Troubleshooting For Common Faults On The Bt Ma/Ad Series Pumps; Ordinary Maintenance - ETATRON D.S. BT MA/AD Notice D'installation, Emploi Et Entretien

8.0 – TROUBLESHOOTING FOR COMMON FAULTS ON THE BT MA/AD SERIES PUMPS
8.1 - MECHANICAL FAULTS
As the system is quite robust, normally there are no mechanical problems. Occasionally there might be a loss of liquid
from the nipple because the tube nut has become loose, or more simply the outlet piping has broken. It is rare to detect
losses due to a broken membrane or due to wear on the membrane seal gasket. I n t h i s r e m o t e c a s e , t h e
c o m p o n e n t s m u s t b e s u b s t i t u t e d b y r e m o v i n g t h e f o u r s c r e w s o n t h e p u m p b o d y (Fig. 10), when the screws
are reassembled tighten them equally to a maximum tightening torque of 180÷200 Nxcm. Once the liquid loss is
repaired, c l e a n t h e d o s i n g p u m p o f a n y a d d i t i v e r e s i d u e s w h i c h c o u l d a t t a c k t h e p u m p b o d y .
- THE DOSING PUMP PULSES BUT DOES NOT SEND ADDITIVE TO THE PLANT
a. Disassemble the suction and outlet valves, clean them and place them back to the same position (Fig. 10).
If the valves present swelling, c h e c k t h e t a b l e f o r c o m p a t i b i l i t y b e t w e e n t h e a d d i t i v e a n d t h e v a l v e s b e i n g
u s e d i n t h e p u m p (the standard valve is in Viton®; or another compatible elastomer, ball valves are an
optional).
b. Check for a clogged filter.
Warning: When removing the dosing pump from the plant take care when sliding out the piping
from the outlet fitting to avoid spilling any residual additive contained in the piping. Clean the
pump body if any additive comes into contact with the body
8.2 – ELECTRICAL FAULTS
NO LEDS ON, THE PUMP DOES NOT INJECT.
Check that the power supply is present (current plug and socket). If the pump remains inactive contact our technical
assistance centre.
9.0 – ORDINARY MAINTENANCE
Good ordinary maintenance and programmed checks guarantee over time good plant conservation and operation.
We therefore recommend to follow our advice for ordinary maintenance and to stipulate a programmed service and
assistance contract with one of our Technical Assistance Centres of your choice.
Check for good pump operation at least every 6 months.
If the dosing pump is used continuously, make more frequent checks.
Check the headers for deposits, in this case they can be removed and washed well in water. If the deposits are
difficult to remove with water, the parts can be washed with diluted hydrochloric acid (muriatic acid), obviously
avoiding that the acid enters the piping and finally rinse with water.
Check and substitute regularly the non-return valve with the VITON rubber valve-pusher, the membrane, header
'O'Ring, as these are the parts which suffer the most deterioration over time.
To substitute the membrane unscrew the 4 screws, unscrew the membrane, substitute the 'O'Ring and reassemble
all the parts back making sure to tighten the screws in an equal manner (alternatively in a crosswise direction and
respecting the tightening torque indicated in fig. 10).
Check and substitute regularly the injector rubber as it is subject to deterioration due to wear and as it also acts as
a seal it may cause a return of dosing product back to the pump.
26