Compressor Lock - Daikin 3MKS50E3V1B Service Manual

Troubleshooting for Outdoor Unit
7.8

Compressor Lock

E6
Remote
Controller
Display
Outdoor Unit LED
A
Display
Method of A compressor lock is detected by checking the compressor running condition through the
Malfunction position detection circuit.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.15
Refer to P.331
306
j h i i h
1 2 3 4
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
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.15
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
h
5
∗ Inverter checker
Part No.: 1225477
NO
YES
NO
SiBE121135
Correct the power supply or
replace the outdoor unit
PCB.
Replace the compressor.
Check the outdoor electronic
expansion valve coil.
Replace it as required.
Replace the compressor.
(R14439)
Service Diagnosis