Bunn single tf brewwise dbc Operating Guide

Page 40

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 - 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 fittings 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. 

  

• 

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.

1. 1. Overflow cup is full of water. 

This  could  be  caused  by  boiling; 

see  chart  on  page  32.  Also  could 

be Refill Sensitivity adjustment; see 

page 33.

Empty  cup.  Correct  cause  and 

retry.

1. SMART FUNNEL not fully inserted 

into the funnel rails.

2.  Not  using  a  SMART  FUNNEL, 

and the FUNNEL DETECT function 

is activated (on).

Position the funnel so that the sensor 

is directly beneath the sensor coil on 

the brewer.

Disable the FUNNEL DETECT func-

tion.

OVERFLOW CUP

FULL. EMPTY CUP

NO FUNNEL

PRESENT

35879.1 071405