Operating Instructions

Service, maintenance and fault rectification
Fault rectification
8
105 |
118
Siemens
A5E36496664A_f
Smart Infrastructure 2021-10-11
Static check on the drive
The following checks are standard tests. These tests can be performed on most
drives which are designed in accordance with the conventional principle "Rectifier –
DC bus – IGBT bridge". The DC bus terminals of the PM230/G120P device are not
generally used. However, the terminals are accessible on some models.
Set the multimeter to "Diode" in order to measure the terminals.
The following tables show where to connect the test cable on the drive and what
test result you are likely to receive. If the variable speed drive fails to pass one of
these tests, please proceed according to the instructions given below the tables.
Rectifier tests
Positive
measuring point
Negative
measuring point
Expected result OK
L1 DC + Diode aperture – typically 0.3 – 0.5V

L2 DC + Diode aperture – typically 0.3 – 0.5V

L3 DC + Diode aperture – typically 0.3 – 0.5V

L1 DC- Diode block – OL/High impedance

L2 DC- Diode block – OL/High impedance

L3 DC- Diode block – OL/High impedance

DC + L1 Diode block – OL/High impedance

DC + L2 Diode block – OL/High impedance

DC + L3 Diode block – OL/High impedance

DC- L1 Diode aperture – typically 0.3 – 0.5V

DC- L2 Diode aperture – typically 0.3 – 0.5V

DC- L3 Diode aperture – typically 0.3 – 0.5V

IGBT bridge test
Positive
measuring point
Negative
measuring point
Expected result OK
U DC + Diode aperture – typically 0.3...0.5 V

V DC + Diode aperture – typically 0.3...0.5 V

W DC + Diode aperture – typically 0.3...0.5 V

U DC- Diode block – OL/High impedance

V DC- Diode block – OL/High impedance

W DC- Diode block – OL/High impedance
