Troubleshooting
COM280
30
Hauser
COY381-FRL electrolyte and cleaner set
• Order No. 50081036
COY31-PF abrasive foil
• Order No. 51506973
15
Troubleshooting
15.1 Troubleshooting instructions
If any of the following problems occur, test the measuring instrument in the order indicated.
15.2 Return
If the unit requires repair, please send the measuring instrument and sensor
cleaned
to your local
sales center.
Please use the original packaging when returning the instrument.
Please enclose the duly completed "Declaration of Contamination" (copy the second last page of
these Operating Instructions) with the packaging and the transportation documents.
The in-
strument cannot be repaired if a duly completed Declaration of Contamination is not
provided!
15.3 Disposal
The instrument contains electronic components and must therefore be disposed of in accordance
with regulations on the disposal of electronic waste.
Please observe local regulations.
Problem
Cause
Remedial action
Sensor in air,
instrument displays 0.0 mg/l or
0 % O2
Sensor not connected correctly
Connect the sensor correctly
Cable defective
No electrolyte in membrane cap
Fill with electrolyte or replace electro-
lyte.
Sensor cannot be calibrated
Buildup on the membrane
Replace the membrane cap
Electrolyte used
Replace electrolyte
Sensor cannot be calibrated
despite having replaced the cap
Buildup on the working electrode
Clean the working electrode
Incorrect temperature displayed
Temperature sensor defective
Send in sensor for repair
