09/11/25
Message Overview:
Message Name:
[ACSC1-B] LH PCK IN TEMP SENS /WRG
Message Code:
2162425ECS
Associated CAS:
| Reporting LRU: | Air Conditioning System Controller (ACSC) 1 |
| System Description: | 21-51-00 - Filtering and Flow Control System |
| Schematic Diagram: | [ Global Express ] [ G5000 ] [ Global XRS ] 21-51-00 - Air Conditioning Filtering And Flow Control System - Electrical Schematic |
| Wiring Diagram: | [ Global Express ] [ G5000 ] [ Global XRS ] 21-51-01 - Filtering And Flow Control System - Control Sensing Left |
Message Description:
Left Pack Inlet Temperature Sensor has been detected out of range by Air Conditioning Controller (ACSC) 1 Channel B.
Possible Causes:
- Pack Inlet Temperature Sensor (PITS) 1 (E23)
- Air Conditioning System Controller (ACSC) 1 (A87)
- Temperature Control Thermostat (THC) Filter
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active
Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM): None
Quick Links:
| Standard Aircraft Configuration for Maintenance | [ G5000 ] [ Global Express ] [ Global XRS ] AMM12-00-00-867-801 |
| Removal of the Pack Inlet Temperature-Sensors | [ G5000 ] [ Global Express ] [ Global XRS ] AMM21-51-21-000-801 |
| Installation of the Pack Inlet Temperature-Sensors | [ G5000 ] [ Global Express ] [ Global XRS ] AMM21-51-21-400-801 |
| Removal of the Air-Conditioning System Controllers | [ G5000 ] [ Global Express ] [ Global XRS ] AMM21-60-21-000-801 |
| Installation of the Air-Conditioning System Controllers | [ G5000 ] [ Global Express ] [ Global XRS ] AMM21-60-21-400-801 |
| Connect Electrical Power to the Aircraft | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-861-801 |
| Electrical/Electronic Safety Precautions | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-910-801 |
| Electrostatic Discharge Safety Precautions | [ G5000 ] [ Global Express ] [ Global XRS ] AMM24-00-00-910-802 |
| Removal of the Temperature Control Thermostat Filter | [ G5000 ] [ Global Express ] [ Global XRS ] AMM36-11-21-000-802 |
| Installation of the Temperature Control Thermostat Filter | [ G5000 ] [ Global Express ] [ Global XRS ] AMM36-11-21-400-802 |
| Discard of the Pneumatic Temperature Thermostat (THC) Filter | [ G5000 ] [ Global Express ] [ Global XRS ] AMM36-11-21-961-801 |
Troubleshooting Recommendations:
- Use the PMAT to access CAIMS System Diagnostics. Select ATA 21 > ASCS 1A (1B, 2A, 2B) > LRU TEST > PACK TEMP. SENSOR DATA. Record sensor data using the ECS data table. Compare values between channels and sides.
NOTE: Best results are obtained if Air Conditioning system components are allowed to reach ambient temperature.- If only one channel has out of range values, go to step 3.
- If both channels of the same ACSC have out of range values, continue with next step.
- Swap Pack Inlet Temp Sensors (PITS). Is the fault still present on the same side?
- If YES, continue with next step.
- If NO, replace defective PITS and do close out.
- Perform wiring checks between Pack Inlet Temperature Sensor connector (E23P1) and ACSC 1 connector (A87P2).
- If wiring defects are found, repair defective wiring and do close out.
- If no defects are found, continue with next step.
- Swap ACSC 1 with ACSC 2 to confirm faulty unit and do close out.
- Do close out.