Specifications

6
MASTER CONTROLLER
Description
The Master Controller 2.0 is a custom-designed microprocessor-based electronic controller for Master-Bilt
refrigeration products. The controller caple to control an electric expansion valve in response to evaporator
superheat and return air temperature. The hardware and input/output descriptions and connections of a Master
Controller 2.0 are shown below.
Figure 1 . Master Controller 2.0 Board Layout.