Checking The Filter Mats; Checking The Cable And Screw Terminals; Checking The Cooling Circuit - Siemens SINAMICS SM120 Operating Instructions & Installation Instructions

Maintenance
9.4 Preventive maintenance
Note
The fiber-optic cables for the gating boards must be properly inserted in the connectors.
9.4.3.5

Checking the filter mats

● Check the air filters in the cabinet doors for pollution.
● Clean the filter mats or replace them if the air flow is obstructed.
See also
Cleaning (Page 102)
Replacing filter mats (Page 101)
9.4.3.6

Checking the cable and screw terminals

● Check the cable and screw terminals regularly to ensure that they are secure.
● Tighten the screws if necessary. When doing this, comply with the specified torques.
● Check the cabling for defects.
● Replace any defective parts immediately.
9.4.3.7

Checking the cooling circuit

● Check the entire cooling circuit for leaks. If you find a leak in a pipe coupling, tighten the
● Compare the measured conductivity value with the permissible conductivity value for the
● Check the water level in the compensating chamber of the deionized water circuit. If the
See also
The external raw water circuit (Page 32)
98
nut by a ¼ turn
system (≤ 0.6 µS/cm). You must replace the ion exchanger if this value is close to 1 µS / cm.
level is too low, add some more water. If the level is too high, drain some water until the
level is correct.
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015