Hoshizaki F-500BAJ Service Manual page 26

2. Float Switch Cleaning
Depending on local water conditions, scale may build up on FS. Scale on FS can cause
the floats to stick. In this case, FS should be cleaned and checked.
1) If not already removed, remove the front panel.
2) Move the power switch to the "OFF" position, then unplug the appliance from the
electrical outlet (F-300BAJ) or turn off the power supply (F-500BAJ).
3) Remove the float switch assembly from the reservoir cover. See Fig. 4.
4) Wipe down FS assembly with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts
warm water.
5) 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. See Fig. 4. Installing the floats
upside down will affect the timing of FS operation.
6) Rinse FS assembly thoroughly with clean water and replace in its correct position.
7) Plug the appliance back into the electrical outlet (F-300BAJ) or turn on the power supply
(F-500BAJ), confirm the control switch is in the "ICE" position, then move the power
switch to the "ON" position to start the automatic icemaking process.
8) Replace the front panel in its correct position.
Legend: CB–control board; FS–float switch; GM–gear motor; LFS–lower float switch;
UFS–upper float switch; WV–inlet water valve
Red (R)
(upper float switch)
Black (BK)
(common)
Dark Blue (DBU)
(lower float switch)
Magnet (towards top)
Upper Float (blue)
Magnet (towards top)
Lower Float (white)
Spring Retainer Clip
Plastic Retainer Clip
26
Fig. 4