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) (F-C CB Only)
- 8. Factory Use (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
16
2a) 5VDC CB K9 Connector Continued:
a) Control Switch"DRAIN" Position
CB K9 connector pins #1 (W/BK) and #2 (W/BK):
• "ICE" Position: When the control switch is in the "ICE" position, CB K9 connector
pin#1and pin #2are open. 5VDC is present between CB K9 connector
pin #1(W/BK) and pin #2 (W/BK). If not, check control switch position and
continuity (open). Replace as needed. Next, conrm 5VDC between pin
#1 (W/BK) and CBred K4 connector, pin closest to CBblack K3connector. If 5VDC
is not present, replace CB.
• "DRAIN" Position: When control switch is in the "DRAIN" position, CB K9 connector
pin #1 (W/BK) and pin#2(W/BK) are closed. 0VDC is present between pin
#1(W/BK) and pin#2 (W/BK). If not, check control switch position and continuity.
Next, conrm 5VDC is present between both CB K9 connector pin #1(W/BK) and
pin #2 to CBred K4connector, pin closest to CB black K3 connector. If5VDC is not
present on both pins, replace CB.
b) High-Pressure Switch (HPS)
CB K9 connector pins #3 (Y) and #4 (Y): When HPS is closed, 5VDC is present
between both CB K9 connector pins #3(Y) and pin #4 (Y) to CB red K4 connector
pin closest to CB black K3 connector. If5VDC is not present on pin #3 (Y) or pin
#4(Y), replace CB. If 5VDC is present on CBK9connector pin #3 (Y) and not on CB
K9connector pin #4 (Y), HPS is most likely open. CB sounds a 3-beep alarm. Check
HPS continuity. If HPS is open and CB is not in alarm, replace CB.
c) Compressor Control Relay (CCR)
CB K9 connector pins #5 (W/O) and #6(W/O): When CCR is de-energized (GM off),
CCRterminals #3 and #5 are open and 5VDC is present between CBK9connector
pin #5 (W/O) and CBK9connector pin #6(W/O). If5VDC is not present, check CCR
continuity between terminals #3 and #5. If open, replaceCB. When CCR is energized,
CCR terminals #3 and #5close and 0VDC is present between CB K9 connector pin
#5 (W/O) and pin #6(W/O). 5VDC is present between CB K9 connector pin #5 (W/O)
to CB red K4 connector pin closest to CB black K3connector and CB K9 connector
pin #6 (W/O) to CB red K4 connector pin closest to CB black K3connector. If GM is
energized and CCR terminals #3& #5 are open, an 8-beep alarm occurs. See "III.B.
LED Lights and Audible Alarm Safeties." If CCR terminals #3 and #5 are closed and
0VDC is present between CB K9 connector pin #5 (W/O) and pin #6(W/O), Comp
delay timer starts. IfComp does not energize after Comp delay timer terminates
(1-min. "F-A" CB E-0 (H) and later and "F-C" CB dip switch 8 off or 5-min. "F-A" CB
E-0(G) and earlier dip switch 8 on), replace CB.