R A. If the test confirms the fault:
R - do a check of the status of the ELEC/GEN2 OFF/BTC2 SPLY circuit breaker
R (8XU).
R (1) If the circuit breaker is closed:
R - replace the BTC-2 (11XU2) (Ref. AMM TASK 24-22-55-000-001) and
R (Ref. AMM TASK 24-22-55-400-002).
R (a) If the fault continues:
R - do a check and repair the wiring between the pin B/5 of the
R BTC2 (11XU2) and the pin AA/9A of the GCU2 (1XU2) (Ref. ASM 24-R 22/03).
R 1_ If the fault continues:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001)
R and (Ref. AMM TASK 24-22-34-400-001).
R (b) If the fault continues:
R - do a check for 28VDC.
R 1_ If there is no 28VDC at the pin A/A2 of the GLC2 auxiliary
R control relay (4XU2):
R - replace the RELAY-GLC 2 AUX CTL (4XU2).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-50-00∞∞∞∞∞∞∞∞∞∞Page 259
Aug 01/05 CES
R a_ If the fault continues:
R - repair the wiring between the pin 2 of the ELEC/GEN2
R OFF/BTC2 SPLY circuit breaker (8XU) and the pin A/A3 of
R the GLC2 auxiliary control relay (4XU2) (Ref. ASM 24-
R 23/02).
R 2_ If there is no 28VDC at the pin B/22 of the GLC2 (9XU2):
R - replace the GLC-2 (9XU2) (Ref. AMM TASK 24-22-55-000-001)
R and (Ref. AMM TASK 24-22-55-400-002).
R a_ If the fault continues:
R - repair the wiring between the pin A/A2 of the GLC2
R auxiliary control relay (4XU2) and the pin B/24 of the
R GLC2 (9XU2) (Ref. ASM 24-22/03).
R 3_ If there is no 28VDC at the pin B/3 of the BTC2 (11XU2):
R - replace the RELAY-SMOKE (30XU2).
R a_ If the fault continues:
R - do a check and repair the wiring (Ref. ASM 24-22/03)
R between:
R . the pin B/22 of the GLC2 (9XU2) and the pin A/B2 of the
R smoke relay (30XU2)
R . the pin A/B3 of the smoke relay (30XU2) and the pin B/3
R of the BTC2 (11XU2).
R (2) If the circuit breaker is open:
R - close it.
R (a) If the circuit breaker trips again:
R - do a check of the wiring for a short to ground between the
R ELEC/GEN2/OFF/BTC2 SPLY circuit breaker (8XU) and the pin B/3
R of the BTC2 (11XU2) (Ref. ASM 24-22/03).
R 1_ If the wiring is not correct:
R - repair it.
R 2_ If the wiring is correct:
R - replace the C/B-ELEC/GEN2/OFF/BTC2 SPLY (8XU).
R (3) If the fault continues:
R - continue this fault isolation procedure from step 4.B.
R B. Do a check of the status of the ELEC/GEN1/OFF/BTC1 SPLY circuit breaker
R (5XU).
R (1) If the circuit breaker is closed:
R - replace the BTC-1 (11XU1) (Ref. AMM TASK 24-22-55-000-001) and
R (Ref. AMM TASK 24-22-55-400-002).
R (a) If the fault continues:
R - do a check and repair the wiring between the pin B/5 of the
R BTC1 (11XU1) and the pin AA/9A of the GCU1 (1XU1) (Ref. ASM 24-R 22/02).
R 1_ If the fault continues:
R - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001)
R and (Ref. AMM TASK 24-22-34-400-001).
R (b) If the fault continues:
R - do a check for 28VDC.
R 1_ If there is no 28VDC at the pin A/D2 of the EPC auxiliary
R control relay (5XG):
R - replace the RELAY-EPC AUX CTL (5XG).
R a_ If the fault continues:
R - repair the wiring between the ELEC/GEN1/OFF/BTC1 SPLY
R circuit breaker (5XU) and the pin A/D3 of the EPC
R auxiliary control relay (5XG) (Ref. ASM 24-22/02) and
R (Ref. ASM 24-23/02).
R 2_ If there is no 28VDC at the pin A/A2 of the GLC1 auxiliary
R control relay (4XU1):
R - replace the RELAY-GLC 1 AUX CTL (4XU1).
R a_ If the fault continues:
R - repair the wiring between the pin A/D2 of the EPC
R auxiliary control relay (5XG) and the pin A/A3 of the
R GLC1 auxiliary control relay (4XU1) (Ref. ASM 24-23/02)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 电源 3(139)
