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8. Troubleshooting
8.1. Fault List
[Table 5. Fault List]
FAULT MESSAGE
DESCRIPTION & CONDITION
CAUSE
FAULT2
"SEN HIGH"
Sensor output is above ADC max. value.
Defective sensor module or transmitter board
ADC
FAULT3
"SEN LOW"
Toxic sensor output is below ADC min. value.
Defective sensor module or transmitter board
ADC
FAULT4
"EROM ERR"
Defective Transmitter EEPROM Checksum
Defective Transmitter board EEPROM
FAULT5
"+24V LOW"
It occurs when 24 V main input power is inputed
with voltage below 17V.
Input power below 17 V or defective Transmitter
ADC
FAULT6
"ADC FAIL"
Defective Transmitter ADC
Defective Transmitter ADC
FAULT7
"H/W REV"
H/W Version Error
Defective MPU inside Transmitter
FAULT8
"SEN HUNT
When there is repeated hunting error in gas
measurement, sensor output status may be poor
or check for input power noise.
8.2. Recovery List
[Table 6. Recovery List]
No
CAUSE
SOLUTION
1
Defective Sensor Module
Change Sensor
2
Defective Transmitter Board ADC
Change Transmitter Board
3
Defective Transmitter Board EEPROM
1) Perform Factory Initialization then correct parameter and re-calibrate
2) Change sensor unit when the same problem occurs again
4
Defective MPU inside Transmitter
Change Transmitter Main Board
5
Poor Sensor Output Status
Change Sensor
6
Check Input Power Noise
Check External Input Voltage Noise Status