Compressor Lock - Daikin FTXS20G2V1B Service Manual

Troubleshooting

4.10 Compressor Lock

E6
Remote Control
Display
Method of A compressor lock is detected by checking the compressor running condition through the
Malfunction position detection circuit.
Detection
Malfunction
20/25/35/42 class
„ Operation stops due to overcurrent.
Decision
„ If the error repeats 16 times, the system is shut down.
Conditions
„ 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-
„ If the error repeats 16 times, the system is shut down
„ Reset condition: Continuous run for about 5 minutes without any other error
„ Compressor locked
Supposed
„ Compressor harness disconnected
Causes
Troubleshooting
115
frequency voltage to the motor.
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.
Turn off the power. Disconnect the
harnesses U, V, and W.
Check with the inverter checker (∗).
Normal?
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
∗ Inverter checker
Part No.: 1225477
NO
YES
NO
SiENBE04-808_A
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
Replace the compressor.
Check the electronic
expansion valve.
Replace it as required.
Replace the compressor.
(R8399)
Service Diagnosis