Daikin FTX25JVEA9 Service Manual page 284

Si18-201
3.3.9 Operation Halt Due to Faulty Position Detection Sensor
H6
Outdoor Unit
Indication
Method of Faulty start of the compressor is detected by checking the turning information of the compressor
via position detector of electrical parts.
Malfunction
Detection
Malfunction When the compressor did not turn in approximately 15 seconds after starting operation.
Frequency: 4 times
Decision
Clear condition: 60-minute continuous run (normal)
Conditions
"
Supposed
"
Causes
"
"
"
"
Troubleshooting
Check No.6
Refer to P.303
Check No.7
Refer to P.304
Service Diagnosis
Incorrect detection due to disconnected relay of compressor
Malfunction to start due to faulty compressor
Malfunction to start due to faulty outdoor unit PC board
Malfunction to start due to stop valve "closed"
Incorrect detection due to faulty outdoor unit PC board
Input voltage error
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check No. 6
Capacitor voltage check
Is it 300-350V?
YES
Is harness
of electrical parts or
compressor correctly
connected?
YES
Check No. 6
Power transistor check
Is it normal?
YES
Check No. 7
Power transistor output check
Do respective
phases, U,V,W, output in
good balance?
YES
NO Is harness of
electrical parts correctly
connected?
YES
NO
NO
NO
Troubleshooting - Outdoor Unit Related
NO
Correct the connection.
Replace electrical parts.
Correct the connection.
Replace outdoor PC board.
Check harness.
Replace outdoor unit PC
board.
Replace compressor.
(MF028)
271