(b) If the fault continues:

 - do a check for a short to ground and repair the wiring if necessary (Ref. ASM 33-51/02) and (Ref. ASM 33-51/04): from EPSU (13WL) pin E to the connector(s) of the related signs and lights, from EPSU (13WL) pin F to the connector(s) of the related signs and lights, from EPSU (13WL) pin G to the connector(s) of the related signs and lights, from EPSU (13WL) pin N to the connector(s) of the related signs and lights, from EPSU (13WL) pin R to the connector(s) of the related signs and lights, from EPSU (13WL) pin T to the connector(s) of the related signs and lights, from EPSU (13WL) pin -B to the connector(s) of the related signs and lights, from EPSU (13WL) pin -J to the connector(s) of the related signs and lights,

 - if you find a short to ground in the wiring, replace the POWER SUPPLY UNIT-EMERGENCY (13WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).

 (c) If the fault continues:

 - do a check and repair the wiring if necessary (Ref. ASM 33-51/02): from EPSU (13WL) pin -P to DEU-B (300RH5) pin B/17, from EPSU (13WL) pin X to DEU-B (300RH5) pin B/16, from EPSU (13WL) pin L to GND, from EPSU (13WL) pin M to GND, from EPSU (13WL) pin U to GND, from EPSU (13WL) pin -R to GND, from EPSU (13WL) pin -M to GND.
 C. Do the test as given in the Para. 3.A.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.
 「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, 101-105, 151-199, ∞∞33-51-00∞∞∞∞∞∞∞∞∞∞Page 205
 201-299, May 01/05 CES

 TASK 33-51-00-810-802

 EPSU - Battery Fault
 1. Possible Causes
_______________
 - BATTERY

 - POWER SUPPLY UNIT-EMERGENCY (10WL)

 - POWER SUPPLY UNIT-EMERGENCY (11WL)

 - POWER SUPPLY UNIT-EMERGENCY (12WL)

 - POWER SUPPLY UNIT-EMERGENCY (13WL)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 33-51-00-710-001 Operational Test of Emergency Lights by 'TEST EMER
 LIGHT SYS' Pushbutton AMM 33-51-00-710-006 Operational Test of Emergency Lights not with CIDS AMM 33-51-38-000-001 Removal of the Emergency Power-Supply Unit (EPSU) AMM 33-51-38-400-001 Installation of the Emergency Power-Supply Unit
 (EPSU)
 3. Fault Confirmation
__________________
 A. Do the operational test of the emergency lighting system (Ref. AMM TASK 33-51-00-710-001).
 4. Fault Isolation
_______________
R **ON A/C 001-003, 051-052,
 A. If the operational test gives the maintenance message:
 (1) EPSU BATTERY FWD L:
 - do the operational test of the battery of POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-00-710-006).
 (a) If the red BATTERY FAULT LED comes on:
 - replace the BATTERY (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001),

 - do the operational test of the battery again.

 1 If the fault continues:
_
 - replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
 「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, 101-105, 151-199, ∞∞33-51-00∞∞∞∞∞∞∞∞∞∞Page 206
 201-299, May 01/05 CES (2) EPSU BATTERY EMER L:

 - do the operational test of the battery of POWER SUPPLY UNIT-EMERGENCY (11WL) (Ref. AMM TASK 33-51-00-710-006).
 (a) If the red BATTERY FAULT LED comes on:
 - replace the BATTERY (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001),

 - do the operational test of the battery again.

 1 If the fault continues:
_
 - replace the POWER SUPPLY UNIT-EMERGENCY (11WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
 (3) EPSU BATTERY EMER R:
 - do the operational test of the battery of POWER SUPPLY UNIT-EMERGENCY (12WL) (Ref. AMM TASK 33-51-00-710-006).
 (a) If the red BATTERY FAULT LED comes on:
 - replace the BATTERY (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001),

 - do the operational test of the battery again.

 1 If the fault continues:
_
 - replace the POWER SUPPLY UNIT-EMERGENCY (12WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
　
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