Troubleshooting and Repair
41
Waltron User Manual
9065 Luminescent Dissolved Oxygen Analyzer
8
TROUBLESHOOTING AND REPAIR
8.1
TROUBLESHOOTING
Problem
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 O
2
value seems to be
incorrect.
The temperature sensor is
faulty.
Check whether a realistic temperature
value is given.
Check the O
2
sensor using calibration
gases and, if necessary, recalibrate it.
The message ‘O
2
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.
8.2
ALARM MESSAGES
Error message
Cause
Solution
‘O
2
high’
O
2
value > set O
2
‘high’
alarm
Check the process.
Change the ‘high’ level.
‘O
2
high-
high’
O
2
value > set O
2
‘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
than 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
than 1,000,000
measurements.
The sensor must be recalibrated.
O
2