FIRE SYS FAULT
(Advisory)

The cyan 'FIRE SYS FAULT' advisory CAS message indicates the FIREX CU has detected a fault.

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Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

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1. Interrogate the MDC as follows:

   1. On the cursor control panel, ensure the toggle switch is to the right and select Anti-Ice, ECS and Fuel buttons simultaneously. The MDC main menu should now be displayed on Display Unit #3.
   2. Using the joystick, select Current Faults (if the fault is active) or Aircraft History to research stored faults. From Aircraft History you can then select Fault Message History and locate the Firex system. Going into advanced diagnostics will provide an equation id for the fault identified.
   3. Select the MDC fault or equation from the drop down below to provide additional information to assist in troubleshooting.
      Select an MDC Fault Code/Message:B3-006710 - PIT SIGNAL MISCOMP [FIREX PIT SW]B3-006711 - PIT SIGNAL STUCK ON [FIREX PIT SW]B3-006747 - INTERNAL FAULT [FIREX CTRL UNIT]B3-006748 - NO POWER FROM CB5-A3 [FIREX CTRL UNIT]B3-006749 - NO POWER FROM CB6-A4 [FIREX CTRL UNIT]B3-006750 - NO POWER FROM CB2-A11 [FIREX CTRL UNIT]B3-006751 - FIRE WARN O/P DISCRETE [FIREX CTRL UNIT]B3-006752 - O/P DISCRETE-FIREX BTL 1 [FIREX CTRL UNIT]B3-006753 - O/P DISCRETE-FIREX BTL 2 [FIREX CTRL UNIT]B3-006754 - O/P DISCRETE-SMOKE DET [FIREX CTRL UNIT]B3-008131 - SHORT CIRCUIT [APU FIRE LOOP A]B3-008132 - OPEN CIRCUIT [APU FIRE LOOP A]B3-008133 - SHORT CIRCUIT [APU FIRE LOOP B]B3-008134 - OPEN CIRCUIT [APU FIRE LOOP B]B3-008135 - CROSSWIRED LOOPS [APU FIRE LOOPS]B3-008141 - SHORT CIRCUIT [L ENG FIRE LOOP A]B3-008142 - OPEN CIRCUIT [L ENG FIRE LOOP A]B3-008143 - SHORT CIRCUIT [R ENG FIRE LOOP A]B3-008144 - OPEN CIRCUIT [R ENG FIRE LOOP A]B3-008145 - SHORT CIRCUIT [L ENG FIRE LOOP B]B3-008146 - OPEN CIRCUIT [L ENG FIRE LOOP B]B3-008147 - SHORT CIRCUIT [R ENG FIRE LOOP B]B3-008148 - OPEN CIRCUIT [R ENG FIRE LOOP B]B3-008149 - CROSSWIRED LOOPS [L ENG FIRE LOOPS]B3-008150 - CROSSWIRED LOOPS [R ENG FIRE LOOPS]