aqua HC150 Serie Manuel De Service Et D'entretien page 35

HC150 / HC101
Solenoid driven dosing pump
2. Pull out the valve cartridge being careful not to remove or damage the O-rings.
3. Wash the valve cartridge under running water.
4. To wash the valve thoroughly, dis-assemble the valve cartridge, being careful not to lose the parts that it is
composed of.
5. Re-assemble the valve following the order of assembly indicted in the exploded view in figure 7.
6. Re-insert the cartridge into the pump head.
Changing sealing O-rings and the diaphragm
Proceed as follows:
1. Remove the small round cover from the pump head using a small utensil to lever it off.
2. Unscrew the 4 screws on the pump head with a Ø 4mm hex key.
3. Remove the pump head being very careful that it does not contain any liquid.
4. Remove the old 3143 O-ring with a screwdriver and insert the new one.
5. Unscrew the diaphragm by hand (if necessary use a pliers wrench), then screw on the new diaphragm after
having added a small amount of Loctite® 222 to the thread of the diaphragm.
6. Position the pump head and screw on the 4 screws by cross-tightening them for a perfect seal. To avoid
the screws from accidentally loosening we recommend using a drop of Loctite® 222 on the thread of each
screw.
4.5 Troubleshooting
Problem: the pump does not turn on and the LED stays off
Solution:
1. Make sure the connection to the electrical network has been set up correctly in accordance with the
information provided on the pump's identification plate.
2. Check the integrity of the fuse.
3. Change the electronic board.
Problem: the pump turns on but does not beat
Solution for all models in constant mode:
1. Make sure the knob is not at 0%.
2. Make sure the pump is not in temperature alarm or level alarm.
Solution for all PI models in proportional mode:
1. Make sure the connection between contactor and pump is set up correctly.
2. Make sure the contactor emits pulses.
3. Make sure the pump is in perfect running order, following the procedure below:
Select the interval scale 1...100

Set the regulating knob to max (fully rotate clockwise):

Disconnect the contactor connector from the pump (BNC - red)

Using pliers try to touch the centre of the BNC with the outer edge

The pump should emit a beat, if it does not do so, change the electronic board.

Solution for all mA models in proportional mode:
1. Make sure the connection between instrument and pump is set up correctly.
2. Using a digital multi-meter make sure the instrument is providing the correct current.
Problem: the pump is working correctly but does not inject liquid into the system
Solution:
1. Check the level of product in the tank.
2. Make sure the foot strainer is not clogged up.
3. Make sure that the injection valve is not clogged up.
4. Carry out a maintenance operation on the suction/delivery valves. If evident malformations arise make sure
that the material is compatible with the product being dosed by consulting the chemical compatibility table,
and then go ahead with changing it.
Problem: liquid leaking from the pump head
Solution:
1. Make sure the delivery tube is inserted well and that the ring nut is tight.
2. Check the O-rings on the fittings.
3. Dis-assemble the pump head and check whether the sealing O-ring of the membrane is intact.
ADSP9500090 Rev.2.5 09.09.2015
MAINTENANCE
ENGLISH
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