GE Multilin 469 Instruction Manual page 98

4.1.8 Self-Test Warnings
4–8
key, followed by the
MESSAGE
additional information and a complete list of diagnostic messages, refer to Diagnostic
Messages on page 6–37.
The 469 relay performs self test diagnostics at initialization (after power up) and
continuously as a background task to ensure the hardware and software is functioning
correctly. Self-test warnings indicate either a minor or major problem. Minor problems are
problems that does not compromise motor protection. Major problems are very serious
problems that compromise all aspects of relay operation. Upon detection of either a minor
or a major problem the relay will:
• De-energize the self-test warning relay
• Light the self-test warning LED
• Flash a diagnostic message periodically on the display screen
Message
Self-Test Warning 1
Replace Immediately
Self-Test Warning 2
Replace Immediately
Self-Test Warning 3
Replace Immediately
Self-Test Warning 5
Replace Immediately
Self-Test Warning 6
Replace Immediately
Self-Test Warning 7
Replace Immediately
Self-Test Warning 8
Replace Immediately
Clock Not Set
Program Date/Time
Unit Temp. Exceeded
Service/CheckAmbient
Unit Not Calibrated
Replace Immediately
key, to scroll through the messages. For
MESSAGE
Table 4–1: Self-Test Warnings
Severity
Caused by detection of a corrupted location in the
program memory as determined by a CRC error
Major
check. Any function of the relay is susceptible to
malfunction from this failure.
Caused by a failure of the analog to digital
Major converter A/D1. The integrity of system input
measurements is affected by this failure.
Caused by a failure of the analog to digital
Major converter A/D2. The integrity of system input
measurements is affected by this failure.
Caused by out of range reading of self-test
Major RTD 13. The integrity of system input
measurements is affected by this failure.
Caused by out of range reading of self-test
Major RTD 14. The integrity of system input
measurements is affected by this failure.
Caused by out of range reading of self-test
Major RTD 15. The integrity of system input
measurements is affected by this failure.
Caused by out of range reading of self-test
Major RTD 16. The integrity of system input
measurements is affected by this failure.
Minor Occurs if the clock has not been set.
Caused by the detection of unacceptably low (less
Minor than -40°C) or high (greater than +85°C)
temperatures detected inside the unit.
This warning occurs when the relay has not been
Minor
factory calibrated.
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES
Failure description