Bunn JDF-2N - Manual (Page 21)

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TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Department.
• Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-
nel.
• All electronic components have 120-240 volt ac and low voltage dc potential on their terminals. Shorting of
terminals or the application of external voltages may result in board failure.
• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will
help to avoid twists and kinks in the tubing.
• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
• This brewer is heated at all times. Keep away from combustibles.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the brewer when servicing, except when electrical tests are specified.
• Follow recommended service procedures.
• Replace all protective shields or safety notices.
All water LED's flash.
Cold Water Circulation
All dispense stations not working
or all water & refill LED's flash and
beep 3 times.
Note: Cooling failure or excessive
bath and cabinet temperatures for
m ore than 4 hours will result in
touchpad lockout or no dispense.
Note: Reset faul/timer by unplug-
ging unit.
1. Bath water level low.
1. Cabinet cooling fan.
2. Bath recirculation pump.
3. Restricted water flow to cabinet
water coil and bath.
Access bath fill valve and top off
bath tank.
Replace fan (24vdc).
Note: Fan receives power when door
switch is closed.
A) If not running, replace pump
(120vac).
B) If no power, replace control
board.
Clean or replace cabinet water
strainer or recirculating manifold
or check for kinked hose.
PROBLEM PROBABLE CAUSE REMEDY