(d) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 22-28
2) DC AMPS = a negative value
NOTE: The battery current is negative when the battery is discharging.
(e) Make sure the BAT DISCHARGE light on the P5-13 panel comes on. This light will come
on when any of these conditions are met:
1) The battery current is greater than 5 Amps for more than 95 seconds.
2) The battery current is greater than 15 Amps for more than 25 seconds.
3) The battery current is greater than 100 Amps for more than 1.2 seconds.
(f) Set the GRD PWR switch to the ON position.
(g) Make sure the DC AMPS value goes to 45 ±10 AMPS and then goes down to less than 5
AMPS within 180 minutes.
NOTE: 180 minutes is the maximum. It can take less time depending the state of the
battery.
(h) Make sure the DC VOLTS value goes to 30 ±3 VOLTS.
(i) Make sure the BAT DISCHARGE light goes off.
(j) To get access to the main equipment center, open this access panel:
Number Name/Location
117A Electronic Equipment Access Door
(k) Make sure the BATTERY and CHARGER lights on the front panel of the battery charger
are ON.
(l) Open this circuit breaker:
Power Distribution Panel Number 2, P92
Row Col Number Name
E 1 C00809 BAT CHGR
NOTE: Leave the circuit breaker open for more than 60 seconds.
(m) Close this circuit breaker:
Power Distribution Panel Number 2, P92
Row Col Number Name
E 1 C00809 BAT CHGR
(n) Get access to the flight compartment, make sure the ELEC light on the P5-13 panel is
ON.
(o) Set both the AC meter selector switch and the DC meter selector switch to the TEST
positions.
(p) Push and release the MAINT switch on the P5-13 panel to start the display test.
(q) After the display test is complete, push the MAINT switch to view the messages.
(r) Make sure this message appears: BAT CHGR INOP.
(s) Push the MAINT switch until this message appears: HOLD BUTTON CLEAR FAULTS.
(t) To clear the message push and hold the MAINT switch for 6 seconds.
(u) Make sure this message appears: FAULTS CLEARED.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-31-21
Page 502
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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