Simonelli MUSICA, Service Manual

Page: 53 / 100

2 With a multimeter measure the voltage alter-
nating between the ends of the faulty dis-
penser (see figure). Place the test leads of
the voltmeter at the terminals of the doser
using the references in the image.
The signal generated by the fan is a square wave
of about 5 V.
In case of damage, the voltage value will be 0 V.
HOw TO CHECK THE FLOwMETER
To measure the signal, it is necessary to access
the electronic board located on the right side.
1 Remove the right, side panel.
HOw TO REMOVE THE FLOwMETER
Access the machine rear side to inspect the
flowmeter.
1 Remove the rear panel and the water tank.
2 Disconnect the Teflon pipes and electrical
connections.
3 Slightly tilt the machine to the right side
(front view) and remove the flowmeter by
pushing from the bottom up.
4 Open the flowmeter by rotating the upper
part and the lower one in reverse direction.
Check for the presence of limescale in the
flowmeter and verify the conditions of coil
(bottom part) and magnets (upper part). If
necessary, replace the flowmeter.
5 To re-assemble the flowmeter, refer to arrows
printed on the part:
• IN: bottom part, water inlet from the
tank/waterline.
•
OUT: upper part, water outlet towards
the pump.
Fig . 89
Fig . 90
Fig . 91
Fig . 92
NOTE
It is advisable to use an absorbent cloth when
tilting the machine to prevent any water leak
-
age .
Ed. 01 of 12/2015
6.7
Service Manual