Service Tools; Troubleshooting - Bunn Ultra Technical Training Manual

Troubleshooting

Service Tools

SERVICE TOOLS?
NO
TEST OUTPUTS
NO
The components that can be individually tested are as
follows:
Left & Right Auger Motor Forward & Reverse Rotation
Left & Right Refrigerant Valve
Refill Threshold (Ultra with LAF Kit Installed)
This function allows the operator to adjust the Refill Threshold depending on the type of product being dispensed.
Test Refill: Test menu by turning on the output to the corresponding water valve.
The water threshold is factory set at 155, a common threshold used throughout the Bunn beverage equipment. The
number on the left can be used as a tool to see the operation of the refill circuit and can be adjusted accordingly to
the conductivity (TDS) of the product or water. The threshold 155 normally will not need to be adjusted on the Ultra
machine but is mainly for geographical areas where naturally soft water is present or customers using water purifica-
tion systems (reverse osmosis) on coffee equipment.
Example: Product reads "8 on L REFILL 155" menu when product is touching level probe. Product leaves level
probe and the 8 starts increasing in value, the number will go higher than the threshold of 155, the CBA will activate
the refill circuit to turn on and fill the hopper. Once product touches the level probe, the product number reading on
the left will come down below the threshold setting number 155 and indicate to the CBA that the level probe is satis-
fied
(number < 155) with product. The refill circuit is satisfied and will turn off.
Number range 0 – 255
Threshold 155 – adjustable for natural soft water condition or use of water filter purification.
Reading < than 155 means satisfied or shorted circuit
Reading > than 155 means call for refill or open circuit
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Ultra Training Manual
The ULTRA machine features a Service Tool menu. Enter programming and
navigate to the menu and depress the button under Yes.
YES
Test Outputs: This will allow the operator to test the operation of individual
components and outputs of the control board.
YES