9
TROUBLESHOOTING
Symptoms
Entire Home Screen “Grayed Out”
13. Touch Screen Not Illuminated or ON
14. Irregular or Low Flow Out of Dispense
Nozzle and/or Brew Pump Operating
Unusually Louder During Brew Dispense
Note: Pump motor decreases or in-
creases RPM to maintain flow rate
c. Tank Temperature Too Low
d. Open or Failed Door Interrupt Switch
e. See Information Bar and/or Active
Notice icon for additional causes
a. Main power supply
b. Machine On/Off Switch
c. Universal Power Supply 24.0VDC
d. Input/Output Board
e. Circuit Breaker
a. Upper piston filter screen com-
promised, coffee grounds escaping
chamber
b. An obstruction in the coffee dispense
path.
c. Brew Lockout feature enabled. Found
under Machine Settings icon/Tempera-
ture tab
d. Close the open door. The switch opera-
tion “closed/open” can be viewed under
the Service icon/Sensor tab
e. Troubleshoot and/or test components
relating to the additional cause
a. Check outlet for power
b. Turn ON main power switch
c. Test machine On/Off switch
c. 24.0VDC must be present on the output
side of the power supply.
d. 24.0VDC must be present across the
Input/Output control board connector
terminals J11-1 (+) and J11-7 (-)
e. I f Input/Output & High Voltage circuit
boards are powered (LED's On), but
display is not powered, reset and/or test
circuit breaker.
a. Replace upper piston screen
b. Clean or replace upper piston screen,
dispense solenoid valve.
Unscrew dispense nozzle, remove and
clean internal parts.
PROBABLE CAUSE REMEDY
MACHINE MESSAGES, SYMP-
TOMS and/or ACTIVE NOTICES
Continued >
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