ABB AW101

Water Hardness Analyzer
AW101 Testomat 7 Further Information
IM/AW101 Rev. C 15
7 Further Information 8 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 when:
 the programmed maintenance date has been reached
(display maintenance date exceeded)
 the unit displays the error messages: MF.DIRTINESS or
REAGENT LOW
 the last maintenance was carried out more than 6 months
ago.
Observe the safety rules when handling cleaning agents.
If the measuring range has been exceeded over an extended
period, a colored coating can form on the sight-glass windows.
This stubborn coating can be removed easily with alcohol.
8.1 Description of Maintenance Work
Cleaning the measuring chamber and the sight-glass windows:
1. Switch the unit 'off' or press the STANDBY key (drain the
measuring chamber completely).
2. Close the hand-operated valve on the sample line to the
AW101.
3. Unhook the toggle-type fastener, tip the measuring
chamber upwards and extract.
4. Slacken both sight-glass window holders, extract and
clean the sight-glass windows. Stubborn coatings can be
removed easily with alcohol.
5. Clean the measuring chamber with 10% hydrochloric acid
and then rinse well.
6. 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).
7. Insert the measuring chamber by tilting it backwards until
the slot engages with the rear guide bar and press down.
8. Secure the chamber with the toggle type fastener.
Fault Possible causes Remedies
Interface
works
incorrectly
Incorrect measuring value at
the output or no power
supply
Max. load
exceeded
Although
unit is
switched
ON, No
display
Fuse F9, F5 or F2 (240 V: F1)
defective
Replace fuses
Power switch defective
Replace power
switch
Multi-pin strap cable at
display circuit board or base
circuit board loose contact
Check and
reconnect
Fault on display circuit board
or base circuit board
Replace display
or base circuit
board
Note. Never use organic solvents to clean the measuring
chamber and other plastic parts!