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a chamber, close the corresponding shut-off valves and, depending on the requirement, empty or
vent the chamber.
3.
Loosen the flange connection and remove the switch.
4.
Check the float and mechanism for damage and contamination.
5.
Remove deposits and metal particles by means of suitable and approved methods. Care must be
taken to ensure that no mechanical damage occurs as a result of the cleaning.
6.
In the case of floats with protective bellows, the bellows must be removed before cleaning and
should be cleaned separately, both internally and externally.
7.
Check the float and mechanism for complete deflection, as well as for smooth and unrestricted
operation.
8.
In the event that it becomes necessary to replace individual components, please note that only
original spare parts, split pins, float, switch module, etc. may be installed.
9.
After completion of the cleaning / inspection work, the switch module must be checked for correct
function by means of an acoustic continuity tester or similar device with simultaneous deflection
of the float, followed by recording in the inspection log book.
10. In order to guarantee the absence of leaks between process vessel / float chamber, the flange
seal must be replaced after each dismantling.
11. After carrying out the inspection work, the device is re-fitted at the intended location.
8.
Malfunctioning and Troubleshooting
The fault descriptions and notes on the possible cause are based on the assumption that the compo-
nents have been correctly installed and connected.
Malfunctioning
Level switch does not
switch
Level switch does not
switch
Level switch does not
switch
Level switch does not
switch
9.
Replacing of the switch module
Defective controller modules must be replaced with new, works-tested units. In order that the com-
plete type designation can be stamped on the type plate, the complete designation of the existing con-
troller must be specified at the time of ordering. If a complete identification of the controller is not pos-
sible, then the manufacturer should be consulted before dispatching the complete device.
Example:
Complete type number of the switch
Incomplete data of replacement switch module
Complete the type number with 01 04
In the case of uncertainty on any point, please contact the local Trimod Besta agent or the manufac-
turer.
Further information see operating instruction LTI004X «Switch module replacement»
www.trimodbesta.com
Possible cause
No mains voltage
Float jammed, no full
deflection
Float damaged
Proximity switch dam-
aged
16 │ 46
Remedy
- Check mains voltage supply line.
- Loosen flange connection and remove the level
switch.
- Remove deposits and metal particles by means
of suitable and approved methods.
- Care must be taken to ensure that no mechani-
cal damage occurs as a result of the cleaning.
- Loosen flange connection and remove the level
switch.
- Remove the float and check for damage.
- If filled with medium, it is defective
► Replace float
- Function of switch module must be checked by
means of an acoustic continuity tester or similar
device.
- If defective ► Replace the switch module
I 01 04
I
►
I 01 04
LTB008X │ 2023/01
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