Protection And Control Functions; Built-In Protection; Thermal Switches; Servicing And Maintaining The Product - Grundfos SEG AUTOADAPT Installation And Operating Instructions Manual

7. Protection and control functions

7.1 Built-in protection

The motor incorporates an electronic unit which
protects the motor in various situations.
In case of overload, the built-in overload protection
stops the pump for 5 minutes. After that period, the
pump is ready to restart if the starting conditions are
fulfilled.
To reset the pump, switch off the power supply for
one minute, and switch it on again.
The motor is protected in the following situations:
• dry running
• voltage surges up to 6000 V
In areas with high lightning intensity, external
lightning protection is required.
• overvoltage
• undervoltage
• overload
• overtemperature

7.2 Thermal switches

All pumps have two sets of thermal switches in the
stator windings.
When a thermal switch is activated, the pump will
stop immediately, and it will not restart until the
motor windings have cooled sufficiently.
If the pump does not restart automatically, reset and
restart the pump manually. If the pump has to be
restarted manually repeatedly, contact Grundfos or a
service workshop authorised by Grundfos.
8. Servicing and maintaining the
product

8.1 Safety instruction and requirements

DANGER
Electric shock
Death or serious personal injury
- Before starting work on the pump, make
sure that the fuses have been removed
or the main switch has been switched
off.
- Make sure that the power supply cannot
be accidentally switched on.
CAUTION
Crushing of hands
Minor or moderate personal injury
- Do not put your hands or any tool into
the pump inlet or outlet port after the
pump has been connected to the power
supply, unless the pump has been
switched off by removing the fuses or
switching off the main switch.
- Make sure that all the rotating parts
have stopped moving.
CAUTION
Sharp element
Minor or moderate personal injury
- Do not touch the sharp edges of the
impeller, grinder head, and grinder ring
without wearing gloves.
CAUTION
Biological hazard
Minor or moderate personal injury
- Make sure to seal the pump outlet
properly when fitting the outlet pipe,
otherwise water might spray out of the
sealing.
CAUTION
Hot surface
Minor or moderate personal injury
- Do not touch the surface of the pump
while the pump is running.
WARNING
Crushing of hands
Death or serious personal injury
- When lifting the pump, make sure your
hand is not caught between the lifting
bracket and the hook.
17