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NRR 2-52, NRR 2-53, URB 55 - Installation & Operating Manual -
850646-00
What to do in the event of system malfunctions
Checking installation and function
When you have remedied system malfunctions, perform a function test as follows.
■
Check installation and function
■
Check settings
In the event of malfunctions or faults that cannot be remedied with the aid of this Installation &
Operating Manual, please contact our service centre or authorised agent in your country.
Taking the NRR 2-52, NRR 2-53 out of service
1.
Switch off the supply voltage and switch off the power to the equipment.
2.
Check that the equipment is not live.
3.
Unscrew and pull off the lower terminal strip, see
Fig. 10
A
;
B
4.
Release the slider holder on the base of the equipment and detach the level controller from the
support rail.
Taking the URB 55 out of service
1.
Switch off the supply voltage and secure so that it cannot be turned on again.
2.
Unplug the mains connector from the unit.
3.
Remove all plug and socket connections.
4.
Unscrew the screws and remove the retaining clips.
5.
Carefully push the unit out of the cutout in the door of the control cabinet.
