SAER Elettropompe SDLV-TEX, Use And Maintenance Manual

Page: 10 / 32

10
FAILURES
CAUSES REMEDIES
The thermal cutout trips, the input is elevated
The tension is too high or too low.
The pump doesn’t work.
Excessive quantity of sand in the water. Contact the local Electric Public Company.
Disassemble and repair.
Reduce the delivery, using the delivery gate valve.
The tension is different in the three phases.
One cable is grounded.
The pump doesn’t work.
The connection of the motor is not correct. Check the equipment and the line.
Repair or replace the cable.
Disassemble and repair.
Check the connection.
The thermal cutout trips, the input is unbalanced
Wrong direction of rotation (only three-phase).
Leakages in the delivery pipe.
Worn out inner parts.
Air or gas in the water.
Invert the direction of rotation.
Replace the damaged pipe or the damaged seal.
Disassemble and overhaul.
Degas the liquid .
Head lower than the stated one
Obstructed impeller.
Worn out inner parts.
Insufficient delivery
The pump works with a too low head.
Level of the water next to the suction inlet.
Adjust the gate valve present in the delivery pipe.
Reduce the delivery.
Lower the installation height of the pump.
The operation of the unit is irregular
Worn out mechanical parts Disassemble and overhaul.
The unit vibrates
9. FAILURES, CAUSES AND REMEDIES
Disassemble and overhaul.
Disassemble and overhaul.
10. SPARE PARTS
Use only original spare parts.
To order spare parts, refer to the catalogues or contact the SAER Technical Assistance specifying the kind of
pump, the serial number and the year of manufacture (all these data are to be found in the identification plate).
- disconnect the pump motor from the electrical system;
- wait until the temperature of the liquid is such not to create a danger of burns;
- if the liquid handled by the pump is harmful for one’s health,it is indispensable to observe the following warnings:
-the operator must wear suitable individual protection devices (mask, goggles, gloves, etc.);
-the liquid must be carefully collected and disposed of with respect for current law;
-the pump must be washed inside and out, disposing of the residues as said above.
Verify the level of the oil of the chamber of the mechanical seals every 500 hours of operation or at least one
time per year. The check shall be executed by the special cap: put the pump horizontally on a safe surface (Fig.
6a). Unscrew the cap and rotate the pump till obtaining the coming out of the oil. Control the quantity and the
condition of the oil. In case everything is correct, fill again with the oil and then carefully screw the cap of the
chamber, in order to prevent the oil from escaping. If the quantity or the condition of the oil is not correct,
control the state of the mechanical seals and get in touch with the SAER Technical Assistance.
Use only oil type ESSO Marcol 82 or equivalents.
Do not throw the oil in the environment.In case extraordinary maintenance is required, get in touch with the
SAER Technical Assistance.
Do not modify the product without the necessary preventive authorization.
8. DECOMISSIONING AND DISPOSAL
At the end of the operating life of the pump/electropump or any of its parts, it must be disposed of in observance
of current regulations.
This is also valid for the liquid contents, with particular regard if classified toxic or harmful.
7. MAINTENANCE
In case maintenance is required, it shall be necessary to observe the following precautions: