Wega Mininova Anweisungen Für Den Techniker Seite 93

Indication
for EVD :
THE LEDs OF
After a few minutes, automatic filling with water is stopped:
THE PUSH BUTTON
1) Time control device has cut in
PANELS FLASH
2) No water in mains.
3) Some of the tubes in the circuit are clogged
4) The probe and/or the earth are disconnected
for EPU :
THE FRONT LED FLASHS
SHUTDOWN OF
1) The volumetric dosing device has a contact between
THE ELECTRONIC
the positive pole and earth
SYSTEM
1) Poor mechanical seal of the shaft
or the O-ring seal
2) The inlet and outlet connections are loose
THE PUMP
3) The hex nut of the pressure relief valve
LEAKS WATER
or the filter is loose (motopump version)
4) The seal or O-ring of the pressure relief valve
or the filter is defective (motopump version)
THE MOTOR STOPS
1) Lime scale and mineral build-ups in the pump
SUDDENLY OR
have caused it to jam
THE THERMAL
2) The pump and the motor are not aligned (motopump version)
PROTECTOR
3) The motor is defective (motopump version)
4) The motor is connected with a incorrect voltage
INTERVENES DUE
(motopump version)
TO OVERLOAD
1) The inlet is clogged, perhaps only partially
2) The pump rotates in the wrong direction (motopump version)
THE PUMP FUNCTIONS
3) The pressure relief valve is not properly calibrated
BELOW NOMINAL
4) The motor runs at a low (motopump version)
CAPACITY
5) The inside of the pump is damaged due to the infiltration
of foreign matter
1) The pump and the motor are not aligned (motopump version)
2) The seal or O-ring of the pressure relief valve or the filter
is defective
3) The joint, the coupling screw or the V-shaped clamp is loose
THE PUMP IS NOISY
(motopump version)
4) The inlet is clogged, perhaps only partially
5) The hex nut of the pressure relief valve or the filter is loose
(motopump version)
1) Steam pockets in the delivery system
THE CUP IS DIRTY WITH
2) Air pockets in the hydraulic circuit
SPLASHED COFFEE
3) The flow reducer of the group is unsuitable
espresso coffee machine - technician instructions
Cause Solution
1) Turn the machine off and then back on
2) Open the water mains tap
3) Check and replace the defective tubes
4) Check and restore connections
1) Check the connection of the volumetric
dosing device
1) Check the status of the pump and take any corrective
action which may be required
2) Tighten the connections
3) Tighten the hex connection of the pressure relief valve
and the filter
4) Replace the seal and O-ring. Take care not to change
the calibration of the valve
1) Check the status of the pump and replace it,
if necessary
2) Install the pump-motor joint
3) Replace the motor
4) Ensure that the power supply voltage of the motor is correct
1) Clean the filter holder
2) Check the motor
3) Calibrate the pressure relief valve
4) Check the voltage or replace the motor
5) Replace the pump
1) Install the pump-motor joint
2) Replace the seal and O-ring. Take care not to change
the calibration of the valve
3) Align and tighten the components which are loose
4) Clean the filter holder
5) Tighten the hex connection of the pressure relief valve
and the filter
1) Reduce the water temperature
2) Check the cause and eliminate the problem
3) Replace the flow reducer
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English