dosatron D9 - Troubleshooting; Motor piston issues; Dosing issues

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Troubleshooting
SYMPTOM CAUSE SOLUTION
Motor piston
Your DOSATRON does
not start, or it stops
working.
Motor piston has
seized.
Restart the motor piston
by hand.
Presence of air in the
DOSATRON.
Bleed air out of the
system.
Overflow.
1. Reduce flow, restart.
2. Check that the motor
valve seals are fitted.
Motor piston is broken.
Return the DOSOTRON
to your distributor.
Dosing
Additive is not drawn
into the system.
The motor piston has
stopped working.
See Troubleshooting
Motor piston.
Air tightness problem in
the suction hose.
Check the suction hose
and that its nuts are
properly tightened.
For IE Models:
Blockage or lime scale
build-up in the external
injection hose.
De-scale or replace the
external injection hose
Suction hose obstructed
or strainer blocked.
Clean or replace them.
Suction valve seal worn,
incorrectly fitted or dirty.
Clean or replace it.
Plunger seal incorrectly
fitted, dirty or swollen.
Clean or replace it. Model
WL3000: replace the
entire plunger sub-
assembly (plunger +
seal).
Dosing pump body
scratched.
Replace it.