© 2011 Viking Preferred Service
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Diagnostics
Defrost Operation
The Control Board adapts the compressor run time between defrosts to achieve optimum defrost intervals
by monitoring the length of time the defrost heater is on. After initial power up, defrost interval is 4 hours
compressor run time. Defrost occurs immediately after the 4 hours of compressor run time.
Entering Forced Defrost Mode
Enter the Forced Defrost Mode by performing the following:
1. Press and hold the “DOOR ALARM” keypad.
2. Then press and hold refrigerator temperature “DOWN” keypad. Both buttons are now being held in.
3. While still holding the refrigerator temperature “DOWN” keypad, release the door alarm keypad and wait
three seconds.
4. When entered successfully, Fd will be displayed in freezer display.
Press and Hold
Hold Press and Hold
HoldRelease
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