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V MAINTENANCE – FAULT FINDING
1. CHECKING THE SYSTEM
It is highly recommended, to carry out a complete maintenance on the FG-SYS twice per annum.
These tests make it possible to check the state of the circuits, with the sense cables, and to control the
correct operation of the FG-SYS Digital Unit; this will ensure a better operation and reliability in time,
for the system. These tests can be more frequently carried out in particularly exposed zones.
To activate the test procedure, and to carry out simulations for leaks and cable break, refer to the test
procedure (chapter IV):
- Check the state of the hold-down clips and their fixings
- Check the position of the sense cables and their plating on the ground.
- Check the presence of the labels (signal tags) for indication on the circuits of cables
- Check the connection of the cables on the FG-SYS Digital Unit
- Check the mechanical and physical state of the FG-SYS Digital Unit
- Check the exactly the hour and the date
A report/ratio of maintenance must be written after each intervention of maintenance. TTK UK Ltd.
proposes with each one of its customers a preventive maintenance contract comprising of two annual
visits.
2. MAINTENANCE OF THE SYSTEM
For any handling of the central processing unit, it is imperative to power the system down.
(Turn it off)
2.1 Replacement of a Sense Cable
The replacement of a sense cable is an easy and fast operation. Disconnect the two ends from the
cable and replace it with the new cable. A sense cable must be replaced if it is sheared or
contaminated too strongly. The traces of contamination in weak concentration on a small surface can
be cleaned. Before the replacement of a sense cable, it is necessary to turn the central processing
unit off. For replacement of a sense cable, it is imperative to activate the TEST procedure, by
pressing on the “T” key on the main keypad.
2.2 Precautions for Use and Storage
The sense cable is mechanically resistant but remains a sensitive cable; It is necessary to respect the
following procedures:
- Preserve the sense cables in their conditioning of origin in a clean and dry place.
- The installation of the sense cables must be carried out after other works on the building site are
finished.
- Protect the sense cables against any risk from shearing (falls of heavy and cutting tools), any contact
with heat sources or flames (welding, gas-fired warm air heater...), any contact with contaminant
liquids (painting, detergent, cement...)
- During the fixing of the clips on the ground, do not to use adhesive bands; they absorb moisture and
can set off alarms.
2.3 Addition of Sense Cables on an Existing Circuit
An extension of the FG-SYS Digital Unit implies either an addition of sense cables on a circuit of
existing cables (maximum capacity of 40 sense cables per circuit,) or the installation of a new circuit of
cables (see following paragraph). If you want to move sense cables, proceed in the same way.
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