SiBE121021_C Troubleshooting for Outdoor Unit
Service Diagnosis 337
7.4 Compressor Lock
Remote
Controller
Display
E6
Outdoor Unit LED
Display
A
j
1
h
2
i
3
i
4
h
5
h
Method of
Malfunction
Detection
A compressor lock is detected by checking the compressor running condition through the
position detection circuit.
Malfunction
Decision
Conditions
îš„
Judging from the current waveform generated when high-frequency voltage is applied to the
compressor.
îš„
If the error repeats 16 times, the system is shut down.
îš„
Reset condition: Continuous run for about 5 minutes without any other error
Supposed
Causes
îš„
Compressor locked
Troubleshooting
Check No.15
Refer to P.366
(R14409)
Caution
NO
YES
YES
NO
NO
YES
(Precaution before turning on the power again)
Make sure the power has been off for at least 30 seconds.
Turn off the power. Disconnect the
harnesses U, V, and W.
Check No. 15
Check with the inverter checker (∗).
Turn off the power and reconnect
the harnesses. Turn on the power
again and restart the system.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
∗ Inverter checker
Part No.: 1225477
Replace the compressor.
Replace the compressor.
Check the electronic
expansion valve.
Replace it as required.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Normal?
Emergency stop
without compressor
running?
System shut down
after errors repeated
several times?
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