Daikin FTX25JVEA9 Service Manual page 286

Si18-201
3.3.11 Operation Halt Due to Detection of CT Error
H8
Outdoor Unit
Indication
Method of CT errors are detected using the compressor's operating frequency and the input current
detected by the CT.
Malfunction
Detection
Malfunction When the compressor's rotating speed is 64rps or more and the CT input is 2 A or less.
Decision
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Conditions
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Supposed
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Causes
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Troubleshooting
Check No.11
Refer to P.307
Check No.5
Refer to P.302
Service Diagnosis
When a CT error is generated 4 times, the system shuts down.
(The 4-time counter resets itself when no outdoor unit abnormality occurs within 60 minutes
(cumulative time) after the error generation.)
Incorrect connectors connection
Faulty thermistor
Faulty power transistor
Breaking of wire or faulty connection of internal wiring
Faulty reactor
Faulty PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn the power on again to
re-start the equipment.
Check No. 11
Input current measurement
Is the current
less than 2.00A?
YES
Check No. 5
Internal wiring check (1)
Is it normal?
YES
Check the conductivity of the
compressor coil.
Is it normal?
YES
Troubleshooting - Outdoor Unit Related
NO
NO
NO
Replace the outdoor unit
PCB.
(Control PCB, Filter PCB)
Correct the internal wiring.
Replace the compressor.
Replace the outdoor unit
PCB.
(Control PCB, Filter PCB)
(MF030)
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