Electrolux EWM 1000 AEG Service Manual page 12

Pressure switch
Control of the water level is performed by a three-level pressure switch which functions as follows:
Drum water filling
Water is filled into the drum by the following combination:
1. Filling up to fTR level
2. Filling up to fN level
3. Time-depending filling without control by pressure switch.
Supply valves are selected by 2 triacs, and the pressure switch switching levels are monitored by 2
control lines (sensing-wire).
Filling period is determined by control electronics.
Calculation of filling quantity is by measuring time interval between fTR contact closing and the closing of
pressure switch fN contact.
DGS-TDS-N 11.06 R.B. © Electrolux
fN
Level 1- sensing
AB-sensing
- 12 -
fTR fS
599 51 50 25 EN