J&E Hall JEHSD-0400-B3-M-3, Техническое руководство

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Issue: 01.08.2020 Page 34
Service & Maintenance
The condensing units are designed to give long life operation with minimum maintenance. However, they should be routinely
checked and the following service schedule is recommended under normal circumstances:
The removal of the top, side and front panels ensures that all parts are accessible.
1. Compressor – Inspect at regular intervals
••••
Check for refrigerant leaks on all joints and fittings.
••••
Check mountings for tightness and wear.
••••
Check operation of crankcase heater.
••••
Check electrical connections.
••••
Ensure that no abnormal noise or vibration is detected during test run.
••••
Check the compressor oil levels and top up if required. The oil level should be ½ to ¾ way up the sight glass (where fitted).
2. Condenser Fan Motor & Blade – Clean and inspect at regular intervals
••••
Check for abnormal noise, vibration and fan imbalance.
••••
Ensure that the fan motor is clean and spins freely.
••••
Check that the condenser fan blade is clean and free from restriction and damage/imbalance.
••••
Note:
The fan motor is pre-lubricated and factory sealed so no maintenance is necessary.
3. Condenser Coil – Clean and inspect at regular intervals.
••••
Check and remove the dirt and debris between the fins using a soft brush, low pressure compressed air/inert gas or a
low pressure sprayer utilizing clean water. A suitable chemical coil cleaner may be used as required. Accumulations of
dirt on the condenser face can be removed with a soft bristle hand brush. When using liquids, ensure electrical items are
isolated and correctly protected.
••••
DO NOT USE HIGH PRESSURE JET WASHERS.
••••
Check and remove any obstacles which may hinder the airflow through the condenser coil.
4. Controls
•
Check settings and operation of pressure switches.
•
Check overload setting.
•
Check fan speed control setting and operation
.
5. Power Supply – Inspect at regular intervals.
••••
Check the running current and voltage for the condensing unit.
••••
Check the electrical wiring and tighten the wires onto the terminal blocks if necessary.
6. Refrigerant Charge
•
Check the refrigerant charge by ensuring that the system is operating correctly, the pressures are as expected and that the liquid line
sight glass shows a full bore of liquid refrigerant.
•
Carry out a full leak test.
Important Note:
Warning! – Disconnect the mains electrical supply before servicing or opening the unit.