Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagram
- A. Construction
- B. Icemaking Unit
- C. Water/Refrigeration Circuit Diagram
- II. Sequence of Operation and Service Diagnosis
- A. Sequence of Operation Flow Chart
- 1. Icemaking and Drain Cycle
- 2. Shutdown
- B. Service Diagnosis
- 1. Ice Production Check
- 2. Diagnostic Procedure
- C. Control Board Check
- D. Bin Control Check
- E. Float Switch Check and Cleaning
- F. Diagnostic Tables
- III. Controls and Adjustments
- A. Control Board
- B. Controls and Adjustments
- 1. Default Dip Switch Settings
- 2. Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, 3).
- 3. Drain Frequency Control (S1 dip switch 4)
- 4. Continuous Dispensing Timer (S1 dip switch 5 & 6)
- 5. Bin Control Selector (S1 dip switch 7)
- 6. Agitation and Ice Purge Timer (S1 dip switch 8)
- 7. Mechanical Shutdown Delay (S1 dip switch 9)
- 8. Factory Use (S1 Dip Switch 10)
- C. Power Switch and Control Switch
- IV. Refrigeration Circuit and Component Service Information
- A. Refrigeration Circuit Service Information
- B. Component Service Information
- V. Maintenance
- VI. Disposal
- VII. Technical Information
- A. Specification & Performance Data Sheets
- 1. F-300BAJ
- 2. F-500BAJ
- B. Wiring Diagrams
- 1. F-300BAJ
- 2. F-500BAJ
26
Red (R)
(upper oat switch)
Black (BK)
(common)
Dark Blue (DBU)
(lower oat switch)
Upper Float (blue)
Magnet (towards top)
Magnet (towards top)
Lower Float (white)
Plastic Retainer Clip
Spring Retainer Clip
Fig. 4
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on FS. Scale on FS can cause
the oats 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 oat 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 oats can be removed from the shaft during cleaning. If you
remove them, note that the blue oat is on top. The oats must be installed with the
magnets inside them towards the top of the switch. See Fig. 4. Installing the oats
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), conrm 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–oat switch; GM–gear motor; LFS–lower oat switch;
UFS–upper oat switch; WV–inlet water valve