Manitowoc SM Series, Installation, Operation And Maintenance Manual

22 

Part Number 000001590 Rev03 11/19

Maintenance 

Section 4

In Place Cleaning/Sanitizing Procedure

This procedure allows monthly in place cleaning of all 

surfaces that come in contact with the water system. The 

ice machine requires disassembly and cleaning/sanitizing 

a minimum of once every 12 months. The quality of your 

potable water supply may require more frequent cleaning 

intervals.
Use ice machine cleaner to remove lime scale or other 

mineral deposits. Ice machine sanitizer disinfects and 

removes algae and slime.
NOTE: All ice must be removed from the bin.

Step 1 

Prepare 4 oz (1/2 cup) of undiluted Manitowoc 

Ice Machine Cleaner (part number 000000084 only) in a 

container that will fit easily under the lifted water shutters. 

Refer to “Component Identification” on page 17 to identify 

the water shutters.

Model

Amount of Cleaner

SM50

4 ounces (120 ml)

Step 2 

Press the clean switch. The ice machine will initiate 

a 2 minute harvest to remove any remaining ice from the 

evaporator.

Step 3 

Remove all ice from the bin.

Step 4 

Wait 3 minutes until the Clean light flashes, then 

add the prepared Manitowoc Cleaner by lifting the water 

shutters and pouring directly into the spray area.

Step 5 

The ice machine will automatically time out a ten 

minute cleaning cycle, followed by eight rinse cycles, and 

stop. The Clean light will turn off to indicate the clean cycle is 

complete. This entire cycle lasts approximately 30 minutes.

Step 6 

Prepare 1/2 oz (1 tablespoon) of undiluted 

Manitowoc Ice Machine Sanitizer (part number 9405653 

only) in a container that will fit into the same area.

Model

Amount of Sanitizer

SM50

1/2 Ounce (15ml)

Step 7 

Press the Clean switch. Wait 3 minutes until the 

Clean light flashes, then add the prepared Manitowoc 

Sanitizer by lifting the water shutters and pouring directly 

into the spray area. The ice machine will automatically time 

out a ten minute sanitizing cycle, followed by eight rinse 

cycles, and stop. The Clean light will turn off to indicate 

the sanitizing cycle is complete. This entire cycle lasts 

approximately 30 minutes.
NOTE: The ice machine will automatically continue from the 

previous point before the clean cycle was initiated.

A.  If the ice machine was in the ice making cycle, the 

control board will start ice making again.

B.  If the ice machine was in the off cycle, the control 

board will turn off.

Step 8 

Step 8 Mix a solution of 1/4 oz. (7.4 ml) of sanitizer 

and 1/2 gallon (1.9 L) of water. Use a spray bottle, sponge or 

cloth to sanitize the bin. Rinsing is not required