Hach-Lange SONATAX sc - Manual (Page 29)

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Section 6 Troubleshooting
6.1 Operating state LED
The sensor is equipped on the top side with an LED that provides
information on the operating state.
6.2 Error messages
In the case of an error, an error message is shown on the controller.
Find error messages and notes on the resolution of the errors in
Table 5 .
Figure 13 Operating state LED
1 Operating state LED
Table 4 Sensor status
Green LED No errors or warnings
Green/red flashing LED
Probe in operation, probe position deviates strongly from the perpendicular, the
measurement value is retained, there is no error
Red LED Error
LED off No device function
Table 5 Error messages
Error message Reason Resolution
SENSOR MEASURE
The PROFILE LIST and graphic on the sc1000
is less than the programmed value for
LL THRESH.AUTO. over the entire tank depth,
or the ultrasound transducer is contaminated or
not immersed.
Check device data, also the plunger depth,
floor depth and advanced settings, check
installation and remove contamination.
POS. UNKNOWN
The wiper position is not detected. The wiper is
in the central position (after a wiper change).
Start a wiping process
Defective light barrier plate Call service
Application with particles that block the wiper.
Cleaning of the ultrasound transducer and of
the wiper system.
AMPL DIAG Internal error Call service
MOIST Moisture value \> 10 Call service
SENSOR ANGLE
The probe is more than 20° from perpendicular
and for longer than 180 seconds.
Check installation
Incorrectly calibrated position sensor Call service
SYSTEM ERROR Faulty RAM Call service