Viking VCSB360 Service Notebook page 36

PROBLEM
Door will not close or will
Not seal
The electronic control board, located inside the refrigerator control cover, controls the operation of the
motorized air door, the thermistor and the evaporator fan motor.
120 volts AC is supplied to the electronic control board through the BK wire and operates the circuit as
follows:
1. To open the baffle: 120 volts AC is supplied to the baffle motor through the Y/R wire and
switch SW1 (Fig.31-C). The motor rotates 270* from the "closed" position (Fig.31-A) to the
open" position where it contacts SW1 which opens and parks the motor.
2. To close the baffle: 120 volts AC is supplied to the baffle motor through the W/BR wire and
Switch SW2 (Fig.31-C). The motor rotates 90* from the "open" position (Fig.31-B) to the
"closed" position where it contacts SW2 which opens and parks the motor.
3. 120 volts AC is supplied through the OR/W wire to the electronic control board which
energizes the evaporator fan motor and supplies low voltage to the thermistor.
POSSIBLE CAUSE
Gasket binding
Door warped
Cabinet racked
THE MOTORIZED AIR DOOR
36
TEST PROCEDURE-TEST
Adjust hinges, add shims if necessary.
Lubricate face of gasket on hinge side
With parawax.
Loosen retainer screws and rack door
To fit cabinet.
Level cabinet; make sure cabinet is
setting solidly at all four corners.