Ice Maker User Manual
7
2. Features
The control board provides the following safeguards:
• Provides component protection during low water supply.
• Purges remaining ice in the evaporator at startup and shutdown.
• Provides short cycle protection for the compressor. 
a) LED Lights
The "POWER" LED indicates control voltage and will remain on unless a control 
voltage problem occurs. An LED illuminates for each relay as it is energized. For more 
information, see "II.C. Sequence of Operation."
Icemaking
Cycle (Relay) LED
Energized
Components
Time LEDs are 
On
Frequency LEDs are 
On
Fill  POWER only WV N/A As Needed
Ice Purge (X)
GM GM, HTR 60 seconds N/A
Freeze (X, X)
GM, COMP
GM, HTR, 
Comp, FMS
N/A N/A
Drain Valve (X6) FLUSH DV 0 Minutes Every  Hours
Dispensing
 Relay LED
Energized 
Component
Time LEDs are 
On
Frequency LEDs are 
On
Ice Dispense (X4)
Push Button
DM 
IDM
60 seconds 
maximum
N/A
Opti Serv
ICE 
Agitating Motors (X3) AM AM .6 seconds
Every  seconds of 
accumulative dispense 
time
Water Dispense (X5)
(Opti Serv Only)
WTR WTR N/A N/A
Legend: AM–agitating motors, Comp–compressor; DV–drain valve; FMS–self-contained
     fan motor; GM–gear motor; HTR–extruding head heater; IDM–ice dispensing   
     motor, shutter solenoid; WTR–dispensing water valve; WV–inlet water valve










