LG ACHH Series Manual page 43

n Inverter compressor
M chiller is composed of 2 inverter scroll compressors.
If occurring an error regarding a compressor and power while operating, please check and confirm following an order below.
Items to be confirmed
How long has the power supplied before
an operation?
Does failure appears again when starting
operation?
Method to measure insulation resistance
Pipe
Comp.
Figure 1.
Method to measure coil resistance
Tester
Comp.
Figure 2.
Symptom
1) When supplying for 12
hours or more than that
2) When supplying for less
than 12 hours
1) The compressor stops and
same error appears again.
2) If output voltage of the
inverter is stably output. *1
Tester
3) If output voltage of the
inverter is unstable or it is
0V. (When incapable of
using a digital tester)
The phenomena from main component failure
• Please go to number 2.
• Please permit the power for a designated time
(12 hours) and then go to number 2.
• Please confirm whether or not IPM is failed.
* Check coil resistor and insulation resistor. If
normal, restart the unit. If same symptom
occurs, replace the compressor.
* Insulation resistor: 50 MΩ or more
* Coil resistor (below table)
JQC068MA*
Temp.
U-V
V-W
W-U
* Check the IPM.
If the IPM is normal, replace the inverter board.
* Check coil resistor and insulation resistor.
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Treatment
25 ℃ 75 ℃
0.216±7% Ω 0.258±7% Ω
0.216±7% Ω 0.258±7% Ω
0.216±7% Ω 0.258±7% Ω