Message Name:

DCPC DIODE #2-D2 FAILED

Message Code:

2460447DCP

Associated CAS:

ELEC SYS FAULT
(Advisory)

DC Power Center (DCPC) does not sense the voltage from the Diode D2.

• DC Power Center (DCPC) (A63)
• DC Power Center (DCPC) Diode (D2)
• Electronic Module (EM3)
• DC ESS Feeder Card
• Associate Wiring

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

1. With aircraft on Batteries power only; access DC ELEC synoptic page and check the status (color) of the race track around DC ESS BUS (Take a picture for future reference.)

   1. If green, replace the SSPC 2 (K8) contactor and do close out.
   2. If amber or empty, continue with next steps.

2. Interchange DC ESS feeder card with DC 1 feeder card. Does the fault follow the card?

   1. If YES, replace the DC ESS feeder card and do close out.
   2. If NO, continue with next step.

3. Remove DC ESS Feeder card in DCPC. Disconnect EM3 connector P305. Perform a resistance check for a short circuit as follows:

   From	To	Result
   P305-6	P305-12

   1. If there is a short circuit, replace D2 and do close out.
   2. If there is no short circuit, continue with next step.

4. Perform a resistance check as follows:

   From	To	Result
   P305-7	Ground
   P305-11	Ground

   1. If there is continuity, go to step 9.(Make sure the resistance values are reported on return form)
   2. If there is no continuity, continue with next step.

5. Perform a continuity check as follows:

   From	To	Result
   P305-7	P331A-7
   P305-11	P331A-10

   1. If there is continuity, continue with next step.
   2. If there is no continuity, go to step 9.

6. Perform a resistance check on EM 3 as follows:

   From	To	Value	Result
   J305-5	J305-6	562 Ω
   J305-6	J305-7	24 KΩ
   J305-12	J305-11	10 KΩ

   1. If the resistance values are incorrect, replace EM 3 and do close out.
   2. If the resistance values are correct, continue with next step.

7. Perform a continuity check as follows:

   From	To	Result
   P305-6	D2-Anode

   1. If there is no continuity, go to step 9.
   2. If there is continuity, continue with next step.

8. Perform a continuity check between and diode.

   From	To	Result
   P305-12	D2-Cathode

   1. If there is no continuity, go to step 9.
   2. If there is continuity, continue with next step.

9. Replace Diode D2. Is the fault resolved?

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

10. Replace DCPC.
11. Do close out.