Float Switch Check And Cleaning - Hoshizaki DCM-270BAH Service Manual

E. Float Switch Check and Cleaning
1. Float Switch Check
1) Remove the front, top, and left side panels, then move the control switch to the "DRAIN"
position.
2) After the water has drained from the reservoir, remove the FS molex plug from the
control box and check continuity across FS wires. Common (BK) to UFS (R) and
common (BK) to LFS (BU). See Fig. 7. With the reservoir empty, float switches are open.
If open, continue to step 3. If closed, follow the steps in "II.E.2. Float Switch Cleaning."
After cleaning, check them again. Replace if necessary.
3) Replace the FS molex plug on the control box.
4) Move the control switch to the "ICE" position.
5) The reservoir fills. Once UFS closes GM starts.
6) Move the control switch to the "OFF" position.
7) Remove the FS molex plug from the control box and check continuity across FS wires.
Common (BK) to UFS (R) and common (BK) to LFS (BU). With the reservoir full, float
switches are closed. If open, follow the steps in "II.E.2. Float Switch Cleaning." After
cleaning, check them again. Replace if necessary.
8) Move the control switch to the "ICE" position.
9) Replace the left side, top, and front panels in their correct positions.
2. Float Switch Cleaning
Depending on water conditions, scale may build up on FS. Scale on the switch can cause
the floats to stick. In this case, FS should be cleaned and checked.
1) Remove the front, top, and left side panels, then move the control switch to the "DRAIN"
position.
2) After the water has drained from the reservoir, move the control switch to the "OFF"
position and the power switch to the "OFF" position.
3) Remove FS assembly from the reservoir cover. See Fig. 8.
4) Wipe down FS assembly with a mixture of 1 part Hoshizaki Scale Away and 25 parts
warm water. Rinse the FS assembly thoroughly with clean 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. 8. 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) Move the control switch to the "ICE" position.
7) Replace the left side, top, and front panels in their correct positions.
8) Move the power switch to the "ON" position to start the automatic icemaking process.
Legend: Comp–compressor; FS–float switch; GM–gear motor
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