0x0235 site wiring fault exists error message appears and clears itself

[Anonymous user]

Ok, this is on an SMT2200 with an NMC2.

At 3:13am, I receive 3 seperate 0x235 Critical - UPS: A site wiring fault exists messages. Basically, it hit, cleared itself, hit again, cleared, hit again, and cleared again. Then, normal operation and no more notifications after that. Here's the data log from that time period. Nothing out of the ordinary here... Just a minor 3v drop in that time frame, but really... 3v?

Date	Time	Vmin	Vmax	Vout	Iout	%Wout	%out	FrqOut	%Cap	Vbat	Tups
06/17/2015	03:52:21	123.80	124.50	124.50	1.59	9.09	8.39	60.25	100.00	54.53	18.89
06/17/2015	03:42:21	123.80	124.50	124.50	1.59	9.09	8.39	60.00	100.00	54.53	18.39
06/17/2015	03:32:21	123.80	124.50	123.80	1.59	9.09	8.39	60.00	100.00	54.53	18.89
06/17/2015	03:22:21	120.89	124.50	124.50	1.59	9.09	8.39	60.00	100.00	54.53	18.39
06/17/2015	03:12:21	123.09	124.50	123.80	1.59	9.09	8.39	60.25	100.00	54.53	18.89

So, the error is not live and no alarm is currently present. Essentially, for a window of 10 seonds or so, it registered a wiring fault, but not a permanent one. So what do I need to do here? I get tons of other Infomational notifications from this unit that it's losing connection to the outlet ports and then estores the local network manager interface, but those are just Informational, not Critical.

[BillP]

Kevin,

A 3 volt change would not cause a site wiring fault.  A site wiring fault is caused by:

1. Overloaded neutral wire (>5vdc measured between Neutral and Ground).

2. Reversed polarity (hot and neutral wires are reversed).

3. Missing ground wire. (Note: this also includes using a 3 prong to 2 prong adapter)

If it cleared and returned rapidly like it did in your case, it sounds like it is not a true issue.  Is there any construction going on locally?  Often times disturbances like construction can effect utility power and trigger site wiring faults temporarily.

[Anonymous user · Accepted solution]

Negative - nothing going on at 3am that day. Some maintenance crews might be out during work hours, but it was isolated outside operational hours here.