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BUNN Espress™ Model ES•1A™
8
Warning alarm (visual only, not audible) on flow counter
This alarm goes off when impulses from the flow meter are not registered by the central control unit, or
when a period in excess of five seconds lapses between impulses from the flow meter . If the brewer is running
(i.e. pilot lamp on continually), brewer function will stop and the lamp will begin to flash. Begin trouble shooting
by checking the following:
• Excessively fine grind of the coffee or excessive tamping.
• Any possible obstruction in the coffee outlet (dirty shower unit, blocked set injector, etc.).
• Electrical connections on the volumetric counter.
• Electric valve (group solenoid.
• Electrical connection on the electric valve.
• Possible breakdown in the electric pump.
In order to eliminate the alarm signal simply press any of the buttons; however, if the problem persists,
the alarm will reappear every time a programmed dose button is pressed. This alarm does not effect the
machine’s functioning in the continuous liquid drawing mode or automatic refill.
Warning alarm (visual only, not audible) on automatic refill
This alarm goes off when the water entering the boiler does not reach its required level within a
predetermined period of time. The time limit control prevents any over-filling from taking place. Once the
alarm goes off, all automatic batch buttons a well as auto matic refill will not function. If the alarm goes off,
check the following:
• Level probe.
• Connections of the level probe.
• Water entrance (possible blockage at input).
• Electric valve controlling the entrance of the water into the boiler.
This alarm does not impede the machine’s functioning in the continuous liquid drawing mode and is not
effected if the machine is disconnected from the water supply and reconnected.
NOTE: After the problem has been solved the alarm can be reset in the following way: move the
programming switch (14) to the programming position; simultaneously press the “one short” and
“two short” buttons. When the alarm has been eliminated, the switch should be turned back into
the “run” position.
The alarm will most likely go off when filling an empty or nearly empty boiler (such as in the event
of repairs or setting up a new machine), it may happen more than once.
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