Zanussi FA 1023 [31/39] Drain pump

2001.07 eb 31 599 34 84-67

6.13 DRAIN PUMP

6.13.1 General features

The pump whose function is to drain water at the end of the various

washing phases, is centrifugal and it is actioned by a synchronous

motor.

1. Impeller

2. Rotor

3. Stator

The rotor consists of a permanent magnet and the rotation direction can be either clockwise and anti-

clockwise.

The rotor can turn for a quarter of turn without making the impeller rotate. Therefore, if the impeller is

blocked by a foreign body, the rotor can make little movements clockwise and anti-clockwise till it looses.

The capacity of these pumps is about 25 l/min., the maximum head is 90 cm.

6.13.2 Electric symbol

6.13.3 Efficiency check

1. Check if the impeller is blocked by some foreign bodies

2. Check the winding resistance of the stator. It should measure about 150/200 Ω.

Warning!

The pumps are of a synchronous type, if they are disconnected from the hydraulic circuit, in some cases

they may not start since, as for their constructional features, they need an antagonist couple to be on the

impeller to enable the rotor to move towards the two directions.

Therefore the pumps should be tested only on the appliance, after filling some water.