Service Manual
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. Bin Control Shutdown Delay (Infrared Sensor) (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)
- 7. Bin Control Shutdown Delay (S1 dip switch 9)
- 8. Audible Alarm Silencer (S1 Dip Switch 10)
- D. Switches
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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2. Opti-Serve Model
CB K8 connector pins #7 (R), #8 (P), and #9(BK): Before engaging the water
dispense OS sensor, check for the correct VDC from the locations given in the
"Disengaged" column in the table below. If the VDC is different than in the table,
replace CB. If the VDC is correct, engage the OS sensor. "WTRDP" LED turns on.
If not, conrm that the water dispense signal VDC matches the "Engaged" column
in the table below. If not, replace the OS sensor. If the VDC matches the "Engaged"
column below and the "WTRDP" LED does not turn on, replace CB.
5VDC CB K7 Connector
Component Pin # (Wire Color) To CB VDC Ground Disengaged Engaged
VDC Sensor Ground #7 (R)
To
Red K4 pin #1
(closest to CB
black K3)
0VDC 0VDC
Water Dispense Signal #8 (P) 0VDC 5VDC
5VDC Power Supply #9 (BK) 5VDC 5VDC
Fig. 4
Multimeter
5VDC
Control Board K7 Connector
Water Dispense (P)
(switch signal)
Water Dispense (R)
(VDC GND)
Water Dispense (BK)
(5VDC power)
Red test lead
to CB red
K4 pin #1 (pin
closest to CB
black K3)
Red Test Lead
Black Test Lead