E52: No Signal From Motor Tachometric Generator (First Part) - Electrolux EWM0931 Series Service Manual

E52: No signal from motor tachometric generator (first part)

E52
Cycle interrupted after 5 attempts during the cycle, immediately if recognised at the start of
Checks to perform:
Access phase 7
of the diagnostic cycle
(The drum rotates at
55 rpm clockwise 55
rpm anticlockwise
with pulse at 250
rpm). Is the motor
running correctly?
Y
E
S
The motor protector
probably tripped.
Before replacing
the motor, check:
► whether the water
circuit of the pressure
switch is ok (small
leaks from the hose
could cause the water
to fill more than
normal and the motor
could overheat).
► whether the
bearings are ok and
the drum rotates
without friction.
►that the supply
voltage is correct
(with low voltage,
which does not
however exceed the
threshold of alarm
EH3, the motor might
not start).
Repeat the diagnostic
cycle to check for any
further alarms.
2010 SOI/DT-mdm FCPD-dp Quality-tb
Guide to diagnostics for electronic controls EWM0931x
the cycle or during diagnostics.
Check that all the connectors are inserted correctly
Does the motor
run for a few
moments then
NO
stop?
Y
E
S
Measure between the
terminals of the wiring
connector
J11-6 and J11-7.
Are the values (Ω) of
the tachometric
generator correct?
(as on page 47
Point 4 - phase"A")
Y
E
S
Measure between the
same terminals of the
wiring connector
(J11-6 and J11-7)
and the appliance
body.
Is there any
dispersion?
-(see fig.6)-
Y
E
S
Detach the connector
from the motor and
measure between the
terminals and the motor
casing.
-(see fig. 10)-
Is there any dispersion?
Y
E
S
Replace the motor and repeat the diagnostic cycle to check for any further alarms.
The motor never runs
NO
- see page 50 -
Detach the
connector from the
motor and measure
(Ω) the tachometric
generator coil
NO
-(see fig. 11)-
Is the value
correct?
(as on page 47
Point 4 - phase"A").
Y
E
S
Check/replace the wiring and repeat the
diagnostic cycle to check for any further alarms.
Check the
positioning of the
tachometric
NO
generator.
Is it correct?
- (see fig. 12) -
Y
E
S
Replace the main PCB and repeat the diagnostic
cycle to check for any further alarms.
Check/replace the wiring and repeat the
NO
diagnostic cycle to check for any further alarms.
If there are burns on the circuit board,
44/67
E52
Replace the
motor or
tachometric
generator and
repeat the
NO
diagnostic cycle
to check for any
further alarms.
Replace the
motor/generator
and repeat the
NO
diagnostic cycle
to check for any
further alarms.
see page 65
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