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switch ON, and DC BUS 1 and AC TRANSFER BUS 1 do not
have power
* Main battery overheat.
The auxiliary battery charger cannot go into the charge mode
during any of these conditions:
* Standby power switch (P5-5) in the BAT position
* Standby power switch (P5-5) in the AUTO position, battery
switch ON and DC BUS 1 and AC TRANSFER BUS 1 do not
have power.
* Auxiliary battery overheat.
Status Lights
Both status lights are usually on when the battery charger has
input power. A malfunction with any of these components
makes one or both status lights go off:
* Battery charger
* Battery
* Connection wiring.
Both status lights are off if any of these conditions are true:
* Input power to the battery charger goes away
* Input voltage to the battery charger is less than 94v ac for
more than 0.5 seconds.
DC GENERATION SYSTEM - MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGER
EFFECTIVITY
GUN 013-015, 111-114, 201-999 24-31-00
Page 13
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-31-00-041
The battery charger status light is on and the battery status light
is off if any of these conditions are true:
* Battery charger senses a loss of connection to the battery
* Battery overheat
* Battery temperature sensor open or shorted
* Battery not charged in time limits
* Battery voltage less than lower limits.
The battery charger status light is off and the battery status light
is on when there is an internal battery charger failure. The
battery charger fail maintenance message also shows on P5-13
BITE.
DC GENERATION SYSTEM - MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGER
EFFECTIVITY
GUN 013-015, 111-114, 201-999 24-31-00
Page 14
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-31-00-041
DC GENERATION SYSTEM - MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGER
DC GENERATION SYSTEM - MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGER
EFFECTIVITY
GUN 013-015, 111-114, 201-999 24-31-00
Page 15
D633A101-GUN Jun 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-31-00-041
Functional Description
The battery charger takes 3-phase, 115v ac power and changes
it to dc power. Usually, the battery charger is in the transformer
rectifier mode. The battery charger supplies a constant voltage
output in this mode. The charger can supply up to 65 amps in
this mode.
The battery charger goes to the charge mode when the battery
voltage goes below 23v dc. In this mode, the charger supplies
constant current power. The output voltage is variable, the
current output is 50 amps. During the charge, the battery
voltage increases until the voltage gets to the inflection point.
The charger logic uses the battery temperature at the start of
charge to calculate the inflection point. The charger logic then
calculates the length of the overcharge period.
After the overcharge period, the charger goes into a
transformer rectifier mode with a constant 27.5v dc output.
The battery gets a trickle charge in this mode.
The battery charger goes into the charge mode again if any of
these occur:
* Battery charger input power is off for more than 1 second
* Battery voltage goes below 23 volts.
You use the electrical meters, battery and galley power module
to monitor the operation of the battery charger.
The battery charger is in the charge mode when you see a
positive DC AMPS indication when the DC meter selector in the
BAT position.
The battery charger cannot go into the charge mode during any
of these conditions:
* Fueling station door open
* APU start
* Standby power switch (P5-5) to the BAT position
* Standby power switch (P5-5) to the AUTO position, battery
switch ON, and DC BUS 1 and AC TRANSFER BUS 1 do not
have power
* Battery overheat.
DC GENERATION SYSTEM - BATTERY CHARGER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN ALL 24-31-00
Page 16
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-31-00-065
DC GENERATION SYSTEM - BATTERY CHARGER - FUNCTIONAL DESCRIPTION
DC GENERATION SYSTEM - BATTERY CHARGER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 001-012, 016-099, 101-110, 115 24-31-00
　
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