LOW OIL PRESSURE WARNING SYSTEM - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. Low Oil Pressure Switch

The low oil pressure switch is located on the lubrication unit outlet line.
Actuation of the low pressure switch is at:
16 psid (1.10 bar) increasing pressure
13 psid (0.90 bar) plus or minus 1 psid (0.07 bar) decreasing pressure

** ON A/C NOT FOR ALL

2. Low Oil Pressure Indication (Warning)

When the oil pressure drops down 13 psid (0.90 bar) plus or minus 1 psid (0.07 bar) (decreasing) the pressure switch closes; in result:

The MASTER WARN light (red) located on the glareshield comes on.
The audio warning is activated
The ENG page appears on lower display unit of the ECAM system :
Oil pressure indication flashes red.
Warning messages appear on the upper display unit:
ENG 1, (2) OIL LOW PRESS
THROTTLE 1, (2) IDLE
Activation on the ground of the following circuits:
WN (Emergency Escape Slide Release Warning)
CC (Engagement and Internal Monitoring)
CA (Electrical Power Supply)

When the oil pressure reaches 16 psid (1.10 bar) increasing, the pressure switch opens; in result:

The MASTER WARN light goes off.
the audio warning is deactivated
the oil pressure is indicated in green
warning messages disappear on the upper display unit of the ECAM
Inhibition of the following circuits:
WN (Emergency Escape Slide Release Warning)
CC (Engagement and Internal Monitoring)
CA (Electrical Power Supply)

[Rev.10 from 2021] 2026.04.01 03:39:48 UTC