Viking VCBB536 - Diagnostics; Mode A Thermistor Readings & Defrost

© 2009 Viking Preferred Service
18
Diagnostics
Mode A Functions (continued)
Freezer Thermistor Temperature
When Service Mode A is entered, press the “FRZ TEMP” pad. Using the Code on page 17, add up the value
of the illuminated bars to get the current Freezer temp. The example below shows a Freezer Temp of 2>
Refrigerator Thermistor Temperature
When Service Mode A is entered, press the “REF TEMP” pad. Using the Code on page 17, add up the value
of the illuminated bars to get the current Fresh Food temp. The example below shows a Fresh Food temp of
36 degrees F.
Optional Conventional Defrost
The unit comes set from the factory for Adaptive Defrost. In the event that more or less defrost intervals are
required, the unit can be set for a conventional defrost cycle. In this mode the defrost program can be set to
predetermined defrost times. Note: The defrost intervals are set in SERVICE MODE A. In order to activate the
conventional defrost system, it must be initiated in SERVICE MODE B. See Defrost Mode Selection –Service
Mode B on Page 26
To change the defrost time, place the unit in Program Mode A (See Program modes on page 16). When you have
entered SERVICE MODE A, Press and hold the “DISPLAY OFF” pad for 3 seconds. 1 audio confirmation beep will
be heard. Both the FRZ temp and REF temp LED will extinguish. The Orange LED to the right of the High Temp
LED and (1) bar will be lit. The default conventional defrost setting is the 4th bar (8 hours) shown below.
The Conventional Defrost time will be displayed by use of one of the temperature indicators. The times can
be set to 4, 5, 6, 8, 12, 16, 18, 20, and 24 hours of Compressor Run Time (CRT)
The intervals are changed by using the HIGHER and LOWER Temp key pads. Each press of the “HIGHER”
pad will decrease the defrost time by one level while each press of the “LOWER” pad once will increase the
defrost time by one level in the other direction. Once Conventional defrost is initiated in SERVICE MODE B,
the first defrost will always be 4 hours of CRT regardless of the level it has been changed to.
The indicator light and corresponding Defrost Times are listed below.
Indicator
123
4*
56789
Defrost Time
4 hours 5 hours 6 hours
8 hours
12 hours 16 hours 18hours 20 hours 24 hours
*Default setting
To exit Adjustable Conventional Defrost, press the “ACTIVATE CONTROLS” key.