- C/B-CNTOR 3XC SW SPLY (5XC)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-24-55-000-002 Removal of the AC ESS BUS Contactor (15XE) AMM 24-24-55-400-002 Installation of the AC ESS BUS Contactor (15XE) AMM 24-25-00-710-001 Operational Test of the AC Essential Generation
 Switching AMM 24-25-55-000-001 Removal of the AC Essential Bus Switching Contactor (3XC) AMM 24-25-55-400-001 Installation of the AC Essential Bus Switching Contactor (3XC) ASM 24-25/01
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the AC essential generation switching (Ref. AMM TASK 24-25-00-710-001).
 4. Fault Isolation
_______________
 A. If the test confirms the fault:
 - do a check for 115VAC between the pins A/K and A/L of the AC essential bus switching contactor (3XC) (Ref. ASM 24-25/01).
 (1) If there is 115VAC:

 - replace the CNTOR-AC ESS BUS SWITCHING (3XC) (Ref. AMM TASK 24-25-55-000-001) and (Ref. AMM TASK 24-25-55-400-001).

 (2) If there is no 115VAC:

 - do a check of the status of the circuit breaker (5XC).
 (a) If the circuit breaker (5XC) is closed:
 - do a check for 115VAC at the pin 2 of the circuit breaker (5XC).
 1 If there is 115VAC:
_
 - do a check and repair the wiring: . between the pin A/K of the contactor (3XC) and the circuit breaker (5XC) through these components (and replace them if necessary):
 * P/BSW-ELEC/AC ESS FEED (11XC)

 * RELAY-EMER CONDITION (12XE)

 * CNTOR-AC ESS BUS SWITCHING (15XE) (Ref. AMM TASK 24-24-55-000-002) and (Ref. AMM TASK 24-24-55-400-002)

 * CNTOR-AC ESS BUS SWITCHING (3XC) (Ref. AMM TASK 24-25-55-000-001) and (Ref. AMM TASK 24-25-55-400-001)
 . between the pin A/L of the contactor (3XC) and the ground
 (Ref. ASM 24-25/01).

 2 If there is no 115VAC:
_
 - do a check of the status of the circuit breaker (2XC).
 a If the circuit breaker (2XC) is closed:
_
 - do a check and repair the wiring between: . the pins A2, B2, C2 of the circuit breaker (2XC) and the pins T1, T2, T3 of the contactor (3XC) . the pin T3 of the contactor (3XC) and the pin 1 of the circuit breaker (5XC) (Ref. ASM 24-25/01)
 b If the circuit breaker (2XC) is open:
_ - close it.
 c If the circuit breaker trips:
_
 - do a check for a short to ground at the wiring between: . the pins A2, B2, C2 of the circuit breaker (2XC) and the pins T1, T2, T3 of the contactor (3XC) . the pin T3 of the contactor (3XC) and the pin 1 of the circuit breaker (5XC) (Ref. ASM 24-25/01).
 d If the fault continues:
_
 - replace the C/B-AC ESS/BUS ON/BUS 2 (2XC).
 (b) If the circuit breaker (5XC) is open:
 - close it.
 1 If the circuit breaker trips:
_
 - do a check for a short to ground at the wiring between the circuit breaker (5XC) and the pin A/N then the pin A/K of the contactor (3XC) through all the components given in Para. 4.A (2)(a)1_ (Ref. ASM 24-25/01).
 「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 216
 Feb 01/98 CES a If the wiring is not correct:

_
 - repair it. b If the wiring is correct:
_
 - replace the C/B-CNTOR 3XC SW SPLY (5XC). R B. Do the test given in para. 3.

 TASK 24-50-00-810-806

 Unwanted Warning from the AC1 Busbar
 1. Possible Causes_______________ 
R R RR  - SDAC-1 (1WV1) - SDAC-2 (1WV2) - RELAY-BUS 1XP CTL (15XC) - wiring - RELAY-BUS 1XP CTL (20XN1) - C/B-ELEC/AC/BUS1/CTL (17XN1)
 2. Job Set-up Information______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
R R  AMM AMM AMM AMM AMM ASM ASM  24-41-00-861-002 24-41-00-862-002 31-55-34-000-001 31-55-34-400-001 31-60-00-860-001 24-25/0124-51/02 Energize the Aircraft Electrical Circuits from the External PowerDe-energize the Aircraft Electrical Circuits Supplied from the External Power Removal of the SDAC (1WV1,1WV2) Installation of the SDAC (1WV1,1WV2)EIS Start Procedure
 3. Fault Confirmation__________________
　
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