
Multi 3400i What to do if...
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6.2 Oxi system messages
Error message 0FL
0FL0FL
0FL
Error message E3
E3E3
E3
Error message E7
E7E7
E7
AR flashes
continuously
Cause Remedy
Display range exceeded
Oxygen sensor
– Not connected – Connect the probe
– Cable broken – Replace probe
– Depleted – Replace probe
– Short-circuit between gold and
lead electrode
– Clean probe and replace it if
necessary
Cause Remedy
Invalid calibration
Oxygen sensor
– Electrolyte solution depleted – Regenerate probe
– Membrane contaminated – Clean membrane
– Electrode system poisoned – Regenerate probe
– Worn out – Replace probe
– broken – Replace probe
Cause Remedy
Membrane damaged
– Membrane damaged – Regenerate probe
– Membrane head not screwed
on tight enough
– Screw membrane head tight
Cause Remedy
No stable measured value
– Membrane contaminated – Clean membrane
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