SYSTEM DISPLAY - COND & CAB PRESS PAGES - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. CAB PRESS Page

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

As shown on the following figure the CAB PRESS page includes:
Item 1

the cabin differential pressure, also displayed on the CRUISE page (Ref. 31-67-00)

Item 2

the cabin vertical speed, also displayed on the CRUISE page (Ref. AMM D/O 31-67-00-00)

Item 3

the landing field elevation indication, also displayed on the CRUISE page

Item 4

the cabin altitude, also displayed on the CRUISE page (Ref. AMM D/O 31-67-00-00)

Item 5 and 7

the active system indication and mode

Item 6

the Safety Valves indication

Item 8 and 13

the PACK 1(2) indication
the flow control indications from the packs (triangles)

Item 9

the outflow valves indications

Item 10

the Extract Valve indication

Item 11

the VENT Indication

Item 12

the INLET Valve indication

Item 13

refer to item 8

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

As shown on the following figure the CAB PRESS page includes:
Item 1

the cabin differential pressure, also displayed on the CRUISE page (Ref. 31-67-00)

Item 2

the cabin vertical speed, also displayed on the CRUISE page (Ref. AMM D/O 31-67-00-00)

Item 3

the landing field elevation indication, also displayed on the CRUISE page

Item 4

the cabin altitude, also displayed on the CRUISE page (Ref. AMM D/O 31-67-00-00)

Item 5 and 7

the active system indication and mode

Item 6

the Safety Valves indication

Item 8 and 13

the PACK 1(2) indication
the flow control indications from the packs (triangles)

Item 9

the outflow valves indications

Item 10

the Extract Valve indication

Item 11

the VENT Indication

Item 12

the INLET Valve indication

Item 13

refer to item 8

The symbols related to these indications are described hereafter:

A. Cabin Differential Pressure (delta P)
Item 1

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

Item 1

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

Case 1
CAB PRESS Page - Display of the parameter: CABIN DIFFERENTIAL PRESSURE ** ON A/C NOT FOR ALL
CAB PRESS Page - Display of the parameter: CABIN DIFFERENTIAL PRESSURE ** ON A/C NOT FOR ALL
The needle and delta P digital value are normally green.

Case 2
The needle and the digital value are green in the range -0.4 to 8.5 PSI. The digital value is green and pulsing in the range:

1.5 < delta P < 8.5 PSI
and A/C in final approach.
It stops pulsing when the value drops below 1 PSI.
(case 2)
They become amber when:
delta P analog value < minus 0.4 PSI
or 8.5 PSI < delta P analog value
(case 3)

If delta P is not available:
the digital value is replaced by amber XX
the needle goes out of view.
(case 4)

delta P range
the delta P value can vary from -9.9 to 31.9 PSI in 0.1 PSI steps.

delta P range
the delta P value can vary from -9.9 to 9.9 PSI in 0.1 PSI steps, for the digital value and from -1 PSI to 9 PSI for the analog value (needle position).

B. Cabin Vertical Speed

CAB PRESS Page - Display of the parameter: CABIN VERTICAL SPEED ** ON A/C NOT FOR ALL

C. Cabin Vertical Speed - Case 1
The needle and V/S digital value are normally green.

D. Cabin Vertical Speed - Case 2
the digital value is green and pulses when:
1800 ft/mn < cabin vertical speed value
It stop pulsing when the value drops below 1600 ft/mn and the A/C is in cruise
the digital value is green and pulses when:
1750 ft/mn < cabin vertical speed value
It stop pulsing when the value drops below 1650 ft/mn and the A/C is in cruise

E. Cabin Vertical Speed - Case 3
They become amber when:
2000 ft/mn < V/S analog value
or V/S analog value < - 2000 ft/mn

F. Cabin Vertical Speed - Case 3
If V/S is not available:
the digital value is replaced by amber XX
the needle goes out of view.

G. Cabin Vertical Speed - Case 4
If V/S is not available:
the digital value is replaced by amber XX
the needle goes out of view.

H. Cabin Vertical Speed - V/S range
the V/S value can vary from -2250 to 2250 ft/mn in 50 ft/mn steps.
the V/S analog indication can vary from -2250 to 2250 ft/mn.

I. Cabin Vertical Speed - V/S range
the V/S digital value can vary from -6350 to 6350 ft/mn in 50 ft/mn steps.
If the absolute value of V/S > 2250 ft/mn:
the needle does not move when the max. positions are reached but the V/S digital value can vary up to +/- 9950 ft/mn
If the absolute value of V/S > 2250 ft/mn:
the needle does not move when the max. positions are reached but the V/S digital value can vary up to +/- 6350 ft/mn

J. Landing Field Elevation Indication

CAB PRESS Page - Display of the parameters: LANDING ELEVATION and SAFETY VALVE ** ON A/C NOT FOR ALL

(1) Case 1:
LDG ELEV is displayed in white with MAN displayed in green and the LDG ELEV value in green when the Landing Elevation value transmitted by the CPC via the System Data Acquisition Concentrator (SDAC) is valid and the manual control has been selected as transmitted by the CPC and the SDAC.

K. Landing Field Elevation Indication

CAB PRESS Page - Display of the parameters: LANDING ELEVATION and SAFETY VALVE ** ON A/C NOT FOR ALL

(1) Case 1:
LDG ELEV is displayed in white with MAN displayed in green and the LDG ELEV value in green when the Landing Elevation value transmitted by the CPC via the SDAC is valid and the manual control has been selected as transmitted by the CPC and the SDAC.

the value 500 FT (example) is displayed in green and can vary from -9950 ft to 99,950 ft in 50 ft steps.

(2) Case 1:
LDG ELEV is displayed in white with MAN displayed in green and the LDG ELEV value in green when the Landing Elevation value transmitted by the CPC via the SDAC is valid and the manual control has been selected as transmitted by the CPC and the SDAC.

the value 500 FT (example) is displayed in green and can vary from -9950 ft to 32,750 ft in 50 ft steps.

(3) Case 2:
LDG ELEV is displayed in white
AUTO is displayed in green when the landing field elevation data from the CPC via the SDAC is valid, the manual mode is not selected as transmitted to the SDAC.
the value 500 FT (example) is displayed in green withe the same range and resolution as in case 1.

(4) Case 3:
LDG ELEV is displayed in white
AUTO is displayed in green when the manual mode is not selected as transmitted to the SDAC.
the value is replaced by amber XX when the landing field elevation value as transmitted by the cabin pressure controller to the SDAC is not available.

(5) Case 4:
The landing field elevation indication is not displayed when the manual mode is selected (MODE SEL P/BSW in MAN configuration).

L. Cabin Altitude

CAB PRESS Page - Display of the parameter: CABIN ALTITUDE ** ON A/C NOT FOR ALL

(1) Case 1
The needle and the cabin altitude digital value are normally green.

(2) Case 2
the displayed cabin altitude value and the needle are green and pulse when:
8800 ft < cabin altitude < 9550 ft
They stop pulsing when the value drops below 8600 ft.

(3) Case 3
They become red when the cabin altitude analog value is more than
9550 ft.

(4) Case 4
If the cabin altitude is not available:

the digital value is replaced by amber XX
the needle goes out of view.

(5) CAB ALT range
The cabin altitude value can vary from -9950 to 32750 ft in 50 ft steps.
If : cabin altitude > 10625 ft,
(or cabin altitude < -625 ft),
the needle does not move when the max. positions are reached but the cabin altitude digital value can vary up to:
32750 ft (or -9950 ft)

M. System in Control Indication SYS 1(2)

CAB PRESS Page - Display of the parameters: SYSTEM IN CTL and PACK FLOW CTL VALVE ** ON A/C NOT FOR ALL

(1) Case 1
SYS 1(2) is displayed in green, when the related system is in control and not faulty as transmitted by the CPC bus via the SDAC.

(2) Case 2
SYS 1(2) displayed in amber when:

system 1(2) is declared faulty (Cabin Pressure Controller 1 totally failed) by the Cabin Pressure Controller 1(2) bus via the SDAC.

(3) Case 3
SYS 1(2) is not displayed in all other cases.

(4) Case 1
SYS 1(2) is displayed in green, when the related system is in control and not faulty as transmitted by the CPC bus via the SDAC.

(5) Case 2
SYS 1(2) displayed in amber when:

system 1(2) is declared faulty (Cabin Pressure Controller 1 totally failed) by the Cabin Pressure Controller 1(2) bus via the SDAC.

(6) Case 3
Amber XX is displayed when SYS 1(2) failure or control indication is not valid
from SDAC.

(7) Case 4
SYS 1(2) is not displayed in all other cases.

N. Mode MAN Indication
MAN is displayed in green when the manual mode is engaged on the CABIN PRESS/MODE pushbutton switch, as transmitted by the SDAC.
Nothing is displayed in all other cases.

O. Safety Valves

CAB PRESS Page - Display of the parameters: LANDING ELEVATION and SAFETY VALVE ** ON A/C NOT FOR ALL

(1) Case 1:
SAFETY white and valve green:
When both safety valves are fully closed.

(2) Case 2:
SAFETY and valve amber:
When at least one of the safety valves is not fully closed.

(3) Case 3:
SAFETY white and XX amber:
When position of both safety valves is not available.
The safety valve positions are supplied by discrete signals from the Cabin Pressure Controller through the SDAC.

P. PACK 1(2) Indication

CAB PRESS Page - Display of the parameters: SYSTEM IN CTL and PACK FLOW CTL VALVE ** ON A/C NOT FOR ALL

(1) Case 1
Triangle green and PACK 1(2) white:
When the associated flow control valve is not fully closed (information from the SDAC).

(2) Case 2
Triangle and PACK 1(2) amber:
When the associated flow control valve is fully closed.

(3) Case 2
Triangle and PACK 1(2) amber:
When the associated flow control valve is fully closed and the engine core speed is at idle or above.

(4) Case 3
Triangle missing and PACK 1(2) white:
When the flow control valve position is not available.

(5) Case 3
Triangle replaced by amber XX and PACK 1(2) white:
When the flow control valve position is not available.

Q. Outflow Valve Control Indication

CAB PRESS Page - Display of the parameter: OUTFLOW VALVE POSITION ** ON A/C NOT FOR ALL

(1) Case 1
The needle of the outflow valve is normally green.

(2) Case 2
It becomes amber if the outflow valve opening is more than 95% and the A/C is in flight.

(3) Case 3
The needle goes out of view and is replaced by amber XX if the outflow valve position is not available.

R. Extract Valve

CAB PRESS Page - Display of the parameters: AIR EXTRACT VALVE and EXTRACT INDICATION ** ON A/C NOT FOR ALL

(1) Case 1:
Valve green and closed:
When the valve is normally fully closed.

(2) Case 2:
Valve amber and closed:
When the valve is abnormally fully closed.

(3) Case 3:
Valve green and open:
When the valve is normally fully open.

(4) Case 4:
valve amber and open:
When the valve is abnormally fully open.

(5) Case 5:
Valve partially open and green:
When the valve is normally partially open.

(6) Case 6:
Valve partially open and amber, the two conditions may apply:

When the valve status is found neither fully open nor fully closed nor partially open.
When the valve is found partially open and this status disagrees with that selected: the command is not in the partially open position.

(7) Case 7:
Valve replaced by XX amber: When the valve position is not available.

(8) Case 7:
Valve replaced by XX amber:
When the valve position is not available.
Also when the received status for the valve is inconsistent (status fully closed and fully open at the same time), or when none of the three valve status: fully closed, fully open, partially open, is received during a too long time (20s).

S. BLOWER Indication
BLOWER is amber when the status received from the SDAC is blower fan faulty. It is replaced by amber XX when the status from the SDAC is not valid. It is not displayed in the other cases.

T. VENT Indication
VENT is amber when these status received from the SDAC are blower faulty, or extract fan faulty, or avionics ventilation faulty It is white when the status from the SDAC is not valid, and also in the other cases.

U. EXTRACT Indication
EXTRACT is amber when the status received from the SDAC is extract fan faulty. It is replaced by amber XX when the status from the SDAC is not valid. It is not displayed in the other cases.

V. EXTRACT Indication

(1) Case 1
EXTRACT is normally white i.e when there is no avionic vent extract fault from both CPC as transmitted by the SDAC,
or when this FAULT status is not available from the SDAC.

(2) Case 2
EXTRACT is amber when there is an avionic vent extract fault from both CPC as transmitted by the SDAC.

W. VENT Indication
Item 11

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

VENT: Normally white i.e. there is neither avionic vent blower fault, or avionic vent extract fault, or avionic vent fault (discretes wired to the SDAC) or when these discretes status is not available from the SDAC.
It becomes amber when the avionic vent blower fault, or the avionic vent extract fault, or the avionic vent fault information is valid as transmitted by the SDAC.

Item 11

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

X. Air Inlet Valve position indication
Item 12

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

Item 12

CAB PRESS Page - Display of the parameters 1 to 13 ** ON A/C NOT FOR ALL

(1) Case 1

CAB PRESS Page - Display of the parameter: AIR INLET VALVE POSITION ** ON A/C NOT FOR ALL

Valve closed and green, when all the other following cases are not valid

(2) Case 2
Valve closed and amber, when the valve is abnormally closed on ground.

(3) Case 3
Valve open and green, when the air inlet valve is normally fully open

(4) Case 4
Valve open and amber, when the valve is abnormally open in flight.

(5) Case 5
Valve partially open and amber, when the valve is neither in the status fully open nor fully closed.

(6) Case 6
XX amber, when the valve status is not available, or when the conditions of case 5 last too long.

(7) Case 1

CAB PRESS Page - Display of the parameter: AIR INLET VALVE POSITION ** ON A/C NOT FOR ALL

Valve closed and green, when all the other following cases are not valid

(8) Case 2
Valve open and green, when the air inlet valve is normally fully open

(9) Case 3
Valve open and amber, when the valve is abnormally open in flight.

(10) Case 4
Valve partially open and amber, when the valve is neither in the status fully open nor fully closed.

(11) Case 5
XX amber, when the valve status is not available, or when the conditions of case 5 last too long.

** ON A/C NOT FOR ALL

2. COND Page
As shown in the following figure, the COND page includes all graphic symbols which are related to the air conditioning system.

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Part of the air conditioning data is also displayed on the CRUISE page with the zone temperatures (Ref. 31-67-00 where the CRUISE page is described).

The following parameters are displayed on the COND page:

Item 1: cockpit temperature
Item 2: cabin recirculation fan status (left)
Item 3: pack control mode
Item 4: cabin recirculation fan status (right)
Item 5: aft cabin temperature
Item 6: duct temperature
Item 7: zone trim air valve position
Item 8: hot air shutoff valve status
Item 9: aft cargo downstream isolation valve
Item 10: aft cargo temperature
Item 11: aft cargo duct temperature
Item 12: aft cargo hot air shutoff valve
Item 13: aft cargo trim air valve
Item 14: aft cargo upstream isolation valve
Item 16: forward cargo upstream isolation valve
Item 19: forward cargo downstream isolation valve

A. Zone Temperature

(1) Item 1: cockpit temperature

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Cockpit temperature and other zone temperature (fwd cabin, aft cabin: item 5)
Each temperature value is displayed in green, when it is correctly transmitted by the SDAC.
When the information is not correctly received, the value is replaced by amber XX.

(2) Item 1: cockpit temperature

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Cockpit temperature and other zone temperature (fwd cabin, aft cabin: item 5)
Each temperature value is displayed in green, when it is correctly transmitted by the SDAC.
Temperature value varies from -99 to 255 by step of 1°C.
When the information is not correctly received, the value is replaced by amber XX.

(3) Item 10: Aft cargo temperature

(4) Item 18: Fwd cargo temperature

B. Cabin Recirculation Fan Status
Items 2 and 4

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

The FAN indication is displayed in amber when the recirculation fan fault information is correctly received from the SDAC. When this information is not available, or when the fan is not faulty, the indication is not displayed.

C. Pack Control Mode
Item 3

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: PACK CTL MODE, DUCT TEMP., HOT AIR SHUTOFF VALVE ** ON A/C NOT FOR ALL

No data is displayed when the zone controller operates correctly and data from the SDAC is correctly received or when the Air Conditioning System Controller (ACSC) is installed.
Case 2
ALTN MODE is displayed in green when the zone controller is faulty.
Case 3
PACK REG is displayed in green when the zone controller is not valid and at least one SDAC is valid.

Item 3

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: PACK CTL MODE, DUCT TEMP., HOT AIR SHUTOFF VALVE ** ON A/C NOT FOR ALL

No data is displayed when the Air Conditioning System Controller (ACSC) operates correctly and data from the SDAC is correctly received.
Case 2
ALTN MODE is displayed in green when the ACSC is faulty.
Case 3
PACK REG is displayed in green when the ACSC is not valid and at least one SDAC is valid.

D. Duct Temperature
Item 6

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: PACK CTL MODE, DUCT TEMP., HOT AIR SHUTOFF VALVE ** ON A/C NOT FOR ALL

The duct temperatures are displayed in green when their value is below 80 deg.C and correctly received from the SDAC.

Case 2
The duct temperatures are displayed in amber when their value is above 80 deg.C and correctly received from the SDAC.

Case 3
The duct temperatures are replaced by amber XX when their value is not correctly received by the SDAC.

Item 6

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

The duct temperatures are displayed in green when their value is below 80 deg.C and correctly received from the SDAC.

Case 2
The duct temperatures are displayed in amber when their value is above 80 deg.C and correctly received from the SDAC.

Case 3
The duct temperatures are replaced by amber XX when their value is not correctly received by the SDAC.

The duct temperature value varies from -98 to 254 by step of 2°C.

E. Zone Trim Air Valve Position
Item 7

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Each zone trim air valve position is displayed in green, when the information is correctly received from the SDAC. When the position is not available the positions are replaced by amber XX.
The arrow is green while the scale is white. The two letters, C for Cold (valve fully closed) and H for Hot (valve fully open) are white.

F. Hot Air Shutoff Valve
Item 8

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: PACK CTL MODE, DUCT TEMP., HOT AIR SHUTOFF VALVE ** ON A/C NOT FOR ALL

Valve open and green
Normal case (all the following cases are not valid).

Case 2
Valve open and amber
When the valve is open and this position disagrees with that selected: closed.

Case 3
Valve closed and green
When the valve is fully closed and its position does not disagree with that selected: closed.

Case 4
Valve closed and amber
When the valve is abnormally closed (the valve is fully closed and this position disagrees with that selected: open) or the related HOT AIR pushbutton switch is pushed (the OFF legend is on).

Case 5
Valve status replaced by amber XX
When the valve status is not available from the SDAC and FWC.

Item 8

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1
Valve open and green
When the valve is fully open and its position agrees with the selected position: Open.

Case 2
Valve open and amber
When the valve is unusually open (the valve is open and this position disagrees with the selected position: Closed).

Case 3
Valve closed and green
When the valve is fully closed and its position agrees with the selected position: Closed.

Case 4
Valve closed and amber when:
- The valve is fully closed, or
- On air conditioning panel 30VU the HOT AIR pushbutton switch is released (OFF legend on), or
- There is no hot air flow.

Case 5
Valve status replaced by amber XX
When the valve status is not available from the SDAC and the Flight Warning Computer (FWC).

G. Aft Cargo Downstream Isolation Valve
item 9

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: AFT CARGO UPSTREAM ISOL VALVE, HOT AIR SHUTOFF VALVE, DOWNSTREAM ISOL VALVE ** ON A/C NOT FOR ALL

Valve open and green
When the valve is not fully closed as transmitted by the SDAC.

Case 2
Valve closed and amber
When the valve is fully closed as transmitted by the SDAC.

Case 3
Valve position replaced by amber XX
When the valve status is not available from the SDAC.

H. Aft Cargo Duct Temperature
Item 11

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Refer to the cabin duct temperature, where the same principles apply. (item 6)

I. Aft Cargo Hot Air Shutoff Valve
Item 12

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the Parameters: AFT CARGO UPSTREAM ISOL VALVE, HOT AIR SHUTOFF VALVE, DOWNSTREAM ISOL VALVE ** ON A/C NOT FOR ALL

Valve open and green
Normal case when all other cases are not valid

Case 2
Valve open and amber, when the valve is abnormally open.

Case 3
Valve closed and green
When the valve is normally fully closed

Case 4
Valve closed and amber
When the valve is fully closed and the HOT AIR pushbutton switch is pushed (the OFF legend is on).

Case 5
Valve replaced by amber XX
When the valve status is not available from the SDAC.

J. Aft Cargo Trim Air Valve
Item 13

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Refer to the cabin trim air valve, as the same principles apply.

K. Aft Cargo Upstream Isolation Valve
Item 14
Case 1

COND Page - Display of the Parameters: AFT CARGO UPSTREAM ISOL VALVE, HOT AIR SHUTOFF VALVE, DOWNSTREAM ISOL VALVE ** ON A/C NOT FOR ALL

Valve open and green
Normal case when the valve is not fully closed as transmitted by the SDAC.

Case 2
Valve closed and amber
When the valve is fully closed as transmitted by the SDAC.

Case 3
Valve replaced by amber XX
When the valve status is not available.

L. Fwd cargo upstream isolation valve
Item 16
Case 1

COND Page - Display of the parameters: FWD CARGO UPSTREAM ISOL VALVE, DOWNSTREAM ISOL VALVE ** ON A/C NOT FOR ALL

M. Fwd cargo duct temperature
Item 17

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Refer to the cabin duct temperature as the same principles apply.

N. Fwd cargo temperature
Item 18

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Refer to the cabin temperature as the same principles apply.

O. Fwd cargo downstream isolation valve
Item 19

COND Page - Display of the Parameters ** ON A/C NOT FOR ALL

Case 1

COND Page - Display of the parameters: FWD CARGO UPSTREAM ISOL VALVE, DOWNSTREAM ISOL VALVE ** ON A/C NOT FOR ALL

Valve open and green
When the valve is not fully closed, as transmitted by the SDAC.

Case 2
Valve closed and amber
When the valve is fully closed, as transmitted by the SDAC.

Case 3
Valve replaced by amber XX
When the valve status is not available.

[Rev.10 from 2021] 2026.04.01 00:38:40 UTC