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15) Disconnect the black float switch connector from the K5 connector on the control board.
16) 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 FS is open, confirm that the water tank is full. If the water tank is not full, check the
water supply, water filters, and inlet water valve. If the water tank is full, follow the steps
in "II.F.2. Float Switch Cleaning." After cleaning FS, check it again. Replace if needed.
Legend: CB–control board; FS–float switch
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 and move the control switch to the "OFF" position.
3) Remove the front insulation panel, then remove splash guard, cube guide B, and cube
guide A. Next, remove the overflow cap, overflow pipe, and water shield. See Fig. 3.
4) Remove the drain plug and drain the water tank. Replace the drain plug in its correct
position. Be careful not to cross thread it.
5) Replace the water shield, overflow pipe, overflow cap, cube guide A, cube guide B,
splash guard, and front insulation in their correct positions. NOTICE! Be careful not to
cross thread the overflow pipe.
6) Disconnect the vent tube and flush tube from the top of the float switch, then remove the
float switch and rubber boot.
7) 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. See Fig. 4.
8) 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 Hoshizaki "Scale
Away" 25 parts of warm water. Rinse the parts thoroughly with clean water.
9) Reassemble the float switch assembly and replace it and the rubber boot in their correct
positions. Reconnect the vent tube and the flush tube.
10) Move the control switch to the "ICE" position.
11) Replace the front panel in its correct position.
12) Turn on the power supply to start the
automatic icemaking process.
Legend: CB–control board; FS–float switch; PM–pump motor
30
Vent
Shaft
Float Switch
Housing
Float
Retainer Rod
Fig. 4
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