BUNN - AXIOM SERIES _ BREWER _ Service Help _ 1 0f 5

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ACCESSING PROGRAM MODES

Press and hold the right hidden switch. The longer you press it, the higher the level you can access. EXAMPLE:

• Pressing for a couple seconds enters Level 1.
• Continuing to press for approximately 5 seconds will access Level 2.
• Continue pressing for approximately 15 seconds to access Level 3.
• During program modes, use the right hidden switch to advance forward through screens.
• Use left hidden switch to step backwards through screens.

VIEWING ASSET AND SERIAL NUMBERS

• Press left hidden switch to view Asset number. 
• Press and release to view serial number. Press and release again to view the installed software  version.

FACTORY BOWOUT MODE

• When in the main screen, DO NOT press both left and right hidden switches at the same time.
• The display will read "FACTORY BLOWOUT" "ON/OFF".
•  WARNING: NEVER activate this mode. It will open the brew and refill valves simultaneously. THIS IS FOR FACTORY USE ONLY. If you accidentally enter this screen, exit out of it by pressing the "ENABLE BREW ON/OFF" switch.

PROGRAMMING LOCK OUT SWITCH [MOUNTED ON MAIN CONTROL BOARD]

• This switch can be set to prevent access to Level 2.
• Turn "OFF" the switch to access Technician (Level 2).
• Once all the correct brew settings are programmed, can set the switch to the "ON" position to prohibit anyone from changing the settings.
• With the switch in the "ON" position, only Level 1 can be accessed by store personnel.
• Technicians can access Level 1 with the switch in either position.
• To enter Levels 2, 3, & 4, press and hold right hidden switch.

COMPONENT ACCESS

• Disconnect the brewer from the power source before the removal of any panel or the replacement of any component.
• All components are accessible by the removal of the top cover or warmer housing, front access panel and warmer plate.

CONTROL BOARD

• Remove the two screws and two nylon washers securing the control board to the front face plate.
• Tilt the control board inward to clear the display section.
• Place the bottom edge of the new control board in the two cradles, tilt the board forward, and secure with the two screws and nylon washers to the front face plate.  The nylon washers must be installed under the heads of the two screws to prevent a possible shorting of the control board circuits.
• Re-install wires & connectors.

BEFORE REPLACEMENT

• If a triac or MOV is visibly burned, it was most likely caused by an external sources such as a shorted wire or damaged solenoid coil.

• The Control Board is located inside the top cover behind the front face plate.

REMOVAL AND REPLACEMENT

• Insert one meter lead in J1-pin 1 and the other lead in J1-pin 2.
• With the power connected to brewer, the voltage reading to the board should be the line voltage rated for that model.
• If no voltage is present, check wiring to the board.
• If voltage is present, and brewer does not power on, replace board.
• Disconnect brewer from power source.
• Disconnect the wires from the relay on the control board.
• Disconnect the 10-pin connector (main harness) and the 3-pin connector (level probe harness) from the control board.
• Disconnect the 10-pin connector (ribbon cable) from the control board.

FACE PLATE REMOVAL

• Disconnect brewer from power source.
• Disconnect the wires from the relay on the control board.
• Disconnect the 10-pin connector (main harness) and the 3-pin connector (level probe harness) from the control board.
• Disconnect the 10-pin connector (ribbon cable) from the control board.
• Drain tank and disconnect/remove faucet.
• Remove the 3 nuts and 1 standoff from back side of faceplate assembly.
• Remove faceplate and control board as an assembly out the front opening.
• Remove the two screws and two nylon washers securing the control board to the front face plate.
• Place the bottom edge of the new control board in the two cradles and secure with the two screws and nylon washers to the front face plate.
• The nylon washers must be installed under the heads of the two screws to prevent a possible shorting of the control board circuits.
• Re-install faucet assembly (if equipped).
• Re-install faceplate/board assembly.
• Re-install wires & connectors.

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