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5.8.4
Circuit diagram
5.8.5
Checking for efficiency
1. Check the connector blocks (wiring) and check for any bent or detached terminals.
2. Check for traces / residue / deposits of water or detergent and identify their source.
3. Check for any windings / components connected to mass or inadequately earthed using a tester with a
minimum scale of 40mW across each terminal and the casing (correct reading is ∞).
4. Check the individual windings against the values shown in the table below:
( ) excluding the resistance of the brushes
Notes:
When checking the rotor winding, measurement should be effected around the entire surface, turning
-
the spindle very slowly and checking for any short-circuits between visible plates. Also check the carbon
brushes for wear.
If noise is generated (bearings-magnet-belt), detach the drive belt from the pulleys and locate the
-
source.
2005.11 dmm
P = Motor overload cut-out
R = Rotor
S = Stator
T = Tachometric generator
Terminals on
motor
connector
block
Tachometric generator
3 - 4
5 - 10
6 - 7
8 - 9
Components to be
checked
winding
Stator winding
(full range)
Overload cut-out
Rotor winding ( )
44/60
Motor
[ Ω]
184
1,23
0
1,72
599 37 38-46
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