ProMinent Sigma 3 Basic Operating Instructions Manual page 64

Troubleshooting
Fault description
The drive motor is very hot.
All other faults.
64
Cause
The discharge line is seri‐
ously constricted.
Other causes.
* If necessary use the cross-section drawing of the integral relief valve in
the "Functional Description" chapter.
WARNING!
Warning of eye injuries
When opening the relief valve, a spring under high ten‐
sion can jump out.
–
**
WARNING!
Warning of escaping feed chemical
When dosing combustible feed chemicals or in areas at
risk from explosion, under no circumstances must the
second diaphragm also rupture.
–
CAUTION!
Warning of inaccurate dosing
Once the operating membrane has ruptured, precise
dosing of the pump can no longer be guaranteed.
–
–
Only with "Physiologically safe" design:
WARNING!
Following a diaphragm rupture, the pump loses its FDA
certification until the diaphragm has been replaced.
Remedy
Rectify any constriction of the dis‐
charge line.
Call ProMinent Service.
®
Wear protective glasses.
If the pump diaphragm rupture sensor triggers, stop
the pump immediately and only operate once a new
multi-layer safety diaphragm has been fitted.
Do not continue to use the pump for critical process
dosing.
For uncritical processes, the pump can continue to
be operated for some time after the break in emer‐
gency service mode at full operating pressure and
free from leaks up until replacement of the dia‐
phragm.
Personnel
Technical per‐
sonnel