19
EN
Incorrect motor rotation
direction (only three-phase).
Reverse phases
Incorrect supply voltage
Supply the pump with the voltage indicated
on the ate
Leaks from piping
Check the joints
Pressure too high
Recheck the system
Incorrect priming / No priming
Correctly prime the suction pipe section
(check instructions on the manual)
Non-return valve blocked
Verify proper non-return valve functioning. If
necessary, replace.
Wear of the hydraulic part.
Check the status of the impeller (check
the compatibility of the material with the
pumped liquid)
Improper liquid
Check the density and viscosity of the
pumped liquid (contact sales department).
14.3 PUMP STOPS AFTER RUNNING FOR SHORT TIME
as a result of thermal overload protection tripping
Supply voltage outside motor’s
accepted range
Check whether there are excessive drops in
voltage due to undersized line or cables
Inadequate thermal calibration
Check whether the calibration of the
amperometric protection has been properly
calibrated (maximum line current value of
the motor)
Motor overload due to dense
and/or viscous liquid
- Reduce flow rate,
throttling the delivery line or replace motor
with more powerful one
- Check actual power
absorbed by the pump based on liquid
pumped
Pump delivers liquid at higher
rate than max. flow rate on
rating plate
Reduce flow rate by throttling delivery line
Panel exposed to sun or other
sources of heat
Protect panel from sun or
sources of heat.
Foreign matter brakes impeller
rotation
- Disassemble and
clean pump
- Call our nearest
Servicing Department to do the job
Worn motor bearings
Replace bearings.
Liquid temperature too high
The temperature exceeds the technical
limits of the pump
Internal fault
Contact the nearest retailer
for pressure applications
The difference between
maximum and minimum
pressure is minimal
Increase the difference between the two
pressures
14.4 THE PUMP DOES NOT STOP
Electrical / electronic
components faulty/not working. Contact our sales network.
Level sensors not working.
Verify proper operation of level sensors.
Non-compliant / unsuitable
use.
Contact our sales network.
for pressure applications
Maximum pressure too high
Set maximum pressure at a
lower value
14.5 THE PUMP VIBRATES
is too noisy during operation
Flow rate too high
Reduce the flow rate
Cavitation
Contact the nearest retailer
Irregular piping
Fix in a better way
Noisy bearing
Contact the nearest retailer
Foreign bodies sliding along
the motor fan
Remove the foreign bodies
Incorrect priming
Bleed the pump and/or fill it again
unusually noisy
Motor bearings worn
Replace bearings
Foreign matter between fixed
and rotating parts
- Disassemble and clean pump
- Call our nearest Servicing Department to
do the job
Pump operation
affected by cavitation
Reduce flow rate by throttling delivery line. If
cavitation persists, check:
- Suction height
- Pressure loss along suction line (diameter
of pipe, elbows etc.)
- Liquid temperature
- Delivery line backpressure
14.6 WHEN THE SWITCH CLOSES, THE PUMP DOES NOT MANAGE TO
COMPLETE EVEN ONE TURN OR STRUGGLES TO TURN THE ODD
HALF TURN BEFORE THE CIRCUIT BREAKER TRIPS OR FUSES
BLOW
Motor short-circuited
- Check and replace
- Call an electrician specialized
Short-circuit due to incorrect
connection
- Check and reconnect correctly
- Call an electrician specialized
14.7 RESIDUAL CURRENT CIRCUIT BREAKER TRIPS AS SOON AS
SWITCH CLOSES
Leakage current owing to
damaged insulation of motor,
cables or other electric
components
- Check and replace electric component with
ground fault
- Call an electrician specialized
- Condensate build-up in the motor
- Presence of foreign bodies
14.8 PUMP PERFORMS A FEW TURNS IN OPPOSITE DIRECTION WHEN
STOPPING
Foot valve leaking
Check, clean or replace
Suction pipe leaking
Check and repair
Summary of Contents for EVMS 1
Page 85: ...85 12 13 14 9 8 10 11 A EVMS 1 3 5 10 15 20 3 Nm...
Page 87: ...87 A EVMS 32 45 64 90 without ball bearing 9 10 11 12 13 14 15 5 Nm 2 min...
Page 88: ...88 A EVMS 32 45 64 90 with ball bearing 2 min 1 2 3 4 5 7 6 M8 20 Nm M12 40 Nm M16 70 Nm...
Page 91: ...91 E EVMS 1 3 5 10 15 20 4 kW 1 2 3 4 5 6 7 8 9 10 3 Nm M6 10 Nm 11 12...
Page 92: ...92 E EVMS 1 3 5 10 15 20 5 5 kW 1 2 3 4 5 6 7 8 9 10 11 12 3 Nm M8 18 Nm M10 50 Nm...
Page 97: ...97...
Page 98: ...98...
Page 99: ...99...