Checklist; Service And Maintenance - Daikin JEHBCU-0150-M-1 Technical Manual

10. Checklist

•
Check all electrical termination and circuits.
•
Check the service valves are fully open.
•
Check compressor oil level.
•
Check the pressure switch for right settings.
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Ensure fan motor and fan blades are installed properly.
•
Observed the system pressures during the charging and initial operation process.
•
Continue to charge the system until sight glass is clear. Make sure that high pressure is > 13.2 bars for
R404A and > 7.9 bars for R134a when judge the refrigerant charging amount.
•
Check the compressor's discharge and suction pressure, ensure it is working within the operating range.
•
Check condenser fan, ensure warm air blowing off.
•
Check evaporator blower, ensure discharge air is cool.
•
Check suction superheat and adjust expansion valve to prevent liquid flood back to the compressor.

11. Service and Maintenance

Warning! – Disconnect the main electrical supply before servicing or opening the
unit
Warning! – Ensure there is no refrigerant in refrigerant circuit before dismantle it
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 visible at least
½ 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 suitable chemical coil cleaner.
•
Check and remove any obstacles which may hinder the airflow through the condenser coil.
T-CU01-NOV17-1
Important Note
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