PROALL P Series, Service Manual, Page: 23 / 118

23

Check the admix strainer for build
‐
up that may be impeding
the flow of admixture.

Check for loose inlet connections or any indication of air in
admix output. Air will affect flow meter reading and be
difficult to control. Is the winter blow down valve
closed?

Ensure the admix system is primed sufficiently, and lines are
full.

As a final check if the system is in Admix Auto and
generating an alarm go to the Sensor Calibration and then
Flow Curves screens. In flow curves for the admix or
admixes with alarms press the Set Default button to
reset the flow curves. Try the admix in auto again. If it still
does not work, you can run the calibration and let the
computer generate the flow curve .
No admixture is flowing:

Is the admix pump turning? You can generally hear or touch
the motor to see if the pump is on.

Check the admix pump current in Electrical Diagnostics. Is
there current going to the pump? If the current draw is
greater than 10000mA then the pump may be locked up. If
your mixer has diaphragm pumps disregard.

To unlock the pump, loosen slightly the four Philips screws
If the pump leaks you have gone too far. See if the current
draw goes down and pump starts turning.

Be careful not to loosen the screws to far, you may lose the
O
‐
ring seal behind the cover plate.

Once you get flow moving through the lines tighten the
screws back up. Hand tight is all they need.

If the fluid is still not moving and the pump current draw is
greater than 10000mA then there may be a blocked or
sticking outlet check valve . Uncouple the quick connect
fitting and try to run the pump again. If current draw drops
and fluid starts to flow, then replace the check valve.

If the pump is turning and current draw is normal (typically
runs around 3000
‐
5000mA depending on chemical) then
the pump is still not primed properly.

Follow priming procedure to see if flow goes to tank when
valve is in full bypass (zero setting). Turn the valve back to
the wide
‐
open position and see if fluid is flowing to the
water line.
E
A
B
D
C
B
C
D
E