FIRE BTL2 LO PRESS
(Caution)

Fire extinguisher bottle #2 pressure is below 250 ±25 psig.

• Fire extinguisher bottle 2 pressure is low.
• Fire Extinguisher Bottle 2 Pressure Switch
• Fire Detection and Extinguishing (FIDEEX) Control Unit (CU)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: If the Fire Bottle was completely discharged with no activation of the Fire Handle, refer to this Observed Fault.

1. Using the PMAT, access CAIMS to view active or stored faults. Select displayed message from menu below:
   - Select Message -261002EWK - BOTTLE 2 LOW PRESSURE /WRG

   1. If no message is displayed, continue with next step.

2. Check the gauge pressure indication on the FIREX bottle.

   1. If gauge shows an indication of 250 ±25 psi (1724 ±172 Pa) or less, go to step 4.
   2. If not, continue with next step.

3. Disconnect Fire Extinguisher Container connector A112P4 and FIDEEX control unit connector A106P2. Perform a continuity check as follows:
   

   From	To	Expected Result	Result
   A112P4-3	Ground	Open
   A112P4-2	Ground	Open
   A112P4-3	A106P2-50	Continuity
   A112P4-2	A106P2-40	Continuity

   1. If wiring defects are found, repair defective associated wiring as required and do close out.
   2. If wiring checks are good, continue with next step.

4. Replace the Fire Extinguisher Container. Is the fault still present?

   1. If YES, continue with next step.
   2. If NO, do close out.

5. Replace the FIDEEX control unit.
6. Do close out.