5.3
SECTION 5. FAULT FINDING AND REPAIR
NOTE: Repair of the analyser should be done by qualified personnel who are familiar with
good workshop practice and the requirements for repairing certified equipment.
Any spare parts which are used should be as specified by Servomex.
ELECTRICAL SAFETY WARNING
The electrical power in this equipment is at a voltage high enough to
endanger life.
Before carrying out maintenance or repair, persons concerned must ensure
that the equipment is disconnected from the electrical power supply and
tests made to verify that the isolation is complete.
Also ensure that power is disconnected from external circuits connected to
the analyser, eg., alarms.
When the supply cannot be disconnected, functional testing, maintenance
and repair of the electrical units is to be undertaken only by persons fully
aware of the danger involved and who have taken adequate precautions.
HAZARDOUS AREA
If the analyser is installed on a hazardous application the area must be made
safe and shown not to contain explosive or flammable gases before covers
are opened or work done on the equipment.
In the event of an analyser failure first ensure that any sampling system is in good condition, that
filters, etc., are not blocked with dirt or condensation and that calibration gases are correctly
connected and flowing.
Make a visual inspection of the analyser and associated equipment for loose or broken electrical
connections or pipework.
This part of the manual is divided into 4 major sections:-
Section 5.1 Flow charts for diagnosing faults. By means of simple tests it should be possible
to identify a faulty board or assembly.
Section 5.2 More detailed tests on certain assemblies which can be done if facilities are
available.
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