ProMinent EMFa, Operating Instructions Manual

Page: 53 / 76

9 Troubleshooting
User qualification: trained and qualified personnel / elec‐
trical technician
Ä
Chapter 2.2 ‘User qualification’ on page 13
9.1 Mechanical faults
Fault Cause Solution Remark
Noise developing from the
housing
Too great axial play of the
displacement body
Set the specific axial play. Check after tightening the
locking nut
Rotor hitting the housing Check the home position Note the home position at
“-3 mm”
Rotor is sluggish Different lubricants have
become resinated
Clean Check that any wear is
within the limits according to
the motor manufacturer
Other dirt Clean Check that any wear is
within the limits according to
the motor manufacturer
Bearing damage Replace worn slide ele‐
ments.
Refer to the motor manufac‐
turer’s information
Mechanical wear Replace worn slide ele‐
ments.
Refer to the motor manufac‐
turer’s information
Rotor is stuck The displacement body is
sticking in the socket
Carefully loosen the rotor. Check the displacement
body for traces of corrosion.
The transport protection is
in the transport position
Move the transport protec‐
tion to the operating posi‐
tion.
Secure the position with the
locking nut.
9.2 Hydraulic faults
Fault Cause Solution Remark
Pump does not meter Shut-off valve on the dis‐
charge or suction side is
closed
Check and, if necessary,
open the shut-off valves
Check for diaphragm rup‐
ture
Suction pressure too low Increase suction pressure,
remove dirt
Check for diaphragm rup‐
ture
Back pressure too high Lower back pressure,
remove dirt
Check the pressure relief
valve
Fitting position of the dis‐
charge valve and suction
valve is incorrect
Check and correct the fitting
position
Check for diaphragm rup‐
ture
Insufficiently bled hydraulic
system
Bleed the hydraulic system
Insufficiently bled delivery
chamber
Fill the delivery chamber
Feed chemical is solidified Heat up feed chemical suffi‐
ciently
Check for diaphragm rup‐
ture
Hydraulic oil level is too low Raise the hydraulic oil level
to a normal level
Possible impaired ignition
protection
Troubleshooting
53