Grundfos G 401 Instructions Manual page 12

8.6.1 Inserting the SIM card
Do not insert/replace the SIM card unless the G 400
is dead.
Note: The internal back-up battery must also be
switched off.
Step
1
2
3
4
12
Illustration Action
Switch off the normal power supply and
the UPS by removing the terminals to
"+, –, 1, 2, 3".
Switch off the internal back-up battery by
pushing the switch to the left.
Use a ball-pointed pen or other pointed
object to release the SIM card drawer.
Note: The button must not be pushed in
more than 5 mm.
Pull the SIM card drawer completely out.