Troubleshooting SiUS04-904
Service Diagnosis 109
4.8 Compressor Lock
4.8.1 09/12 Class
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 overcurrent.
The system judges the compressor lock, and cannot operation with position detection within 15
seconds after start up.
The system is 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
Turn off the power. Disconnect the
harnesses U, V and W.
(R8065)
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
NO
YES
YES
NO
NO
YES
Check with the inverter checker (*).
Turn off the power and reconnect
the harnesses. Turn on the power
again and get the system restarted.
(Precaution before turning on the power again)
Make sure the power has been off for at least 30 seconds.
Correct the power supply or
replace the outdoor unit
PCB.
* Inverter checker
Part No.: 1225477
Replace the compressor.
Replace it as required.
Replace the compressor.
Check the electronic
expansion valve.
Normal?
Emergency stop
without compressor running?
System shut
down after errors repeated
several times?
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