Manitowoc Ice S1800 Diagnosing Water Level Control Circuitry, Wait until the freeze cycle starts

Section 6 Electrical System

DIAGNOSING WATER LEVEL CONTROL CIRCUITRY

Problem: Water Trough Overfilling During The

Freeze Cycle

Step 1 Start a new freeze sequence by moving the ICE/ OFF/CLEAN toggle switch to OFF, then back to ICE. (if water flows with the switch off, check the water inlet valve).

Step 2 Wait until the freeze cycle starts

(the freeze cycle starts when the water pump energizes).

Step 3 Disconnect water level probe wire from control board and connect a jumper from the control board terminal and any cabinet ground, then refer to chart.

Important

This restart must be done prior to performing diagnostic procedures. This assures the ice machine is not in a freeze cycle water inlet valve safety shut off mode. You must complete the entire diagnostic procedure within 6 minutes of starting.

Important

For the test to work properly you must wait until the freeze cycle starts, prior to connecting the jumper wire. If you restart the test you must disconnect the jumper wire, restart the ice machine, (step 1) and then reinstall the jumper wire after the compressor starts.

GREEN WATER LEVEL LIGHT

WATER LEVEL PROBE CONNECTION

SV3135

Step 3

Step 3 Jumper wire connected from control board terminal to ground

Is water flowing into	The Water Level	The Water Inlet Valve	Cause
the water trough?	Light is:	Solenoid Coil is:
NO	ON	De-Energized	The water level probe is causing the problem.
			Clean or replace the water level probe.
YES	ON	Energized	The control board is causing the problem.
YES	OFF	De-Energized	The water fill valve is causing the problem.

Part Number 80-1634-3 6-25