EBARA GSD Series, Translation Of The Original Instructions

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14
THE SYMBOL OF THE CROSSED-OUT
WHEELED BIN, PRESENT ON THE LABEL
PLACED ON THE APPLIANCE, INDICATES COM-
PLIANCE OF THIS PRODUCT WITH THE LEGIS-
LATION RELATING TO WASTE ELECTRICAL
AND ELECTRONIC EQUIPMENT. DISCARDING
INTO THE ENVIRONMENT OF THE EQUIPMENT
OR ABUSIVE DISPOSAL OF THE SAME ARE
PUNISHABLE BY LAW.
13. FAULT DIAGNOSIS
In the event of inadequate performance, not envisaged on the data
plate or in cases where problems arise during the start-up and use
of the machine, keep the following table in mind. This can be useful
in finding solutions in the event of malfunctions or operating errors:
PUMP
Symptoms Causes Measures to be taken
The pump
does not start
The electrical panel does not
work properly
Check all connections and the
power system
Motor fault See motor table
Anomalies in the power supply Check and repair
Friction on the axis of rotation Arrange for repair at a spe-
cialist workshop
Clogged pump and blocked
impeller
Remove foreign bodies. Free
the impeller
Priming does
not take
place
Foreign bodies in the base
valve
Remove foreign bodies
Base valve malfunction Replace the valve.
Water leaking from the suc-
tion pipe
Check the suction line
The air enters from the suction
line or from the seal
Check the duct and mechan-
ical seal
The pump
does not
deliver
The delivery valve is closed or
semi-closed
Open the valve
The suction height is too high
for the pump
Check the project
Poor range Incorrect direction of rotation Correct the electrical con-
nection
Low rotation speed Low voltage. Check the
power supply
Blockage at the base valve or
in the filter
Remove foreign bodies
Clogged pipe Remove foreign bodies
Presence of air inside Check and repair the suction
pipe and shaft seal
Presence of leaks in the de-
livery pipe
Check and repair
Impeller wear Check the impeller
Large pressure drops in the
system
Review the project
Very high liquid temperature.
The liquid is volatile
Review the project
Cavitation Consult the experts
Initially pro-
duces flow
but stops
immediately
The pump has not been primed Prime the pump correctly
Air inside Check and repair the suction
pipe and shaft seal
Presence of air bubbles in the
suction ducts
Vent the ducts
The suction height is too high
for the pump
Review the project
Current over-
load
The voltage is low or the phase
imbalance is large
Check the power supply
The flow rate is too low or the
head is too high
Partially close the delivery
valve
Pump for 50Hz is being used
at 60Hz
Check the plate data
Current over-
load
Presence of foreign bodies
inside the pump
Remove foreign bodies
The mechanical seal has not
been assembled correctly
Fit it correctly
PUMP
Symptoms Causes Measures to be taken
Damaged motor bearings Replace the bearings
Friction in the rotation zones.
The shaft is crooked
Have it repaired at a specialist
workshop
High density and/or viscosity
of the liquid
Review the project
Excessive
vibration and
operating
noise
Installation defect Check installation
Damaged motor bearings Replace the bearings
Flow rate too high Reduce the opening of the
intake valve
Flow rate too low Increase the opening of the
intake valve
Impeller locked Remove foreign bodies
Incorrect direction of rotation Check and correct the
connection
Rubbing in the rotation zones.
The shaft is bent
Have it repaired at a specialist
workshop
Cavitation Consult the experts
Vibrations in the pipes Replace the pipes or install
an inverter
Excessive
water leakage
from the shaft
seal
Mechanical seal assembly fault Fit it correctly
The mechanical seal is
damaged
Replace the mechanical seal
Delivery overpressure Review the project
The shaft is crooked Have it repaired at a specialist
workshop
MOTOR
Symptoms Causes Measures to be taken
It does not
rotate
The winding is broken or has
been cut
Have it repaired at a specialist
workshop
Shorted stator Have it repaired at a specialist
workshop
Earthing Have it repaired at a specialist
workshop
The bearings are jammed Repair the bearings
The voltage is low Change the rated voltage
Lack of phases in the power
supply
Check the power supply
Abnormal
noises or
excessive
vibrations
Operation without a phase Check the power supply
Power surges Correct the voltage fluctuations
Friction between rotor and
stator
Align and/or replace the bearing
Obstructions in the cool-
ing fan
Remove foreign bodies
Motor installation fault Connect the circuit correctly
Poor Star/Delta switching Correct the wiring
Motor over-
heated
Appearance
of smoke and/
or unpleasant
smell
High voltage fluctuations Correct the voltage fluctuations
Fan blocked Unblock the fan
Incorrect voltage Change the motor to another
with suitable voltage
The motor bearings are
jammed
Repair the bearings
Shorted stator Have it repaired at a specialist
workshop
Stator grounded Have it repaired at a specialist
workshop
Low rotation
speed
Low voltage Change the rated voltage
Poor Star/Delta switching Correct the wiring
Overload Reduce the current
Faulty electrical connection Correct the electrical connection
EN