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Further information
Fault
Possible causes
Remedies
Interface works incorrectly
• Incorrect measuring value at the output or no
power supply
S
Replace fuse F7
S
Replace the plug-in circuit board
Although unit is switched
"ON"
No display
• Fuse F9, F5 or F2 (240 V: F1) defective
• Power switch defective
• Multi-pin strap cable at display circuit board or
base circuit board loose contact
• Fault on display circuit board or base circuit
board
S
Replace fuses
S
Replace power switch
S
Check and reconnect multi-pin strap cable
S
Replace display or base circuit board
Maintenance
Regular maintenance is necessary in order to ensure trouble-free operation of the unit!
Please carry out the maintenance work described in the following section if
S
the programmed maintenance date has been reached (display "maintenance date exceeded")
S
the unit displays the following error messages:
"Mf. dirtiness" or "Reagent low level"
S
the last maintenance was carried out more than 6 months ago
Never use organic solvents to clean the measuring chamber and other plastic parts!
Please observe the safety rules when handling cleaning agents!
Description of maintenance work
Cleaning the measuring chamber and the sight-glass windows
1. Switch the unit 'off' or press the "STANDBY" key (drain measuring chamber completely!).
2. Close the hand-operated valve on the branch line to the Testomat
®
2000 THCl.
3. Unhook toggle type fastener, tip the measuring chamber upwards and extract.
4. Slacken both sight-glass window holders, extract and clean the sight-glass windows.
5. Remove coating from the sight-glass windows.
6. Clean the measuring chamber with 10% hydrochloric acid and then rinse well.
7. After cleaning, replace the sight-glass windows and secure these with the sight-glass windows holder
(do not forget the O-ring seals and check for correct seating in the recess).
8. Insert the measuring chamber by tilting it backwards until the slot engages with the rear guide bar and press down.
Finally secure the chamber with the toggle type fastener.
Cleaning the filter housing
1. Close the hand-operated valve on the branch line to the Testomat
®
2000 THCl.
2. Undo the hose connections to the filter housing.
3. Unscrew inlet connection, remove sealing ring, spring and filter strainer and clean.
4. Extract the retaining pin and withdraw the flow regulator and finally remove the valve
body.
5. Clean filter housing with water or alcohol and reassemble.
Insert filter strainer point downwards!
6. Install the hose connections to the filter housing.
Water leakage from the seals can result in damage to parts of the unit.
T
Tip: Please check the unit for leaks before carrying out the first analysis
1. Switch the unit to STANDBY
2. Manually fill the measuring chamber
3. Manual reagent dosing (key "Manual")
4. Check the connections and seals for leaks
Notes on unit care
The surface of the unit has not been treated. Therefore, a contamination with reagent, oil or grease should be avoided.
Should the housing, however, be contaminated, please clean the surface with isopropanol (never use other solvents).
