Carrier 48/50PD05 manual Economizer Control Board ECB

Economizer Control Board (ECB)

The ECB controls the economizer actuator. (See Fig. 17 and Table 20.) The control signal from the ECB uses either the MFT (Multi-Function Technology) digital communication protocol or a 4 to 20 mA output signal as defined by the configuration Configuration→ECON→E.CTL. The ECB has inputs for Indoor Air Quality (IAQ), Outdoor Air Quality (OAQ), enthalpy and RH sensor. It also controls two power exhaust outputs.

By digitally communicating with the ECB, the economizer actuator is able to provide the damper position and diagnostic information to the ComfortLink controller. The damper position is displayed at Outputs→ECON→EC.AP. Diagnostic information is displayed via Alert T414. More information about these alarms is contained in the Alarms and Alerts section.

IMPORTANT: The Economizer Control Board (ECB) has a 4-position DIP switch that is factory set to ‘0’ (ON, towards

the center of the board). Do not change this setting.

48/50PD

C07027

Fig. 17 - Economizer Control Board (ECB)

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