Troubleshooting - Outdoor Unit Related Si18-201
272 Service Diagnosis
3.3.10 Fan Position Detection Error
Outdoor Unit
Indication
H7
Method of
Malfunction
Detection
Fan malfunction is detected by checking 3 numbers motor position detection signal.
Malfunction
Decision
Conditions
When the same state with 3 numbers motor position detection signal was kept for 5 seconds.
"
When a fan malfunction is generated 4 times, the system shuts down.
(The 4-time counter resets itself when no outdoor unit abnormality occurs within 60-minute
cumulative time after the malfunction generation.)
Supposed
Causes
"
Incorrect connectors connection
"
Faulty fan PC board
"
Faulty fan motor
Troubleshooting
Check No.4
Refer to P.301
Turn the power supply off.
YES
Correct the connection.
Temporary causes including
noise, etc. are supposed.
Replace fan motor.
Replace fan PC board.
Is the
malfunction
re-generated when turning the
power supply
on again?
NO
YES
Is the motor position
signal output?
NO
(MF029)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Are PC board
connectors and relay
connector correctly
connected?
NO
YES
Check No. 4
Fan motor check
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