OptiMeOptiMe
2021/01 Rev. 0.4
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E25
FLOW METER
ERROR
Attention; Flow meter
error does not always
mean that the flow
meter is defect.
When the software
starts the espresso pump
the flow meter must
produce impulses.
Why the flow meter
impulses are not made
or do not arrive must be
investigated.
Pump still does not work despite
hearing the relay clicking and the
pump gets power
Try to shock the pump by tapping it with
the back of a screwdriver.
No result Replace the pump.
The pomp coil is defect.
Resistance pump coil is approx. 102
Ohm
The diode is defect
The pump connector contains a build-in
diode. Type 1N5408 1000V / 3A
which may not be removed.
Attention; the pump may not
operate without diode!
gl/gr
P
1004596
1007013
rs zw bl
blbr
KW2
gl/gr
gl/gr
RELAY
ESPRESSO
PUMP
KW1
KW2
KW3
DV1
DV2
DV3
DV4
DV5
DV6
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
DOSING VALVESVALVES
INLET
OUTPUTS
J4
L
N
PE
rd
Diode
1N5408
1000V 3A
ESPRESSO
PUMP
13 4
The water- and coffee ways in the
brewer is blocked by dirt.
Clean the brewer inlet (douche) and
outlet (micro filter) for dirt and/or
obstructions.
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