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 -Valves are fitted with position microswitches for monitoring.
 -An exchanger outlet temperature sensor monitors the precooler outlet temperature.
 -Two pressure transducers monitor the air pressure available in circuit.
 (1)
 The two BMCs monitor the electrical signals from the microswitches of the valves, the temperature at the precooler outlet, the transferred and the regulated pressures. Additionally, they monitor ambient overheat in pylons, wings and the fuselage (Ref. 36-22-00).

 (2)
 The two BMCs transmit data through the SDAC to the ECAM system which generates the indications on the system page. The indications are : pressure, temperature and position of the main valves (PRV, HP Bleed Valve , CROSSBLEED and APU BLEED valve). The two BMCs signal directly to the AIR COND overhead control panel the ENG 1 (2) BLEED FAULT signal.

 (3)
 The two BMCs trigger a warning in case of :
 - overpressure/low pressure
 - overtemperature/low temperature

 -ambient overheat.

 (4)
 The two BMCs control the closure of the PRV (during warning, engine start, APU bleed) automatic mode of CROSSBLEED valve and APU bleed valve opening availability.

 (5)
 The two BMCs monitor the correct operation of the whole system and detect abnormal function of an item. They send this data to the Centralized Fault Display System (CFDS) (Maintenance Computer).

 

 NOTE : All the class 1, 2 and 3 maintenance messages transmitted from
____ the two BMCs are listed in the INDEX of the TSM.
 7. BMC Parameter List__________________
 A. Data Bus from EIU
 (1) Discrete word
 ----------------------------------------------------------------------------| KEY: (e) | | SDI = 01 or 11 from EIU1 | | SDI = 10 or 00 from EIU2 | |--------------------------------------------------------------------------| | LABEL | SDI | BIT | REFRESH | PARAMETER |STATUS 0|STATUS 1| COMMENTS | | | | | RATE (ms) | DEFINITION | | | | |-------|-----|-----|-----------|------------|--------|--------|-----------| | 270 | (e) | 13 | 250 max | ENGINE |CLOSED | NOT |USED BLEED | | | | | | STARTER | |CLOSED |PRESSURE | | | | | | VALVE | | |REGULATOR | | | | | | POSITION | | |VALVE FOR | | | | | | | | |CONTROL | ----------------------------------------------------------------------------

 ----------------------------------------------------------------------------
| KEY: | | SDI = 01 from EIU1 | | SDI = 10 from EIU2 | |--------------------------------------------------------------------------| | LABEL | BIT | REFRESH | PARAMETER | STATUS 0|STATUS 1| COMMENTS | | | | RATE (ms)| DEFINITION | | | | |-------|-------|----------|---------------|---------|--------|------------|
 |  |  11  |  | OIL LOW PRESS |  |DETECTED|  |
 |  |  |  |  |  |(Eng  |  |
 |  |  |  |  |  | Not  |  |
 |  |  |  |  |  |Running)|  |
 |  032 |------ -| 125  max  |---------------|------- --|--------|------------|
 |  |  13  |  |VALVE CLOSURE  |  |  |FOR CROSS- |
 |  |  |  |For ENG START  |  NO  |  YES  |BLEED VALVE |
 |  |  |  |  DEMAND  |  |  |CTL AND APU |
 |  |  |  |  |  |  |ENABLE  |

 | |-------|----------|---------------|---------|--------|------------| | | 19 | | CFM 56 FAMILY | |SELECTED| | |--------------------------------------------------------------------------| | | 17 | | LH MAIN | |COMPRES-| | | | | | LANDING GEAR | |SED | | | | | | | | | USED FOR | | | | | | | | TEST | | | | 80 max | | | | INHIBITION | | 031 |-------| |---------------|---------|--------| AND | | | 18 | |RH MAIN | |COMPRES-| LOW TEMP | | | | |LANDING GEAR | |SED | | | | | | | | | | | | | | | | | | | |-------| |---------------|---------|--------|------------| | | 29 | | WAI P/B | | OFF | LOW TEMP | | | | | | |SELECTED| | ----------------------------------------------------------------------------

 B. Data Bus from EIU

 (1) Numerical word

 ----------------------------------------------------------------------------| KEY: (e) (k) | | SDI = 01 or 11 from EIU1 SDI = 01 from EIU1 | | SDI = 10 or 00 from EIU2 SDI = 10 from EIU2 | |--------------------------------------------------------------------------| |LABEL|SDI|PARAMETER|BINARY| REFRESH |NUMBER OF|OPERATING|RESOLUTION| UNIT | | | | DEFINI- |RANGE | RATE |SIGNIFI- |RANGE |(approx) | | | | | TION | | (ms) |CANT BITS|Min/Max | | | |-----|---|---------|------|---------|---------|---------|----------|------| | 114 | | PO | 32 | 250 max | 14 | 2/20 | 0,002 | | |-----|(e)|---------------------------------------------------------| PSIA | | 264 | | PS3 | 512 | 125 max | 14 | 2/450 | 0,03 | | |-----|---|---------|------|---------|---------|---------|----------|------| | 316 |(k)| OIL TEMP|2048 | 125 max | 12 | -60 to | 0,5 | .C | | | | | | | | +250 | | | -------------------------------------------------------------------------|
　
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