Mitsubishi Ceiling-Concealed Indoor Unit SEZ-KD35VA

Gas cylinder connected to the service port of stop valve (3-way)

Air purge of the pipe (or hose) coming from refrigerant gas cylinder executed

Amount of refrigerant replenished

Note: In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.

Caution: Do not discharge the refrigerant into the atmosphere. Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit.

For additional charging, charge the refrigerant from liquid phase of the gas cylinder.

If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked.Thus, charge the refrigerant slowly.

Check that the unit is free from leaks of refrigerant, loosened connections, and incorrect polarity.

Measure an impedance between the power supply terminal block (L, N, ) on the units and the ground with a 500 V Megger

Measure an impedance between the power supply terminal block on the outdoor unit and the ground with a 500 V Megger

Press the snowflake icon button for more than 3 seconds to start the cooling operation.