Siemens SINAMICS GL150

● Any grounding switches that may be present are closed.
● The mushroom pushbutton on the control unit is actuated.
By pressing the mushroom pushbutton, the contactor safety combination, and therefore the
undervoltage protection to the power units, is interrupted. Secure the mushroom pushbutton
so that it cannot be released by attaching a warning plate, for example.
You can open the power unit door when the green "Door lock release" lamp is lit.
WARNING
Danger due to high voltages although the door interlocking has been released
Even when the door interlocking is released, dangerous high voltages can still be present at
the auxiliary circuits (fans, anti-condensation heating, closed-loop control, etc.). High voltages
can cause death or serious injury if safety rules are not observed or if equipment is handled
improperly.
● Make sure that work is only carried out by qualified personnel under due observance of the
five safety rules, the warning information in these operating instructions, and the safety-
related information on the product itself.
If the auxiliary voltage fails, you can only unlock the doors manually. To unlock the doors,
proceed as described in the chapter titled "Preparation for use".
See also
Opening doors in preparation for use (Page 78)
9.4 Preventive maintenance
The purpose of an inspection is to ascertain and evaluate the current status of the equipment.
An inspection mainly comprises visual checks. Inspections should be carried out based on a
schedule that meets the needs of the special ambient conditions at the location of use. The
following servicing and inspection instructions are used as the basis for regular inspection of
the equipment.
Maintenance work Carried out by Frequency Comments
Check the cooling system Operating com‐
pany
After one year See the specifications in
the Operating Instructions
Clean the outside of the cab‐
inet
Operating com‐
pany
As required Visual inspection, clean if
required
Clean the inside of the cabi‐
net
Siemens serv‐
ice personnel
Annually Visual inspection, clean if
required
Check power and control
connections
Operating com‐
pany
After one year, and every
four years thereafter
Check internal connections Siemens serv‐
ice personnel
After one year, and every
four years thereafter
Maintenance
9.4 Preventive maintenance
SINAMICS GL150 6SL38555UN113KA0Z
126 Operating Instructions Rev.201910281450 EXAMPLE