Manitowoc S1000M Service Manual

Also see for S1000M: Installation use and care manual

Contents

Manitowoc S1000M Service Manual Manual pdf 62 page image

Electrical System Section 66-24 Part Number 80-1559-3Water Level Control CircuitryWATER LEVEL PROBE LIGHTThe water level probe circuit can be monitored bywatching the water level light. The water level light is onwhen water contacts the probe, and off when no water isin contact with the probe. The water level light functionsany time power is applied to the ice machine, regardlessof toggle switch position.During the freeze cycle, the water level probe is set tomaintain the proper water level above the water pumphousing. The water level is not adjustable. If the waterlevel is incorrect, check the water level probe position.Reposition or replace the probe as necessary.WATER INLET VALVE SAFETY SHUT-OFFIn the event of a water level probe failure, this featurelimits the water inlet valve to a 12-minute on time.Regardless of the water level probe input, the controlboard automatically shuts off the water inlet valve if itremains on for 12 continuous minutes.FREEZE CYCLE CIRCUITRYManitowoc’s electronic sensing circuit does not rely onfloat switches or timers to maintain consistent waterlevel control. During the freeze cycle, the water inletvalve energizes (turns on) and de-energizes (turns off) inconjunction with the water level probe located in thewater trough.During the first 45 seconds of the Freeze Cycle:• The water inlet valve is on when there is no water incontact with the water level probe.• The water inlet valve turns off after water contactsthe water level probe for 3 continuous seconds.• The water inlet valve will cycle on and off as manytimes as needed to fill the water trough.After 45 seconds into the Freeze Cycle:The water inlet valve will cycle on, and then off one moretime to refill the water trough. The water inlet valve isnow off for the duration of the freeze sequence.HARVEST CYCLE CIRCUITRYThe water level probe does not control the water inletvalve during the harvest cycle. During the harvest cyclewater purge, the water inlet valve energizes and de-energizes strictly by time. The harvest water purgejumper may be set at 45 seconds (top and centerterminals) or 0 seconds (center and bottom terminals).Set the harvest water purge to 0 seconds when reverseosmosis or deionized water is used. Use the factorysetting of 45 seconds for all other types of water.45 SECONDJUMPERPOSITION0 SECONDJUMPERPOSITIONHARVEST WATER PURGE ADJUSTMENTSV3139SV3140