EBARA EVMS Manual De Instrucciones De Empleo Y Mantenimiento página 19

Incorrect motor rotation
Reverse phases
direction (only three-phase).
Supply the pump with the voltage indicated
Incorrect supply voltage
on the ate
Leaks from piping Check the joints
Pressure too high Recheck the system
Correctly prime the suction pipe section
Incorrect priming / No priming
(check instructions on the manual)
Verify proper non-return valve functioning. If
Non-return valve blocked
necessary, replace.
Check the status of the impeller (check
Wear of the hydraulic part. the compatibility of the material with the
pumped liquid)
Check the density and viscosity of the
Improper liquid
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 Check whether there are excessive drops in
accepted range voltage due to undersized line or cables
Check whether the calibration of the
amperometric protection has been properly
Inadequate thermal calibration
calibrated (maximum line current value of
the motor)
- Reduce flow rate,
throttling the delivery line or replace motor
Motor overload due to dense with more powerful one
and/or viscous liquid - Check actual power
absorbed by the pump based on liquid
pumped
Pump delivers liquid at higher
rate than max. flow rate on Reduce flow rate by throttling delivery line
rating plate
Panel exposed to sun or other Protect panel from sun or
sources of heat sources of heat.
- Disassemble and
Foreign matter brakes impeller clean pump
rotation - Call our nearest
Servicing Department to do the job
Worn motor bearings Replace bearings.
The temperature exceeds the technical
Liquid temperature too high
limits of the pump
Internal fault Contact the nearest retailer
for pressure applications
The difference between
Increase the difference between the two
maximum and minimum
pressures
pressure is minimal
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
Contact our sales network.
use.
for pressure applications
Set maximum pressure at a
Maximum pressure too high
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
Remove the foreign bodies
the motor fan
Incorrect priming Bleed the pump and/or fill it again
unusually noisy
Motor bearings worn Replace bearings
- Disassemble and clean pump
Foreign matter between fixed
- Call our nearest Servicing Department to
and rotating parts
do the job
Reduce flow rate by throttling delivery line. If
cavitation persists, check:
- Suction height
Pump operation
- Pressure loss along suction line (diameter
affected by cavitation
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
- Check and replace
Motor short-circuited
- Call an electrician specialized
- Check and reconnect correctly
Short-circuit due to incorrect
connection
- Call an electrician specialized
14.7 RESIDUAL CURRENT CIRCUIT BREAKER TRIPS AS SOON AS
SWITCH CLOSES
- Check and replace electric component with
Leakage current owing to
ground fault
damaged insulation of motor,
- Call an electrician specialized
cables or other electric
- Condensate build-up in the motor
components
- 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
EN
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