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.

Replace control board.

Perform the Control Board
Power Supply Test.

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

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