ELECTRONIC TESTING –VCBB BOTTOM
FREEZER – REFRIGERATOR
Electronic Testing Mode
Forced Defrost Start
1. Press Display On pad to activate control
panel.
2. Simultaneously press and hold Max Ref
and Display Off pads for 3 seconds.
Forced Compressor Start
1. Press Display On pad to activate control
panel.
2. Simultaneously press and hold Max Frz
and Display Off pad for 3 seconds.
Open Thermistor Detect
Alarm sounds and freezer or refrigerator
indicator light shows and temperature indicator 4
through 7 will turn on in sequence if either
thermistor circuit opens. Refer to Temperature
Control Operation section and Electronic Testing
section.
1. Press Alarm Off pad to turn off alarm.
2. Alarm will reset for normal operation.
If conditions has not been corrected,
alarm will sound again.
Evaporator Fan Suppression
The evaporator fan will turn off every time either
refrigerator or freezer door is open.
To test if this function is operating:
1. Perform forced pull down procedure as
noted above—evaporator fan should be
on.
2. Open the refrigerator or freezer door—
the fan should turn off.
3. Push the light switch off – the
evaporator fan should start.
If fan does not toggle off and on when
refrigerator light switch is turned off and on it
has been determined evaporator fan motor
operational, perform following tests to determine
failure.
1. Check for line voltage on terminal E7
on high voltage board. With
refrigerator door open (refrigerator light
ON) reading should be 120 VAC. With
refrigerator door closed (refrigerator
light OFF) reading should be
approximately 0 VAC. If voltage does
not change with light switch and light is
turning light off and on, red/white wire
is broken between switch and high
voltage board.
2. Check for voltage on terminal E7 on
high voltage board. Output voltage
should toggle with toggling of light
switch. If output voltage does not
toggle, high voltage board needs
replacing.
3. If terminal 7 on high voltage board
changes with opening and closing of
door, orange wire in low voltage
harness is broken (check for continuity
between pin 7 on high voltage board
and pin 10 on low voltage board) or low
voltage board needs replacing.
1. Check for line voltage on terminal E8
on high voltage board. With freezer
door open, reading should be 120 VAC.
With door closed, reading should be
approximately 0 VAC. If voltage does
not change with light switch and light
switch is turning light off and on,
violet/white wire is broken between
switch and high voltage board.
2. Check for voltage on pin 7 on pin
connector on high voltage board.
Output voltage should toggle with
toggling of light switch. If it does not
toggle, high voltage board needs
replacing .
3. If voltage on pin 7 on pin connection on
high voltage board changes with
opening and closing of door, orange
wire in low voltage harness is broken
(check for continuity between pin 7 on
high voltage pin connection and pin 10
on low voltage board) or low voltage
board needs replacing.
66
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