172 Part Number STH025 11/16
DIAGNOSTICS
1. Verify bin switch, curtain/damper and curtain/
damper magnet are in place.
• Press the Menu button.
• Scroll down to Service and press right arrow.
• Scroll down to Diagnostics and press right arrow
• Scroll down to Inputs and press right arrow to display
curtain switch readings (Curt SW1, Curt SW2, etc).
2. Open and close the ice damper(s) repeatedly while
observing the display and control board lights.
A. Curtain switch cycles open/closed and control
board light energizes/de-energizes - Bin switch
is operating normally
B. Curtain switch remains closed and control
board light remains on - Go to step 3
C. Curtain switch remains open and control board
light remains off - Go to step 3
3. Disconnect bin switch wire from control board.
4. Jumper control board bin switch wire to ground,
press the power button and observe the display and
control board lights.
A. Curtain switch closes, control board light
energizes and ice machine starts - Replace bin
switch
B. Curtain switch remains open and control board
light is off - Verify procedure was correctly
followed - Replace control board.
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