Float Switch Cleaning - Hoshizaki KM-901MAH Service Manual

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on the float switch. Scale on
the switch can cause the float to stick. In this case, the float switch should be cleaned.
1) Turn off the power supply.
2) Remove the front panel, then move the control switch to the "OFF" position.
3) Remove the base cover, then disconnect one end of the pump tubing to drain the water
tank. See Fig. 2. After the water tank has drained, reconnect the pump tubing.
4) Disconnect the vent tube and the flush tube from the top of the float switch, then
remove the float switch assembly and remove the float switch assembly and remove
the rubber boot from the bottom of the float switch assembly. See Fig. 3.
5) Remove the retainer rod from the bottom of the float switch housing, then remove the
float. Be careful not to bend the retainer rod excessively when removing it.
6) Wipe down the float switch housing, shaft, float, and retainer rod with a mixture of
1 part of recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics
Laboratory, Inc.) and 25 parts of warm water. Clean the inside of the rubber boot and
hose with cleaning solution. Rinse the parts thoroughly with clean water.
7) Reassemble the float switch assembly and replace it and the rubber boot in their
correct positions. Reconnect the vent tube and the flush tube.
8) Move the control switch to the "ICE" position.
9) Replace the front panel in its correct position.
Fig. 3
Vent
Flush
Shaft
Float Switch
Housing
Float
Retainer Rod
Rubber Boot
and Hose
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