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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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06/13/19

Message Overview:

Fault Message:

[ACSC2-B] CKPT VENT TEMP SENS /WRG

Fault Code:

2164419ECS

Associated CAS:

R PACK FAULT
(Advisory)

Reporting LRU: Air Conditioning System Controller (ACSC) 2
System Description: 21-60-00
Schematic Diagram: 21-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-21-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Cockpit Ventilated Temperature Sensor has been detected out of range by Air-Conditioning System Controller (ACSC) 2 Channel B.

Possible Causes:

  • Cockpit Ventilated Temperature Sensor (B20)
  • Air-Conditioning System Controller (ACSC) 2 (A88)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active

Forum Articles/Infoservice/Newsletter: None

Airborne dust from the carpet and the air inside the aircraft often builds up inside the Ventilated Temperature Sensors. Cleaning all three ventilated sensors regularly will prevent failures. Use a small paint brush, and a light Vacuum.

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 Ventilated Temperature Sensors AMM 21-60-25-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Ventilated Temperature Sensors AMM 21-60-25-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Clean Cockpit Ventilated Temperature Sensor.
  2. Visually verify that the internal fan inside the sensor is turning, and no dust is present inside the unit.
  3. Verify power (28 VDC) at B20P1-1 and ground at B20P1-2.
  4. Swap Cockpit Vent Temperature Sensor, with Aft or Fwd sensor.

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

  5. Perform a wiring check between Cockpit Vent Temperature Sensor and ACSC 2, and Cockpit Ventilated Temp Sensor and Ground.

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

  6. Replace ACSC 2.
  7. Do close out.

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