How to verify the overload protector:
1. Disconnect the refrigerator’s feed electric cable.
2. Remove the relay cap, and take away the compressor relay. Disconnect one protector wire and remove it from the
compressor.
3. With an ohmmeter, measure resistance between the pawl terminal and the female plug terminal. At normal room
temperature, the overload protector resistance must be lower than 1 ohm. An open protector will have an infinity
resistance.
Run capacitor - See figure B4.
The run capacitor has permanently installed wires, connected with the relay’s terminals 2 and 3. The capacitor doesn’t
have an identified terminal; it can be connected regardless of the polarity.
Figure B4 - Electric components
How to check the run capacitor:
1. Disconnect the refrigerator’s feed electric cable.
2. Remove the relay cap and disconnect the relay capacitor cables.
3. Discharge the capacitor by short – circuiting the terminals with a 500 K resistor (1 watt) for one minute.
4. With an ohmmeter, verify the resistance through the capacitor wire terminals with the gauge in the scale “Ohms x
1000”.
a) The pointer needle should jump to zero ohms and return to infinity quickly.
b) If the pointer needle doesn’t move, then the capacitor is open.
c) If the pointer needle reads a constant value close or to zero ohms, then the capacitor is short - circuited.
d) If the pointer needles jumps to zero and returns to constant high resistance (not infinity), then the capacitor has a
high resistance leakage.
Compressor start circuit - See figure B5
When the compressor circuit is energized at the beginning, the solid state relay has low resistance (3-12 ohms), and the
start and run windings are excited to run the compressor. The run capacitor is shunted by the PTC relay, and has no
major functions during the compressor start.
PAGE. B4
1
3
6
5
2
Compressor
terminals
Overload
protector
Solid state
relay
S
C
R
Содержание 20060328
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