Electrolux EDW 1000 Service Manual page 23

7.4 DESCRIPTION OF SAFETY FEATURES AND ALARMS
7.4.1 WATER FILL TIME-OUT
This Time-out is activated only during the water fill phases.
Ä The control system definitively switches off the fill solenoid valve.
Ä Counting of time "T" starts when the solenoid valve opens and ends when the signal from the
pressure switch stabilizes on "full".
Ä The maximum time for aperture of the fill solenoid ("T") is 4 minutes for the entire fill phase; if this
time is exceeded, an alarm condition is generated.
Possible causes:
a. Water tap closed
b. Mains water pressure <0.3 bar
c. Intervention of Anti-overflow device
d. Fill solenoid or connections faulty
e. Sump - Pressure switch tube obstructed
f. Pressure switch faulty / loose connections
7.4.1.1 PRESSURE SWITCH SIGNALS "EMPTY" (1-2)
This control procedure is in operation only during the washing phases, i.e. after the water fill phase
has been completed.
Ä Once the pressure switch has closed in the "FULL" position (1-3), it must remain "FULL" until the
subsequent drain phase.
Ä If the pressure switch signal returns to "EMPTY" (1-2), the fill solenoid is activated for a period
equivalent to the period of aperture of the pressure switch.
Ä The maximum duration for which the pressure switch signals "EMPTY" (T) during the entire
phase is 60 seconds; if this period is exceeded, an alarm condition is generated.
Possible causes:
a. Dishes upside down
b. Central filter obstructed
c. Excessive foam
d. Leakage from Sump - Pressure switch tube
e. Pressure switch faulty / loose connections
7.4.2 WATER DRAIN TIME-OUT
This control procedure is operative in all the drain phases and checks the status of the pressure
switch in order to ensure that the cycle is performed correctly.
Ä In all the final drain phases, and before passing to the subsequent phase, the pressure switch
contact must be open on "EMPTY" (1-2).
Ä If the contact is closed on "FULL", the drain phase is repeated.
Ä At the end of the second drain phase, if the pressure switch contact remains closed on "FULL",
an alarm condition is generated.
Possible causes:
a. Domestic drain circuit not suitable (obstructed / blocked)
b. Drain pump faulty (foreign bodies)
c. Pressure switch on "FULL" (1-3)
d. Sump - pressure switch tube obstructed
f. Electrical connections loose/false
g. Control board (relay interrupted)
TSE-P 02.01 LF
ALARM [A L 5]
ALARM [A L 6]
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Led [LD9]
Led [LD10]
599 34 60-32