Daikin FTX25JVEA9 Service Manual page 285

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