Runtime Calibration Refused

[BillP]

Hi,

yesterday I replaced the battery of my Smart-UPS750.

I thought this would be the right time for updated the firmware of the Network Managment Card 2.

So I have done it.

After that I would run the runtime calibration which was refused by NMC every time.

I found a post in the forum, that the firmware from the UPS has should be updated too. So I did it and I updated the UPS from 5 (ID17) to 7.1 (ID17).

Unfortunately the calibration does not work after all.

The following have I done also:

• discharging and charging the battery
• restoring to factory defaults
• reboot of NMC and UPS.

But nothing solved the problem.

Has anyone any further suggestion how to solve the problem?

Thank you.

Best Regards,

Martin

[Terry_Kennedy_apc]

Normally the only reason for the UPS to refuse the calibration command is a) the battery is not at 100% or b) it is doing something with the battery already (on battery, self-test, etc.).

I'd suggest running a self-test, and if that passes, try the calibration again once the battery returns to 100% from the self-test.

[BillP]

Hi Terry,

thank you for your answer.

I have done this before.

The self test has passed before and I have waited until the battery load was 100.0%.

Today I tried the calibration and it was refused too, after passed self test (yesterday). (As you can see on se5.png)

[Terry_Kennedy_apc]

I think you'll need to wait for the APC folks to see this, then. Here in the US, Monday is a holiday. You can find your local support contact info here.

[BillP]

Hi,

Can you run the calibration test from the Smart-UPS LCD panel? To do this you click on the Esc key, use the up or down arrow to scroll to Test & Diags, click on the enter key, use the up or down arrow to scroll to Calibration Test.

[BillP · Accepted solution]

Hi Bill,

this was the right hint. Thank you.

I tryed to start the calibration from front panel, which was refused too.

But here I got a helpfull error message. "Calibration need at at least 10% load".

So I put more consumer to the outlets, and now I could start the calibration from NMC.

Sorry for the inconvenience.

Best Regards,

Martin

[Binod]

Hi , 

In my case self-test passed but still the callibration got the result: Refused..

Cause: load too low

Model: Smart-UPS 750

Firmware: UPS 08.3

Manufature date: 2013

Any idea ?

Binod

[TonKei]

Hello Binod

There is a FAQ document detailing the requirements for doing a runtime calibration on the SMT/SMX units.

You can find the FAQ here -> https://www.apc.com/us/en/faqs/FA314748/

In short, there are minimum requirements that need to be met, or the unit will refuse the calibration. 

"UPS load greater than a minimum threshold, which is proportional to the number of External Battery Packs (XBP) connected. With no XBP connected, the minimum required load is 10% (SMX or SMT); with one XBP: 25%; with 2 XBPs: 40%; with 5 or more XBPs: 85%"

On another note, you are posting to a thread that was marked as solved a while back, which makes your post very easy to overlook.

Best regards

Tonny 

[Oleg8R]

Have same issue. Calibration refused with a note "state of charge not acceptable". UPS load is higher than 10% and battery is fully charged. 

Model
Smart-UPS 1500
SKU
SMT1500RMI2U
Serial Number
3S2238X10394
Firmware Revision
UPS 09.3 (ID18)
Manufacture Date
09/20/2022
Apparent Power Rating
1500 VA
Real Power Rating
1000 W
Battery SKU
APCRBC133