Repair manual

Page 4
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 personnel.
 • 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per-
manent. 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sole-
noids 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 avoid twists and kinks in the tubing.
 • Makecertainthatallplumbingconnectionsaresealedandelectricalconnectionstightandiso-
lated.
 • Thisbrewerisheatedatalltimes.Keepawayfromcombustibles.
WARNING
 • Exerciseextremecautionwhenservicingelectricalequipment.
 • Disconnectthebrewerfromthepowersourcewhenservicing,exceptwhenelectricaltestsare
specified.
 • Followrecommendedserviceprocedures.
 • Replaceallprotectiveshieldsorsafetynotices.
Screen Displayed
Possible Cause
Troubleshooting Procedures
1. Overflow cup is full of water. This
could be caused by boiling. Refer to
SET TEMP and REFILL sections in
Programming Manual.
1. Soft Heat Server not correctly
positioned on base.
2. Not using a Soft Heat Server, and
the SERVER DETECT function is
activated (on).
Empty cup. Correct cause and
retry.
Position the server so that the con-
nector pins on the server make con-
tact with connector on the brewer.
Disable the SERVER DETECT func-
tion.
OVERFLOW CUP
FULL. EMPTY CUP
SERVER NOT
IN PLACE
(SH Models only)
41746 112008