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WATER FILL TIME-OUT - ALARM [A L 5]
This is a TIME-OUT, which is operative only during the water fill phases.
• The control system disconnects the water fill solenoid.
• The maximum time open for the fill solenoid is 4min for the entire fill phase. If this time limit is
exceeded, an alarm condition is generated.
• The count for the time starts at the moment the fill solenoid opens, and ends when the pressure
switch signal stabilises on "Full".
PRESSURE SWITCH SIGNALS EMPTY - ALARM [A L 5]
This control procedure is in operation only during the washing phases, i.e. after the water fill phase has
been completed.
• Once the pressure switch contact has closed in the "Full" (1-3) position, it must remain on "Full"
until the subsequent drain phase.
• If the pressure switch signals "Empty" (1-2), all the power loads are switched off, and the fill
solenoid is activated for a period equivalent to the period that the pressure switch contact is open.
• During the regeneration phase, the solenoid valve is not energised if the pressure switch resets on
"Empty".
• The maximum duration for which the pressure switch signals "Empty" during the washing phase is
90 seconds; if this period is exceeded, an alarm condition is generated.
WATER DRAIN TIME-OUT - ALARM [A L 6]
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.
• In all the final drain phases, and before passing to the subsequent fill phase, the pressure switch
contact must switch to "Empty". (1-2).
• If the contact is closed on "Full" (1-3), the drain phase is repeated
• At the end of the second drain phase, if the pressure switch contact remains closed on "Full" (1-3),
an alarm condition is generated.
WASHING MOTOR JAMMED ALARM [A L 7]
This control system is operative during the entire washing cycle.
• Jamming of the motor is detected by the tachimetric sensor; this also makes it possible to check for a
faulty tachimetric sensor using the following procedure:
• When the motor is switched on, it must reach a speed of 2000rpm within 5 seconds; if this does not
occur, an alarm condition is generated.
To check that the Tachimetric sensor functions correctly:
Check that the voltage across the terminals of the sensor is higher than 7 Volt AC.
MOTOR TRIAC SHORT-CIRCUITED - ALARM [A L 8]
This control system is operative during the entire washing cycle.
• The electronic control system checks whether the motor is correctly powered and detects the reason
for a malfunction.
• If the microprocessor identifies a signal from the tachimetric sensor indicating that the motor is in
operation when it should be switched off, an alarm condition is generated.
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