Allweiler AEB1E - Pump Troubleshooting List

Troubleshooting
Malfunction number
12 34
5
6
7
89
Cause
Remedy
–
X
–
XX
–––
Pumped liquid temperature too hig h:
pump is cavitating
Increase the pump inlet pressure.
Lower the temperature.
Consult the manufacturer.
–
X
–
XX
–––
Hydraulic parts of the pump dirty, clo tte d
or encrusted
Dismount the pump.
Clean the parts.
–
X
–
X
–––
X
Viscosity or specific gravity of the pumped
liquid outside the range spec ified for the
pump
Consult the manufacturer.
–
X
–
X
–
X
––
X
Suction pipe completely or partially
blocked.
Clean suction pipe and any strainers
and filters.
–– ––
X
–––
Pressure-side fitting not opened wi d e
enough
Open the pressure-side fitting.
–
X
–
XXX
––
Pump parts worn
Replace the worn pump parts.
––
X
–
X
––
X Motor speed too high
Compare the required motor speed
with the specifications on the pump
nameplate. Replace the motor if
necessary.
Reduce the motor speed if speed control
is available.
–– –
XX
––––
Speed too high with viscous liquid: pump
is cavitating
Reduce the motor speed if speed control
is available.
–– ––
X
––
X
–
Coupling o r p ulley not correctly aligned.
Align coupling or pulley exactly again.
–– ––
XX
–
X
Antifriction bearing defective
Replace the antifriction bearing.
–– –– –
X
–
X
Defectiveantifrictionbearinginmotor
Replace the antifriction bearing.
–––– ––
X
–
Tie bolts not tightened prop erly
Tigh ten the tie bolts.
–––– ––
X
–
Mechanical seal worn
Replace the mechanical seal.
–––– ––
X
–
Housing seal d efective
Replace the housing s eal.
–– ––
X X X X Pump distorted
Check the pipe connections and pump
attachment.
–– ––
X
–––
Coupling elements worn
Replace the coupling elements.
–
X
–
XX
––
X Motor runn ing on 2 phases
Check the fuse and replace it if
necessary.
Check the cable conne ctions and
insulation.
Tab. 10 Pump troubleshooting list
32 AE BA-2020.05 en-US 260371 – 176-982/0