SMX750C Fan

[jwood_ok]

Hello,

I was taking a look at a couple of SMX750C's and noticed that the fan was not turning on one of them.  I then looked at another and found the same thing.  Initially I thought something was wrong, but since I've run into this twice, I'm wondering if the fan does not run all the time, but only kicks in when cooling needs to take place, and I wanted to verify that.

[Teken · Accepted solution]

The fan will come on during the following conditions / reasons:

Upon first start up, loss of AC Mains, over heat condition, recharging. Depending upon what version of UPS firmware it will also come on during an update.

The system has two fan speeds even though it’s not a 4 wire PWM vs 2 wire fan.

NOTE: The system tracks if and when these conditions are present / happened in the Event / UPS logs.

Unplugging the fan will cause the system to declare a fan error. An internal over heat condition whether battery / system will declare an active fault / condition.

Questions Ask - If not, and this answered your query please consider marking this reply as a solution to help the next person asking the same . . . 👍

[jwood_ok]

Thank you - so in otherwords, the fan does not run constantly, only in certain conditions, so there's not necessarily anything unusual about it not running - I was thinking of it more like a power supply fan that runs all the time, which is why I was initially concerned.

[Teken]

Correct, if the previous reply answered your question please mark it as a solution to help the next person asking the same. 👍