LG Multi-Inverter Type, Service Manual

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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3. Test Run
Check to see whether there is any refrigerant leakage, and check whether the power or transmission
cable is connected properly.
Check liquid pipe and gas pipe valves are fully opened.
NOTE : Be sure to tighten caps.
Confirm that 500 V megger shows 2.0 M
Ω
or more between power supply terminal block and
ground. Do not operate in the case of 2.0 M
Ω
or less.
NOTE : Never carry out mega ohm check over terminal control board.
Otherwise the control board may break.
Immediately after mounting the unit or after leaving it turned off for an extended length of
time, the resistance of the insulation between the power supply terminal board and the
ground maydecrease to approx. 2.0 M
Ω
as a result of refrigerant accumulation in the internal
compressor.
If the insulation resistance is less than 2.0 M
Ω
, turn on the main power supply.
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1. Check before Test Run