He had faced charges for acts contrary to good sportsmanship and disputing a referee decision.
A spectator at the game, Lungi McGregor, was also fined $50 for his involvement in the incident.
Pioneer spokesperson Tere Te Tau said the club would meet next week to decide if they would take any further action against the union regarding the bid to move games from Jeans St.
It's understood an incident involving a referee was reported to officials following a Division 2 football match last Saturday.
A player is alleged to have made threats against the referee after the match. Capital Football chief executive Richard Reid did not return calls and the referee could not be reached.