Continue to Ignite state (8).
Start the chopper.
Did the Preflow/Charge DC state (7)
complete correctly?
Continue troubleshooting steps
to identify the problem. Start
the Preflow/Charge DC state (7) again.
No
Yes
Start the fans (if they are OFF).*
Start the coolant pump (if it is OFF).*
Measure the gas pressure.
Start the preflow gas flow.
Start the inrush contactor, then start the main contactor.
Make sure that the Hold Ignition signal is OFF.
* To increase energy preservation, the coolant pump and fans stop after the time limit is expired without a
command.
If the Preflow/Charge DC state (7) completes successfully, the process continues with Ignite state (8) on
page 222.
Refer to Initial inspection steps on page 273 for troubleshooting procedures.
Ignite state (8)
During the Ignite state (8), the system does a check for correct gas pressures, DC bus voltage, and
chopper current. The Ignite state (8) must be completed in 500 milliseconds or less.
Operation
6
222
811530 Instruction Manual XPR460
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