Troubleshooting
SiENBE04-808_A
115
Service Diagnosis
4.10 Compressor Lock
Remote Control
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
20/25/35/42 class
Operation stops due to overcurrent.
If the error repeats 16 times, the system is shut down.
Reset condition: Continuous run for about 11 minutes without any other error
50 class
A compressor lock is detected by the current waveform generated when applying high-
frequency voltage to the motor.
If the error repeats 16 times, the system is shut down
Reset condition: Continuous run for about 5 minutes without any other error
Supposed
Causes
Compressor locked
Compressor harness disconnected
Troubleshooting
Turn off the power. Disconnect the
harnesses U, V, and W.
(R8399)
Caution
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 restart the system.
(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 PM1.
(Replace the outdoor unit
PCB.)
∗
Inverter checker
Part No.: 1225477
Replace the compressor.
Replace the compressor.
Normal?
Emergency stop
without compressor running?
System shut
down after errors repeated
several times?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the electronic
expansion valve.
Replace it as required.
SiENBE04-808_A.pdf 127
21/02/2011 13:20:02
