Electrolux EWM09312 Service Manual page 48

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) Proceed by checking 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) Proceed by checking each individual winding
according to the following table (Fig. 11).
MOTOR TERMINAL
BOARD TERMINALS
A
6 - 7
B
2 – 5
C
3 – 4
D
1 – 5
The tolerance of the resistance of 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.
Technical Support - A.D.L.
How to check collector motors
P = motor protector
R = rotor S = stator
T = tachometric generator
CHECK:
Tachometric generator winding
Stator winding
(Full field)
Rotor winding
(plus thermal cutout)
Stator winding
(half field)
Fig. 10
48/70
NMSC AP&C
184 Ω 68.7 Ω
1.1÷2.2 Ω 1.62÷2.12 Ω
1.6÷1.8 Ω 1.9÷2.42 Ω
0.55÷0.56 Ω 0.67 Ω
599 74 23-12 Rev.00
MOTORS
ECM
91 Ω
1.46÷1.95 Ω
2÷2.3 Ω
0.68 Ω
Fig. 11