Trouble Shooting - Daikin JEHBCU-0150-M-1 Technical Manual

4. Controls
•
Check settings and operation of pressure switches.
•
Check overload setting.
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.
7. Unit decommissioning and disposal
•
At the end of the unit's useful life, a suitably qualified engineer should decommission it. The
refrigerant and compressor oil are classed as hazardous waste and as such must be reclaimed
and disposed of in the correct manner, including completion of waste transfer paperwork. The
unit components must be disposed of or recycled as appropriate in the correct manner.

12. Trouble Shooting

The following is some guidelines to troubleshoot some common failure of condensing unit. Consult to qualified
specialists before taking any corrective action.
Failure
Fan does not work
Compressor does not start
Insufficient cooling
Warning! – Immediately shut off power of the unit if there is any event of accident or
breakdown.
T-CU01-NOV17-1
•
Improper wiring
•
Fan motor faulty
•
Improper wiring
•
Defective contactor or coil
•
System stopped because of tripped of safety
device.
•
Defective start/run capacitor
•
Compressor faulty
•
Low refrigerant charge
•
Condenser coil dirty
•
Obstacle blocking air inlet/outlet
•
Improper thermostat setting
Important Note
.
Possible Causes
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