AIR CONDITIONING SYSTEM CAUTION AND WARNINGS
PACK 1 (2) OVHT
In case of PACK 1 (2) OVerHeaT, the MASTER CAUTion comes on and the aural warning sounds. The PACK FAULT light on the
control panel comes on. It goes off when the overheat disappears. The failure is shown amber on the EWD associated to indications on the ECAM BLEED page.In case of PACK 1 (2) OVerHeaT, the MASTER CAUTion comes on and the aural warning sounds. The PACK FAULT light on the
The pack Flow Control Valve (FCV) should start to close pneumatically when the temperature is above 230°C and should be fully closed above 260°C. It will reopen when the overheat disappears. The FAULT light comes on if:
– the compressor outlet temperature is four times above 230°C or once above 260°C,
– the pack outlet temperature is above 95°C.
In this case, the valve must be closed by setting its control to OFF.
PACK 1 (2) FAULT
In case of PACK 1 (2) FAULT, the MASTER CAUTion comes on, the aural warning sounds and the PACK FAULT light on the control panel comes on. The failure is shown amber on the EWD associated to indications on the ECAM BLEED page. When the pack valve position disagrees with its command signal, or when the pack compressor outlet temperature exceeds 230°C four times during one flight, the FAULT light on the pack control P/B comes on.
PACK 1 (2) OFF
In case of PACK 1 (2) OFF, the MASTER CAUTion and the aural warning sounds come on. The failure is shown amber on the EWD associated to indications on the ECAM BLEED page.
NOTE: This warning comes on when one pack is selected OFF with no failure.
PACK 1 (2) REGUL FAULT
In case of a PACK 1 (2) REGULation FAULT, the corresponding message appears amber on the EWD associated to indications on the ECAM BLEED page. In case of pack controller primary computer failure, the pack flow remains at the previous setting. When primary and secondary computers fail, the pack outlet temperature is pneumatically controlled by the anti-ice valve to 15°C.
PACK 1 + 2 FAULT
In case of a PACK 1+2 FAULT, the MASTER CAUTion comes on, the aural warning sounds and the PACK FAULT light on the control panel comes on. The failure is shown amber on the EWD associated to indications on the ECAM BLEED page.
NOTE: Pack 2 is already OFF due to a previous failure.
CKPT, FWD CABIN OR AFT CABIN DUCT OVHT
In case of CocKPiT, ForWarD CABin or AFT CABin DUCT OVerHeaT, the MASTER CAUTion comes on, the aural warning sounds and the HOT AIR fault light comes on, on the control panel. The failure is shown amber on the EWD associated to indications on the ECAM COND page. Any zone duct temperature higher than 88°C causes the hot air Pressure Regulating Valve (PRV) and trim air valves to close electrically. The FAULT light on the HOT AIR P/B goes off when it is set to OFF and the temperature is back below 70°C.
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
In case of a PACK 1 (2) REGULation FAULT, the corresponding message appears amber on the EWD associated to indications on the ECAM BLEED page. In case of pack controller primary computer failure, the pack flow remains at the previous setting. When primary and secondary computers fail, the pack outlet temperature is pneumatically controlled by the anti-ice valve to 15°C.
PACK 1 + 2 FAULT
In case of a PACK 1+2 FAULT, the MASTER CAUTion comes on, the aural warning sounds and the PACK FAULT light on the control panel comes on. The failure is shown amber on the EWD associated to indications on the ECAM BLEED page.
NOTE: Pack 2 is already OFF due to a previous failure.
CKPT, FWD CABIN OR AFT CABIN DUCT OVHT
In case of CocKPiT, ForWarD CABin or AFT CABin DUCT OVerHeaT, the MASTER CAUTion comes on, the aural warning sounds and the HOT AIR fault light comes on, on the control panel. The failure is shown amber on the EWD associated to indications on the ECAM COND page. Any zone duct temperature higher than 88°C causes the hot air Pressure Regulating Valve (PRV) and trim air valves to close electrically. The FAULT light on the HOT AIR P/B goes off when it is set to OFF and the temperature is back below 70°C.
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
HOT AIR FAULT
In case of HOT AIR FAULT, the MASTER CAUTion comes on, the aural warning sounds and the HOT AIR fault light comes on, on the control panel. The failure is shown amber on the EWD associated to indications on the ECAM COND page. The warning occurs when the HOT AIR PRV position disagrees with the selected position (e.g. reset by HOT AIR P/B before cool down of duct temperature below 70°C).
TRIM AIR SYSTEM FAULT (TRIM AIR VALVE FAULT)
In case of a TRIM AIR SYStem FAULT, the corresponding message appears amber on the EWD. This message is activated when a trim air valve motor is stuck. In this case, the trim air system is completely lost, and each pack is controlled separately, pack 1 for the cockpit and pack 2 for the cabin to maintain 24°C.
ZONE REGUL FAULT
In case of ZONE REGULation FAULT (loss of Zone Controller (ZC)), the corresponding message appears on the EWD associated to indications on the ECAM COND page. In case of primary computer failure, the message on the COND page is in ALTN MODE and zone temperatures are controlled to 24°C. In case of primary and secondary computer failure, the HOT AIR and trim air valves close and packs deliver a fixed temperature PACK REGulated which is 20°C for pack 1 and 10°C for pack 2.
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
L+R CAB FAN FAULT
In case of a L+R CABin FAN FAULT the MASTER CAUTion comes on, the aural warning sounds and the failure is shown amber on the EWD associated to indications on the ECAM COND page. This failure does not downgrade the temperature regulation.
LAV+GALLEY FAN FAULT
In case of LAVatory+GALLEY FAN FAULT, the corresponding message appears amber on the EWD. Cabin zone temperature sensors are normally ventilated by the lavatory and galley fan. Therefore cabin zone temperature regulation is lost when a fan failure occurs. Cabin duct temperature is fixed at 15°C. Cockpit temperature regulation is normal (cockpit temperature sensor is ventilated by avionics ventilation system).
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
TRIM AIR SYS FAULT (TRIM AIR SYSTEM OVERPRESSURE)
In case of a TRIM AIR SYStem FAULT, the corresponding message appears amber on the EWD. This message will be activated if the downstream pressure of the HOT AIR PRV is greater than 6.5 psi above the cabin pressure. It disappears as soon as it drops below 5 psi above the cabin pressure.
NOTE: The cargo ventilation and heating systems are optional
and independent for each compartment.
In case of HOT AIR FAULT, the MASTER CAUTion comes on, the aural warning sounds and the HOT AIR fault light comes on, on the control panel. The failure is shown amber on the EWD associated to indications on the ECAM COND page. The warning occurs when the HOT AIR PRV position disagrees with the selected position (e.g. reset by HOT AIR P/B before cool down of duct temperature below 70°C).
TRIM AIR SYSTEM FAULT (TRIM AIR VALVE FAULT)
In case of a TRIM AIR SYStem FAULT, the corresponding message appears amber on the EWD. This message is activated when a trim air valve motor is stuck. In this case, the trim air system is completely lost, and each pack is controlled separately, pack 1 for the cockpit and pack 2 for the cabin to maintain 24°C.
ZONE REGUL FAULT
In case of ZONE REGULation FAULT (loss of Zone Controller (ZC)), the corresponding message appears on the EWD associated to indications on the ECAM COND page. In case of primary computer failure, the message on the COND page is in ALTN MODE and zone temperatures are controlled to 24°C. In case of primary and secondary computer failure, the HOT AIR and trim air valves close and packs deliver a fixed temperature PACK REGulated which is 20°C for pack 1 and 10°C for pack 2.
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
L+R CAB FAN FAULT
In case of a L+R CABin FAN FAULT the MASTER CAUTion comes on, the aural warning sounds and the failure is shown amber on the EWD associated to indications on the ECAM COND page. This failure does not downgrade the temperature regulation.
LAV+GALLEY FAN FAULT
In case of LAVatory+GALLEY FAN FAULT, the corresponding message appears amber on the EWD. Cabin zone temperature sensors are normally ventilated by the lavatory and galley fan. Therefore cabin zone temperature regulation is lost when a fan failure occurs. Cabin duct temperature is fixed at 15°C. Cockpit temperature regulation is normal (cockpit temperature sensor is ventilated by avionics ventilation system).
NOTE: The cargo ventilation and heating systems are optional and independent for each compartment.
TRIM AIR SYS FAULT (TRIM AIR SYSTEM OVERPRESSURE)
In case of a TRIM AIR SYStem FAULT, the corresponding message appears amber on the EWD. This message will be activated if the downstream pressure of the HOT AIR PRV is greater than 6.5 psi above the cabin pressure. It disappears as soon as it drops below 5 psi above the cabin pressure.
NOTE: The cargo ventilation and heating systems are optional
and independent for each compartment.
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