Compressor Lock - Daikin J Series Service Manual

Troubleshooting

4.10 Compressor Lock

E6
Remote
Controller
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>
Decision
Conditions
<50 class>
Supposed
Causes
Troubleshooting
Check No.14
Refer to P.129
93
Operation stops due to overcurrent.
If the error repeats 16 times, the system is shut down.
Reset condition: Continuous run for about 11 minutes without any other error
A compressor lock is detected by the current waveform generated when applying high-
frequency voltage to the motor.
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
Compressor harness disconnected
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 No.14
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
SiBE041101
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.
(R14170)
Service Diagnosis