Wega Mininova, Instructions Manual

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English
91
espresso coffee machine - technician instructions
Indication
Cause Solution
for EVD :
THE LEDs OF
THE PUSH BUTTON
PANELS FLASH
for EPU :
THE FRONT LED FLASHS
After a few minutes, automatic filling with water is stopped:
1) Time control device has cut in
2) No water in mains.
3) Some of the tubes in the circuit are clogged
4) The probe and/or the earth are disconnected
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
SHUTDOWN OF
THE ELECTRONIC
SYSTEM
1) The volumetric dosing device has a contact between
the positive pole and earth 1) Check the connection of the volumetric
dosing device
THE PUMP
LEAKS WATER
1) Poor mechanical seal of the shaft
or the O-ring seal
2) The inlet and outlet connections are loose
3) The hex nut of the pressure relief valve
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) 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
THE MOTOR STOPS
SUDDENLY OR
THE THERMAL
PROTECTOR
INTERVENES DUE
TO OVERLOAD
1) Lime scale and mineral build-ups in the pump
have caused it to jam
2) The pump and the motor are not aligned (motopump version)
3) The motor is defective (motopump version)
4) The motor is connected with a incorrect voltage
(motopump version)
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
THE PUMP FUNCTIONS
BELOW NOMINAL
CAPACITY
1) The inlet is clogged, perhaps only partially
2) The pump rotates in the wrong direction (motopump version)
3) The pressure relief valve is not properly calibrated
4) The motor runs at a low (motopump version)
5) The inside of the pump is damaged due to the infiltration
of foreign matter
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
THE PUMP IS NOISY
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
(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) 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
THE CUP IS DIRTY WITH
SPLASHED COFFEE
1) Steam pockets in the delivery system
2) Air pockets in the hydraulic circuit
3) The flow reducer of the group is unsuitable 1) Reduce the water temperature
2) Check the cause and eliminate the problem
3) Replace the flow reducer