Dissolved Oxygen Analyzer Aqualyzer® 9065
Troubleshooting and Technical Questions

Technical Service
Please call 800-242-7353 or 908-534-5100 and select option 2
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PROBLEM	POSSIBLE CAUSE	SOLUTION
Nothing is displayed on the screen when a button is pressed.	The power supply has not been connected. The power supply is in the safe mode (too hot).	Connect the power supply. Wait 10 minutes and turn the power supply back on.
The O2 value seems to be incorrect.	The temperature sensor is faulty.	Check whether a realistic temperature value is given. Check the O2 sensor using calibration gases and, if necessary, recalibrate it.
The message ‘O2 sensor does not react’ is displayed on the measurement screen.	An oxygen sensor has not been connected. The oxygen sensor is faulty.	Connect the oxygen sensor. Contact Waltron.


ERROR MESSAGE	CAUSE	SOLUTION
‘O2 high’	O2 value > set O2 ‘high’ alarm	Check the process. Change the ‘high’ level.
‘O2 high-high’	O2 value > set O2 ‘high – high’ alarm	Check the process. Change the ‘high – high’ level.
Sensor x, Temp high alarm	Temp value > set Temp high value	Check the process Change the ‘Temp high’ level
Sensor x, Temp low alarm	Temp value > set temp low value	Check the process Change the ‘Temp low’ level
Sensor x, not connected	No sensor is connected No communication is possible with the sensor	Connect the sensor
Sensor ‘INIT’ error	Not all the calibration data has been loaded into the control box	Connect the sensor to the control box and restart the control box.
Sensor x, NTC broken wire	NTC broken	Contact Waltron.
Sensor x, short circuit	NTC Short circuit	Contact Waltron.
Sensor x, calibration expired	The sensor has taken more then 1,000,000 measurements	The sensor must be recalibrated
Communication error	No sensor connected Sensor Broken Broken wire communication Cable Thermal shutdown sensor (> 65°C)	Check connection Reset 9065 Cool down the sensor
symbol appears in the display	The sensor has taken more then 1,000,000 measurements.	The sensor must be recalibrated.