Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-51
11 July 2018
ECAM HYD PAGE
All pumps are indicated by triangles on the ECAM. When the pump is off it is a white open triangle, when
the pump is ON and pressure is normal a green triangle is shown. An amber triangle means the pump is
on but pressure too low.
HYD OVERHEAD PANEL
The Hydraulic panel on the overhead panel allows the crew to interact with the system in case of failures.
As with all overhead panels a completely dark panel indicates is in AUTO mode and there are no
problems.
• The ENG PUMP pb (ENG 1 PUMP & ENG 2 PUMP) are dark in AUTO mode (ON and pressure
within limits). When there is a problem FAULT will show. When pushed OFF will show and the
pump will be offline, and the system depressurize.
• The Blue Electric Pump pb (ELEC PUMP) is always active when one of the AC buses has power.
When pushed (after lifting the switch guard) OFF will show and the system will depressurize.
When the pump is on, but pressure too low FAULT will show. The ECAM will show more details
on that.
• The Yellow Electric Pump pb (ELEC PUMP) is dark by default, indicating it is not active. When
pushed ON will show and the pump will energize. FAULT will show if there are problems, check
the ECAM for more details. Note the Yellow system will pressurize the flight controls (via the
PTU) when the main engines are off!
• The Power Transfer Unit (PTU) is default dark and in AUTO mode. When differential pressure is
detected it will pressurize the low-pressure system. When clicked OFF will show and the Green
and Yellow systems will not be connected. FAULT will show if there is a problem, the ECAM will
display the problems.