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Starting device with HST
Connect a voltmeter between terminals 10 and 13 on the start-
ing device. If no voltage can be measured, either the mains
cable or the socket is defective.
Connect a voltmeter between terminals 10 and 14 on the start-
ing device, It no voltage can be measured, a defective ther-
mostat or thermostat wiring is indicated.
Dismount the red and brown wires on the thermostat and short-
circuit them. If the compressor runs now, the thermostat is
detective, It the compressor does not run, a break in the ther-
mostat wiring is indicated.
If there is voltage between terminals 10 and 14 on the starting
device, a defect in the starting device, starting condenser,
compressor or refrigerating system is indicated.
1.Starting condenser
2. Run winding
3. Start winding
4. Winding protector
1.5. Trouble-Shooting for Electrical Faults in the
Compressor
Separate the starting device from the compressor and use an
ohmmeter to test the main and start winding of the com-
pressor.
Connect the ohmmeter between “Run” and “joint” to deter-
mine the resistance of the main winding. And between “Start’
and “Joint” to determine the resistance of the start winding.
NB: Measurements must be made when the compressor is
cold.
If the measurements indicate a damaged winding, replace-
ment of the compressor is necessary.
If the measurements indicate that the windings are not defec-
tive, a new starting device should be installed. If the compres-
sor still does not start, check the refrigerating system and
compressor for possible blockage.
Compressor Connecting
Pins Location
Danfoss Compressors
Za nussi Compressors
Unidad Hermética Compressors
11.