GE D90 Plus Instruction Manual page 597

CHAPTER 14: TESTING
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CPU CARD TROUBLE
Description: The CPU module in the indicated slot is not operational.
Severity: Device is temporarily out-of-service
If this message appears, reset the alarm. If the alarm recurs, replace the specified CPU
module.
EQUIPMENT MISMATCH
Description: The configuration of modules does not match the order code stored in the
CPU.
Severity: Protection is not available.
If this message appears, check all modules against the order code. Ensure they are
inserted properly, and recycle the control power.
IO SLOT FAILURE
Description: An input/output module in the indicated slot is not operational.
Severity: Device is temporarily out-of-service.
If this message appears, reset the alarm. If the alarm recurs, replace the specified input/
output module.
SYSTEM TROUBLE
Description: An internal error has occurred.
Severity: Device is temporarily out-of-service
If this message appears, reset the alarm. If the alarm recurs, contact GE Grid Solutions
for further instructions.
UNIT NOT PROGRAMMED
Description: The unit is configured as not programmed.
Severity: Protection is not available
If this message appears, confirm that the unit has the proper settings. Change the Relay
Settings value to "Programmed".
The minor self-test error messages are indicated in yellow on the annunciator display and
are described below.
AC SLOT FIRMWARE MISMATCH
Description: There a firmware mismatch between the AC card in the indicated slot and the
CPU.
Severity: Protection is not available, and relay is not operational.
If this message appears, contact GE Grid Solutions. It may be necessary to replace the
specified AC module or update its firmware.
AUTOMATION LOGIC ERROR
Description: There is an error within an automation logic equation.
Severity: Protection is not available, and relay is not operational.
If this message appears, modify the automation logic to make it valid and reload.
AUTOMATION MATH ERROR
Description: A mathematical operation in the automation logic has produced an invalid
result.
Severity: Protection is available. Automation logic may not produce expected results.
If this message appears, check the event record to determine the nature of the error.
Review the automation logic to confirm correct programming.
SELF-TESTS
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