Viking DFUW244CL, Service Manual

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During a defrost cycle the compressor, condenser fan, and the coldest compartment fan are off. The
compartment fan in the warmest compartment will run for a total of 30 minutes.
7.1.2.2 Replacing Compartment Fans
1) Replace compartment fans by removing the 2 Phillips screws on each side of fan assembly (See
figure 12.19).
2) Pull fan away from evaporator cover to disconnect Molex connection.
3) Depress the release clips on each side of the Molex plug and separate from the wire harness con-
nection.
4)
Reverse above steps to replace.
7.1.3 Heater / Fan Assembly
There is a heater / fan assembly located inside each compartment. These heater / fans are used to add
heat into the specific compartment as needed to maintain the desired set-point.
During a call for heat (cut-in) the compartment fan will de-energize. The compartment heater / fan for
that compartment will then energize.
The compressor and condenser fan will continue to run if the other compartment is still calling for cool
-
ing.
7.1.3.1 Heater / Fan Operation
Typical compartment call for heat cycle:
At cut-in temperature:
On: Heater / Fan
Off: Compressor, Condenser Fan, & Compartment Fan
At cut-out temperature:
Off: Compressor, Condenser Fan, Compartment Fan, Heater / Fan
A call for heating cycle is terminated if the set point is changed to less than 49˚F.
If a compartment has a call for heat while the other compartment is satisfied.
The compressor and condenser fan will de-energize.
The heater / fan for the call for heat compartment will energize.
The compartment fan for the satisfied compartment will remain off to prevent the circulation of non-
cooled evaporator air from being circulated into the satisfied compartment.
SE
E PHOTO SECTION FOR REFERENCE TO ABOVE MENTIONED FIGURES
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2010 - Viking Preferred Service SMR-0005