Hoshizaki FD-1001MWH(-C) EN - Manual (Page 69)

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E. Float Switch Check and Cleaning
1. Float Switch Check
1) Remove the front panel and move the power switch to the "OFF" position. Move the
control switch to the "DRAIN" position.
2) Move the power switch to the "ON" position.
3) Allow the water to drain from the reservoir, then move the power switch to the "OFF"
position and the control switch to the "ICE" position.
4) Remove the molex plug from the control box and check continuity across the float
switch wires. Black (BK) to red (R) for the upper float and black (BK) to dark blue (DBU)
for the lower float. See Fig. 9. With the water reservoir empty, the float switches are
open. If open, continue to step 5. If closed, follow the steps in "IV.E.2. Float Switch
Cleaning." After cleaning the float switches, check them again. Replace if necessary.
5) Replace the molex plug on the control box.
6) Move the power switch to the "ON" position and let the water reservoir fill.
7) Once the reservoir is full and the gear motor starts, move the power switch to the "OFF"
position.
8) Remove the molex plug from the control box and check continuity across the float
switch wires. Black (BK) to red (R) for the upper float and black (BK) to blue (DBU) for
the lower float. They should be closed. Clean or 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 floats to stick. In this case, the float switch should be cleaned and
checked.
1) Turn off the power supply.
2) Remove the float switch assembly from the reservoir cover. See Fig. 10.
3) Wipe down the float switch assembly with a mixture of 1 part Hoshizaki "Scale Away" 25
parts warm water. Rinse the assembly thoroughly with clean water.
4) While not necessary, the floats can be removed from the shaft during cleaning. If you
remove them, note that the blue float is on top. The floats must be installed with the
magnets inside them towards the top of the switch. Installing the floats upside down will
affect the timing of the float switch operation. See Fig. 9.
5) Rinse the float switch assembly thoroughly with clean water and replace in its original
position.