Service Manual
ManualsBrandsHoshizaki ManualsCommercial Countertop Ice Makers and DispensersDCM-751BAH 35" Stanitary Cubelet Ice Machine and Dispenser with 801 lbs. Daily Ice Production, Built-In 70 lbs. Ice Storage, Corrosion Resistant Stainless Steel Exterior, Advanced CleanCycle24 Design, and Push Button Operation: Stainless Steel
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagrams
- II. Sequence of Operation and Service Diagnosis
- III. Controls and Adjustments
- A. Control Board Layout
- B. LED Lights and Audible Alarm Safeties
- C. Settings 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. Bin Control Shutdown Delay (S1 dip switch 8)
- 7. Factory Use (S1 Dip Switch 9 & 10)
- D. Power Switch, Control Switch, and Dispense Mode Switch
- IV. Removal and Replacement of Components
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
33
Transfor mer Input
#7 (W/R)
A. Control Board Layout
1. DCM-751B_H
Drain Valve
#10 (W/BU)
• K6 Connector
Open
• "SERVICE" Button
(Ice Purge Cycle Bypass)
Transformer 24VAC Input
#1 (W/R)
Upper Float Switch
#6 (R)
Mechanical Bin Control
#3 to #4 (GY)
Gear Motor Protect Relay Circuit
#5 to #6 (W/O)
Relay De-Energized-Open-5VDC
Relay Energized-Closed-0VDC
High-Pressure Switch
#3 to #4 (Y)
Open-5VDC
Closed-0VDC
Control Switch
#1 to #2 (W/BK)
"ICE"-Open-5VDC
"DRAIN"-Closed-0VDC
• "POWER OK" LED
Transformer 24VAC Neutral
#2 (LBU)
Lower Float Switch
#7 (DBU)
Float Switch Output
#5 (BK)(+)
• S1 Dip Switch
• K9 Connector
• K8 Connector
• K7 Connector
• K2 Connector
Fig. 9a
5VDC Ground (GND) Terminals
• K1 Connector
#3 GM (DBU)
#2 GM Voltage
Input (BR)
Inlet Water Valve
#8 (W/BR)
Transformer Input
#9 (W/R)
5VDC
115VAC
24VAC
5VDC
5VDC
115VAC
24VAC
Continuous Ice Dispense
Signal #2 (Y)
Water/Ice Dispense
Output #3 (BR)(+)
Portion Ice Dispense
Signal #5 (R)
Water Dispense Signal
#8 (DBU)
24VAC Input
#5 (W/R)
115VAC Input
#3 (BK)
Agitating Motor
#4 (O)
Dispense Motor
#2 (P)
115VAC Input
#3 (BK)
Dispense Water
Valve #6 (W/O)
LED Legend:
AM-agitating motor
COMP-compressor
FLUSH-drain valve
GM-gear motor
ICE-dispense motor
WTRDP-water dispense valve
WTRIN-inlet water valve