EBARA EVMSN10, Руководство по эксплуатации и техническому обслуживанию

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17
EN
Hydraulics blocked
Check the hydraulic part. Remove the
foreign bodies, blocking the impeller.
Overload protection tripped or
not properly calibrated.
Check whether the calibration of the
amperometric protection has been properly
calibrated (maximum line current value of
the motor).
Undersized or damaged
capacitor (motor 1 ~).
Verify proper functioning of the capacitor. If
necessary, provide for a larger capacitor.
Motor burned down due to
insulation fault, overheating or
overload (unsuitable liquid).
Measure the insulation resistance of the
winding towards the grounding and make
sure it is greater than 10MΏ
Powered by 2 phases
(motor 3~) .
Check how many stages have been
connected in the terminal box of the motor
and check the actual presence of voltage
on the 3 stages using a voltmeter, during
pump operation.
the motor turns
Decrease in the line voltage Wait for voltage to return to normal
Suction filter / hole blocked Clean the filter / hole
Foot valve blocked (**)
Release or clean the valve and check that it
works properly
Pump has not been filled (**) Fill (sect. 10)
Water level low (if no
protection system is fitted) (**) Restore water level
Pump not primed
Prime the pump
Check any delivery non-return valves
Check the liquid level
Pressure too low Restrict the delivery gate
(*) If you encounter the same trouble again, call our Servicing Department
(**) Caution: mechanical seal could be damaged
14.2 THE PUMP WORKS
with a reduced flow rate
System undersized Reviewing the system
System dirty Clean the piping, valves, filters
Water level too low
Switch off the pump or immerse the foot
valve
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