Manitowoc Ice Machine IY0686C

Inspect the bridge connecting the cubes for thickness

Is the bridge thickness approximately 1/8" (3 mm)?

Adjust the ice thickness probe adjustment screw if necessary

Place a 9/32" (7 mm) drill bit between the ice thickness probe and the evaporator for initial adjustment

Make final adjustments to achieve a 1/8" (3 mm) thick bridge

Ensure the ice thickness probe wire doesn’t restrict movement of the probe

Cycle ice machine with the on/off button

Ice Machine starts - Run the system to see if the control trips at the rated pressure

If HPCO opens at a pressure significantly lower or higher than the control setting of 450 psig, replace the HPCO

If the control opens at the correct pressure, find the root cause

Ice Machine Does Not Start - Continue with the next step

Perform testing within the 60 minute time delay period

Check for 24 volts at terminals V & C on the ice machine control board

Check for 24 volts at terminals C & HPC1

Perform keystrokes on the display

Press Menu, scroll down to Service and press the right arrow

Scroll down to Diagnostics, press the right arrow and select Diagnostics

Display reads Control Board, press right arrow

Scroll down to enbl relays and press right arrow to start control board test

Verify control board relays are energized

Test for line voltage at the individual components

Is line voltage present and the component non-functional?

Verify bin switch, curtain/damper, and curtain/damper magnet are in place

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)

Open and close the ice damper(s) repeatedly while observing the display and control board lights

Curtain switch cycles open/closed and control board light energizes/de-energizes

Curtain switch remains closed and control board light remains on

Verify the ice machine is in the harvest cycle

Check if the harvest valve is energized

Measure voltage at the air pump connector

Verify there is no continuity through the motor windings using a volt ohm meter

Replace motor if there is no continuity