Honeywell Series 8 I/O - F4 Iderr; F3 Vreffl; F4 Vreffl

13. Series 8 I/O Alarms and Failures
13.2. Reviewing IOM soft failures
284 Series 8 I/O User's Guide R500
Honeywell April 2017
Diagnostic check:
Verify/correct the FTA pinning.
Cause:
TC/RTD FTA 3 identification failure.
Solution:
Verify/correct the FTA pinning. This soft failure is introduced in
Series 8.
174 F4IDERR
TC/RTD FTA 4 identification failure.
Diagnostic check:
Verify/correct the FTA pinning.
Cause:
TC/RTD FTA 4 identification failure.
Solution:
Verify/correct the FTA pinning. This soft failure is introduced in
Series 8.
175 F3VREFFL
TC/RTD FTA 3 reference voltage failure.
Diagnostic check:
None
Cause:
TC/RTD FTA 3 reference voltage failure.
Solution:
Replace the FTA. This soft failure is introduced in Series 8.
176 F4VREFFL
TC/RTD FTA 4 reference voltage failure.
Diagnostic check:
None
Cause:
TC/RTD FTA 4reference voltage failure.
Solution:
Replace the FTA. This soft failure is introduced in Series 8.