Stübbe ETL 20-100, Руководство по эксплуатации

Страница: 22 / 32

Troubleshooting
Fault number
1 2 3 4 5 6 7 8
Cause Remedy
X X
–
X
–
X
– –
Pump running in the wrong direction Check sense of rotation and correct if
necessary (
→ 5.5.2 Check direction of
rotation, Page 13).
X X
–
X
– – – –
Motor speed too low Compare the required motor speed with
the speci
fi cations on the pump type
plate. Replace the motor if necessary.
Increase the motor speed if speed
control is available.
–
X
–
X
–
X
– –
Pump parts worn Replace the worn pump parts.
– –
X X
–
X
–
X Pressure-side fi tting opened too wide Throttle down at the pressure-side fi tting.
Machine the impeller down. Consult the
manufacturer and adjust the impeller
diameter.
– –
X
– –
X
–
X Geodetic differential head, pipe fl ow
resistances and/or other resistances lower
than speci
fi ed
Throttle down the fl ow rate at the
pressure-side fi tting. Observe the
minimum fl ow rate.
Machine the impeller down. Consult the
manufacturer and adjust the impeller
diameter.
– –
X
–
X
– – –
Viscosity lower than expected
Machine the impeller down. Consult the
manufacturer and adjust the impeller
diameter.
– –
X
–
X X
–
X Motor speed too high Compare the required motor speed with
the speci
fi cations on the pump type
plate. Replace the motor if necessary.
Reduce the motor speed if speed control
is available.
– –
X
–
X X
–
X Impeller diameter too large
Throttle down the fl ow rate at the
pressure-side fi tting. Observe the
minimum fl ow rate.
Machine the impeller down. Consult the
manufacturer and adjust the impeller
diameter.
X X
–
X
–
X
– –
Impeller out of balance or blocked Clean the impeller.
–
X
–
X
–
X
– –
Hydraulic parts of the pump dirty, clotted or
encrusted Dismount the pump.
Clean the parts.
– – – – –
X
–
X Shaft bearing faulty Replace shaft bearing.
– – – – –
X
–
X Defective antifriction bearing in motor Replace the antifriction bearing
(
→ manufacturer's speci fi cations).
– – – – – –
X
–
Connecting bolts not correctly tightened Tighten the connecting bolts.
– – – – – –
X
–
Faulty housing seal Replace housing seal
– – – – –
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. 7 Troubleshooting list
22 ETL BA-2015.09.17 300 106