EGPWS Control Panel
FAULT - The TERR FAULT light illuminates in case of a system malfunction and triggers the NAV GPWS TERR DET FAULT ECAM and GPWS TERR status messages. The GPWS is not affected by this fault.
ON - When the TERR Switch is selected ON all lights are extinguished and it activates all modes of EGPWS for operation.
OFF - The OFF light illuminates white when selected OFF and inhibits all EGPWS terrain modes including pop-up. The GPWS is not affected.