DOC AIRBUS | AMM A320FLOW OIL PRESSURE AND HIGH OIL TEMPERATURE WARNING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The low oil pressure and high oil-temperature warning-system together with the ECB 59KD monitor the APU oil pressure and the oil temperature. The system protects the APU against low oil pressure and high oil temperature.
When the ECB 59KD receives the low oil pressure or a high oil-temperature signal, it starts the APU automatic shutdown-sequence (Ref. AMM D/O 49-61-00-00).
** ON A/C NOT FOR ALL The low oil pressure and high oil-temperature warning-system together with the ECB 59KD monitor the APU oil pressure and the oil temperature. The system protects the APU against low oil pressure and high oil temperature.
When the ECB 59KD receives the low oil pressure or a high oil-temperature signal, it starts the APU automatic shutdown-sequence (Ref. AMM D/O 49-61-00-00).
2. Component Location
** ON A/C NOT FOR ALL 
LOP- and HOT-Warning - Component Location| ------------------------------------------------------------------------------- |
| FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA |
| | | | | DOOR | REF. |
| ------------------------------------------------------------------------------- |
| SENSOR - OIL TEMPERATURE 315 315AL 49-94-13 |
| SWITCH - LOW OIL PRESSURE 315 315AL 49-94-14 |
3. System Description
A. Low Oil Pressure and High Oil Temperature Warning
The low oil pressure and high oil-temperature warning-system comprises of:
The low oil pressure and high oil-temperature warning-system comprises of:
- a Low Oil-Pressure Switch (LOP SW),
- an Oil Temperature Sensor.
4. Interface
The Low Oil Pressure and High Oil Temperature Warning system has interface with:
** ON A/C NOT FOR ALL The Low Oil Pressure and High Oil Temperature Warning system has interface with:
- the APU Control and Monitoring System (Ref. AMM D/O 49-61-00-00),
- the Storage and Distribution System (Ref. AMM D/O 49-91-00-00).
5. Operation/Control and Indicating
The Oil Temperature Sensor measures the temperature of the oil in the gearbox. The ECB 59KD receives the temperature signal and monitors the APU oil temperature. It starts the APU automatic shutdown sequence if the oil temperature is more than the limit (Ref. AMM D/O 49-61-00-00).
The LOP SW monitors the pressure downstream of the oil pressure filter. It transmits a low oil-pressure signal to the ECB 59KD when the oil pressure decreases below the limit (Ref. AMM D/O 49-61-00-00). The ECB 59KD then starts the APU automatic shutdown sequence.
The Oil Temperature Sensor measures the temperature of the oil in the gearbox. The ECB 59KD receives the temperature signal and monitors the APU oil temperature. It starts the APU automatic shutdown sequence if the oil temperature is more than the limit (Ref. AMM D/O 49-61-00-00).
The LOP SW monitors the pressure downstream of the oil pressure filter. It transmits a low oil-pressure signal to the ECB 59KD when the oil pressure decreases below the limit (Ref. AMM D/O 49-61-00-00). The ECB 59KD then starts the APU automatic shutdown sequence.