Troubleshooting - Saci XV-F Serie Instrucciones De Instalación Y Funcionamiento

XV/XVI/XV-F SS Vertical Multi-stages Centrifugal Pumps
8. Maintenance
WARNING
Before starting maintenance work on the pump, the motor, or other parts of the system, make sure that the power supply has been
switched off.
The pump does not have a recommended scheduled maintenance schedule.
If the motor is fitted with grease nipples, then the motor should be lubricated with a high temperature lithium-based grease.
If not, then the motor does not require regular maintenance.
If the pump and motor are used infrequently with long intervals of non-operation, then we recommend that the motor be
greased.
Coupling adjustment: Refer to page 10 and 11.

9. Troubleshooting

Fault
a. Supply failure or no power supply.
b. Main contacts in motor starter are not making contact or the
motor coils are defective
c. Pump or auxiliary circuits protection fuses blown.
Pump does not run
d. Pump or piping system may be obstructed causing a jam.
when the motor
starter is activated.
e. Motor may have failed.
f. Motor protector or thermal relay has tripped out.
g. Tripping of anti-dry running protection.
a. Overload setting is too low.
b. The cable connection is loose or faulty.
c. One fuse is blown.
Starter overload trips
d. Pump is jammed by an obstruction
immediately when the
power is switched on. e. Contacts in overload are faulty.
f. The motor winding is defective.
g. Low voltage (Especially at peak time).
a. The voltage is not within the motor's operating limits.
The pump starts
but, after a short time,
b. The control panel is situated in an excessively heated area
the thermal protector
or is exposed to direct sunlight.
trips out or the fuses
blow.
c. A phase in the power supply is missing.
a. Worn motor bearings causing motor to overheat.
b. The pump's delivery rate is higher than the specified rate on
the pump nameplate.
The pump starts up
but, after a
period of time, the
c. There are obstructions inside the pump or pumping system. Disassemble and clean the pump and piping.
thermal protector
trips. d. Less viscous liquids may cause the motor to work too hard
and overload the motor, causing the motor to overheat.
a. Pump is not primed with liquid.
b. The pump, suction or discharge pipes are blocked by solids
in the liquid being pumped.
Pump runs but no c. The foot or check valve is blocked or has failed.
water delivered.
d. The suction pipe leaks.
e. The air is in the suction pipe or pump.
f. Motor operating in wrong direction (three-phase motor).
a. The pump draws in air or the inlet pressure is too low.
The pump capacity is
not constant. b. The pump or the suction side of the piping system partly
blocked by foreign bodies.
The system's general
Short circuit.
protection cuts in.
The pump rotates in
a. The foot or the check valve has failed.
the wrong direction
b. Leakage in the suction pipe.
when switched off.
Probable cause
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Check connections or restart the power supply.
Reconnect or replace contacts or magnetic coil.
Replace fuses.
Clean the obstruction and restart pump.
Replace the motor.
Reset the motor or thermal protector.
Check the water level in the tank or the water system
pressure. If everything is in order, check the protection
device and its connection cables.
Set the motor starter correctly.
Fasten or replace the cable connection.
Replace fuse and try starting again.
Check and clean obstruction from system.
Replace motor starter contacts.
Replace the motor.
Check the power supply.
Check the operating conditions of the pump.
Protect the control panel from heat sources and from the
sun.
Check the power supply.
Replace motor bearings.
Partially close the on-off valve located discharge side
until the delivery rate returns to within the specified limits.
Check the actual power requirements based on the
characteristics of the liquid being pumped, and replace
the motor accordingly.
Fill the pump with the liquid to be pumped.
Clean the pump, suction or discharge pipe.
Replace the foot or check valve.
Repair or replace the suction pipe.
Remove trapped air from system..
Change the direction of rotation of the motor
by reversing motor connections.
Improve the suction conditions.
Clean the pump or suction pipe.
Check electrical system.
Check and replace check valve.
Repair or replace the suction pipe.
Possible Solution