© 2009 Viking Preferred Service
37
Diagnostics
Problem
Probable Cause
Correction
Unit operates but does not
produce any ice.
Evaporator thermistor does
not have sufficient contact with
evaporator or out-of-range.
Check to see that the evaporator thermistor
is secured properly to the evaporator. If secured, check
resistance value with Table C in Section 5.2, Thermistors.
Leak in sealed system.
Check for any leaks. If leak found, repair, evacuate, and
re-charge unit.
Ice cubes are too small
(less than 1/2 inch thick).
Low ice consumption.
Ice is slowly melting in the ice bin and will affect the size of
the ice cubes. aThis is normal operation. When the ice bin
needs to be replenished, cubes will return to regular size.
Not enough water in reservoir.
Make sure that the reservoir drain plug is installed prop-
erly. Check the water line to the unit to make sure there
are no restrictions or kinks in the line. Check all filters to
make sure they are not restricted or plugged.
Unit is freestanding.
Ice cubes can be anywhere from 3/8 to 1/2 inch thick
when freestanding. Make sure back panel is installed if
you continueto use in freestanding position.
Distributor tube is restricted.
See “Cleaning Your Ice Machine” section for cleaning the
unit for proper operation.
Build-up of deposits on
evaporator plate.
See “Cleaning Your Ice Machine” section for cleaning the
unit for proper operation and cube size.
Inadequate drain system.
Restriction in drain lines will cause ice in the bin to melt
to a thinner cube. If using a gravity drain, make certain
there are no kinks or restrictions in the drain lines. If using
a drain pump, check the inlet screen, discharge line, and
vent line for any build-up or restrictions.
Leaking drain valve
See “Cleaning Your Ice Machine” section for cleaning the
unit. This will also dissolve and flush out foreign material
in the drain valve causing it to leak.
Room temperature is too cold.
Move to an area where temperature is above
55 degrees F.
Ice cubes are too big
(greater than 3/4 inch
thick).
Ice slab not releasing.
See “Cleaning Your Ice Machine” section for cleaning the
unit for proper operation and cube size.
Condenser fan air flow is re-
stricted.
Make certain the grille in the front of the unit is free and
open for proper air circulation. Check and clean the con-
denser coil by removing the grille in the front of
the unit. Clean the condenser with a vacuum and brush
attachment.
Room temperature is too warm.
Move to an area where temperature is below
90 degrees F.
Evaporator thermistor does
not have sufficient contact with
evaporator or out-of-range.
Check to see that the evaporator thermistor
is secured properly to the evaporator. If secured, check
resistance with “Resistance versus Temperature Chart”
page 27, Thermistors.
Hollow ice slab
Distributor tube is restricted.
See “Cleaning Your Ice Machine” section for cleaning the
unit for proper operation.
Build-up of deposits on
evaporator plate.
See “Cleaning Your Ice Machine” section for cleaning the
unit for proper operation and cube size.
Low water level in reservoir.
Make sure that the reservoir drain plug is installed prop-
erly. Check the water line to the unit to make sure there
are no restrictions or kinks in the line. Check all filters to
make sure they are not restricted or plugged.
Leak in the sealed system.
Check for any leaks. If leak found, repair, evacuate, and
re-charge unit.
