Netafim AlphaDisc Series Quick Manual page 30

NON-STOP BACKWASH
SYMPTOM
HIGH DP REMAINS AFTER A BACKWASH
CYCLE
DP IS NORMAL BUT THE FILTER IS STILL
BACKWASHING NONSTOP
IN CASE ALL THE ABOVE DO NOT APPLY, CONSULT YOUR LOCAL DISTRIBUTOR.
| AlphaDisc Filters quick user guide V1.0
POSSIBLE CAUSES
HIGH FLOW RATE EXCEEDS PLANNED
IRRIGATION
THE FLUSHING PRESSURE IS BELOW THE
REQUIRED MINIMUM.
INSUFFICIENT CLEANING OF THE DISCS.
INCORRECT FLUSHING PROGRAM.
THE BACKWASH VALVES FAILED TO COM-
PLETE A REVERSE FLOW, FROM FILTERING
TO FLUSHING MODE.
THE HIGH / LOW PRESSURE SENSOR
FAILED TO READ THE ACTUAL PRESSURE.
REQUIRED ACTIONS
CHECK THE IRRIGATION FLOW RATE.
CHECK THE INLET / OUTLET AND DP
PRESSURE DURING FILTRATION MODE.
CHECK THE DOWNSTREAM PRESSURE
DURING BACKWASH MODE. INSTALL P.S.V.
IF NEEDED.
CLOSE THE INLET VALVE. REMOVE THE
DISCS ELEMENT, AND MANUALLY CLEAN
THE DISCS BY USING PRESSURIZED WA-
TER JETS.
CHECK AND SET THE RECOMMENDED
FLUSHING PROGRAM.
CHECK THE BACKWASH VALVES PERFOR-
MANCE. REPAIR OR REPLACE THE VALVE'S
ACTUATOR.
CHECK THE PRESSURE SENSORS AND
THE CONTROLLER. REPLACE IF NEEDED.
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