© 2009 Viking Preferred Service
13
Operation
Selector is in the “ON” Position
(continued)
pump has run for two minutes. During all harvest
cycles, evaporator thermistor temperature cannot
terminate harvest cycle until water solenoid is de-
energized. The grid cutter output will always be
energized during harvest cycle, and for the first 35
minutes into production cycle.
If during any production or harvest cycle, selector
switch is put into “CLEAN” position, any cycle in
process will be immediately terminated and a clean
cycle will occur. The unit will then repeat entire
above cycle.
If during any production or harvest cycle, selector
switch is put into “OFF” position, the cycle in
process will be stopped and all loads will de-
energize and remain so as long as the selector
switch remains in “OFF” position.
If during any production or harvest cycle, selector
switch is taken out of “ON” position, a lockout will
be started during which compressor relay will not
re-energize regardless of a switch position.
If during any production or harvest cycle, there
is a power loss/interruption of greater than 25
milliseconds, a lockout delay will begin and
compressor relay will not re-energize upon
reapplication of power until lockout delay is
complete. The lockout delay begins with loss of
power and is unaffected by duration of power loss.
All other loads will operate normally during lockout.
The setpoints are as follows:
• Stop ice: 35.0 degrees F +/- 2 degrees F
• Start ice: 43.0 degrees F +/- 2 degrees F
• Harvest: 11.0 degrees F +/- 2 degrees F
• Production: 45.0 degrees F +/- 2 degrees F
• Setpoint versus Temperature and Voltage
(120VAC): +/- 3 degrees F
Selector is in the “CLEAN” Position
IMPORTANT:
The assumptions before proceeding
are: water is supplied to ice machine (see Section
Water Requirements section), proper electrical
power supplied to ice machine (see Electrical
Requirements Section), drain is properly plumbed
or drain pump is operating properly, and bin and
evaporator thermistors are not defective. The
refrigeration system components, compressor,
condenser fan, and hot gas valve, are never on in
the clean cycle.
Upon setting selector switch to “CLEAN” position
during production or harvest cycle, clean cycle will
immediatelystart, terminating harvest or production
cycle. Refer to Timing/Operation Diagram in Figure
The following sequence will now occur:
1. LED indicator on control will light for 10
seconds upon start of clean cycle. See,
Electronic Controller section, for LED location.
2. The water solenoid will energize for three
minutes and then de-energize. The circulation
pump will energize.
3. After 30 minutes, the circulation pump will
de-energize and the drain solenoid will energize.
4. After 75 seconds, the drain solenoid will de-
energize and the water solenoid will energize.
5. After three minutes, the water solenoid will
de-energize and the circulation pump will
energize.
6. After 10 minutes, the circulation pump will
de-energize and the drain valve will energize.
7. After 75 seconds, the drain solenoid will
de-energize. The clean cycle is now complete.
All loads will remain off as long as selector switch
remains in “CLEAN” position and power is not
removed andreapplied.
If at any time during a clean cycle, selector switch
is moved from “CLEAN” position, all loads except
the drain solenoid will de-energize (this includes
“OFF” position). The drain solenoid will energize
for 75 seconds and then de-energize. The unit will
now operate normally according to whether it is in
“OFF” or “ON” position.
