Fault Message:

[ACSC1-B] LH PRESS XDCR POWER /WRG

Fault Code:

2162429ECS

Associated CAS:

L PACK FAULT
(Advisory)

A loss of the power source for the Pressure Transducers has been detected by Air Conditioning System Controller (ACSC) 1.

• Secondary Power Distribution Assembly (SPDA) 2 (A14)
• Junction Box (JB5)
• Air-Conditioning System Controller (ACSC) 1 (A87)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active (Global Express / XRS - 9002 to 9312, 9314 to 9380, 9384 to 9429 and Global 5000 - 9127 to 9383, 9389 to 9400, 9404 to 9431 and 9998)

Forum Articles/Infoservice/Newsletter: None

1. Swap SPDA 2 with SPDA 4.

   1. If the system checks are good, replace SPDA 2 and do close out.
   2. If the fault remains, continue with next step.
      NOTE 1: If SPDA 3 has been swapped with SPDA 4 a fault may have been transferred to another system on SPDA 2 ref Build 4 load lists with Pinout.xls).
      NOTE 2: When swapping SPDAs, it is possible to lose your DC cabin feeds. Check the EMS-CDU Switch Control Page 3 under SYSTEM - CNTL button. First page is AC feeds 2nd and 3rd are DC feeds that will toggle off.

2. Swap ACSC 1 with ACSC 2.

   1. If the system checks are good, replace ACSC 1 and do close out.
   2. If the fault remains, continue with next step.

3. Remove JB5 and perform wiring checks of all wiring / circuit involved with the sensors power source (ref: Wiring Diagram: 21-51-00 Sheet 1 of 3 Page 1).

   1. If the wiring checks are not good, repair the defective associated wiring and do close out.
   2. If the wiring checks are good, continue with next step.

4. Perform continuity check of JB5.

   1. If there is continuity, repair the defective associated wiring as required and do close out.
   2. If there is no continuity, continue with next step.

5. Replace JB5.
6. Do close out.