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6)
Power on the pump again having it washed with 10% hydrochloric acid for 5 minutes, implementing a closed circuit with suction
and supply tubes dipped in the same container;
7)
Repeat this operation with water;
8)
Reconnect the pump to the plant.
INTERVENTION ON ETWIN PUMPS IN CASE OF FAILURE
M e c h a n i c a l f a i l u r e s
Since the system is robust, actual mechanical failures do not occur. Liquid can at times leak from a loose fitting or tube clamping
ring nut, or simply if the pinch tube bursts. In that case these components must be replaced When the leak has been repaired, flush
any additive residues out which by stagnating could chemically attack the chassis and damage the inner circuit. If the dosing liquid is
missing, depending on the version:
FOR THE PERISTALTIC VERSION
1)
Check that the pumping tube and suction and supply tube are intact. If any swelling or wear is detected in the tubes, check the
chemical compatibility of the additive with that type of tube.
FOR THE ELECTROMAGNETIC VERSION
1)
Diaphragm worn, replace it;
2)
Burnt fuse on magnet, replace it (check the resistance of the magnet)
3)
Electromagnet burnt, replace it
FOR ALL VERSIONS
1)
Check the status of filter clogging.
2)
Check the status of the injection valve
E l e c t r i c a l f a u l t s
THE INSTRUMENT DOES NOT MEASURE CORRECTLY.
3)
Check calibration of the instrument
4)
Check that the electrode or probe works properly
THE PUMP DOES NOT DOSE (INSTRUMENT POWERED AND DISPLAY ON)
Check the"Setpoint".
Check that the timer function is set correctly
Check the ACID/ALKALINE, OXIDANT/REDUCING AGENT or DIRECT/INVERSE setting
WITH ADDITIVE MISSING, THE INSTRUMENT DOES NOT TRIGGER THE ALARM (for instruments supplied with level
probe)
Check the connection between the level probe and the terminal board, short circuiting the terminals (see WIRING chapter). If the
pump triggers an alarm, the probe must be replaced. Otherwise contact our Service Centres.
Attention: When removing the device from the system, carefully slip the tube off the supply fitting of the pumps, as any
residual additive inside the tube could escape. Thoroughly clean any chemical residue on the chassis of the device
