Owners Manual Quantum Energy Technologies
5d: Thermal Overload
The compressor contactor has an integral Thermal Overload. The thermal overload is factory
preset to protect the compressor from excessive current draw. Should for any reason the
compressor draw excessive current, the thermal overload will “trip” and remove the supply from
the compressor. “Pushing” the reset button manually resets the thermal overload.
Figure 10: Contactor Reset Button
Reset Button
Should the compressor continue to “trip” the thermal overload, turn off the machine, de-energise
and isolate the power supply at the POINT OF SUPPLY. Please contact Quantum or its duly
appointed and authorised representative, who will arrange for a service technician to check and/or
repair the machine.
5e: Equipment Protection Alarms (not available for all models)
The following conditions will shut down the unit and activate the alarm circuit:
No condenser water flow Low evaporator pressure
Phase voltage protection (Optional) High evaporator pressure
Motor protection system Sensor failures
5f: De-icing
From time to time during the units operation the fan may stop, this is not a fault. The unit actually
entered a de-icing mode, which will de-ice the evaporators for optimal operation.
The de-ice mode is dependent on numerous parameters for its activation such as evaporator
temperature and the time interval, and hence is automatically activate as required.
Document Number : QDC0049PD-5 Page 24 of 33
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