ON: Pump pressurizes the system when the engine is running.
OFF: Pump is depressurized.
FAULT: Amber light and ECAM caution, if :
Reservoir level is low
Reservoir overheats
Reservoir air pressure is low
Pump pressure is low (inhibited on the ground, when the engine is stopped).
This light goes out, when crew selects OFF, except during an overheat. The light stays on as long as the overheat lasts.
BLUE ELEC PUMP pb (guarded)
AUTO: If AC power is available, electric pump operates in flight or on the ground, if one engine is running or if the crew has pressed the BLUE PUMP OVRD pushbutton on the maintenance panel.
OFF: The pump is de-energized.
FAULT: Amber light and ECAM caution, if :
Reservoir level is low
Reservoir overheats
Air pressure in the reservoir is low
Pump is delivering low pressure (inhibited on the ground, when the engines are stopped)
Pump overheats
Light goes out, when the crew selects OFF, except during an overheat. The light stays on as long as the overheat lasts.
YELLOW ELEC PUMP pb (spring loaded)
ON: Electric pump is ON
OFF: Pump is off. It comes on automatically – when lever of the cargo door manual selector valve is set to OPEN or CLOSE. This inhibits the operation of other yellow system functions (except alternate braking and engine 2 reverse).
FAULT: Amber light and ECAM caution, if :
Reservoir level is low
Air pressure in the reservoir is low
Reservoir overheats
Pump pressure is low
Pump overheats
Light goes out when the crew selects OFF, except during an overheat. The light stays on as long as the overheat lasts.
PTU pb
AUTO: The bidirectional PTU is armed and both yellow & green electrohydraulic valves are open. The power transfer unit runs automatically when the differential pressure between the green and yellow systems is more than 500 PSI.
OFF: Both green & yellow PTU electrohydraulic valves close. Power transfer stops.
FAULT: Amber light and ECAM caution, if :
Green or Yellow reservoir overheats
Green or Yellow reservoir has low air pressure
Green or Yellow reservoir has a low flluid level
Light goes out when the crew selects OFF, except during an overheat. The light stays on as long as the overheat lasts.
RAT MAN ON pb
Manually extends the RAT at any time by pressing this pb.
RAT extends automatically if AC BUS 1 and AC BUS 2 are lost.
