Lincoln Electric COMMANDER 400 SVM133-B Service Manual page 71

F-17
COMMANDER 400 WITH G2713-1 CONTROL BOARD
ERROR CODES DURING
INITIALIZATION SEQUENCE
300
bAd uP
400
600
700
500
or
---
TROUBLESHOOTING & REPAIR
DEFINITION / SYMPTOM
Program is stuck in ROM/RAM
check.
ROM/RAM is corrupt.
Program is stuck in power supply
stabilization.
Program is stuck in register
initialization and Interrupt
enables.
Program is stuck in calibration
constant loading.
The processor is not getting good
initial zero crosses.
The program waits for 32 clean
crosses and then waits for
frequency to get between 55
and 65 HZ.
or
Program is stuck waiting for
program stabilization and loading
of exciter voltage register table.
COMMANDER 400
CORRECTIVE ACTION
Replace control board.
Replace control board.
Perform the Control Board
Power Supply Test.
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.
F-17