6-
4
DGP Digital Generator Protection System
GE Power Management
6.3 TROUBLESHOOTING
6 SERVICING
6
6.3 TROUBLESHOOTING
6.3.1 DESCRIPTION
Troubleshooting the relay requires three steps.
1.
Determine the type of failure. The type is either a critical, non-critical, or a system-status failure.
2.
Use the list of failure codes, warning codes, or the INFORMATION–STATUS command to determine which
module is defective.
3.
Replace the defective module in accordance with safety and static-discharge precautions.
The troubleshooting sections are as follows:
•
Servicing a Critical Failure FAIL
•
Servicing a Non-Critical Failure WARN
•
Servicing a System Status Failure
Refer to Chapter 4: ACCEPTANCE TESTS for test of the MMI display, keypad, and printer port,
and of the measuring units.
6.3.2 USING THE INFORMATION STATUS COMMAND
Tables 6–6: ERROR MESSAGES AT STARTUP and 6–7: ERROR MESSAGES AT RUNTIME have been pro-
vided as a listing of all the FAIL and WARN messages. They can be used to decode FAIL
xxx
and WARN
xxx
codes. A list of failure and warning codes is provided, but the INFORMATION–STATUS command can be used
to extract the same data from the MMI display. The INFORMATION–STATUS command can be used locally at
the relay site or remotely over a modem link.
The INFORMATION–STATUS command is invoked as follows:
1.
Apply rated DC power to the relay and wait for initialization to complete.
2.
Press the [INF] key. Then scroll with the arrow keys until the heading INF: STATUS is displayed. If you
have a printer, press the [PRT] key.
3.
Press the [ENT] key.
The display will indicate that there is a failure with the words STATUS: FAIL.
4.
Press the [
↑]
key to get a detailed report of the failure. A complete list of the possible errors is shown in the
following tables:
•Table 6–4: SYSTEM STATUS ERROR MESSAGES on page 6–6
•Table 6–5: MISCELLANEOUS MESSAGES on page 6–6
•Table 6–6: ERROR MESSAGES AT STARTUP on page 6–7
The FAIL and WARN messages are also included. Their descriptions can also be displayed on the MMI,
by using the INFORMATION–STATUS command.
After initial power up or loss of power exceeding 24 hours, the time and date will reset to
00:00:00 01/01/90. All event and fault data will be reset
NOTE
NOTE
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