Compressor Lock - Daikin K-Series Service Manual

SiBE061121.book Page 90 Monday, April 25, 2011 3:21 PM
Troubleshooting

4.11 Compressor Lock

E6
Remote
Controller
Display
Method of A compressor lock is detected by checking the compressor running condition through the
position detection circuit.
Malfunction
Detection
Malfunction <25/35 class>
Decision
Conditions
<50 class>
Supposed
Causes
Troubleshooting
Check No.15
Refer to P.123
90
Operation stops due to overcurrent.
If the error repeats, 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, 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 (∗).
NO
Normal?
YES
Turn off the power and reconnect
the harnesses. Turn on the power
again and restart the system.
Emergency
YES
stop without compressor
running?
NO
System shut
NO
down after errors repeated
several times?
YES
∗ Inverter checker
Part No.: 1225477
SiBE061121
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
Replace the compressor.
Check the outdoor electronic
expansion valve coil.
Replace it as required.
Replace the compressor.
(R14623)
Service Diagnosis