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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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04/26/24

Message Overview:

EVS HEAT FAIL
(Caution)

DDG Reference: 30-40-02
Pilot Action (QRH): ABNORM 12-8
System Description: 34-33-00
Schematic Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] 34-32-00-101 Head-Up Flight Display System 
[ Global Express ]  [ G5000 ]  [ Global XRS ] 24-51-00 AC Load Distribution AC Power Center (ACPC) System
[ Global Express ]  [ G5000 ]  [ Global XRS ] 24-52-00 AC Load Distribution Cockpit Circuit Breaker Panel (CCBP) System
Wiring Diagram: [ Global Express ]  [ G5000 ]  [ Global XRS ] 34-32-05-1 Optical Projector Unit
[ Global Express ]  [ G5000 ]  [ Global XRS ] 24-51-00 ACPC Distribution Left
[ Global Express ]  [ G5000 ]  [ Global XRS ] 24-51-00 ACPC Distribution Right
[ Global Express ]  [ G5000 ]  [ Global XRS ] 24-52-01 Cockpit Circuit Breaker Panel (CCBP)

Message Description:

The Infrared Window (IRW) and/or fairing is not heated. There is a loss of heater control. The Enhanced Vision System (EVS) image may become degraded.

Possible Causes:

  • Enhanced Vision System Heater Controller (EVSHC) (A315)
  • Infrared Window (IRW) (A320)
  • Enhanced Vision System (EVS) Fairing (HR30)
  • Secondary Power Distribution Assembly (SPDA) 3 (A15)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-34-0460 - Enhanced Vision System Heater Controller (EVSHC) nuisance fault on power-up
  • AW700-45-0065 - CAIMS Nuisance Fault Messages

Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM):

NOTES:

  • Verify C/B status on both pilot and copilot EMS CDUs. This CAS Message will post if either of the following circuit breaker or Smart Contactor status is OUT or Tripped.

LOCATION CB NO. NAME
CCBP (A54) CB-G3 EVS FAIRING HEAT
CCBP(A54) CB-H5 EVS WINDOW HEAT
ACPC (A35) SC-K15 AC 1 FEED

Quick Links:

Removal of the Enhanced Vision System (EVS) Heater Controller AMM 34-33-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Enhanced Vision System (EVS) Heater Controller AMM 34-33-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Enhanced Vision System (EVS) Infrared Window (IRW) AMM 34-33-06-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Enhanced Vision System (EVS) Infrared Window IRW) AMM 34-33-06-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Enhanced Vision System (EVS) Sensor Fairing AMM 53-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Enhanced Vision System (EVS) Sensor Fairing AMM 53-62-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to Active Faults AMM 45-47-00-970-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Check status of AC 1 FEED on EMS CDU, the AC 1 Feed being out or tripped can drive multiple CAS to post.
    BUS > AC 1 > AC 1 FEED.

    1. If AC 1 FEED CB is IN go to step 3.
    2. If AC 1 FEED CB is OUT, set to IN.

      3. AC 1 FEED
      CB SYSTEM PHASE CAS
      CB-G6 ESS TRU 1 3 AC BUS 1 FAIL (Caution)
      CB-G3 EVS FAIRING HEAT 3 EVS HEAT FAIL (Caution)
      CB-G9 SLAT/FLAP PWR 1 3 SLAT-FLAP HALFSPD (Advisory)
      CB-H5 EVS WINDOW HEAT 1 EVS HEAT FAIL (Caution)
      CB-H6 A/T CTLR 1 A/T 1 FAIL (Advisory)
      A/T 2 FAIL (Advisory)
      CB-H7 PITOT 1 HT A 1 PITOT 1 HT FAIL (Caution)
      CB-H8 R ICE DETECTOR 1 ICE DETECTOR FAULT (Advisory)
      CB-H9 R AOA HEAT A 1 R AOA HEAT FAIL (Caution)
      CB-H10 L WSHLD HEAT 1 1 L WSHLD HEAT FAIL (Caution)
      CB-H11 L WSHLD HEAT 2 1 L WSHLD HEAT FAIL (Caution)
      CB-G12 TRU BAY FAN 3 ELEC SYS FAULT (Advisory)
      CB-B6 STAB TRIM CH1 3 STAB CH 1 FAIL (Advisory)

  2. Did the CAIMS Fault & CAS messages clear after setting AC 1 FEED CB to IN.

    1. If YES, do close out.
    2. If NO, go to next step.

  3. Access CAIMS Active Faults.
  4. Select related CAIMS message from the menu below:
  5. If no CAIMS messages are available, continue with next step.
  6. On the EMS CDU, make sure the "EVS HEAT CTRL" circuit breaker is set to "IN". If YES, momentarily set it to "OUT" and reset it back to "IN". Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, do close out.

  7. Disconnect EVSHC connector A315P1. Power up the A/C and do a 28 VDC voltage check as follows:

    From To Result
    A315P1-L A315P1-K

    1. If there is 28 VDC, continue with next step.
    2. If there is no 28 VDC, perform wiring checks between the EVSHC and SPDA3 A15P3 pin L. If wiring good, investigate SPDA3.

  8. Perform wiring checks between the EVS Heater Controller (EVSHC) and the EVS Fairing and EVS Window using the EVSHC Troubleshooting Table.
  9. Do a wiring check of the wiring interface between the EVSHC and DAU 2.
  10. Replace EVSHC.
  11. Do close out.

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