Franklin Electric VR Series Operating And Installation page 11

Operating and installation manual
8 DISPOSAL
Devices marked with this symbol cannot be disposed of in household waste but
must be disposed of at appropriate waste drop-off centres. It is recommended to
contact the Waste Electrical and Electronic Equipment drop-off centres (WEEE) in
the area. If not disposed of properly, the product can have potential harmful effects
on the environment and on human health due to certain substances present within.
Illegal or incorrect disposal of the product is subject to serious administrative and/
or criminal penalties.
PROBLEM
9.1 The pump turns but does not deliver
9.2 The pump vibrates
9.3 The motor heats up abnormally
9.4 The pump does not deliver
sufficient pressure
9.5 The automatic circuit breaker trips
9.6 The flow is not regular
TROUBLESHOOTING TABLE:
CAUSE
a) The internal parts are obstructed by foreign bodies:
b) Suction pipe is blocked:
c) Air is entering the suction pipe:
d) The pump is unprimed:
e) The suction pressure is too low and generally accompanied by
cavitation noise:
f) Voltage is insufficient to power the motor:
a) Anchorage on a faulty base:
b) Foreign bodies obstructing the pump:
c) Obstruction in the pump rotation:
d) Faulty electrical connection:
a) Insufficient voltage:
b) Pump blocked by foreign bodies:
c) Ambient temperature higher than +40°C:
d) Connection error in the terminal board:
a) The motor is not rotating at normal speed (foreign bodies or faulty
power supply etc.):
b) The motor is faulty:
c) Pump is not filling properly:
d) The motor rotates in reverse (three-phase motor):
e) The discharge-priming cap is not fully screwed on:
f) Voltage is insufficient to power the motor:
a) Relay value too low:
b) Voltage is too low:
c) Interruption of a phase:
d) The relay is faulty:
a) The suction height is not being observed:
b) The suction piping has a diameter smaller than that of the pump:
c) The filter and the suction piping are partially blocked:
9 TROUBLESHOOTING
WARNING: Before any repairs to the electric pump, check that the power supply is disconnected
and that it cannot be accidently reconnected during maintenance operations.
WARNING: If the electric pump is used for hazardous liquids, inform the personnel who will carry
out the repair. In this case, clean the pump so as to guarantee the safety of the operator.
For problems and solutions, consult also table below: TROUBLESHOOTING TABLE
ACTION
Have the pump dismantled and cleaned.
Clean the pipe.
Check that the pipe is airtight right up to the pump and seal.
Re-prime it by filling the pump. Check that the base valve is air tight.
Excessive loss of head in suction or the suction height is excessive (check
the NPSH of the installed pump).
Check the voltage of the motor terminals and the correct diameter of
the connections.
Check and fully tighten the nuts on the bolts of the studs.
Have the pump disassembled and cleaned.
Check that the pump can rotate freely without any abnormal resistance.
Check the pump connections.
Check the voltage at the motor terminals. The voltage should
be ± 10% of the rated voltage (± 6% si 60 Hz).
Have the pump dismantled and cleaned.
The motor is designed to function at a maximum ambient temperature
of + 40°C.
Follow the instruction manual for the motor, check the instructions at point 5.4.2.
Have the pump dismantled and correct the problem.
Replace it.
Open the bleed valve of the pump and bleed until all air bubbles
disappear.
Invert the rotation direction by exchanging two phase wires on the motor
terminal board or the motor protection breaker.
Check it and tighten it
Check the voltage of the motor terminals and the correct diameter of
the connections.
Check the intensity with an ammeter or record the intensity value
indicated on the motor plate.
Check that the diameter of the conductors of the electrical cable is the
right one.
Check the electrical cable or fuse and replace, if necessary,.
Replace it.
Check the installation conditions and the recommendations contained in this
manual.
The suction piping should have the same diameter as the pump suction mouth.
Clean the suction duct.
ENGLISH
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