Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagram
- II. Sequence of Operation and Service Diagnosis
- III. Controls and Relays
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
15
D. Float Switch Check and Cleaning
1. Float Switch Check
1) Move the control switch to the "DRAIN" position.
2) Remove the upper rear panel.
3) Allow the water system to drain for 1 min.
4) Move the control switch to the "OFF" position, then unplug the appliance from the
electrical outlet.
5) Remove bell connectors from FS black (BK), blue (BU), and red (R) wires.
Checkcontinuity between black (BK) (common) and red (R) (UFS) and between black
(BK) (common) and blue (BU) (LFS). If both are open, continue to step 6. If either are
closed, follow the steps in "II.D.2. Float Switch Cleaning." After cleaning FS, check UFS
and LFS again. Replace if necessary.
6) Cap the FS appliance wires. Black (BK), red (R), and blue (BU).
7) Plug the appliance into the electrical outlet, then move the control switch to the "ICE"
position.
8) Once the reservoir overows, move the control switch to the "OFF" position, then unplug
the appliance from the electrical outlet.
9) Check continuity between black (BK) (common) and red (R) (UFS), and between black
(BK) (common) and blue (BU) (LFS). If either are open, follow the steps in "II.D.2. Float
Switch Cleaning." After cleaning FS, check UFS and LFS again. Replace if necessary.
10) Reconnect FS wires to the appropriate appliance wires. Black (BK) to black (BK), red
(R) to brown (BR), and blue (BU) to blue (BU).
11) Replace upper rear panel in its correct position.
12) Plug the appliance into the electrical outlet, then move the control switch to the "ICE"
position to start the automatic icemaking process.
Legend: FS–oat switch; LFS–lower oat switch; UFS–upper oat switch
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on FS. Scale on FS can cause
inconsistent operation of UFS and LFS. In this case, FS should be cleaned and checked.
1) Move the control switch to the "OFF" position, then unplug the appliance from the
electrical outlet.
2) Remove the upper rear panel.
3) Remove FS assembly from the reservoir cover.
4) Wipe down FS assembly with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts
warm water. Rinse the assembly thoroughly with clean water.
5) While not necessary, the oats can be removed from the shaft during cleaning. If you
remove them, note that the blue oat is on top (UFS) and the white oat is on bottom
(LFS). See Fig. 2. The oats must be installed with the magnets inside them towards the
top of the switch. Installing the oats upside down will affect the timing of FS operation.