Table 9-4: Alarm Relay Event Groups
Alarm relay event Alarms/conditions
In calibration Calibration in progress
O
2
temperature error Oxygen sensor heater temperature low (O2
Temp Low)
Oxygen sensor heater temperature high
(O2 Temp Hi, O2 Temp Very Hi)
Resistance temperature device (RTD)
excitation current error (Ref Curr Err)
Heater failure Oxygen sensor heater could not reach final
temperature (O2 Htr Failure)
Combustibles sensor heater could not
reach final temperature (COe Htr Failure)
Sample block heater could not reach final
temperature (SB Htr Failure)
O
2
sensor error Oxygen sensor resistance high (O2 Sensor
R High)
Oxygen sensor disconnected (O2 Sensor
Open)
Calibration failure Calibration failed (Cal Failed)
Calibration warning Calibration warning (Cal Warning)
Board temperature high Electronics temperature maximum
exceeded (Board Temp Hi)
Unit failure Any non-recoverable or heater relay off
alarm (O2 Temp Hi, O2 Temp Very Hi, COe
Temp Hi, COe Temp Very Hi, SB Temp Hi,
SB Temp Very Hi, O2 Htr Ramp Rate, COe
Htr Ramp Rate, SB Heater Ramp Rate, O2
TC Shorted, O2 TC Reversed, COe TC
Shorted, COe TC Reversed, SB TC Shorted,
SB TC Reversed, ADC Failure, ADC Ref
Error, Board Temp Hi, EEPRM Chksm Fail,
Line Freq Error, Line Voltage Low, Line
Voltage Hi, Htr Relay Failed, Out Brd Fail)
Sample block temperature error Sample block heater temperature low (SB
Temp Low)
Sample block heater temperature high (SB
Temp Hi, SB Temp Very Hi)
RTD excitation current error (Ref Curr Err)
COe sensor temperature error Combustibles sensor heater temperature
low (COe Temp Low)
Combustibles sensor heater temperature
high (COe Temp Hi, COe Temp Very Hi)
RTD excitation current error (Ref curr Err)
Troubleshoot Manual
December 2022 00809-0500-4880
234 Emerson.com/Rosemount
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