Compressor Lock - Daikin Super Multi NX C-Series Service Manual

Troubleshooting

5.12 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
" The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds
Malfunction
Decision
" 40 seconds after the compressor has started, the position detection circuit detects a
Conditions
" The system will be shut down if the error occurs 16 times.
" Clearing condition: Continuous run for about 5 minutes (normal)
" Compressor locked
Supposed
Causes
Troubleshooting
182
5 1 1 2 4 3 4 4
or a frequency of above 160 Hz.
compressor frequency of above 180 Hz.
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
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 get the system restarted.
Emergency stop
without compressor
running?
NO
System shut
down after errors repeated
several times?
YES
1
NO
YES
NO
SiE12-411
∗ Inverter checker
Part No.: 1225477
Correct the power supply or
replace the SPM.
(Replace the outdoor unit
PCB.)
Replace the compressor.
Check the electronic
expansion valve.
Replace it as required.
Replace the compressor.
(R2842)
Service Diagnosis