Compressor Lock - Daikin FTX20K(2)V1B Service Manual

Troubleshooting

4.11 Compressor Lock

E6
Error Code
A compressor lock is detected by the current waveform generated when applying high-
Method of Error
frequency voltage to the motor.
Detection
 If the error repeats, the system is shut down.
Error Decision
 Reset condition: Continuous run for about 11 minutes without any other error
Conditions
 Closed stop valve
Supposed
 Compressor locked
Causes
 Disconnection of compressor harness
Troubleshooting
Check No.12
Refer to P.81
Check No.15
Refer to P.83
63
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
(Precaution before turning on the power again)
Make sure the power has been off for at least 30 seconds.
Stop valve closed?
NO
Turn off the power. Disconnect the
harnesses U, V, and W.
Check No.15
Check with the inverter analyzer.
Any LED off?
YES
Turn off the power and reconnect
the harnesses. Turn on the power
again and restart the system.
Emergency
stop without compressor
running?
NO
System shut
down after errors repeated
several times?
YES
YES
∗ Inverter analyzer:
RSUK0917C
NO
YES
NO
SiBE041525F
Open the stop valve.
Correct the power supply or
replace the outdoor unit
PCB (main PCB).
Replace the compressor.
Check the electronic
expansion valve coil.
Go to Check No. 12.
Replace the compressor.
(R21067)
Service Diagnosis