Daikin J Series Service Manual Page 246

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SiE18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 235
3.3.23 Integrated Input Current Stop
Outdoor Unit
Indication
L7
Method of
Malfunction
Detection
Abnormality of integrated input current is detected using integrated input current detected by the
CT.
Malfunction
Decision
Conditions
When the integrated input current of 31A. continued for 2.5 seconds
When an integrated input error 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 error generation.)
Supposed
Causes
Faulty compressor
Overcurrent due to faulty PC board
Incorrect detection due to faulty PC board
Short-circuit
Troubleshooting
Check No.5
Refer to P.251
Check No.6
Refer to P.252
Check No.7
Refer to P.253
Check No.1
Refer to P.249
Check No.2
Refer to P.249
Check No. 5
Main circuit wiring
connection check
YES
Replace control PC board,
filter PC board
Apply required remedy
subject to the case.
Apply required remedy
subject to the case.
Apply required remedy
subject to the case.
When halting,
does the current stated
left flow?
(MF042)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Measure input current with
Check No. 6
Power transistor check
Check No. 7
Power transistor output check
NO
YES
Check No. 1
Installation conditions check
YES
Check No. 2
Discharge pressure check
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