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
20
c. Gear Motor Protect Relay (GMPR)
CB K9 connector pins #5 (W/O) and #6(W/O): When GMPR is de-energized,
GMPR terminals #3 and #5 are open and 5VDC is present between
CBK9connector pin #5 (W/O) and CB red K4connector pin closest to CBblack
K3 connector. If 5VDC is not present, replace CB. When GMPR is energized, GMPR
terminals #3 and #5are closed and 5VDC is present between CB K9 connector
pin #5 (W/O) and pin #6(W/O) to CB red K4 connector pin closest to CB black
K3connector. If GM is energized and GMPR terminals #3 & #5 are open, an 8-beep
alarm occurs. See "III.B. LED Lights and Audible Alarm Safeties."
• 5VDC CB K8 Connector: See Fig. 2.
5VDC CB K8 Connector
Component Pin # (Wire Color)
Bin Control (BC) #3 (GY) and #4 (GY)
Float Switch (FS) Common #5 (BK) Common
Upper Float Switch (UFS) #6 (R)
Lower Float Switch (LFS) #7 (DBU)
d. Bin Control (BC)
CB K8 connector pins #3 (GY) and #4 (GY): When BC is closed (calling for ice),
5VDC is present between CB K8 connector pin #3 (GY) and pin#4(GY) to CB red
K4 connector pin closest to CB black K3 connector. If5VDC is not present on either
pin, replace CB. If 5VDC is present on pin#3(GY) and not on pin #4 (GY), BC is
open. See "II.D. Bin Control Check."
e. Float Switch (FS): CB K8 connector pins #5 common (BK), #6 UFS (R), and
#7LFS (DBU): 5VDC is present between CB K8 connector pin #5common (BK)
and CB red K4 connector pin closest to CB black K3connector at all times. If 5VDC
is not present, replace CB. For further oat switch diagnostics, see "II.E. Float Switch
Check and Cleaning."
Red positive
test lead to red
K4 connector
pin closest
to black K3
connector
Fig. 2
Red Positive
Test Lead
Black Negative
Test Lead
Multimeter
5VDC
Control Board K8 Connector
Bin Control (GY)
Upper Float Switch (UFS) (R)
Float Switch (FS) Common (BK)
Lower Float Switch (LFS) (DBU)