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. Controls 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, Agitation, and Ice Purge Timer (S1 dip switch 8)
- 7. Bin Control Shutdown Delay (S1 dip switch 9)
- 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
25
3) Fill Cycle–"WTRIN" LED is on: "WTRIN" LED turns on only when the reservoir water
level is low enough to open LFS. Diagnosis: Conrm LFS is open. If "WTRIN" LED
is off and LFS is open and the control switch is in the "ICE" position (open), replace
CB. If "WTRIN" LED is on and water is not lling the reservoir, check for 24VAC at
CBK2connector between pin #8 (O or W/BR) and a neutral (LBU). If the "WTRIN"
LED is on and 24VAC is not present between CB K2 connector pin # 8 (O or W/BR)
and neutral (LBU), conrm 24VAC at CB K2 connector between pin #7 (R or W/R) and
a neutral (LBU). If 24VAC is present between CB K2 connector pin #7 (R or W/R) and
a neutral (LBU) and not between CBK2connector pin #8 (O or W/BR) and a neutral
(LBU), replace CB.
24VAC CB K2 Connector
Connector Pin # (Wire Color) To Neutral (LBU)
LFS
Open
LFS
Closed
K2 (CB input power) Pin #7 (R or W/R)
To
K8 pin #2 (LBU)
24VAC 24VAC
K2 (WV power) Pin #8 (O or W/BR) 0VAC 24VAC
4) Ice Purge Cycle–"GM" LED is on: "GM" LED turns on once UFS closes (reservoir
full). If UFS is closed and "GM" LED is off, replace CB. If "GM" LED is on but GM does
not start, check for 115VAC from CB K1 connector pin #3 (DBU or P) to a neutral (W).
If 115VAC is not present, conrm 115VAC from CB K1 connector pin #2 (BR) to a
neutral (W). If 115VAC is present on CB K1 connector pin #2 (BR) but not on CB
K1 connector pin #3 (DBU or P), replace CB. Once GM energizes, CCR energizes and
ice purge timer (5-min.) starts.
5) Freeze Cycle–"GM" and "COMP" LED are on: Ice purge timer (1-min. or 5-min.)
terminates or press the "SERVICE" button on CB after the "GM" LED turns on to bypass
ice purge cycle. WARNING! Risk of electric shock. Care should be taken not to
touch live terminals. After ice purge timer (1-min. or 5-min.) terminates, "COMP" LED
turns on. If not, conrm CCR contacts are closed. See step "II.C.2a)c). Compressor
Control Relay (CCR)." If CCR contacts are closed, replace CB. If "COMP" LED turns
on and Comp does not start, check for 115VAC from the CB X1 brown (BR) wire and
red (R) wire to a neutral (W). If 115VAC is present on CB X1 brown (BR) wire and not
on CB X1 red (R) wire, replace CB. If 115VAC is present on CB X1 red (R) wire and
Comp is not energized, check Comp external overload, start capacitor, start relay, motor
windings, locked rotor.
Legend: AM–agitating motor; BC–bin control; CB–control board; Comp–compressor;
CCR–compressor control relay; CT–control transformer; DCT–drain cycle timer
(1-hr.); DV–drain valve; EH–evaporator heater; FM–fan motor; FS–oat switch;
FT–ll timer (90-sec. low water safety); GM–gear motor; IPT–ice purge timer;
LFS–lower oat switch; UFS–upper oat switch; WV–inlet water valve