Honeywell Series 8 I/O - Hdiagto; Hstackhi; Fta3 Fail; Fta4 Fail

13. Series 8 I/O Alarms and Failures
13.2. Reviewing IOM soft failures
282 Series 8 I/O User's Guide R500
Honeywell April 2017
165 HDIAGTO
HART processor diagnostic task under-run.
Diagnostic check:
Cause:
HART processor diagnostic task under-run.
Solution:
166 HSTACKHI
HART processor program stack above 90% usage level..
Diagnostic check:
Cause:
HART processor program stack above 90% usage level.
Solution:
167 FTA3FAIL
TC/RTD: FTA 3 has a Soft failure.
Diagnostic check:
Check FTA 3.
Cause:
TC/RTD: FTA 3 has a Soft failure.
Solution:
Check FTA 3. This soft failure is introduced in Series 8.
168 FTA4FAIL
TC/RTD: FTA 4 has a Soft failure.
Diagnostic check:
Check FTA 4.
Cause:
TC/RTD: FTA 4 has a Soft failure.
Solution:
Check FTA 4. This soft failure is introduced in Series 8.