4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
R 105VU ELEC/BAT REF/BCL2 9PB2 F02 R
B. If the test confirms the fault:
(1) If the voltage read on the lower ECAM DU is equal to the voltage read on the voltmeter of the ELEC panel 35VU:
(a) Do the operational test of the BCL (Ref. AMM TASK 24-38-00-710-001).
1 If the test gives the maintenance message CHECK HOT BUS 2
_
POWER CONSUMPTION:
- do the procedure given in (Ref. TASK 24-38-00-810-835).
2 If the test result is TEST OK:
_
- do a check and repair the wiring (Ref. AWM 24-38-02) between: . the pin A/a of the BCL2 (1PB2) and the first terminal block, . the pin A/Y of the BCL2 (1PB2) and the first terminal block.
- do the removal and the restoration of the BAT2 (2PB2) (Ref. AMM TASK 24-38-51-280-001).
(2) If the voltage read on the lower ECAM DU is different from the voltage read on the voltmeter of the ELEC panel 35VU:
- replace the BCL-2 (1PB2) (Ref. AMM TASK 24-38-34-000-001) and (Ref. AMM TASK 24-38-34-400-001).
(a) If the fault continues:
- replace the P/BSW-ELEC/BAT 2 (7PB2).
1 If the fault continues:
_
- do a check of the wiring (Ref. ASM 24-38/02) between: . the pin 2 of the circuit breaker (8PB2) and the pin A/D3 of the ELEC/BAT 2 pushbutton switch (7PB2) . the pin A/D1 of the ELEC/BAT 2 pushbutton switch (7PB2) and the pin A/A of the BCL 2 (1PB2).
a If the wiring is not correct:
_
- repair or replace as necessary.
b If the wiring is correct:
_ - replace the C/B-ELEC/BAT BUS/REF/BCL2 (8PB2).
「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 ∞∞24-38-00∞∞∞∞∞∞∞∞∞∞Page 245
May 01/03 CES C. If the test confirms the fault:
- do a check of the position of the circuit breaker (9PB2).
(1) If the circuit breaker is closed:
- do a check for 28VDC at pin 2 of the circuit breaker (9PB2).
(a) If there is 28VDC:
- do a check and repair the wiring (Ref. ASM 24-38/02) between: . the pin 2 of the circuit breaker (9PB2) and the pin A/C3 of the ELEC/BAT 2 pushbutton switch (7PB2) . the pin A/C1 of the ELEC/BAT 2 pushbutton switch (7PB2) and the pin A/C of the BCL2 (1PB2).
(b) If there is no 28VDC:
- do a check and repair the wiring (Ref. ASM 24-38/02) between: . the pin 1 of the circuit breaker (9PB2) and the 28VDC HOT BUS 704PP.
(2) If the circuit breaker is open:
- close it.
(a) Do a check of the wiring for a short to ground between the pin 2 of the circuit breaker (9PB2) and the pin A/C3 of the ELEC/BAT 2 pushbutton switch (7PB2) (Ref. ASM 24-38/02).
1_ If the wiring is not correct:
- repair it.
2_ If the wiring is correct:
- replace the C/B-ELEC/BAT REF/BCL2 (9PB2).
D. Do the test given in para. 3.
「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 ∞∞24-38-00∞∞∞∞∞∞∞∞∞∞Page 246
Nov 01/01R
CES TASK 24-38-00-810-834
Abnormal Power Consumption on the 28VDC HOT BUS (701PP)
1. Possible Causes
_______________
- BAT-1 (2PB1)
- BCL-1 (1PB1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-38-00-810-843 Incorrect Discharge of the Battery 1 AMM 24-38-34-000-001 Removal of the Battery Charge Limiter (BCL) (1PB1, 1PB2) AMM 24-38-34-400-001 Installation of the Battery Charge Limiter (BCL)
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