NOTE:____Watch the EICAS display closely. The values on the display will change quickly.
(g)
Make sure these values show below APU/BAT on the bottom EICAS display: 1) DC-A value increases quickly to 38 |5
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2) DC-V value increases to 33 |4 then decreases to 28 |3
NOTE: It will usually take less than one minute for the
____ voltage value to increase and then decrease. A fully discharged battery can extend this time to 75 minutes.
3) After the DC-V value decreases to 28 |2 make sure the DC-A value is 0 |5.
S 864-012
(6) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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APU BATTERY CHARGER - REMOVAL/INSTALLATION
__________________________________________
1. General
_______
A. The APU battery charger, M207, (referred to as the battery charger) is in the aft equipment center rack, E6.
TASK 24-31-04-004-003
2. Remove the APU Battery Charger
______________________________
A. References
(1) AMM 20-10-01/401, E/E Rack Mounted Components
B. Access
(1)
Location Zone
154 Aft cargo compartment (Right)
(2)
Access Panel
822 Aft cargo compartment door
C. Prepare for Removal
S 864-001
CAUTION: OPEN THESE CIRCUIT BREAKERS IN THE SEQUENCE SHOWN TO PREVENT
_______
DAMAGE TO THE APU BATTERY CHARGER.
(1) Open this circuit breaker on the right miscellaneous electrical equipment panel (referred to as the P37 panel) and attach a DO-NOT-CLOSE tag:
(a) 37B5 OR 37K2, BATTERY CHARGERS APU
S 864-002
(2) Open this circuit breaker on the aft equipment center rack (referred to as the E6 rack) and attach a DO-NOT-CLOSE tag:
(a) APU BAT CHGR
S 034-004
(3) Do these steps to disconnect the APU battery charger:
(a)
Open the front cover on the E6 rack.
(b)
Remove the electrical connector from the battery charger.
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AFT CARGO DOOR
AFT CARGO
DOOR
AFT EQUIPMENT
CENTER RACK, E6
APU BATTERY
SEE A CHARGER
SEE B
FWD
AFT EQUIPMENT CENTER RACK, E6
A
1
ELECTRICAL
CONNECTOR
WASHER
LOCKWASHER
NUT
TERMINAL
BLOCK COVER
WASHER WIRES
SCREW
WASHER FWD
LOCKWASHER NUT
APU BATTERY CHARGER
1 BATTERY CHARGER WITH THE CHARGER AND BATTERY LEDs B
APU Battery Charger Installation Figure 401
L26639
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(c)
Remove the terminal cover from the battery charger.
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