Compressor Lock - Daikin FTX-N Series Service Manual

Troubleshooting

4.12 Compressor Lock

E6
Error Code
Method of Error
A compressor lock is detected by the current waveform generated when applying high-frequency
Detection
voltage to the motor.
Error Decision
 If the error repeats, the system is shut down.
Conditions  Reset condition: Continuous run for about 11 minutes without any other error
Supposed
 Closed stop valve
Causes
 Compressor locked
 Disconnection of compressor harness
Troubleshooting
Check No.12
Refer to P.96
Check No.15
Refer to P.98
75
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
SiUS041638EA
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