Service Manual

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11) Drain Cycle
a) 1-in-1 Drain Cycle: DV energizes once every hour when the 1-in-1 drain cycle is
activated (S1 dip switch 4 in the "OFF" position (factory default position)). GM,
FM, Comp continue. DV energizes for 2 sec. every hour. This setting is
recommended for optimum icemaker performance. The 1-in-1 drain cycle allows any
sediment to drain from the evaporator without interrupting the icemaking process.
b) 1-in-12 Drain Cycle (optional): DV energizes once every 12 hours when the 1-in-12
drain cycle is activated (S1 dip switch 4 in the on position (optional)). 12-hour drain
cycle timer terminates, Comp de-energizes. GM, and FM continue. The 5-min.
ice purge timer starts. When the 5-min. ice purge timer terminates, GM and FM
de-energize. 10-min. DT starts, DV energizes. After 10-min. DT terminates, DV
de-energizes icemaking process restarts and 12-hour drain cycle timer starts.
c) Manual Drain: Manual drain is used when servicing evaporator components and
cleaning and sanitizing the unit. When the unit is making ice and the control switch
is moved to the "DRAIN" position, there is a 3-sec. delay, then Comp de-energizes
and the 5-min. ice purge timer begins. When the 5-min. ice purge timer terminates,
GM and FM de-energize. DV energizes to drain the evaporator and reservoir.
Toavoid the 5-min. shutdown delay, turn off the power supply, then move the control
switch to the "DRAIN" position. Turn on the power supply. DV energizes to drain the
evaporator and reservoir. DV de-energizes when the control switch is moved to the
"ICE" position.
10) Shutdown
a) Auxiliary Code: E-0: Bin lls with ice activating BC proximity switch. BC opens
(actuator paddle engaged). CB shuts down the icemaker within 10 sec.
Auxiliary Code: F-0 and Later: Bin lls with ice activating BC proximity switch.
CB starts 90-sec. Comp shutdown timer. Once 90-sec. Comp shutdown timer
terminates, Comp and FM de-energize and 60-sec. GM shutdown timer starts. Once
60-sec. GM shutdown timer terminates, GM de-energizes and icemaker is off.
Shutdown Diagnosis: Check that BC actuatour paddle is activated and not sticking.
Check BC proximity switch continuity. When BC actuator paddle is down (icemaking),
BC proximity switch is closed. When BC actuator paddle is up BC proximity switch is
open. If not, replace BC proximity switch. If BC proximity switch is open and Comp, FM,
and GM do not de-energize, replace CB. See "II.C. Control Board Check Procedure."
Note: Dip Switch 9 becomes active with aux. code F-0 and later. This allows for
management between fast shutdown and slow shutdown. Default setting for F-0 and
later is for slow shutdown Dip Switch 9 "OFF" position. Dip switch 9 can be moved to
the "ON" position for fast-timing (shutdown within 6 to 10 sec.).
Legend: BC–bin control; CB–control board; CCR–compressor control relay;
Comp–compressor; DV–drain valve; EH–evaporator heater (-Cmodel);
FM–fan motor; GM–gear motor; GMR–gear motor relay; LFS–lower oat switch;
UFS–upper oat switch; WV–inlet water valve