Viking VCBB536 Service Manual page 50

Service Diagnostics and Procedures–Disassembly
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power to unit using power
switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure
correct earth ground and polarization. After servicing, reconnect power using power switch.
Evaporator Fan
The unit uses a fan motor to pull air over the
evaporator coil and circulate it throughout the unit.
1. To access the evaporator fan motor, open and
remove freezer door (press release clips forward
on door glides to disengage door).
Freezer Door
Release Clip
2. Remove ice maker (see Access Ice Maker
Module, Motor and support section). Remove
evaporator fan cover and screws. Remove
screws securing back wall.
Screws
© 2009 Viking Preferred Service
WARNING
Screws
Screws
Evaporator Fan Cover
3. Disconnect wiring and remove back wall.
Evaporator fan is now accessible.
Defrost Heater
The freezer section evaporator fan is a 120
VAC motor and can be tested from the High
Voltage Board. (Refer to High Voltage board
access).
With the main power switch OFF, remove the
Yellow wire from E2 on the HV board. Using
an Ohm reading, Apply one lead to
the yellow wire and the other to Neutral (E9).
The resistance should be approximately
30.3 ohms.
When the fan relay is energized, Line voltage
is sent to E2 and then to the Freezer fan
motor. If voltage is present and no fan
movement, replace fan motor.
4. Reverse procedure to reinstall.
Evaporator Fan
50