Troubleshooting
SiBE041012_B
88
Service Diagnosis
4.14 Compressor Lock
Error Code
E6
Method of Error
Detection
A compressor lock is detected by checking the compressor running condition through the
position detection circuit.
Error Decision
Conditions
25/35 class
Operation stops due to overcurrent.
If the error repeats, 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, 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
Check No.15
Refer to P.114
Turn off the power. Disconnect the
harnesses U, V, and W.
(R18317)
Caution
NO
YES
YES
NO
NO
YES
Check No.15
Check with the inverter analyzer.
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 outdoor unit
PCB.
∗
Inverter analyzer:
RSUK0917C
Replace the compressor.
Replace the compressor.
Check the outdoor electronic
expansion valve coil.
Replace it as required.
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.
