Service Tools; Test Outputs - Bunn My Cafe AP Technical Training Manual

Troubleshooting and Repair
The My Café AP brewer features on-board troubleshooting. Since all of the machine's components are controlled or
activated by the control board, you can access various service tool menus to test load components or sensors.
The troubleshooting menus give you control to activate load components for the purpose of seeing operation or test-
ing of load components with a volt meter. Input sensors and switches can also be tested with a volt meter but usually
can be viewed for correct operation by means of viewing symbols or wording on the test menu to show the sensor or
switches are operating correctly.
Programming Lockout Switch
The programming lockout switch is located on the main control board. This switch can be set
to prevent access to the programming settings of the brewer. Once all the correct brew settings
are programmed, the operator can set the switch to the "On" position to prohibit anyone from
changing the settings. With the switch in the "On" position, the programming menus can still be
accessed to view the current settings. However, no changes will be saved.
To access the lockout switch:
Step 1: Disconnect brewer from power source before removing any panel.
Step 2: Access the rear of the machine.
Step 3: Remove the rear panel by removing six standard screws.
"On Position/Locked"
The following menu screens will appear to inform you that programming is locked, but still can be accessed to view
current settings.

Service Tools

To access SERVICE TOOLS enter Level 1 Programming without lockout switch activated. Once the BREW LOCK-
OUT menu is displayed, you will navigate to the SERVICE TOOLS by pressing and releasing the "Hidden Switch"
consecutively. If you pass the intended menu, you can step backwards in the programming by pressing and releasing
the "Small Brew" switch while you are in Level 1 Programming.
Select YES to enter into the SERVICE TOOLS function. Under the Service Tools menu are three menus that can be
used to help assist the troubleshooting process: Test Outputs, Test Switches and Set Refill.

Test Outputs

TEST OUTPUTS?
NO YES
Load Components
Test Index Motor - 12vdc
Water Inlet xxx - 120vac
Air Pump - 12vdc
Vent Valve - 12vdc
Hot Water Air Pump - 12vdc
Water Pump - 120vdc
Tank Heater Relay - Surface mounted on CBA. Listen for activation (click sound).
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My Caf é AP Training Manual
!!! CAUTION !!!
MEMORY IS LOCKED
SERVICE TOOLS ?
NO
TEST OUTPUTS will give you the option of turning On and Off the output voltage to the
load component individually. A voltmeter can be used across the load component to
measure the output voltage when commanded.
CONSTANT CHANGE
IS NOT POSSIBLE
YES