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GF0710_034a
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
ELECTRICAL
DC SYSTEM EICAS MESSAGES
BATT MASTER OFF
Indicates that the battery switch is not on.
BATT BUS FAIL
Indicates that battery bus is not powered due to a fault.
DC EMER BUS FAIL
Indicates that DC EMER BUS is not powered due to a fault.
APU (AV) BATT FAIL
Indicates that APU (AV) battery has failed, voltage or temperature is out of range.
DC BUS 1 (2) FAIL
Indicates that affected DC bus is not powered due to a fault or is shed.
DC ESS BUS FAIL
Indicates that
DC ESS BUS is not
powered due to a fault.
ELEC SYS FAIL (on ground only)
Indicates that a major fault has been detected in the electrical system.
CAIMS LEVEL A fault. Prevents aircraft dispatch until fixed.
GF0710_035a
Volume 2 Flight Crew Operating Manual Rev 3, Apr 25, 2005
ELECTRICAL
DC SYSTEM EICAS MESSAGES (CONT'D)
BATT EMER PWR ON
Indicates that the batteries are feeding the DC ESS BUS and BATT busses in an emergency condition.
CB TRIP
Indicates that a circuit breaker has tripped.
EXT DC PWR AVAIL
Indicates that external DC power is available.
BATT BUS MAN OFF DC BUS 1 (2) MAN OFF DC ESS BUS MAN OFF
Indicates that affected DC bus has been manually isolated. DC essential cannot be manually isolated if battery has been isolated and vice versa.
APU (AV) BATT CHGR FAIL
Indicates that affected battery charger has detected a fault and has shut down.
ELEC SYS FAULT (on ground only)
Indicates that a minor fault has been detected in the electrical system.
CAIMS Level C fault. Fault must be fixed within 10 days.
TRU 1.2 FAIL
ESS TRU 1.2 FAIL
Indicates that affected
TRU has failed.
EXT DC PWR ON
Indicates that external DC power has been selected on.
GF0710_036a
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
ELECTRICAL
DC SYSTEM SYNOPTIC
EICAS Control Panel
GF0710_039
The DC electrical page contains digital readouts of TRU and battery output (voltage and ampere output), input/output flow on the bus bars, general status information via color logic and the following messages:
.
CHARGER message (adjacent to APU BATT symbol) . APU battery is not charging. Corresponds to APU BATT CHGR FAIL advisory message .
.
CHARGER message (adjacent to AV BATT symbol) . Main airplane battery is not charging. AV BATT CHGR FAIL advisory message displayed on EICAS.
.
SHED message . Corresponding DC bus has been shed.
message . Corresponding DC bus is isolated. DC BUS 1, 2, MAN OFF, DC ESS MAN OFF and/or BATT BUS MAN OFF status message displayed on EICAS.
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