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Troubleshooting and Repair
8 TROUBLESHOOTING AND REPAIR
TROUBLESHOOTING
8.1
Problem
Nothing is displayed on the
screen when a button is
pressed.
The O
value seems to be
2
incorrect.
The message 'O
sensor
2
does not react' is displayed
on the measurement screen.
ALARM MESSAGES
8.2
Error message
'O
high'
2
'O
high-high'
2
Sensor x, Temp high alarm
Sensor x, Temp low alarm
Sensor x, not connected
Sensor 'INIT' error
Sensor x, NTC broken wire
Sensor x, short circuit
Sensor x, calibration
expired
Communication error
symbol appears
O
in the display
2
41
Cause
The power supply has not
been connected.
The power supply is in the
safe mode (too hot).
The temperature sensor is
faulty.
An oxygen sensor has not
been connected.
The oxygen sensor is faulty.
Cause
'high'
O
value > set O
2
2
alarm
'high –
O
value > set O
2
2
high' alarm
Temp value > set Temp high
value
Temp value > set temp
low value
No sensor is connected
No communication is
possible with the sensor
Not all the calibration data
has been loaded into the
control box
NTC broken
NTC Short circuit
The sensor has taken more
than 1,000,000
measurements
No sensor connected
Sensor Broken
Broken wire communication
Cable
Thermal shutdown sensor
(> 65°C)
The sensor has taken more
than 1,000,000
measurements.
Solution
Connect the power supply.
Wait 10 minutes and turn the power supply
back on.
Check whether a realistic temperature
value is given.
Check the O
sensor using calibration
2
gases and, if necessary, recalibrate it.
Connect the oxygen sensor.
Contact Waltron.
Solution
Check the process.
Change the 'high' level.
Check the process.
Change the 'high – high' level.
Check the process
Change the 'Temp high' level
Check the process
Change the 'Temp low' level
Connect the sensor
Connect the sensor to the control box and
restart the control box.
Contact Waltron.
Contact Waltron.
The sensor must be recalibrated
Check connection
Reset 9065
Cool down the sensor
The sensor must be recalibrated.
9065 Luminescent Dissolved Oxygen Analyzer
Waltron User Manual
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