Model 580A
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5.3 Fault Codes
In addition to the Fault LED on the front panel, the Model 580A provides a Fault Code on
the digital display whenever a fault condition occurs. The Fault Codes that can appear on
the digital display are
FAULT
CODE
DESCRIPTION
SOLUTION
HI
High Supply Voltage
Make sure the supply voltage level is within
specification limits.
LO
Low Supply Voltage
Make sure the supply voltage level is within
specification limits.
SE
Sensor Failure
Sensor connections are open or short circuited or
there is excessive zero drift.
Make sure the sensor wires are connected
properly (in the field and at the rear of the unit)
and recalibrate if necessary. If this fault
continues to occur, replace the sensor.
F1
Channel Select Button
Malfunction
If the fault occurs, consult the factory or your GMI
Representative.
F2
Failed to Complete
Calibration
If this fault occurs, remove the gas and expose
the sensor to clean air for at least five minutes.
Then attempt another calibration. If the second
attempt fails, replace the sensor. If this fault
continues to occur after the sensor has been
replaced, consult the factory or your GMI
Representative.
F3
Software Checksum Error
This fault occurs during initial power-up of the
unit. If this fault occurs, remove and reapply
power to the unit. If the fault continues to occur,
consult the factory or your GMI Representative.
F5
Reset Button Malfunction
If the fault occurs, consult the factory or your GMI
Representative.
F6
Mode Select Button
Malfunction
If the fault occurs, consult the factory or your GMI
Representative.
F7
EEPROM Verification Error
for Calibration Storage
If the fault occurs, consult the factory or your GMI
Representative.
F8
EEPROM Verification Error
for Setup Storage
If the fault occurs, consult the factory or your GMI
Representative.
F9
Calibration Check Period
Exceeded
If the calibration checks gas is left on the sensor
for more than 6 minutes, this fault occurs.
Remove the gas and expose the sensor to clean
air.
Table 8: Troubleshooting Table
