What does the OC Act (NSW) say? In Victoria, committee members have immunity:
118 Immunity of committee members
(1) A member of a committee or a sub-committee is not personally liable for anything done or omitted to be done in good faith—
(a) in the exercise of a power or the carrying out of a function under this Act or the regulations; or
(b) in the reasonable belief that the act or omission was in the exercise of a power or the carrying out of a function under this Act or the regulations.
(2) Any liability resulting from an act or omission that, but for subsection (1), would attach to a person, attaches instead to the owners corporation.
I suspect it would be similar in NSW.