Siemens V20_EN_rev01-08032019.docx
12-1
12 CHECKS AND MAINTENANCE
To ensure long service life and optimum operation of the inverter, carry out the following checks at regular
intervals.
Operate on the inverter only after disconnecting the power and making sure the keypad is off.
1- Remove the dust collected on the cooling fins and on the control circuit board, if possible by blowing with
compressed air or using a vacuum cleaner.
2- Make sure no screws are loose in the power or control terminal blocks.
3- Ma
ke sure inverter operation is “normal” and that there are no signs of anomalous overheating.
12.1
MEGGER TEST
When doing insulation tests using a Megger tester on the input/output cables or on the motor, remove all the
connections from all the inverter terminals and perform the test only on the power circuit, according to the di-
agram opposite. Do not test the control circuits.
