Bunn JDF-4S User Manual download pdf (Page 19)

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 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.

WARNING – • Exercise extreme caution when servicing electrical equipment.

• Unplug the dispenser when servicing, except when electrical tests are speciﬁed.

• Follow recommended service procedures.

• Replace all protective shields or safety notices.

Cold Water Circulation

Dispense stations not working.

Note: Cooling failure or excessive

cabinet temperatures for more

than 4 hours will result in dispense

lockout or no dispense.

Note: Reset fault/timer by unplug-

ging unit.

1. Cabinet cooling fan.

2. Bath recirculation pump.

3. Restricted water ﬂow to cabinet

water coil and bath.

Replace fan (24vdc).

Note: Fan receives power when the

dispenser is powered.

A) If not running, check refrigera-

tion switch and wiring for proper

continuity.

B) Check for 120V or 230V AC at

pump. Replace pump.

Check for kinked hose.

PROBLEM

PROBABLE CAUSE

REMEDY

39992 042007

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Bunn JDF-4S User Manual Page 19

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