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TROUBLESHOOTING & REPAIR
F-21 F-21
COMMANDER 400 WITH G2713-2 or -3 CONTROL BOARD
ERROR CODES DURING
INITIALIZATION SEQUENCE
DEFINITION / SYMPTOM CORRECTIVE ACTION
uP
bAd uP
CAL
CrS
Program is stuck in ROM/RAM
check.
ROM/RAM is corrupt.
Program is stuck in calibration
constant loading.
The processor is not getting good
initial zero crosses. Program
waits for 32 clean crosses and
then waits for frequency to get
between 55 and 65 HZ.
Program is stuck waiting for
program stabilization and loading
of exciter voltage register table.
Replace control board.
Replace control board.
Replace control board.
Check exciter voltage waveforms
as illustrated in the Oscilloscope
Waveforms Section.
Perform the Stator Voltage
Exciter Winding Test.
Perform the Engine Throttle
Adjustment Test.
Perform the Exciter Capacitor
Bank Test.
Check leads #268, #269, & #270
from J50 to J4 at the control
board for loose or faulty connec-
tions. Also check the T1, T2, &
T3 lead connections from the
Exciter Module to the stator and
capacitor bank leads.
COMMANDER 400