Yaskawa General Purpose Inverter Drive CIMR-G7xxxx Series Static Check

During this video, Rob goes through some basic static checks that can be performed on the G7 series of inverters from Yaskawa. The first step is to be sure that the unit is properly discharged before attempting to static check. There are two terminals along the strip which allow quick and easy access to the DC bus. These can be checked to verify the unit is discharged and once it is the next check can be done. Failure to do so can result in electrical shock and potentially damaging components within the drive even further.

One of the first things to check after the unit is discharged is the resistance between ground and each input and output phase. These should be completely isolated so any type of resistance reading can point to a potential problem. Following this verification, using a digital multimeter with diode checking capabilities, the output and input modules can be checked. Using the negative probe on the positive bus terminal, the positive probe can then be held to R (L1), S (L2), T (L3), U, V, and W. This can then be reversed so the positive probe is held to the negative bus terminal and the negative probe going to each input and output phase. These readings will vary by drive capacity but the difference between each output reading shouldn’t be more than 10% and the same goes for the inputs.

If all of this checks out, feel free to contact us through http://www.precisionzone.net or by phone at 800-551-4420 and our technical support team would be happy to assist with additional troubleshooting.