Viking VUAR140 Troubleshooting Guide download pdf (Page 77)

Symptom Possible Causes Corrective Action

Air in system Check for low side leak. Repair, evacuate and recharge

system.

Unit runs Ice on evaporator See “Ice on evaporator.”

continuously.

Temperature

normal

Noisy operation Loose flooring or floor not firm Repair floor or brace floor.

Cabinet not level Level cabinet.

Tubing in contact with cabinet, Adjust tubing.

other tubing or other metal

Drip tray vibrating Adjust drain pan.

Fan hitting another part Ensure fan properly aligned and all attaching hardware and

brackets are tight and not worn. Tighten or replace.

Worn fan motor bearings Check motor for loss of lubricant or worn bearings.

Replace if necessary.

Compressor mounting grommets Tighten hardware. Replace grommets if necessary.

worn or missing; mounting

hardware loose or missing.

Free or loose parts causing or Inspect unit for parts that may have worked free or loose

allowing noise during operation or missing screws. Repair as required.

Frost or ice on Evaporator fan faulty Check fan motor. Replace if defective.

Evaporator Defrost heater remains open Check defrost heater continuity. Replace if faulty.

Defrost thermostat faulty Check defrost thermostat and replace if faulty.

Open wire to connector Check wiring and connections. Repair as necessary.

Refrigerant shortage or restriction Check for leak or restriction. Repair, evacuate and

recharge system.

Unit starts and Loose wire or thermostat Check wiring and connections. Repair as necessary.

stops frequently connections

(cycles on & off) High ambient temperature Consumer education.

Supply voltage out of Check input voltage. Correct and supply problems.

specifications.

Overload protector open Check overload protector for continuity. If open, replace

overload. NOTE: Ensure overload / compressor are below

trip temperature before testing.

Faulty compressor motor Check capacitor for open / short. Replace if necessary.

capacitor NOTE: Discharge capacitor before testing.

Faulty compressor Test and replace compressor if faulty.

Faulty fan motor Check fan motor. Replace if necessary.

Restricted air flow Check condenser and grille for dirt. Clean.

Refrigerant shortage or restriction Check for leak or restriction. Repair, evacuate and

recharge system.

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Viking VUAR140 Troubleshooting Guide Page 77