Float Switch Cleaning - Hoshizaki KM1601SRH350 Service Manual

9) Move the control switch to the "ICE" position. Replace the insulation panel and the
front panel in their correct positions, then turn the power supply on. After 1 minute,
the 1 minute fill cycle should end and the initial harvest cycle should begin. If the initial
harvest cycle begins, the float switch is good and the check is complete. If the initial
harvest cycle does not begin, continue to step 10.
10) Turn off the power supply.
11) Remove the front panel.
1) Move the control switch to the "OFF" position.
13) Remove the control box cover.
14) Disconnect the black float switch connector from the K5 connector on the control board.
15) Check for continuity across the float switch leads. With the water tank full, the float
switch should be closed. If the float switch is closed and the icemaker will not switch
from the 1 minute fill cycle to the initial harvest cycle, replace the control board.
If open, confirm that the water tank is full. If the tank is not full, check the water supply,
water filters, and inlet water valve. If the tank is full, follow the steps in "II.E.. Float
Switch Cleaning." After cleaning the float switch, check it again. Replace if necessary.

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.
) Remove the front panel and move the control switch to the "OFF" position.
3) Remove the insulation panel, then remove the cap located on the front bottom part of
the ice dropping hole. Drain the water tank.
4) Replace the cap in its correct position. Be careful not to cross thread it.
5) Disconnect the vent tube and the flush tube from the top of the float switch, then
remove the float switch assembly from the mounting bracket and remove the rubber
boot from the bottom of the assembly.
6) Remove the retainer rod from the bottom of the float switch assembly, then remove the
float. Be careful not to bend the retainer rod excessively when removing it.
7) Wipe down the float switch assembly's housing, shaft, float, and retainer rod and clean
the inside of the rubber boot and hose with a mixture of 1 part of recommended cleaner
Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics Laboratory, Inc.) and 5 parts of
warm water. Rinse the parts thoroughly with clean water.
8) Reassemble the float switch. Replace the rubber boot and float switch in their correct
positions. Reconnect the vent tube and the flush tube.
9) Move the control switch to the "ICE" position.
10) Replace the insulation panel and front panel in their correct positions.
11) Turn on the power supply to start the automatic icemaking process.
19