Troubleshooting - Franklin Electric FWS Serie Betriebs- Und Wartungsanleitung

9. TROUBLESHOOTING

Faults
1. The electric pump
fails to start.
2. The overload relay or
internal thermic-
amperometric
protection (single
phase version only)
goes off during
operation.
Probable causes
1.1 The selector switch is set
to the OFF position.
1.2 The motor in not powered.
1.3 The automatic monitoring
devices (level switch, internal
thermic-amperometric
protection, etc.) are not enabling
operation.
2.1 All motor phases are not being
fully powered (threephase
version only).
2.2 Power demand is unbalanced
amongst the phases
(threephase version only).
2.3 The motor turns in the wrong
direction (threephase version
only).
2.4 Wrong overload relay setting.
2.5 The power supply voltage
rating fails to correspond with
that of the electric pump.
2.6 The electric pump fails to turn
freely since there are points that
rub.
2.7 Pumped fluid excessively
viscous and/or dense.
2.8 High temperature in the
electric panel.
2.9 Excessive electric motor
temperature.
2.10 Damaged motor windings
owing to the presence of liquid.
Remedies
1.1 Turn to the ON position.
1.2 Check that the electrical
equipment is in a good condition.
Check whether the equipment
is receiving power.
1.3 Wait until the correct operative
conditions have been restored or
check the efficiency of the
automatic devices.
2.1 Check the condition of the
electrical equipment. Check the
power supply voltage rating.
2.2 Check the unbalance.
If necessary, send the pump to
an authorized after sales
service center.
2.3 Invert two of the three phases.
2.4 Compare the setting amperage
value with the one on the
pump data plate.
2.5 Change the pump or change
the power supply.
2.6 Check the hydraulics. Immerse
the pump in lukewarm water if
it is blocked by ice. If necessary,
send the pump to an authorized
after-sales service center.
2.7 Check whether the right electric
pump has been chosen.
2.8 Protect the electric control
panel from the sun and heat.
2.9 Remove the incrustations from
the cooling surfaces of the motor.
Check whether the right
pump has been chosen since:
-the temperature of the fluid
may be excessive;
-the liquid may be at a
persistently low level and fail to
cover the motor.
2.10 Check the condition of the
motor windings. If necessary,
send the electric pump to an
authorized after-sales service
center.
GB
19