Drive Mxt 40 - Miele W 4840 Descriptive Technical Documentation
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Also See for W 4840:
- Operating and installation instructions (60 pages) ,
- Technical information (90 pages)
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DTD no. 11-4800
A Fit the toothed V-belt onto the pulley with the aid of a mounting lever, M. no.
05057690.
4.3
Drive MXT 40
A Check drum and drive for free movement. If the drive is blocked, remove the
toothed V-belt and check the drum and drive motor for free movement.
A Check the motor winding temperature limiter (Klixon): Pull the plug off the
motor. Check the motor winding temperature limiter (Klixon) for continuity,
open circuit and short circuit.
A Check the motor winding: Measure the electrical resistance of the motor
windings. The target value for the resistance of the motor windings, measured
between the plugs, at a room temperature of 68°F (20 °C): 7
higher temperatures the resistance can increase by 150 %). Permissible
difference between single measurements: < 0.5 . Target value of
measurement of windings to motor chassis/ground:
A Check for ground: Check motor chassis: Measure the electrical resistance
between the plug ground pin and the motor chassis. Target value for the
ground connection: Continuity.
A Motor wiring harness defective: Check the motor wiring harness and motor
plug visually for damage, check the wiring harness cables for continuity, open
circuit and short circuit. If a fault occurs sporadically, move the wiring harness
during the measurement.
A Check the speed sensor (Tachogenerator):
Danger!
Risk of electric shock when working on low-voltage components.
In the power electronic (ELP), there is no galvanic isolation from the power
supply.
When working on a washer connected to the power supply, be aware of the risk
of mains potential on low-voltage components.
Note
The wiring diagram shows the pin allocation of the motor plug.
Target values given apply to measurements at a room temperature of 68°F
(20°C).
A Turn the motor/drum vigorously and measure the voltage at the
tachogenerator. Target value for the alternating voltage at the tachogenerator:
Approx. 1-3 V. Check the tachogenerator for short circuit against the motor
chassis. Check that the magnet is fastened to the motor shaft.
22.12.2006, US_am
Descriptive Technical Documentation
This information should not be duplicated or passed on without Miele approval. All rights reserved.
060-7
± 1
(at
(Isolation).
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