Electrolux EWM0931 Series Service Manual page 47

1) Check the connection blocks (wiring) and
for the presence of any protruding/kinked
terminals.
2) Check for the presence of any marks /
residue / water or detergent deposits on the
motor and where these come from.
3) Then check for any windings / earthed
parts or parts with poor earthing
insulation. Use a tester with a
minimum capacity of 40 MΩ: between
each individual terminal and the motor
casing, read ∞ (fig. 10)
4) Then check each individual winding
according to the following table
(fig. 11).
MOTOR TERMINAL
BLOCK
A 6-7
B 2-5
C 3-4
D 1-5
The tolerance for the resistance values for the windings is ±7%
Note: when checking the rotor winding, the measurement must be made along the entire profile, turning the
shaft very slowly and checking for the presence of any short circuits between visible blades. Also check the
condition of the brushes.
2010 SOI/DT-mdm FCPD-dp Quality-tb
Guide to diagnostics for electronic controls EWM0931x
How to check collector motors
CONTROLS:
Generator
tachimeter winding
Stator winding
(all fields)
Rotor winding
(plus heat protector)
Stator winding (half-
field presence terminal
1)
Fig. 10
P = motor protector
R = rotor S = stator
T = tachometric generator
NMSC
184 Ω
1.1-2,2 Ω 1.62-2.12 Ω
1.6-1.8 Ω
0.55-0.56 Ω
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MOTORS
AP&C ECM
68.7 Ω 91Ω
1.46-1.95 Ω
1.9-2.42 Ω 2-2.3 Ω
0.67 Ω 0.68 Ω
Fig. 11
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