- replace the DU-ECAM, UPPER (4WT1) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
(b) If there is 115VAC:
- do a check for a ground signal at pin AA/102 of the upper ECAM DU (4WT1).
1_ If there is no ground signal:
- repair the wiring from upper ECAM DU (4WT1) pin AA/102 to
the ground terminal.
2 If there is a ground signal:
_
- do a check of the wiring from upper ECAM DU (4WT1) pin AA/104 to the circuit breaker (13WT1).
a If there is no continuity:
_ - repair the wiring.
b If there is continuity:
_ - replace the C/B-EIS/ECAM DU/UPPER/SPLY (13WT1).
(2) If the fault continues:
- do a check of the wiring from upper ECAM DU (4WT1) pins AA/49, 50, 51 to ECAM control panel (6WT) pins A/B, C, U (Ref. ASM 31-68/01).
(a) If there is continuity:
- replace the DU-ECAM, UPPER (4WT1) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
1 If the fault continues:
_
- replace the CTL PNL-ECAM (6WT) (Ref. AMM TASK 31-61-12-000-001) and (Ref. AMM TASK 31-61-12-400-001).
(b) If there is no continuity:
- repair the wiring from upper ECAM DU (4WT1) pins AA/49, 50, 51 to ECAM control panel (6WT) pins A/B, C, U.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 216
201-299, 301-399, Aug 01/05 CES
B. If the upper ECAM DU stays off and if the EIS DMC selector switch (18WT) on the SWITCHING panel 8VU is at CAPT/3:
(1) Do a check for 28VDC at pin AA/93 on the upper ECAM DU (4WT1) (Ref. ASM 31-61/02).
(a) If there is 28VDC:
- replace the DU-ECAM, UPPER (4WT1) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
(b) If there is no 28VDC:
- do a check for a ground signal at pin AA/106 of the upper ECAM DU (4WT1).
1 If there is no ground signal:
_
- repair the wiring from upper ECAM DU (4WT1) pin AA/106 to the ground terminal.
2 If there is a ground signal:
_
- do a check of the wiring from upper ECAM DU (4WT1) pin AA/93 to the circuit breaker (24WT1).
a If there is no continuity:
_ - repair the wiring.
b If there is continuity:
_ - replace the C/B-EIS/ECAM DU/UPPER/SWTG (24WT1).
(2) If the fault continues:
- do a check for 115VAC at pin AC/2 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
(a) If there is 115VAC:
- replace the DMC-3 (1WT3) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
(b) If there is no 115VAC:
- do a check for a ground signal at pin AC/7 of the DMC3 (1WT3).
1 If there is no ground signal:
_
- repair the wiring from DMC3 (1WT3) pin AC/7 to the ground terminal.
2 If there is a ground signal:
_ - replace the RELAY-BUS1 TO ESS BUS SWTG, DMC3 (26WT).
a If the fault continues:
_
- do a check of the wiring from the DMC3 BUS1 TO ESS BUS SWTG relay (26WT): . pin A2 to DMC3 (1WT3) pin AC/2 . pin A1 to the EIS/DMC3/STBY/SPLY circuit breaker (14WT1)
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 217
201-299, 301-399, Aug 01/05 CES . pin X2 to the BUS 1XP CTL relay (20XN1), repair the wiring which has no continuity.
(3) If the fault continues:
- do a check for 28VDC at pin AC/3 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
(a) If there is 28VDC:
- replace the DMC-3 (1WT3) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
(b) If there is no 28VDC:
- do a check for a ground signal at pin AC/11 of the DMC3 (1WT3) (Ref. ASM 31-61/02).
1_ If there is no ground signal:
- repair the wiring from DMC3 (1WT3) pin AC/11 to the ground
terminal.
2 If there is a ground signal:
_
- do a check of the wiring from DMC3 (1WT3) pin AC/3 to the circuit breaker (21WT3) (Ref. ASM 31-61/02).
a If there is no continuity:
_
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本文链接地址：A320 Trouble Shooting Manual 排故手册 指示和记录系统 3(104)
