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Service Mode is entered by holding any two of the buttons on the face of the machine while powering up the brewer.
The brewer firmware revision number is displayed for a couple of seconds when entering this mode. The table below
list the items that may be programmed along with available values or settings. Use the center brew button to
advance through the items and the left and right button to decrement or increment the values/selection respectively.
These items are programmed at the factory and will typically not need adjustment. For coffee only brewers (no 2
valve) ignore the dilution calibration and cold calibration volume. Use the center button to advance through those
items.
Item Selected
Water Temperature
Pulse Heating
New in version 2 of
121753 control board
End of Cycle Beeper
Brew Pump Speed
Not Used
Pump Calibration
Hot Calibration Vol
Dilution Calibration
Cold Calibration Vol
Water Fill Flow Rate
Water Filter Capacity
Power Mode
Power Down/Save
Time
Brew Counter
Service Data
Exit
Pump Calibration:
Pump calibration is necessary when the pump speed is changed or if the brewer is delivering substantially more or
less beverage than what it has been programmed for in the user mode. Pump speed may be adjusted up or down if
required to deliver water at a faster or slower rate to meet a specific beverage taste profile. Calibration tells the
brewer control how much hot water is delivered within a specific time frame so it can adjust the time required to run
to deliver the desired brew volumes.
Ensure the brew basket is in place. Place a suitably graduated container in place below the brew basket to capture
and measure the water delivered. To calibrate, enter the service mode as noted above and advance to the "CAL"
screen. Press either the left or right brew button and water delivery will begin. If the brewer has not reached
operating temperature, it will finish heating before automatically starting. The pump will cycle on and off for
approximately 2 minutes at which time the currently programmed volume is displayed. Use the left and right button
to decrement or increment the value to the measured value. For better accuracy, you may want to measure a couple
of cycles and average the measured values. At the least, the system should be primed before calibration by allowing
a partial brew cycle to run (10-15 secs).
Note: User mode will be entered automatically when exiting the service mode if calibration values have been
changed.
Screen
Values
Example
Available
200
170-205
Off
On, OFF
On
On, OFF
b:05
1-10
F:05
2-10
CAL
N/A
39.0
25.0-99.9
CLd
N/A
24
20-150
0.30
Off, 0.05-1.40
100
Off, 500-2500
nor
nor, SAV, dn
4:00
OFF, 0:30-
4:00
0-999
N/A
Srv
N/A
End
N/A
Comment
Degrees F
Must be OFF for mechanical relay. May be on or off for solid
state relay, on is preferred. If brewer has a heat sink on the
back, this indicates it has a solid state relay for tank heater.
Used to audibly indicate brew cycle has completed with a
series of beeps.
Pump speed used for brewing
No effect. Unused feature.
See instructions below. Must be done if pump speed
modified.
Ounces. Only displays if calibration cycle was run.
Press left or right button to run dilution valve calibration.
Ounces delivered during cold water dilution.
Adjustable in increments of .05 GPM. Should match flow rate
through valve.
In tens of gallons. 50=500 gallons. Increments are 500
gallons.
Normal, Power Down, or Power Save.
Hours:Minutes from last brew until brewer enters the selected
power mode. No effect if mode is "Off".
Shows number of brew cycles since last reset (up to 999).
Used to view temperature & probe data. See Service Data
below.
Use left or right button when displayed to exit this mode.
3
Man PN 121751 Rev 20170617
nd
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