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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

06/12/19

Message Overview:

Fault Message:

HCU PIN PROGRAMMING INVALID

Fault Code:

2163618ECS

Associated CAS:

HUMIDIFIER FAIL
(Advisory)

Reporting LRU: Air-Conditioning System Controller (ACSC) 2
System Description: 21-71-00
Schematic Diagram: 21-71-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-71-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Air-Conditioning System Controller (ACSC) 2 does not recognize the pin programming for the Humidifier option.

Possible Causes:

  • Ground Stud (GS257)
  • Air-Conditioning System Controller (ACSC) 2 (A88)
  • 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 ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform a wiring check between ACSC2 A88P1-10 and GS257.

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

  2. Make sure GS257 is properly installed.
  3. Replace ACSC2.
  4. Do close out.

NOTE: Perform Functional Test of the Humidifier System to confirm the system integrity. This task is the approved Return to Service (RTS) Test for the Humidifier System.

If the operator which to operate the humidifier on the ground as it operates in flight, then use the following attached procedure. Please note that the attached procedure is not approved for RTS and can only be used for troubleshooting purpose. Please note that the 3.5 hours delay can not be bypassed in this procedure.

Humidifier Operation with Aircraft W off W (3.5 hours delay activation).

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