Viking VUAR140 Troubleshooting Guide download pdf (Page 72)

Component Description Test Procedures

Refrigerant gas is pulled through 1. Separate evaporate from rest of refrigeration system and

suction line by compressor to pressurize evaporator up to a maximum of 235 PSI with

complete the refrigerant cycle. a refrigerant and dry nitrogen combination.

2. Recheck for leaks.

Heater, Applied to back of ice and water Check resistance across heater.

cavity cavity to help prevent conden-

sation from forming on face of If heater is faulty, use spare heater foamed in place at factory.

cavity. Wired in series with hot

side of line through auger motor

interlock switch.

Heater, See “Electronic Function Check resistance across heater.

evaporator Description, Adaptive Defrost

(defrost) Circuitry. To check defrost system:

1. Thermocouple defrost thermostat and plug refrigerator into

wattmeter.

2. Force into defrost mode (see section on electronic testing)

Wattmeter should read specified watts (according to Technical

Data Sheet) ±5 F; thermostat should interrupt power to heater

Heater, For service use only to reduce

mullion condensation on center mullion.

Heater foamed in place. Not To connect mullion heater to power:

powered from the factory. 1. Disconnect power to unit using power switch.

2. Remove ice grille.

3. Remove bracket holding condensate evaporation fan and

water valve.

4. Locate water valve wiring harness.

5. Carefully slit wiring harness vinyl sleeve to expose on black

and one white lead with bullet terminals inside harness sleeve.

6. Connect to heater leads at left side of cabinet.

7. Wrap vinyl sleeve with electrical tape to close slit.

Ice Maker See “Ice Maker” section for

service information.

Motor, Condenser fan moves cooling Check resistance across motor windings.

condenser air across condenser coil and

Motor, Evaporator motor moves air 1. Disconnect power to unit.

Evaporator across evaporator coil. 2. Disconnect fan motor leads.

fan 3. Check resistance from ground connection solder. Trace to

motor frame must not exceed .05 ohms.

4. Check for voltage at connection to motor.

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Viking VUAR140 Troubleshooting Guide Page 72