This document covers the procedure for testing the function of the mode selector switch (i.e. AUTO/MAN switch) for an Airmaster controller. The front panel must be removed from the controller.
Symptoms of a failed mode selector switch may include open circuit alarms (all lamps flashing red on the controller), improper operation of the adjustable pitch limit stops, loss of operation of the propeller in manual override or automatic mode, or anomalous indications displayed by the controller. If the switch is defective, the controller front panel must be replaced.
Mode Switch Inspection 
