Xylem GLS GLV - Manual (Page 28)

en
28
triggered or the fuses blow. Thermal protector or fuses not suited to
the motor current.
Check the components and replace as
necessary.
Motor overload. Check the operating conditions of the
electric pump and reset the protection.
Wrong rotation direction. Check the direction of rotation and, if
necessary, exchange two phases in the
electrical panel if the pump is a three-
phase model, or check all the
connections if it is a single-phase model.
A phase in the power supply is missing. Check the power supply. The electric pump starts up but, after a
short period of time, the thermal
protector is triggered or the fuses blow.
Power supply voltage not within the
motor’s working limits.
Check the operating conditions of the
electric pump.
The electric panel is situated in an
excessively heated area or is exposed to
direct sunlight.
Protect the panel from heat sources and
from the sun.
There are foreign bodies (solid or fibrous
substances) inside the pump, the
impellers are jammed.
Extract the electric pump and clean it. The electric pump starts up but, after a
varying period of time, the thermal
protector is triggered.
The pump is overloaded because it is
sucking a dense and viscous liquid.
Check the actual power requirements
based on the characteristics of the
pumped liquid.
The temperature of the sucked liquid is
too high.
Check the operating conditions of the
electric pump.
Worn motor bearings Contact our Sales and Service
Department.
The electric pump starts up but does not
deliver the required flow.
Wrong rotation direction. Check the direction of rotation and, if
necessary, exchange two phases in the
electrical panel if the pump is a three-
phase model, or check all the
connections if it is a single-phase model.
Air in the pipes. Bleed the air.
Air in the pump. Bleed the air and check the liquid level
( section 3.1.6).
Piping and/or pump clogged. Disassemble and clean.
Valves locked in closed or partially
closed position.
Disassemble and clean, if necessary
replace the valve.
The electric pump starts up but it does
not stop.
Failure of start/stop device (float). Check the water level in the tank. If
everything is in order, check the device
and its connection cables.
The system’s general protection cuts in. Short circuit. Check electrical system.
The system’s differential thermal-
magnetic protection cuts in.
Ground leakage. Check insulation of the electrical system
components.
The pump rotates in the wrong direction
when it is stopped.
Leaks in check valve Repair or replace the components.
9. Disposal Information for installation and maintenance personnel
Observe the regulations and codes locally in force regarding sorted waste disposal.