Yes and no.
But generally no.
The member acting on his own would need to prove to the OC that he was acting in their best interests. That being a very subjective argument, it would be hard to satisfy owners.
The committee is the executive council of the OC. That means that decisions are made collectively.
There are situations where elected committee are absent (ie they don’t participate in the decision making process). In this case the chairman needs to make sure the members participate, or ask them to resign or have them removed by a resolution.
Some committee members, in a misguided way, just make unilateral decisions for the OC, believing they are doing good. The chairman needs to have a word with this type of member.