Bunn G9WD RH Manuel Du Propriétaire

14

 

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 volts ac and low voltage dc potential on their terminals.  Shorting of 

terminals or the application of external voltage may result in board failure.

•  Intermittent operation of electronic circuit boards is unlikely.  Board failure will normally be permanent.  Of 

an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a 

terminal or crimp.

•  Make certain that all electrical connections are tight and isolated.

•  Exercise extreme caution when servicing electrical equipment.

•  Turn power OFF when servicing, except when electrical tests are specified.

•  Follow recommended service procedures.

•  Replace all protective shields or safety notices.

Grinder will not start

1.  Motor overload protector

2.  No power

3.  START button

4.  Circuit board

Remove the metal plug located 

on the right side of the housing.  

Press the red “Reset” button.  Lis-

ten carefully for a “click”.  This re-

sets the motor protection circuit 

and indicates that the motor may 

have encountered an overload.  (An 

overload can occur when some-

thing other than coffee is inserted 

into the hopper for grinding)

Check the voltage at the power cord 

with a voltmeter.  Voltage must be 

120 volts across the black and 

white wires.

Use “TEST SWITCHES?” menu 

under “SERVICE TOOLS?” menu 

in level 1 functions to test START 

button.

Circuit board.  Check that there is 

24VDC to the relay coil when the 

Start button is pressed.

41451.0001  111909