Hach-Lange SIGMATAX2 - Manual (Page 37)

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Section 7 Troubleshooting
As soon as a fault leads to an interruption in operation, SIGMATAX 2 immediately
switches to service mode. Corresponding error messages are shown both on the
SIGMATAX 2 display and on the displays of the connected process photometers.
Service mode means that:
• The instrument is no longer in operational mode
• The sampling probe and sample storage vessel are empty
• The system is depressurized
• The sampling probe is closed
• The fault indication contact is held in the last valid position
• The instrument will not return automatically to operational mode
Error message Possible cause Measures
delivery error Sample line clogged
Select [clean.samp. tube]and carry out a full clean; if
necessary, blow air through the sample line using the
compressor. Inspect the upper level indication sensor.
Check the compressor in the [+FUNCTIONTEST]
menu
filling error Probe valve clogged
Remove probe, extract blockages and inspect the
probe valve and drain valve.
Sensor error Internal electrical cause Call customer service.