BUNN Espress™
TROUBLESHOOTING
Model ES•1A™
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
•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.
•All electronic components have 120 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.
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
Equipment will not operate
Brew cycle will not start
Pushing any of the automatic batch buttons results in only a short flash of the brew light. Will not brew. Continu- ous brew works as well as automatic refill.
Probable cause
No power or incorrect voltage
Toggle switch (Master on/off)
No water
Water strainer or water conditioner
Dose sizes were set with a defective flowme- ter. The result was no flow pulses reached the electronic controller. during the dose size programming.
Remedy
Connect the brewer to the power source. Check for proper voltages. Check circuit breaker/fuse.
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 of the water conditioner and check for obstructions. Clear or replace.
Replace flowmeter. Repair loose connector in wiring between flowmeter and electronic controller.
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