Heatcraft Refrigeration Products H-IM-72A 用户手册

(Service/Maintenance should be performed only by a
qualified / certified refrigeration  service technician.)

• Check refrigerant charge using the liquid line sight glass.

• Check compressor oil level.

• Check compressor crankcase heater operation.

• Check main power and control voltage

• Check  appearance of area around the unit.

• Check system pressures

• Check the refrigerant system for leaks.

• Check suction filters and liquid line filter driers.

• Check all flanged connection bolts, fittings and line

clamps for tightness.

• Inspect condenser fan blades and motor mounts for

cracks, loose set screws or mounting bolts.

• Tighten all electrical connections.

• Check operation and condition of contacts on

compressor / fan motor contactors. Check appearance of
control panel interior.

• Check appearance of exterior conduit / junction boxes.

• Check appearance of insulation.

• Check operation of auxiliary equipment.

With unit in stable operation, record all operating conditions:

• Suction / discharge / liquid refrigerant pressure(s) and

temperature(s)

• System superheat, liquid subcooling, ambient

temperature

• Compressor amperage

• Test all operating and safety controls.

• Obtain oil sample for analysis.  Change oil if required.

• Clean condenser coil.

• Straighten condenser fins as required.

• Change liquid line filter drier and suction filter cores.