Electrolux EWM09312 Service Manual page 45

E52: No signal from motor tachometric generator (first part)
E52
Cycle interrupted after 5 attempts during the cycle, immediately if recognised
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?
YES
The motor protector
probably tripped.
Before replacing
the motor, check:
► whether the water
circuit of the pressure
switch is ok (small
leaks from the tube
could cause the water
fills to 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.
Technical Support - A.D.L.
at the start of the cycle or during diagnostics.
Does the motor run
for a few moments
NO
then 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 40
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)-
YES
Detach the connector
from the motor and
measure between the
terminals and the motor
casing.
-(see Fig. 10)-
Is there any dispersion?
YES
Replace the motor and repeat the diagnostic cycle to check for any further alarms.
!
Check that all the connectors are correctly inserted
The motor never runs
NO
- see page 48 -
Detach the
connector from the
motor and measure
(Ω) the tachometric
generator coil,
NO
-(see Fig. 11)-
Is the value
correct?
(as on page 40
Point 4 - phase "A").
YES
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) -
YES
Replace the main circuit board and repeat the
diagnostic cycle to check for any further
Check/replace the wiring and repeat the
diagnostic cycle to check for any further
NO
If there are burns on the circuit board,
!
45/70
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
diagnostic cycle
NO
to check for any
further alarms.
alarms.
alarms.
see page 68
599 74 23-12 Rev.00