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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 personnel.
• All electronic components have 120 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.
• Keep away from combustibles.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
PROBLEM
PROBABLE CAUSE
REMEDY
ULTRA and Powder Auto-Fill do not
run - Main power on ULTRA is OFF
Product level in ULTRA is lower than
level Probe - ULTRA running; Pow-
der Auto-Fill door lamp is OFF
Product level in ULTRA is lower than
level Probe - ULTRA running; Pow-
der Auto-Fill door lamp flashes ON
and OFF
1. ULTRA power cord disconnected
or main power switch in ON posi-
tion.
1. The ULTRA DAY/NIGHT setting is
in the NIGHT mode.
2. Powder Auto-Fill power cord dis-
connected.
3. Powder Auto-Fill main power
switch in OFF position.
5. Powder Auto-Fill door is open.
1. Low product in Powder Auto-Fill.
Check that the power cord is con-
nected to proper electrical source
and that the ULTRA main power
switch is in the ON position.
1. The ULTRA DAY/NIGHT setting
should be in the DAY mode.
2. Check that the Powder Auto-Fill is
plugged into the top of the ULTRA
auger motor cover.
3. Select the ON position of the main
power switch.
5. The Powder Auto-Fill door should
be closed securely.
Remove hopper and fill with pow-
dered mix.
29793.1 021202