Troubleshooting Si04-402A
86 Service Diagnosis
4.12 Compressor Lock
Remote
Controller
Display
E6
Method of
Malfunction
Detection
A compressor lock is detected by checking the compressor running condition through the
position detection circuit.
Malfunction
Decision
Conditions
The system judges the compressor lock, and stops due to over current.
The system judges the compressor lock, and cannot operation with position detection within
15 seconds after start up.
The system will be shut down if the error occurs 16 times.
Clearing condition: Continuous run for about 10 minutes (normal)
Supposed
Causes
Compressor locked
Compressor harness disconnected
Troubleshooting
Note: If the model doesn’t have SPM, replace the outdoor unit PCB.
Turn off the power. Disconnect the
harnesses U, V and W.
∗ Inverter checker
Part No.: 1225477
Correct the power supply or
replace the SPM.
(Replace the outdoor unit
PCB.)
Replace the compressor.
Check the electronic
expansion valve.
Replace it as required.
Replace the compressor.
(R2842)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
YES
System shut
down after errors repeated
several times?
NO
NO
Normal?
YES
Emergency stop
without compressor
running?
Check with the inverter checker (∗).
Turn off the power and reconnect
the harnesses. Turn on the power
again and get the system restarted.
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