MXS Service Manual

SiUS121736EA Troubleshooting for Outdoor Unit
Service Diagnosis 190
7.8 Compressor Lock
Error Code E6
Outdoor Unit LED
Display
A j 1 h 2 i 3 i 4 h 5 h
Method of Error
Detection
A compressor lock is detected by checking the compressor running condition through the position
detection circuit.
Error Decision
Conditions
 Judging from the current waveform generated when high-frequency voltage is applied to the
compressor.
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 5 minutes without any other error
Supposed
Causes
 Closed stop valve
 Defective outdoor unit PCB
 Defective compressor
 Defective electronic expansion valve
Troubleshooting
Check No.12
Refer to P.212
Check No.15
Refer to P.214
Turn off the power. Disconnect the
harnesses U, V, and W.
(R21067)
Caution
NO
YES
YES
NO
NO
YES
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 (main PCB).
Open the stop valve.
∗ Inverter analyzer:
RSUK0917C
Replace the compressor.
Replace the compressor.
Check the electronic
expansion valve coil.
Go to Check No. 12.
Any LED off?
Stop valve closed?
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.