Bunn G9WD RH Manuel D’Utilisation

13

 

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