APC USV: Error connecting to network module

[^rooker]

[PROBLEM]
Trying to connect to the APC UPS network module per web-interface (http).
Got the following error:

Error: The application was not able to load.
You are attempting to access a Schneider device.

There was a problem loading the application. Please login to the device via telnet for more details.

Logging in per Telnet (Thanks PuTTY!) to the UPS.
No error visible, except that the eventlog seems to behave weird:

Code: Select all

apc>eventlog
E100: Command Failed
Event Log Not Available

I've compared the details to an identical UPS. All firmware versions match:

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apc>system
E000: Success
Name:     Unknown
Contact:  Unknown
Location: Unknown
DateTime: 05/29/2014:02:53:26
User:     Administrator
Up Time:  65 Days 21 Hours 29 Minutes
Stat:     P+ N4+ N6+ A-
Bootmon:  bootmon:v1.0.2
AOS:      aos:v5.1.7
App:      sumx:v5.1.7

I've tried the following:

• reboot
• resetToDef & reboot
• format & reboot

Didn't work

Links:
http://blog.mpecsinc.ca/2012/06/apc-ap9 ... error.html
http://www.apcmedia.com/salestools/MLAN ... _R0_EN.pdf
http://technologyordie.com/apc-network- ... -cli-setup

[^rooker]

Aha!

Reading the manual helps
On page 10 of the "UPS Network Management Card 2 - User's Guide, firmware v5.1.7" it says:

Main screen status fields:
A– The application has a bad checksum.

Lucky me I have 2 identical APC UPS with identical NMCs to compare.
The functioning APC NMC had the following status:

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Stat:     P+ N4+ N6+ A+

whereas the problematic one has:

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Stat:     P+ N4+ N6+ A-

So I updated the firmware from 5.1.7 to v6.2.1, using the FTP way (See instructions in "How do I upgrade the firmware on an APC NMC?" below).
The "A-" was still there...

For some unknown reason, there was no "sumx" firmware file on the problematic UPS. On the functional one it was.
So I uploaded that (by FTP), too.

Now things look better:

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Stat : P+ N4+ N6+ A+

Web interface now also working properly.
Problem solved

Probably it was the missing "sumx" binary file in the first place?


Links:

• How do I upgrade the firmware on an APC Network Management Card (NMC)? - FTP instructions
• APC UPS NMC 2 firmware upgrade (by Ben Stienstra)