©
DOSATRON INTERNATIONAL S.A.S /
35
©
DOSATRON INTERNATIONAL S.A.S /
36
US
SYMPTOM
CAUSE
SOLUTION
Injection
Under injection.
Suction of air.
1. Check the tightness of
the nuts in the injection
area.
2. Check suction tube.
3. For the IE (external
injection) versions, verify
the condition of the
external injection pipe
Dirty or worn check valve
seal.
Clean or replace it.
Max. flow exceeded (cavitation). Reduce flow.
Worn plunger seal.
Replace it.
Worn injection stem
Replace it.
For the IE models,
external injection module
and injection T scaled or
damaged.
Check the condition of the
umbrella valves, of the
membrane and of the non-
return valve. Descale or
replace them as necessary.
Leaks
Leaks in the
vicinity of the
fixing ring under
the body housing.
Injector sleeve seal is
damaged or positioned
incorrectly.
Replace it.
Leaks between
the setting sleeve
and the blocking
ring.
Injector stem seal damaged,
positioned incorrectly or
missing.
Replace it.
Leaks between
the body and
screw-top.
Screw-top seal is damaged,
positioned incorrectly or
missing.
Unscrew the screw-top, clean
the seal seating, replace or
change the seal. Position
correctly the screw-top.
SYMPTOM
CAUSE
SOLUTION
Leaks
Leak between the
injection module
and the doser body
(WL IE models)
Seal of the injection module
damaged, incorrectly
assembled or absent
Position it correctly, clean
the seal seat bearing or
replace it.
External leak
from the injection
module lateral nut.
Nut incorrectly tightened or
membrane damaged.
Clean the membrane,
replace it if necessary
and re-tighten the nut.
Leaks from the
injection T.
Internal seals damaged,
incorrectly assembled or
absent.
Replace.
THE MANUFACTURER
DECLINES ALL RESPONSIBILITY IF THE DOSATRON
IS USED IN CONDITIONS THAT DO NOT CORRESPOND
TO THE OPERATING INSTRUCTIONS AS INDICATED
IN THIS MANUAL
