Manitowoc SM Series, Installation, Operation And Maintenance Manual

Part Number 000001590 Rev03 11/19 23

Section 4 

Maintenance

Cleaning Procedure

Ice machine cleaner is used to remove lime scale and 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 oz. (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. 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 5 

When the cleaning process stops, disconnect 

power and remove all parts as described in Removal of Parts 

for Cleaning and Sanitizing.

Step 6 

Mix 16 oz (2 cups) cleaner with 2 gal of warm 

water.

Model

Cleaner Amount

Water Amount

SM50

16 oz (473 ml)

2 gal. (8L)

Step 7 

Take all removed components to a sink for 

cleaning. Use 1/2 of the cleaner/water mixture to clean all 

components. The cleaner solution will foam when it contacts 

lime scale and mineral deposits; once the foaming stops, use 

a soft-bristle nylon brush, sponge or cloth (NOT a wire brush) 

to carefully clean the parts.

Step 8 

While components are soaking, use the other 1/2 

of the cleaner/water solution and a nylon brush or cloth to 

clean inside of ice bin. Clean inside of door, door gasket, bin, 

top of evaporator and evaporator bucket. Rinse all areas 

thoroughly with clean water

Step 9 

Mix 1 oz (2 tablespoons) sanitizer with 2 gal of 

warm water.

Model

Sanitizer Amount

Water Amount

Sm50

1 oz (30ml)

2 gal (8L)

Step 10 

Use 1/2 of the sanitizer/water mixture to sanitize 

all removed components. Use a cloth or sponge to liberally 

apply the solution to all surfaces of the removed parts or 

soak the removed parts in the sanitizer/solution. Rinsing is 

not required.

Step 11 

Use the other 1/2 of the sanitizer/water solution 

and a sponge or cloth to sanitize the inside of ice bin. Sanitize 

inside of door, door gasket, bin, top of evaporator and 

evaporator bucket. Rinsing is not required.

Step 12 

Replace all removed components.

Step 13 

Prepare 1/2 oz (1 tablespoon) of undiluted 

Manitowoc Sanitizer.

Step 14 

Reapply power to the ice machine, then 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.

Step 15 

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.

Clean The Top Of The 

Evaporator With A 

Brush