Viking VCSF036SS Service Book page 29

Component Description
Control board See Control Board section for
troubleshooting information.
Ice Maker See Ice Maker section for service
information.
ECM Condenser fan moves cooling air across
condenser condenser coil and compressor body.
motor
Condenser fan motor is in parallel circuit
with compressor.
Evaporator fan Evaporator fan moves air across
motor evaporator coil and throughout
refrigerator cabinet.
Refrigerator Single pole, single throw switch
light switch completes circuit for light when door is
open.
Freezer light/ Single pole, Double throw switch
Interlock completes circuit for light when door is
switch open. Completes circuit for dispenser
when door is closed.
Water valve Controls water flow to the ice maker.
Controlled by thermostat in ice maker.
See Ice Maker section for further
information.
Defrost timer Timer motor operates only when freezer
control is closed.
After specified amount of actual
operating time, inner cam in timer throws
the contacts from terminal 4, compressor
circuit, to terminal 2, defrost
thermostat/defrost heater circuit. After
specified defrost cycle time, timer cam
resets the circuitry through terminal 4 to
compressor.
©2007 Viking Preferred Service
Component Testing
Test Procedures
Check resistance across motor. If no resistance
across motor, replace motor.
1. Disconnect power to unit.
2. Disconnect fan motor leads.
3. Check resistance from ground connection
solder. Trace to motor frame must not exceed
.05 ohms.
4. Check for voltage at connector to motor with
unit in refrigeration mode and compressor
operating.
Check resistant across terminals.
Switch arm depressed
• "NO" terminals Open
Switch arm up
• "NO" terminals Closed
Check resistant across terminals.
Switch arm depressed
• "NO" terminals Open
• "NC" terminals Closed
Switch arm not depressed
• "NC" terminals Open
• "NO" terminals Closed
Check resistance across coil windings.
1. To check timer motor winding, check for
continuity between terminals 1 and 3 of timer.
2. Depending on rotating position of the cam,
terminal 1 of timer is common to both terminal
2, the defrost mode, and terminal 4, the
compressor mode. There should never be
continuity between terminals 2 and 4.
3. With continuity between terminals 1 and 4,
rotate timer knob clockwise until audible click
is heard. When the click is heard, reading
between terminals 1 and 4 should be infinite
and there should be continuity between
terminals 1 and 2.
4. Continuing to rotate time knob until a second
click is heard should restore circuit between
terminals 1 and 4.
29