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
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7) Startup–"POWER OK" LED is on: Move the power switch to the "ON" position,
then move the control switch to the "ICE" position. CB "POWER OK" LED is on.
IMPORTANT!Appliance will not start unless the safety switch is engaged.
"POWEROK" LED Diagnosis:Check that CB "POWER" LED is on. If not, check for
proper power supply voltage (115VAC) input to CT. If 115VAC is not present, check the
breaker, power switch, and safety switch. Next, check that the PPR (DCM-75_H(-OS)
only) is de-energized and contacts between PPR #6(BR) and #2(BK) are closed.
Check for proper control voltage (24VAC) output from CT. Next, check the 24VAC 1A
fuse. Ifopen, replace fuse. Check for 24VAC at CB K8#1(W/R) to CB K8 #2 (LBU).
If24VAC is not present, check continuity of control switch. If open, replace. If24VAC is
present between CB K8 #1 (W/R) and CB K8 #2 (LBU), and "POWER OK" LED is off,
replace CB.
BC Diagnosis: Remove the bin cover and check that the actuator paddle is not
engaged (switch closed). Check for continuity across BC proximity switch. This can be
checked at CB K8 #3 GY and CB K8 #4 GY. When BC proximity switch is closed 0VDC
is read across CB K8 #3(GY) and CB K8 #4 (GY). 5VDC is present between CB K8 #3
(GY) or
CB K8 #4(GY) to CB K4 pin #1 (pin closest to CB black K3). If 5VDC is not present,
replace CB. Note: Be sure safety switch is engaged while checking voltages.
HPS Diagnosis: HPS automatically resets when refrigeration circuit high-side pressure
is within an acceptable range. 5VDC is supplied from CB K9 #3 (Y) and back onto CB
K9 #4 (Y). If 5VDC is not present at CB K9 #3 (Y) to CB K4 pin #1 (pin closest to CB
black K3) and CB "POWER OK" LED is on, replace CB. Ifrefrigerant pressures have
returned to an acceptable range and HPS does not close, replace HPS. Ifpressures
have not equalized, and refrigeration circuit high-side pressure does not drop, recover,
evacuate, and recharge if necessary. On air-cooled model, check that the condenser
is not dirty or clogged, check for proper FMoperation and fan blade for binding. On
water-cooled model, check WRV and water ow in and out of condenser. Check for
refrigeration circuit refrigerant restriction (TXVand drier).
8) Fill Cycle – "WTRIN" LED is on. WV energizes. The 90-sec. low water safety timer
begins. LFS closes. Nothing occurs at this time. The reservoir continues to ll until UFS
closes, terminating the 90-sec. low water safety timer, starting the 30-min. freeze timer,
and de-energizing WV. Diagnosis: Check that "WTRIN" LED turns on and water lls
the reservoir. If not, check for water supply line shut-off valve closed, restricted water
lters, and restricted WV screen. Next, check for 24VAC at CB K2 #8 (O or W/BR) to
neutral (LBU). If 24VAC is not present, replace CB. If 24VAC is present, turn off the
power switch, disconnect the WV wires and check WV solenoid continuity. If open,
replace WV. Reconnect WV wires, move the power switch to the "ON" position, then
check that DV is not leaking by. Check that WV shuts off when UFS closes.
Note: Low Water Safety– If UFS remains open 90 sec. after WV energizes, a 1-beep
alarm sounds. This alarm resets automatically once UFS closes.