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3) WARNINGS, PRECAUTIONS, GENERAL
INFORMATION ON EXECUTING REPAIRS
lmminent danger of serious bodily harm and dange-
rous behaviours that may lead to serious bodily
harm.
lmportant advice to be followed in order to avoid
minor injuries or damage to property.
The notes preceded by this symbol are mainly tech-
nical and facilitate operations.
Behaviour linked expressly to HF striking, which
might result in minor injuries or damage to property
(especially measuring instruments).
Repairs may be executed by qualified personnel only.
Before attempting any repairs, we advise you to read and
understand the information in this manual, especially in regard
to safety recommendations.
Do not carry out any repair unless another person is present
who can provide help in case of an accident.
To repair equipment, access is necessary to the internal parts
of the machine, and to obtain this, some protective panels
have to be removed. Therefore, some extra precautions are
necessary, over and above those applying to normal use of the
machine for welding, in order to prevent any damaged caused
by contact with:
- Live parts
- moving parts
- parts at high temperature
- Live parts:
WARNING!: When accessing parts inside the machi-
ne, remember that turning off the switch will not
prevent the danger of electric shocks. We therefore
advise you to remove the plug and wait for about a
minute before attempting any job.
Further, as capacitors charged with high voltage may be present,
wait about a minute before working on the internal parts.
WARNING!: When taking measurements, remember
that the measuring instruments themselves can
become live and, therefore, do not touch their metal
parts.
WARNING!: When TIG mode is selected with HF
start, the machine generates a series of high-voltage
pulses (approx. 10,000 V) to strike the welding arc.
Consequently, when diagnostic phases do not expressly inclu-
de an arc striking test in TIG mode with HF discharge, you are
recommended to disconnect board 15.14.286.
Once repairs are done, remember to reconnect board
15.14.286 before closing the machine case for the last time,
and then perform a number of welding tests, including a num-
ber of starts in TIG HF mode.
4
- Moving parts:
WARNING!: Keep your hands well away from the
fan when the machine is connected to the power
supply. Make sure that the power plug is removed
and that the fan is idle before replacing it.
- Parts at high temperature:
WARNING!: When you have to handle internal parts
of the machine, remember that some could be at
high temperature. In particular, do not touch cooling
radiators.
WARNING!: To avoid damaging the cooling unit,
always fit the bypass pipe when the torch is not con-
nected to the coolant inlet/outlet.
Warnings, precautions, general information on executing repairs
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