![HNP Mikrosysteme mzr-2521 Operating Manual Download Page 58](http://html.mh-extra.com/html/hnp-mikrosysteme/mzr-2521/mzr-2521_operating-manual_2142038058.webp)
7 The startup/shutdown of a pump
Operating manual mzr-2521 and mzr-2921
52
Technical data subject to change without prior notice!
Last update: June 2019
7.5
Trouble shooting
If the pump does not start to operate or stops the operation abruptly, please
proceed as follows:
Try to liberate the micro annular gear pump:
−
by turning the potentiometer knob back and forth or by sending an analog
voltage signal
−
via the control software
−
by pressing with a syringe a suitable flushing liquid (see table 26 and table 27)
through the micro annular gear pump
−
by changing the operating direction of the pump.
If these measures turn out to be ineffective, please contact the service staff of
HNP Mikrosysteme (see chapter 16) and send the pump back to the manufacturer
for inspection.
Warning
You should under no condition try to dismantle the pump by yourself. This
may cause damage to the pump components and consequently annul your
warranty claims.
7.6
Return of the micro annular gear pump to the manufacturer
For the return of a micro annular gear pump and components that have already
been employed, please follow the instructions:
−
drain any remaining rests of the delivered liquid from the pump
−
flush the pump with an adapted solvent
−
remove the filter elements from integrated or loosely delivered filters
−
protect all openings against dust with the delivered protective plugs or screws
−
return the pump in its original packing
The service personnel which carries out the repair should be informed about the
condition of the used micro annular gear pump. This is done by means of the
"Declaration of media in contact with the micro annular gear pump and
components" (see chapter 19). This form may also be downloaded from the web
https://www.hnp-mikrosysteme.de/service/download-center.html
!
The "Declaration of media in contact with the micro annular gear pump and
components" must imperatively be filled in. The nature of liquid which entered
into contact with the micro annular gear pump and the components must be
specified.
In case of non-compliance, the sender will be liable for any resulting injure to
persons or any object damage.