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then re-illuminates:
A. Relevant DC Main Feeder Circuit Breakers (PDB) ................................................. PULL
B. DC RESET Switch Light .........................................................................................PUSH
C. RESET Main Feeder circuit breakers one at a time. Allow sufficient time for fault to
recur.
D. After fault isolation, leave applicable circuit breaker pulled (OPEN).
E. DC RESET Switch Light .........................................................................................PUSH
F. If fault indication was LEFT BUS, Essential DC Bus AUTO Switch Light............PUSH
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-61
31 May 2000
5. If RESET Light remains ON:
A. Verify availability of power for faulty bus by selecting Volt/Freq. Meter to LEFT,
RIGHT; and, if APU is running, AUX.
B. If faulty bus is LEFT DC BUS, then:
As available, LEFT MAIN, TRU, or RIGHT MAIN...............................................PUSH
C. If faulty bus is RIGHT DC BUS, then:
As available, RIGHT MAIN, TRU, or LEFT MAIN...............................................PUSH
D. DC RESET Switch Light .........................................................................................PUSH
E. If RESET Switch Light extinguishes, monitor loads for remainder of flight.
F. If RESET Switch Light remains ON, note loss of equipment powered by dead bus.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-62 FAA APPROVED
31 May 2000
3-07-80: Battery or Battery Charger Failure:
Battery Charger Failure (CHGR FAIL) Warning Light illuminated.
1. Appropriate Main AC Bus Power.................................................................................CHECK
2. Affected Battery Current/Voltage............................................................................OBSERVE
If meter reading is abnormal:
3. Battery Charger Circuit Breaker (PDB)........................................................................... PULL
(CHRG FAIL Warning Light will remain ON).
4. After 3 - 5 minutes, Battery Charger Circuit Breaker (PDB) ........................................RESET
If Battery does not charge:
5. Battery Charger Circuit Breaker (PDB)........................................................................... PULL
6. Battery Switch on Affected Side.........................................................................................OFF
NOTE: OFF only if battery is discharging. Reinstate if Battery Power is required.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3-63
13 September 2000
3-07-90: Essential DC Bus On Battery Power:
NOTE: If the essential DC Bus AUTO, L MAIN and BATT switch capsules are illuminated
without the BATT 1 and 2 switches illuminated or the “BATT ON BUS” message (SPZ
8400)/capsule (SPZ 8000) illuminated, the K20/K22 relay has experienced a failure of
one of the two relay poles. Report for maintenance action.
If DC Reset Light is ON, refer to BUS FAULT - AC or DC RESET LIGHT ON Procedure, this
Section.
1. Verify Left and/or Right Main DC Bus is powered
A. If buses are not powered, determine reason and re-power the buses.
B. If buses are powered, verify ESS DC Bus switch selection on EPMP is AUTO.
C. DC Reset Switch .................................................................................................... PRESS
D. Hard select ESS DC to Left, then Right, then back to AUTO. Pause between each step
to determine if power to ESS DC BUS is switched from BATT to either Left or Right
Main Bus.
2. If EPMP switch selection is correct, check Battery Ammeters for discharge.
If Battery Ammeters indicate that batteries are discharging.
A. Load shed as necessary (one or both main boost pumps may be sufficient)
CAUTION: DO NOT ATTEMPT TO START THE APU OR USE THE AUX
HYDRAULIC PUMP.
or
B. Select BATT as power source for ESS DC Bus.
C. Pull Left and Right Main DC Sense circuit breakers (Pilot's CB Panel)
D. Select Standby Electrical Power Switch ON.
E. Select Standby Electrical Power TRU Switch ON.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3-64 FAA APPROVED
13 September 2000
F. Monitor Battery Ammeters. Load shed if required.
NOTE: Steps 2B through 2F cause DU 2 to be unpowered, DU 6 to RED X and copilot’s
PFD to auto-transfer to DU 5 (SPZ 8400 only). Selecting NORM-ALT-ALT on
SG reversionary panel will restore the co-pilot’s displays to normal. DU 2 will
　
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