background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults by MDCBy Tips

Select color for CAS message that you wish to troubleshoot

(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

10/29/24

Message Overview:

Message Name:

DISAGREE / VALVE OPEN

Message Code:

B3-361644

Associated CAS:

AIR COND FAULT
(Advisory)

Reporting LRU: TEMP CTRL VLV
System Description: 21-52-00 - Air Conditioning System
Schematic Diagram: 21-52-00 - Air Conditioning System
Wiring Diagram: 21-51-09 - Flow Control Valve

Message Description:

Primary or backup mode of control of the TEMPERATURE CONTROL VALVE control has been detected failed in open position.

Possible Causes:

  • Temperature Control Valve (MPE07)
  • Integrated Air System Controller (IASC1) (A55)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

  • Check for a loose connector on the Temperature Control Valve (MPE07).

Quick Links:

Removal of the Integrated Air System (IAS) Controller AMM 21-31-01-000-801
Installation of the Integrated Air System (IAS) Controller AMM 21-31-01-400-801
Operational Test of the Integrated Air System (IAS) Controller AMM 21-31-01-710-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Repair Wiring SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do Wiring Check as follows.

    From
    Temp Control Valve    		 To
    IASC 1    		 Result
    MPE07P1-4 A55P3-58
    MPE07P1-3 A55P3-59
    MPE07P1-2 A55P3-64
    MPE07P1-1 A55P3-65
    MPE07P1-7 A55P1-60
    MPE07P1-8 A55P1-73
    MPE07P1-13 GS4178
    MPE07P1-SH A55P3-SH

  2. Are the results satisfactory?

    1. If YES, continue with the next step.
    2. If NO, repair wiring as required and do the close out.

  3. Interchange the IASC 1 (A55) with IASC 2 (A56).
  4. Are the results satisfactory?

    1. If YES, replace the IASC 1 (A55) and do the close out.
    2. If NO, continue with the next step.

  5. Replace the Temp Control Valve (MPE07).
  6. Do the close out.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.