Hoshizaki KM-301BAJ Service Manual page 24

11) Check for continuity across FS leads (2 black (BK) wires). With the water tank full,
FS should be closed. If FS is closed and the icemaker will not switch from the 1-min. fill
cycle to the initial harvest cycle, replace CB. 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 necessary.
Legend: BC–bin control; 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) Remove the louver, then move the control switch to the "OFF" position. Move the
service switch to the "DRAIN" position, then move the control switch to the "SERVICE"
position. Allow the water tank to drain completely.
2) After all of the water has drained, move the control switch to the "OFF" position, then
unplug the icemaker from the electrical outlet.
3) Remove the top and upper rear panels.
4) Locate FS on the compressor base. See Fig. 3. Remove the screw securing FS to the
compressor base and lift FS from the icemaker.
5) Remove the retainer clip from FS shaft, then remove the float. Be careful not to damage
or lose the retaining clip when removing it. See Fig. 4.
6) Wipe down FS housing, shaft, float, and retainer clip with a
mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm
water. Rinse the parts thoroughly with clean water.
7) Reassemble FS assembly and replace and secure it in its
correct position.
8) Replace the upper rear and top panels.
9) Plug the icemaker into the electrical outlet.
10) Move the control switch to the "ICE"
position to start the automatic icemaking
process.
11) Replace the louver in its correct position.
Legend: CB–control board; FS–float switch
Fig. 3
Fig. 4
24
Float Switch
Mounting Screw
Float Switch
Compressor
Float Switch
Shaft
Float Switch
Clip
Float Switch
Float
Float Switch
Housing