Electrolux EDW 1000, Service Manual, Page: 12 / 35

TSE-P 02.01 LF 12/35 599 34 60-32
4 OPERATION OF THE WASH / DRAIN MOTOR
4.1 WASH MOTOR
CHARACTERISTICS
This dishwasher is fitted with a single-phase variable-speed asynchronous motor.
A tachimetric sensor, fitted to the interior of the motor, constantly monitors the speed of the motor,
which is transmitted to the electronic control system.
MEASURING THE SPEED OF THE MOTOR
The operation of the motor during the washing cycle is controlled by the electronic control system,
which operates the motor at different speeds (fixed or variable).
The signal sent by the tachimetric sensor to the electronic control system (microprocessor) detects
the speed of the motor; the microprocessor performs a series of calculations and switches on the
Triac which generates the appropriate speed.
The following motor speeds are used during the washing cycle:
Fixed speed Variable speed
1600rpm
1600 = 2800rpm
2300rpm
2800rpm
TECHNICAL CHARACTERISTICS:
-
Power supply: 220/230V, 50Hz
- Speed: 2800 rpm
- Power absorption: 168 W
- Capacitor: 4µF
- Direction of rotation: Anti-clockwise
- Head 200 cm
4.2 WASH / DRAIN FUNCTION
The WASH and DRAIN functions are controlled by the electronic control board, which powers the two
motors alternately by means of a switching relay fitted to the control board.
The motor's electrical circuit is controlled by:
The triac ( TY1 ), which powers the two windings and
determines the speed of rotation of the motor.
Relay R1 , which switches the power from one motor
winding to the other.
The switching procedure is as follows:
WASH motor: relay not powered
DRAIN motor relay powered