Honeywell Series 8 I/O - F1 Vreffl; F2 Vreffl; F1 Cal_Fl

13. Series 8 I/O Alarms and Failures
13.2. Reviewing IOM soft failures
278 Series 8 I/O User's Guide R500
Honeywell April 2017
Diagnostic check:
TC/RTD FTA 2 identification failure.
Cause:
FTA 2 identification failure
Solution:
Verify/correct the FTA pinning.
54 F1VREFFL
TC/RTD FTA 1 reference voltage failure
Diagnostic check:
TC/RTD FTA 1 reference voltage failure
Cause:
TC/RTD FTA 1 reference voltage failure
Solution:
Replace the FTA.
55 F2VREFFL
TC/RTD FTA 2 reference voltage failure
Diagnostic check:
TC/RTD FTA 2 reference voltage failure
Cause:
TC/RTD FTA 2 reference voltage failure
Solution:
Replace the FTA.
56 F1CAL_FL
TC/RTD FTA 1 calibration failure.
Diagnostic check:
TC/RTD FTA 1 calibration failure.
Cause:
TC/RTD FTA 1 calibration failure.
Solution:
Recalibrate the FTA.