Diagnostic Information
8
SMR-0003
© Viking Range Corporation
Evaporator plate for DFUW, DUWC, and VUWC wine
coolers
Condenser Fan
The condenser fan is used to force air over the
condenser coil. The fan will cycle on and off with the
compressor which means that when the compressor is
running so is the fan and when the compressor is not
running neither is the fan (see illustration below).
Make sure the motor shaft turns freely. This can
1.
be done by rotating the fan blade by hand and
observing any excessive resistance.
Check for resistance between terminals. If no
2.
resistance is found, replace the condenser fan.
Check for continuity between terminals and fan
3.
casing. If continuity is found, replace the condenser
fan.
Check current draw. Typical current draw will be
4.
0.15 amp without fan resistance. If current draw
is 0.19 amp or more, check for resistance in air
movement or objects touching the fan blade. If this
is not found, replace the condenser fan.
Evaporator
The evaporator uses evaporating refrigerant to remove
heat from the inside of the unit ultimately making the
interior cold. The shape and size of the evaporator may
vary among the models covered by this service manual
but the fundamentals are the same . The DFUW, DUWC,
AND VUWC use a vertical right angle evaporator plate.
The DFUR, DUAR, AND VUAR use a U-shaped plate.
The DFRD, DURD, AND VURD use a multi-purpose
evaporator plate.
It is normal for the evaporator to frost up during its run
cycle. This frost will dissipate once the unit reaches
its “cut out” temperature and the compressor and
fan stop. This condensate water will flow to the rear
of the machine in a condensate pan where it will be
evaporated from compressor and fan heat. It is very
important that the evaporator frosts in a uniform pattern
across the plate (see Evaporator Frost Pattern). A partial
frost pattern can lead to excessive run times and cooling
issues.
Evaporator plate for DFRD, DURD, and VURD
refrigerated drawers
Evaporator plate for DFUR, DUAR, and, VUAR
beverage centers
