Section 4 – Peristaltic Dosing Pumps
24
To fit a new Pump Tube…
2
3
4
1
Turn the roller holder so
that the rollers are in a
horizontal line. Push the
left hand side
compression fitting into
its seat, round side
facing in. Begin turning
the roller holder
clockwise, so that the
roller holder acts as a
lever which pulls the
pump tube in as it turns.
After approximately 3/4
of a turn, the right hand
side compression fitting
can be pushed in, round
facing in.
The new pump tube has
now been fitted.
Replace the see-through
protector plate on the
front of the pump. This
is essential to protect
the rollers and tube from
dirt and moisture.
Re-fit the Input and
Output tubing to the
compression fittings.
See the procedure
detailed in section 2.4.
The power to the
easyCHEM
770
can
now be re-connected
and switched on.
4.3
PUMP Error Message
The easyCHEM 770 monitors the dosing pump current usage and will detect problems with the
pump before damage can occur. If excess current is detected the unit will beep and display
PUMP
in the status window for pH or ORP. No further dosing of the chemical will occur and steps should
be taken to eliminate the fault.
Turn the unit OFF and check the pump tubing for kinks and ensure that the output tube is not
obstructed. A worn / faulty gearbox and motor can cause high current usage and will require
replacement.
The error message will be reset by turning the unit off or by pressing the Tech Menu key. The fault
will re-occur the next time dosing is required if the cause has not been eliminated.
