DOC AIRBUS | TSM A320FMain Start-Contactor Fault (APS 3200)
TASK 49-40-00-810-805-A
Main Start-Contactor Fault (APS 3200)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 49-40-00-710-058-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 49-40-00-810-054-B ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:39 UTC
Main Start-Contactor Fault (APS 3200)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 2052210 | |
| ESPM 2053210 | |
| AMM 49-00-00-710-008 | Operational Test of the APU |
| ASM 494201 | |
| AMM 49-42-51-000-007 | Removal of the Starter Motor (APS 3200) |
| AMM 49-42-51-400-007 | Installation of the Starter Motor (APS 3200) |
| AMM 49-42-55-000-001 | Removal of the Start Contactors |
| AMM 49-42-55-400-001 | Installation of the Start Contactors |
Subtask 49-40-00-710-058-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 49-40-00-810-054-B ** ON A/C NOT FOR ALL
A. If the APU Class 3 Faults Page gives the maintenance message:
CONTACTOR (5KA):
Fault Code Number: 129
(1) Replace the CONTACTOR-MAIN START [5KA] AMM 49-42-55-000-001 and AMM 49-42-55-400-001.
(2) If the fault continues:
Subtask 49-40-00-710-059-B ** ON A/C NOT FOR ALL CONTACTOR (5KA):
Fault Code Number: 129
(1) Replace the CONTACTOR-MAIN START [5KA] AMM 49-42-55-000-001 and AMM 49-42-55-400-001.
(2) If the fault continues:
- Check the wiring from the CONTACTOR-MAIN START (5KA) to the MOTOR-STARTER (8KA) for an open circuit and repair if necessary.
- do a check and repair the wiring from the ECB (59KD) AB/J10 to the positive electrical connection of the Starter Motor (8KA) ESPM 2052210 ESPM 2053210 ASM 494201.
- replace the MOTOR-STARTER [8KA] AMM 49-42-51-000-007 and AMM 49-42-51-400-007.
B. Do the test given in Para. 3.