Viking VUAR140 Troubleshooting Guide download pdf (Page 9)

PROBLEM POSSIBLE CAUSE TEST PROCEDURES-

ACTION

Compressor runs, but no Permanent restriction First check for moisture restriction.

refrigeration or insuf- Check for crimped or damaged tubing.

ficient refrigeration Repair or replace restricted component.

Low charge or no charge Check for leak. Add leak charge to

get internal pressure. Repair leak or

replace leaking component.

No capacity or low capacity Check operating wattage and pressure.

compressor. See performance chart for wattage and

high and low side pressures. Do not

judge compressor to have low capacity

until restrictions and low charge have

been ruled out.

Air circulation on high side:

a. Condenser or grille Clean condenser and air passage with

restricted by lint vacuum cleaner.

b. condenser fan motor Disconnect fan motor leads and check

running or running separately. Replace motor if defective.

slowly.

c. Condenser fan motor Put condenser fan motor top cover in

top cover not in place. place.

Compressor kicks out on High ambient and / or ab- On initial pull-down in high ambient,

overload normal usage. the compressor may cut off on overload.

Instruct customer.

Low or high voltage Check voltage with voltmeter. Voltage

at outlet should be 110 to 120 volts AC

at the moment of start. Low voltage

may cause false start s. High voltage

may cause compressor to overheat.

Correct voltage condition.

Run capacitor Check capacitor. Replace if defective.

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Viking VUAR140 Troubleshooting Guide Page 9