TROUBLESHOOTING

BUNN Espress™

TROUBLESHOOTING

ES•2A™/ES•2SA™

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 at 1-800-637-8606.

Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

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 brewer is heated at all times unless disconnected from the power source. Keep away from combustibles.

WARNINGS

Exercise extreme caution when servicing electrical equipment.

Disconnect the brewer from the power source when servicing, except when specified.

Follow recommended service procedures.

Replace all protective shields and safety notices.

Problem

Probable cause

Equipment will not

No power or incorrect

operate

voltage

Remedy

Connect the brewer to the power source. Check the contactor terminals for proper voltages. Check circuit breaker/fuse.

Contactor

When on/off toggle (master) is

 

turned on , pilot lamp on base

 

should light up and the contactor

 

should energize and pull in. If

 

contactor does not pull in, unplug

 

brewer and check coil for continuity.

 

If open, replace contactor.

 

Toggle switch (Master

 

on/off)

Brew cycle will not start

No water

 

Water strainer or filter

Start switch

Must be in the on position. Pilot lamp will light.

Check plumbing and shut off valves.

Direction of flow arrows must be pointing toward the brewer.

Remove the strainer and/or filter cartridge and check for obstructions. Clear or replace.

Disconnect power supply and check terminals of switch for continuity (semi-automatic version)

Solenoid valve

Check voltage at terminals. If

 

voltage is present when the start

 

switch is pressed, disconnect power

 

supply and check coil terminal for

 

continuity. If there is continuity,

 

solenoid is defective. Replace

 

solenoid.

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Bunn service manual Troubleshooting, BUNN Espress, ES2A/ES2SA, Warnings, Problem, Probable cause, Remedy