Compressor Olp (Overload Protector) - LG LMX21981 Series Training Manual

LMX21981xx REFRIGERATOR
The PTC must be allowed to cool before the system can be restarted. Within the sealed
system, it takes approximately 5 minutes for the pressure to equalize so the compressor
can restart. When the PTC cools sufficiently, the compressor can start again. If the
compressor attempts to restart before the PTC has cooled, the PTC will allow current to
flow to only the main winding and the OLP will open because of the over current
condition. This process will repeat itself 3 to 5 times while the compressor tries to
restart until the PTC cools sufficiently.
It is critical to use the correct parts when replacing the OLP and PTC or the compressor
will be damaged. Parts may appear physically identical but could have different electrical
ratings.
Order replacement parts by model number and serial number.
OVERLOAD PROTECTOR (OLP)
The OLP (Over Load Protector) is attached to the outside of the compressor and
protects it by opening the circuit if the temperature exceeds the operating limit. When
high current flows to the compressor, the heater inside the OLP causes the bimetal
spring to expand, interrupting the current to the compressor.
Do not adjust the OLP in any manner.
LMX21981xx Page 55 TRAINING MANUAL