated 4 times, the system shuts down.
Supposed
Causes
Malfunction of fan motor
The harness connector between fan motor and PCB is left in disconnected, or faulty
connector
Fan does not run due to foreign matters tangled
Clearing condition: Operate for 5 minutes (normal)
Troubleshooting
Connector
of fan motor is
disconnected.
YES
NO
NO
YES
Can the fan
be turned smoothly
with hand after disconnect
the connector of
fan motor?
Is there any
obstacle around
the fan?
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connect the connector.
Remove the obstacle.
Replace the fan motor of
outdoor unit.
Check No. 11
Check on pulse input of
position signal of fan inverter
PCB
Check No. 9
Check on connector of fan
motor (Power supply cable)
YES
NO
Replace the fan motor of
outdoor unit.
Replace outdoor unit PCB.
(Q0385)
Is the pulse inputted?
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