W DOC AIRBUS | TSM A320F

APU AUTO SHUTDOWN - NO ACCELERATION, Flow-Divider Solenoid Fault (131-9(A))

TASK 49-00-81-810-841-A
APU AUTO SHUTDOWN - NO ACCELERATION, Flow-Divider Solenoid Fault (131-9(A))

1. Possible Causes
  • FLOW DIVIDER SOLENOID SHOWS CIRCUIT FAILURE
  • damage/contamination of the electrical connector P13
  • FLOW-DIVIDER SOLENOID (P13)
  • aircraft wiring
  • ELECTRONIC CONTROL BOX [59KD]
  • FLOW-DIVIDER SOLENOID (8025KM)
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
AMM 49-00-00-860-008
APU Start by External Power
AMM 49-32-13-000-001
Removal of Flow Divider and Solenoid Valve (131-9(A))
AMM 49-32-13-400-001
Installation of Flow Divider and Solenoid Valve (131-9(A))
ASM 496102
AMM 49-61-34-000-003
Removal of the Electronic Control Box (ECB) (131-9(A))
AMM 49-61-34-400-003
Installation of the Electronic Control Box (ECB) (131-9(A))
3. Fault Confirmation
Subtask 49-00-81-710-170-A ** ON A/C NOT FOR ALL
A. Read-out of ECB Trouble-Shooting Data
   (1) Put the APU MASTER SW to the ON position.
   (2) Get access to the APU SHUTDOWN report.
   (3) Push the '>' adjacent to LRU DATA:
  • the MCDU menu shows
    FLOW DIVIDER SOLENOID SHOWS CIRCUIT FAILURE

   (4) Start the APU and apply Bleed Air for 20 seconds, minimum AMM 49-00-00-860-008.
4. Fault Isolation
Subtask 49-00-81-810-118-A ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
FLOW DIVIDER SOL P13

associated with the Fault Code Number (FCN) 126

  • do a check for damage/contamination of the electrical connector P13 of the FLOW-DIVIDER SOLENOID (P13)
   (1) If the electrical connector P13 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector P13 is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across
    pin 1 and pin 2
    and
    pin 1 and pin 3
    of the FLOW-DIVIDER SOLENOID (P13).
     (a) If the resistance value are not between 10 Ohms and 80 Ohms (pin 1 to pin 2) and/or < 100 kOhms (pin 1 to pin 3):
     (b) If the resistance values are in the specified limits:
  • do a check and repair of the aircraft wiring from
    the ECB (59KD) AC/11 to the FLOW-DIVIDER SOLENOID (P13) P13/1
    and
    the FLOW-DIVIDER SOLENOID (P13) P13/2 to GND
    ASM 496102.
       1 If the fault continues:
Subtask 49-00-81-810-118-B ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
FLOW DIVIDER SOL(8025KM)

associated with the Fault Code Number (FCN) 126

  • do a check for damage/contamination of the electrical connector P13 of the FLOW-DIVIDER SOLENOID (8025KM)
   (1) If the electrical connector P13 is damaged/contaminated:
  • do a repair/cleaning.
   (2) If the electrical connector P13 is OK:
  • use a MULTIMETER - STANDARD to do a resistance check across
    pin 1 and pin 2
    and
    pin 1 and pin 3
    of the FLOW-DIVIDER SOLENOID (8025KM)
     (a) If the resistance value are not between 10 Ohms and 80 Ohms (pin 1 to pin 2) and/or < 100 kOhms (pin 1 to pin 3):
     (b) If the resistance values are in the specified limits:
  • do a check and repair of the aircraft wiring from
    the ECB (59KD) AC/11 to the FLOW-DIVIDER SOLENOID (8025KM) P13/1
    and
    the FLOW-DIVIDER SOLENOID (8025KM) P13/2 to GND
    ASM 496102.
       1 If the fault continues:
Subtask 49-00-81-710-171-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:35 UTC
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