Single Zone Service Manual - General

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Part 3 Test Run

Check to see whether there is any refrigerant leakage, and check whether the power or transmission

cable is connected properly.

NOTE: Check that there should be no disconnection when all pins and wires are pulled by hands.

Check whether the liquid pipe and gas pipe valves are fully opened.

NOTE: Be sure to tighten caps.

Confirm that 500 V megger shows 2.0 MΩ or more between power supply terminal block and

ground. Do not operate in the case of 2.0 MΩ 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 MΩ as a result of refrigerant accumulation in the internal

compressor.

If the insulation resistance is less than 2.0 MΩ, turn on the main power supply.

1. Check before Test Run