Troubleshooting
Fault number
1
2
3
4
5
6
7
8
Cause
Remedy
–
–
–
–
–
–
–
–
Lubricant: excessive, insufficient or
unsuitable
Reduce, top up or replace the lubricant.
–
–
–
–
–
–
X
–
Connecting bolts not tightened properly
Tighten the connecting bolts.
–
–
–
–
–
–
X
–
Mechanical seal worn
Replace the mechanical seal.
–
–
–
–
–
–
X
–
Housing seal defective
Replace the housing seal.
–
–
–
–
–
–
X
–
Shaft sleeve is infiltrated
Replace the shaft sleeve and/or O-ring.
–
–
–
–
–
X
X
X
Pump distorted
Check the pipe connections and pump
attachment.
–
X
–
X
–
X
–
X
Motor running on 2 phases
Check the fuse and replace it if
necessary.
Check the cable connections and
insulation.
Tab. 12
Troubleshooting list
550 113 – 146-900/E
BA-2021.06 en-US
NI series
29