Troubleshooting - Calpeda I-MPC Betriebsanleitung

14. 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) a) Unsuitable power supply
The motor b) Shaft blocked
does not start c) If the above causes have already
been checked, the motor may be
malfunctioning
2) a) Prolonged periods of inactivity
Pump with formation of rust inside the
blocked pump
b) Presence of solid bodies in the
pump impeller
c) Bearings siezed
3) a) Possible infiltration of air from
The pump suction tube connections, drain
works plugs or filling of pump or from
but no water the gaskets of the suction pipe
comes out b) Foot valve blocked or suction
pipe not fully immersed in liquid
c) Suction filter blocked
d) Water level under the skimmers
or other suction ports
6) a) Pipes and accessories with
Insufficient diameter too small causing
flow excessive loss of head
b) Presence of deposits or solid
bodies in the internal passages of
the impeller
c) Impeller deteriorated
d) Worn impeller and pump casing
e) Excessive viscosity of the liquid
pumped (if other than water)
f) Suction head excessive in relation
to the suction capacity of the
pump
g) Suction pipe too long
7) a) Rotating part unbalanced
Noise and b) Worn bearings
vibrations c) Pump and pipes not firmly
from the attached
pump d) Flow too strong for the diameter
of the delivery pipe
e) Operation in cavitation
f) Unbalanced power supply
8) a) The mechanical seal has
Leakage operated when dry or has stuck
from the b) Mechanical seal scored by
mechanical presence of abrasive parts in the
seal liquid pumped
c) Mechanical seal unsuitable for
the type of application
d) Slight initial drip during filling or
on first start-up
Changes reserved.
I-MPC Rev1 - Operating Instructions
POSSIBLE REMEDIES
a) Check that the mains frequency and voltage correspond to
the electrical characteristics shown on the plate
b) Remove the cause of blockage as indicated in the "Blocked
pump" instruction booklet
c) Repair or replace the motor by contacting an authorised
service centre
a) Unblock the pump by using a screw driver to turn the
relevant notch on the back of the shaft (remember to turn off
the electricity supply first ) or contact an authorised service
centre
b) If possible, dismantle the pump casing and remove any
solid foreign bodies inside the impeller, if necessary contact
an authorised service centre
c) If the bearings are damaged replace them or if necessary
contact an authorised service centre
a) Check which part is not tight and seal the connection
adequately
b) Clean or replace the bottom valve and use a suction pipe
suitable for the application
c) Clean the filter, if necessary, replace it . See point 2a) also.
d) Keep open only the gate valve of the pipe for suction from
the bottom.
a) Use pipes and accessories suitable for the specific
application
b) Clean the impeller and install a suction filter to prevent other
foreign bodies from entering
c) Replace the impeller, if necessary, contact an authorised
service centre
d) Replace the impeller and the pump casing
e) The pump is unsuitable
f) Try to close the delivery gate valve partially and/or reduce
the difference in level of the pump and the liquid being
sucked
g) Bring the pump closer to the suction tank so as to use a
shorter pipe. If necessary use a pipe of a wider diameter
a) Check that no solid bodies are obstructing the impeller
b) Replace the bearings
c) Anchor the delivery and suction piping as needed
d) Use bigger diameters or reduce the pump flow
e) Reduce the flow by adjusting the delivery gate valve and/
or using pipes with a bigger internal diameter. See point 4g)
too
f) Check that the mains voltage is suitable
In cases a), b) and c), replace the seal, if necessary contact an
authorised service centre
a) Make sure that the pump casing (and the suction pipe if the
pump is not self-priming) are full of liquid and that all the air
has been expelled. See point 4e) too.
b) Install a suction filter and use a seal suitable for the
characteristics of the liquid being pumped.
c) Choose a seal with characteristics suitable for the specific
application
d) Wait for the seal to adjust to the rotation of the shaft. If
the problem persists, see points a), b) or c) or contact an
authorised service centre.
EN
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