Bunn H5M Guía Del Usuario

6

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 – 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 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 fittings 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.

•  This dispenser is heated at all times. Keep away from combustibles.

•  Exercise extreme caution when servicing electrical equipment.

•  Disconnect the dispenser from the power source when servicing, except when electrical tests are speci-

fied.

•  Follow recommended service procedures

•  Replace all protective shields or safety notices

Problem

Equipment will not operate.

Probable Cause

1. No power or incorrect voltage

2. Safety overflow switch

10267 071900

Remedy

(A) Check the terminal block for the cor-

rect voltage. It should be:

a.)  100  to  120  volts  ac  across  the  black 

and  white  terminals  for  100  to  120  volt 

models,

b.) 200 to 240 volts ac across the red and 

black terminals for 200 to 240 volt mod-

els

c.) 230 volts ac across the red and black 

terminals for 230 volt models.

(B) Check circuit breakers or fuses.

Refer to Service – safety overflow switch

for testing procedures. See page 11.