Service Manual
ManualsBrandsHoshizaki ManualsCommercial Countertop Ice Makers and DispensersDCM-300BAH-OS 26" Opti-Serve Series Sanitary Cubelet Ice Machine and Dispenser with 321 lbs. Daily Ice Production, Built-In 40 lbs. Ice Storage, CleanCycle12, H-GUARD Plus, and Corrosion Resistant Stainless Steel Exterior: Stainless Steel
Table Of Contents
- Important Safety Information
- I. Specifications
- II. General Information
- III. Technical Information
- IV. Service Diagnosis
- V. Removal and Replacement of Components
- A. Service for Refrigerant Lines
- B. Important Notes for Component Replacement
- 1. Upper Bearing Wear Check
- 2. Removal and Replacement of Extruding Head
- 3. Removal and Replacement of Auger
- 4. Removal and Replacement of Evaporator
- 5. Removal and Replacement of Mechanical Seal and Lower Housing
- 6. Removal and Replacement of Gear Motor
- 7. Dispense Auger and Agitator
- 8. Dispense or Agitating Motor
- VI. Cleaning and Maintenance
- VII. Disposal
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3. Opti-Serve (OS) Sensors
Be sure to check all items in section "IV.F.2. Ice/Water Dispense" prior to using this chart.
Use the following charts along with the wiring diagram to troubleshoot the OS sensors.
Ice Sensor
1. OS Sensor a) Dirty.
b) Defective. See chart 3a and 3b.
2. Control Board a) No power to infrared sensor.
b) Not reading infrared sensor signal.
Water Sensor
1. OS Sensor a) Dirty.
b) Defective. See chart 3c.
2. Control Board a) No power to infrared sensor.
b) Not reading infrared sensor signal.
3a. Ice Dispense "Continuous"
Component Control Board Sensor To Control Board /Other Sensor Engaged Disengaged
Solenoid K2 Pin 6 (LBU wire) - To Neutral/GND - 120VAC 0VAC
Sensor K5 Pin 4 (W/0 wire) (R wire) To
K5 Pin 5 (Y wire) (W wire) 5VDC 0VDC
K5 Pin 6 (W/BR wire) (BK wire) 5VDC 5VDC
3b. Ice Dispense "Portion"
Component Control Board Sensor To Control Board /Other Sensor Engaged Disengaged
Solenoid K2 Pin 6 (LBU wire) - To Neutral/GND - 120VAC 0VAC
Sensor K5 Pin 1 (W/R wire) (R wire) To
K5 Pin 2 (W/BU wire) (W wire) 5VDC 0VDC
K5 Pin 3 (W/BK wire) (BK wire) 5VDC 5VDC
3c. Water Dispense
Component Control Board To Control Board /Other Engaged Disengaged
Solenoid K2 Pin 8 (DBU wire) To K4 Pin 2 (LBU wire) 24VAC 0VAC
Sensor K5 Pin 7 (R wire) To
K5 Pin 8 (W wire) 5VDC 0VDC
K5 Pin 9 (BK wire) 5VDC 5VDC