Mitsubishi FTC2B Flow temperature controller Mitsubishi Electric part code: PAC-IF032B-E. The FTC2B has been developed to allow the Ecodan air to water heat pump range to interface with third party or BEMS (Building Energy Management System) controls. The interface slows simpler operation of the Ecodan heat pump range via inputs from the BEMS system such as volt free contacts and voltage inputs that may be generated as outputs from the BEMS system.