Fault Message:

DCPC FAN FAILED

Fault Code:

2460462DCP

Associated CAS:

ELEC SYS FAULT
(Advisory)

DC Power Center (DCPC) "DC Power Quality Monitor (DCPQM) 2" does not sense rotation of the DCPC Fan.

• DC Power Center (DCPC) Fan
• DC Power Center (DCPC) (A63)
• DC Power Quality Monitor (DCPQM) Card 2
• Electrical Module (EM5)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-24-0252 - “ELEC SYS FAULT” and or “ELEC SYS FAIL” - Nuisance CAS Message during Power Up.

Forum Articles/Infoservice/Newsletter: None

1. Access DCPC to perform visual inspection of cooling fan assy. Ensure DCPC FAN connector P503 is connected properly.
2. Select the Battery Master Switch to ON and check status of fan.

   1. If fan is not rotating, continue with next step.
   2. If fan is rotating, go to step 8.

3. Check for 28 VDC between DCPC FAN connector and ground as follows:

   From	To	Result
   P503-A	Ground

   1. If voltage are good, go to step 5.
   2. If no 28 Volts, continue with next step.

4. Replace EM 5.

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

5. Perform wiring checks between DCPC FAN connector and ground as follow:

   From	To	Status	Result
   P503-B	Ground	closed circuit
   P503-C	Ground	open circuit

   1. If wiring check result is same as status in table above, go to step 7.
   2. If wiring check result is not same as status in table above, continue with next step.

6. Replace DCPC.

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

7. Replace DCPC fan.

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

8. Replace DCPQM 2.
9. Do close out.