Remedy
Reduce the thermal load; check the variation in voltage of the power supply.
c. Abnormal thermal protection
Analysis
The compressor current is within its normal range, but the thermal protector actuates
repeatedly.
Remedy
Replace the thermal protector with a new one.
3. Sudden seizure by other factors
Normal seizure
The Start and stop functions of the compressor is generally controlled by a thermostat.
When the temperature in the refrigerator reaches its desired value, the thermostat will
shut down the compressor automatically. Do not take this normal operation for a problem
D. Compressor does not start.
When compressor will not start, troubleshoot step-by-step for problems considering
electrical and mechanical connections.
1.
Inspect the power supply to see whether it is connected to the compressor circuit.
Analysis
In case the compressor cannot start, generally it will show in the power supply circuit
activities, for example, it may show; power failure; poor contact of switch and a blown
fuse. Make a comprehensive analysis of these situations; find out the real cause and
correct problem
Remedy
a.
Check the input power circuits for proper voltage power supply i.e. the circuit that is
connected to the knife switch. This can be determined with a voltmeter or a test pencil. If
a blown fuse is found, ascertain and remove its cause, then replace it with a new one of
the same specifications.
b
. Check the compressor accessories, including its thermal protector and relay. In case
the thermal protector is damaged, the compressor cannot be powered on. If the relay is
out of order, the motor will not run and hum sound can be heard from it after the
compressor is turned on. In that case, shut it down immediately, otherwise, the motor
windings will be burned out in case this condition lasts longer.
c.
Check the relay contacts and plugs for perfect work reliably. Poor contact may cause
the motor not running or humming.
2. Check circuit for normal voltage level
Analysis
If the circuit voltage is obviously lower than its rated value, it will be difficult to start the
motor and a hum sound can be heard from it.
Summary of Contents for RF-8888-174
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