Float Switch Check And Cleaning; Float Switch Check; Float Switch Cleaning - Hoshizaki MODULAR CUBELET SERENITY SERIES FS-1022MLH-C Service Manual

E. Float Switch Check and Cleaning

1. Float Switch Check

1) Remove the front panel, then move the power switch to the "OFF" position.
2) Move the control switch to the "DRAIN" position.
3) Move the power switch to the "ON" position.
4) Allow the water to drain from the evaporator, then move the power switch to the "OFF"
position and the control switch to the "ICE" position.
5) Unplug the unit from the electrical outlet.
6) Remove the control box cover.
7) Remove CB K8 connector and check F/S continuity. Both the UF/S and LF/S should
be open. Check continuity between CB K8 connector pin #5 black (BK) (common) wire
and K8 connector pin #6 red (R) (UF/S) wire. Next, check continuity between CB K8
connector pin #5 black (BK) (common) wire and K8 connector pin #7 dark blue (DBU)
(LF/S) wire. If both are open, continue to step 5. If either are closed, follow the steps in
"IV.E.2. Float Switch Cleaning." After cleaning F/S, check UF/S and LF/S again. Replace
if necessary.
8) Replace CB K8 connector in its correct position.
9) Plug the unit into the electrical outlet, then move the power switch to the "ON" position
and let the water reservoir fill.
10) Once the reservoir is full and GM starts, move the power switch to the "OFF" position.
11) Unplug the unit from the electrical outlet.
12) Remove CB K8 connector and check F/S continuity. Both the UF/S and LF/S should be
closed. Check continuity between CB K8 connector pin #5 black (BK) (common) wire
and K8 connector pin #6 red (R) (UF/S) wire. Next, check continuity between CB K8
connector pin #5 black (BK) (common) wire and K8 connector pin #7 dark blue (DBU)
(LF/S) wire. If either are open, follow the steps in "IV.E.2. Float Switch Cleaning." After
cleaning F/S, check UF/S and LF/S again. Replace if necessary.
13) Replace CB K8 connector in its correct position. Replace the control box cover in its
correct position.
14) Plug the unit into the electrical outlet, then move the power switch to the "ON" position
to start the automatic icemaking process.
15) Replace the front panel in its correct position.

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on F/S. Scale on F/S can cause
inconsistant operation of UF/S and LF/S. In this case, both UF/S and LF/S should be
cleaned and checked.
1) Remove the front panel, then move the power switch to the "OFF" position.
2) Unplug the unit from the electrical outlet.
2) Remove F/S assembly from the reservoir cover. See Fig. 5.
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