Frequently asked questions
How do you perform a diode static check on the FLEX58 drives?
FA172705
28 September 2021
Issue:
Diode static check on FLEX58.
Product Line:
Flex58 or ATV58
Environment:
All
Cause:
Checking diodes to see if they are shorted.
Resolution:
Before starting, make sure you turn off ALL POWER on the drive. Wait 15 mins, so that the DC bus has time to discharge below 24vdc on PA+ and PC-.
Using a multi-meter with a diode checker , measure between the DC Bus terminals PA/+ to L1-L2-L3 , then reverse the meter leads and read again between PA/+ to L1-L2-L3. In one direction, you should read 0.30 to 0.60, and in the reverse direction you should read OL. Repeat this measurement with the blue wire (PC/-) on the J18 connector or on the (PC-) terminal. If "shorted circuit" is read in any of the readings, repair or replace the drive is recommended.