Message Name:

OUT OF RANGE

Message Code:

B3-006403

Associated CAS:

AIR COND FAULT
(Advisory)

The CABIN TEMPERATURE TRIMMER located in the cabin is detected failed.

NOTE: The term "TRIMMER" refers to the Cabin temperature control interface. IASC 1 is connected to a potentiometer controlled via the passenger control Interface. The potentiometer is located inside Ethernet interface Unit 2 (EIU 2). Refer to your supplemental wiring manual for wiring detail.

• Integrated Air System Controller 1 (IASC1) (A55)
• Ethernet Interface Unit 2 (EIU2)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

1. Message# = 1
2. Fault Logged = AIR,TAXI
3. Status = FAILED/WIRING
4. Timer = 5
5. Logic = IAS1A-55
6. {Term Definitions}

   1. IAS1A-55 XX 353 00 EXCT XXXX-XXXX XXXT-XXXX XXXX-XXXX 353A:21; CABIN TRIM SELECTOR FAIL

1. Swap IASC #1 with IASC #2. Is the fault still present?

   1. If YES, continue with next step.
   2. If NO, replace defective IASC and do close out.

2. Perform wiring checks between IASC 1 and EIU 2. Refer to your Supplemental wiring manual for interface wiring details.

   1. If wiring checks are good, continue with next step.
   2. If defects are found, repair defective wiring as required.

3. Swap EIU 2 with EIU 1 for fault confirmation. Replace defective unit if required.
4. Do close out.