Hoshizaki MWH KM-515MAH, MRH/3, MRH KM-901MAH, MWH(-M), KM-320MAH Float Switch Cleaning

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on FS. Scale on the switch can cause the float to stick. In this case, FS 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. 3. After the water tank has drained, reconnect the pump tubing.

4)Disconnect the vent tube and the flush tube from the top of FS, then remove FS assembly and remove the rubber boot from the bottom of FS assembly. See Fig. 4.

5)Remove the retainer rod from the bottom of FS housing, then remove the float. Be careful not to bend the retainer rod excessively when removing it.

6)Wipe down FS housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki

"Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water.

7)Reassemble FS assembly and replace it and the rubber boot in their correct positions.

Reconnect the vent tube and the flush tube.

8)Replace the base cover in its correct position.

9)Move the control switch to the "ICE" position.

10)Replace the front panel in its correct position.

11)Turn on the power supply to start the automatic icemaking process.

Legend: CB–control board; FS–float switch

Vent

Flush

Shaft

Float Switch

Housing

Float

Retainer Rod

Rubber Boot

and Hose

Fig. 4

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