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(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.

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Quick Links

06/10/19

Message Overview:

Fault Message:

[ACSC1-B] LH PNEU THERMO CMD /THC

Fault Code:

2162421ECS

Associated CAS:

L PACK AUTO FAIL
(Caution)

Reporting LRU: Air Conditioning System Controller (ACSC) 1
System Description: 21-52-00
Schematic Diagram: 21-52-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-51-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Air Conditioning System Controller (ACSC) 1 has detected a failure with the Left Pneumatic Temperature Thermostat (THC).

Possible Causes:

  • Air Conditioning System Controller (ACSC) 1 (A87)
  • Pneumatic Temperature Thermostat (THC) 1 (S8)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Air-Conditioning System Controllers AMM 21-60-21-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Air-Conditioning System Controllers AMM 21-60-21-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Temperature Control Thermostat AMM 36-11-21-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Temperature Control Thermostat AMM 36-11-21-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap THC 1 with THC 2.

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

  2. Perform wiring check between ACSC 1 and left THC.

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

  3. Replace ACSC 1.
  4. Do close out.

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