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Video: How to perform a diagnostic check on input and output side of an ATV61/71 drive?

Published date: 21 November 2019

Issue:
Cheking input diodes and output IGBTs on ATV61/71 drives.

Product line:
Altivar 61 & Altivar 71

Environment:
All models, all serial numbers 

Cause:
Drive has faulted. Customer wants to do a full diode and IGBT check on the drive to see if it is functional.

Resolution:

Warning: This test needs to be done with the power off to the drive and the DC bus discharged.

Sizes 25HP and below

Check input:
Using a digital Fluke multimeter or similar meter set to the diode scale. Measure from L1, L2, L3 to PA/+. Your meter should read 0.3 to 0.7 V in the forward bias direction and 'OL' in the reverse bias direction.
Using the meter in diode scale, measure from L1, L2, L3 to PC/-. Your meter should read 0.3 to 0.7 V in the forward bias direction and 'OL' in the reverse bias direction. 

Check output:
Now measure the output terminals the same way. Be sure your meter is set in diode scale and measure T1, T2, T3 to PA/+. You should read 0.3 to 0.7v in the forward bias direction and 'OL' in the reverse bias direction. 
Measure T1, T2, T3 to the PC/- terminal. Your meter should read 0.3 to 0.7v in the forward direction and 'OL' in the reverse direction.



On 30HP and above sizes

Check input:

Using the meter in Ohm scale, check L1, L2, L3 to PA/+ you will read 40k Ohms or higher in both forward and reverse direction.
Put your meter in the diode scale and from L1, L2, L3 to PC/-. Your meter should read 0.3 to 0.7v in the forward bias direction and 'OL' in the reverse bias

Check Output:
Now check T1, T2 ,T3 to PA/+ in diode scale. Your meter should read 0.3 to 0.7v in the forward bias direction and 'OL' in the reverse direction.
Measure T1, T2, T3 to the PC/- terminal. Your meter should read 0.3 to 0.7v in the forward direction and 'OL' in the reverse direction.

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