APC SMART-UPS 2200 Trim Active but voltage levels are not outside of desired range.

Anonymous user · ‎2021-06-28

I have an APC SMART-UPS 2200. The trim is currently active. Power Status is showing an Input Voltage of 125.2 VAC. Under my Power Settings, the High Transfer Voltage is set to 127 VAC. I'm not sure why the trim is active without the current voltage exceeding the High Transfer Voltage.

This might be the case and I might just be a newbie, but my Output Voltage in the Power Settings is set to 120 VAC. Is that why the trim is active and the High Transfer Voltage has nothing to do with trim activation?

I live in IL in the US, if that helps answer the question and I've also attached a screen shot of the status/settings.

Any help is greatly appreciated!

voidstar_apc · ‎2021-06-28

Hi Matthew,

It may be hysteresis. Once trim is active, the voltage has to drop well below the high transfer voltage setting before trim disengages. The reason for this is to avoid excessive transfers when the line voltage fluctuates around the high voltage transfer setting.

If this is indeed the case, you should be able to get it out of trim by unplugging the UPS and battery, then reattaching the battery and plugging it back in. Just unplugging/re-plugging the UPS may also kick it out of trim.

See Answer In Context

voidstar_apc · ‎2021-06-28

Hi Matthew,

It may be hysteresis. Once trim is active, the voltage has to drop well below the high transfer voltage setting before trim disengages. The reason for this is to avoid excessive transfers when the line voltage fluctuates around the high voltage transfer setting.

If this is indeed the case, you should be able to get it out of trim by unplugging the UPS and battery, then reattaching the battery and plugging it back in. Just unplugging/re-plugging the UPS may also kick it out of trim.