Honeywell XNX - Page 79

XNX Universal Transmitter Quick Start Guide
79
Fault Description
Appli-
cable
Sensors
Latching/
Non-Latch-
ing
Frequencyof
Diagnostic
EventHistoryData ActionForResolution
F164 mV sensor failure mV Latching 1 second
Sensor fault or warning code (Note 4)
Check sensor connections, check sen- sor operation, replace sensor, replace personality board.
F165
mA Calibration failure
all Latching 2 seconds
DAC: Digital to Analog Converter (4-20 mA output) ADC: Analog to Digital Converter (4-20 mA internal feedback) 0 OK 1 DAC 4 mA point is too low 2 DAC 4 mA point is too high 4 DAC 20 mA point is too low 8 DAC 20 mA point is too high 16 ADC 4 mA point is too low 32 ADC 4 mA point is too high 64 ADC 20 mA point is too low 128 ADC 20 mA point is too high
Indicates that 4-20 mA calibration failed and discarded. Events history parameter indicates which calibration point has failed. If 4-20 mA calibration fails with F165, no changes take place so the 4-20 mA calibration output stays as it was. Check 4-20 mA loop resistance. Repeat 4-20 mA calibration. The fault clears itself after a successful 4-20 mA calibration.