Service and Repair Manual

8
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qualiedserviceperson-
nel.
• 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ttings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specied.
  • 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; Powder
Auto-Fill door lamp is OFF
Product level in ULTRA is lower
than level Probe - ULTRA running;
Powder 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
disconnected.
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.
41087.1 060112