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 increasing pressure
13 PSID plus or minus 1 decreasing pressure

** ON A/C NOT FOR ALL

2. Low Oil Pressure Indication (Warning)

When the oil pressure drops down to 13 PSID plus or minus 1 PSID (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:
ENG1 (2) OIL LOW PRESS
THROTTLE 1 (2) IDLE
Activation on the ground of the following circuits:
WN (Emergency Escate Slide Release Warning)
CC (Engagement and Internal Monitoring)
CA (Electrical Power Supply)

When the oil pressure reaches 16 PSID 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 system,
the following circuits are inhibited:
WN (Emergency Escape Slide Release Warning)
CC (Engagement and Internal Monitoring)
CA (Electrical Power Supply)

[Rev.10 from 2021] 2026.04.01 13:09:37 UTC