Troubleshooting - Calpeda I series Betriebsanleitung

12. TROUBLESHOOTING

WARNING: Turn off the power supply before performing any operations.
Do not allow the pump or motor to run when dry even for a short period.
OFF
Strictly follow the user instructions and if necessary contact an authorised service centre.
PROBLEM PROBABLE CAUSES
1) 1a) Unsuitable power supply
The motor does 1b) Incorrect electrical connections
not start 1c) Engine overload protective device cuts
in.
1d) Blown or defective fuses
1e) Shaft blocked
1f) Motor failed
2) 2a) Prolonged periods of inactivity .
Pump blocked 2b) Presence of solid bodies in the gears
2c) Bearings or bearing sleeve siezed
3) 3a) Presence of air inside the pump or
The pump suction pipe
functions 3b) Possible infiltration of air.
but no liquid 3c) Foot valve blocked or suction pipe not
comes out fully immersed in liquid
3d) Suction filter blocked
4) 4a) Pipes and accessories with diameter
Insufficient flow too small
4b) Presence of deposits or solid bodies
in the impeller
4c) Rotor deteriorated
4d) Worn rotor and pump case
4e) Gases dissolved in the water
4f) Excessive
pumped
4g) Incorrect direction of rotation
5) 5a) Worn bearings or bearing sleeve
Noise and 5b) Unbalanced power supply
vibrations
from the pump
6) 6a) The pump has run dry
Leakage from 6b) Mechanical seal rings scratched by
the mechanical the presence of abrasive parts in the
seal rings pumped liquid
I-IR-IRR Rev9 - Operating Instructions
POSSIBLE REMEDIES
1a) Check that the mains frequency and voltage are suitable.
1b) Connect the power supply cable correctly. Check the setting of the
1c) Check the power supply and make sure that the pump shaft is turning
1d) Replace the fuses, check points a) and c)
1e) See "Blocked pump" instruction booklet
1f) Repair or replace the engine.
2a) Unblock the pump by using a screw driver to turn the relevant notch
2b) Remove any solid foreign bodies inside the gears
2c) Replace the bearings or bearing sleeve.
3a) Release the air from the pump using the delivery control valve.
3b) Check which part is not tight and seal the connection.
3c) Clean or replace the bottom valve and use a suitable suction pipe .
3d) Clean the filter, if necessary, replace it . See point 2b) also.
4a) Use pipes and accessories suitable for the specific application
4b) Clean the impeller and install a suction filter
4c) Replace the impeller
4d) Replace the impeller and the pump casing
4e) Perform the opening and closing manoeuvres through the feeder gate
4f) The pump is unsuitable
4g) Invert the electrical connections in the terminal board
viscosity of the liquid
5a) Replace the bearings or bearing sleeve
5b) Check that the mains voltage is right
In cases 6a), 6b), replace the mechanical seal rings
6a) Make sure that the pump casing are full of liquid and that all the air
6b) Install a suction filter.
thermal overload protection.
freely. Check the setting of the thermal overload protection.
on the back of the shaft.
has been expelled.
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