What Is an OLP?
An OLP is installed in inside or outside of a compressor to ensure stable temperate control whilst operating. In case of overheating or irregular fluctuation of the voltage, the OLP will turn off the power to ensure safe usage.
The OLP is short-circuited due to bimetal effected by high temperature. There are two causes for short-circuit issues : the direct cause due to the heat on the Bimetal plates, and the indirect cause due to the electric current.
Condenser Block Test : Check the OLP performance at high temperature
Voltage Fluctuate Test : Check the performance with over current in low/high voltage
It is necessary to determine the suitability of the OLP in all AC Sets according to the OLP curve spec.
In case of operation in non-operating condition, frequent OLP operation could potentially cause problems with the cooling/heating operation rate and reduce the efficiency.
If the OLP does not operate in the operating condition, it may be due to a damage in the motor winding caused by high temperatures, resulting in the damage of the Compressor.
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