Bunn ES2C service manual Remedy, BUNN Espress, Troubleshooting, Problem

BUNN Espress ®

TROUBLESHOOTING

ES•2C™

PROBLEM	PROBABLE CAUSE
Will not brew when any of the	Flowmeter
batch buttons is pressed.
(Continuous brew works as
well as automatic refill.)	Solenoid valve

Pump

Water is not hot or long re- Solenoid valve covery time.

Limit thermostat(s)

Tank heater

REMEDY

Check connections between the flowmeter and electronic control unit. Replace flowmeter.

Check voltage at terminals. If voltage is present when the dose switch is pressed, disconnect power supply, remove wires from coil terminals and check coil ter- minal continuity. If there is continuity replace solenoid.

When start switch is pressed, pump should turn on immediately. If this does not happen, check voltage at ter- minal block on the pump. If correct voltage is present, use a flat-blade screwdriver to turn the motor shaft on the rear end of the motor to see if the pump is locked. If the shaft does not turn, replace pump assembly.

Remove the solenoid valve and clear it of any obstructions. Rebuild or replace the valve if necessary.

Disconnect power supply , remove all wires check across limit terminals for continuity. If no continuity, replace limit thermostat(s).

Check tank heater terminals for correct voltage. If voltage is present and ma- chine is not heating properly, replace tank heater.

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