Repairs And Breakdown Interventions . Trouble Shooting - ETATRON D.S. HD-PH Instructions Pour L'emploi

clean water.
c. Feed the metering pump and keep it working for five to ten minutes.
d. Stop the pump, immerse the filter in dilute solution of hydrochloric acid and wait
for the acid to terminate its cleaning action.
e. Feed hydrochloric acid to the pump and keep it working for a further five
minutes, realizing a closed circuit with both the suction and the delivery hose
connected to the same tank.
f. Repeat the last operation with clean water.
g. Reconnect the metering pump to the plant.
11.0 R
EPAIRS AND BREAKDOWN INTERVENTIONS
Make sure that the pump is completely disconnected from the power supply
before undertaking any kind of repair, disconnect the pins from the mains or by
means of a onnipolar switch 3 mm minimum distance between the contacts.
(itel 6.0/b) Given the robust nature of the pump, mechanical breakdowns in the
true sense of the term are extremely unlikely. At times there may be liquid losses,
general due to the slackening of a hose clamp or, more simply, a leaking hose,
especially on the discharge side. More rarely, such losses may be due to membrane
failure or wear and tear of the sealing gasket of the membrane. When this is the
case, the defective parts have to be replaced after removing the four screws of the
pump body; when replacing these screws, make sure they are tightened in a uni-
form manner. Once the leak has been eliminated, the pump should be thoroughly
cleaned to remove all traces of the additive liquid; if this is not done, the stagnant
additive residues could exert an aggressive action on the pump case.
The pump performs its strokes but does not discharge additive into the system:
a. Dismantle both the suction and the discharge valve, clean them and then
reassemble them in their original positions. If the valves are found to be
swollen, make sure that the additive is chemically compatible with the type of
valve fitted in the pump (standard: viton valves).
b. Check the filter and make sure it is not clogged.
The pump does not start:
a. Check the connections to the power supply.
b. Check that the fuses are intact (only if external).
The pump does not measure correctly:
a. Check the calibration of the instrument.
b. Check the efficacy of the electrode.
The pump fails to dose:
a. Make sure the "set point" has been correctly set.
b. Make sure that the "ACID/ALK" or "RED/OXID" switch is in the right position,
i.e. that it concords with the required dosing.
N.B. When removing the pump from the plant, use great care in detaching the
delivery hose from the connector nipple, because it could well contain some
residual additive.
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ROUBLE
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SHOOTING