UMC errors related to specific location, frustrated

[hiroshiy]

Actually if UMC contains a microprocessor it should already include some form of line filtering already... So I'm not sure it's working or not.

 

[AmpedRealtor]

Tesla's HPWC is UL and CE certified. Why don't you try that?

 

[stopcrazypp]

Tesla's HPWC is UL and CE certified. Why don't you try that?

His issue is with the office charging. I don't think he would want to install a permanent HPWC at the office. Something cheaper like some of the small third party portable EVSEs can be tried to eliminate the UMC as an issue.

It does not appear his particular UMC is defective (if three others have been tried), but it could be that the UMCs are more sensitive in general than other EVSEs.

 

[Chris TX]

The problem is, if the power going through the UMC is bad enough to trip the safety features of the UMC, do you really want it piped into your car with another EVSE???

 

[hcsharp]

...
Based on the conditions occurring when the charge fails the most likely cause is the power supply for the electronics in the UMC itself shuts off or faults, resetting its cpu. Most of the time there is no flashing code, the light goes from the normal charging pattern to solid green.
...

You might have something with this theory. Most modern micros will reset if the voltage on one of the A/D pins goes too high. There's several A/D measurements. Those pins are much more sensitive than the power supply to the micro on a lot of devices and it's often harder to filter them. You need to try a Clipper Creek charger and see what happens.