Jasic MIG 350P, Manual

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27
During transportation and storage -25℃
～
+55℃
Remark: when using the radiator, please avoid using or storage under coolant’s solidification temperature.
Please make sure there is no coolant left in the radiator for storage under low temperature.
b) Relative air humidity: less than 50% when under 40℃; less than 90% when under 20℃.
c) The dust, acid and corrosive gas and matters in the air cannot exceed normal standard, excluding those
matters generated from normal welding.
9) Do not use this machine for pipe unfreezing.
10
）
don’t let hand, hair or other tools to contact live parts when machine is powered on, eg, fan, so that to avoid any
injury or machine damage.
11
）
avoid water or vapour entering machine inside; in case it happens, please dry the machine internal structure.
Then use a mega-meter to test machine’s insulation (including wire to wire connection and wire to machine enclosure
connection.). Welding can be resumed only after the confirmation of no abnormity.
12) There are rated duty circle for both machine and torch. Please do not over-load them.
13) Please use proper welding cable: when cable size is too small, there will be insufficient current, therefore,
unstable arc; there is no output rating and cable can be easily burned.
14) Please guarantee the connection is correct; please pay attention to polarity during connection.
15) Water cooling torch: please make sure coolant pressure and water flow is under 1-2kg/cm
2
so that to avoid
burning the torch. Even under low current welding, the torch needs to be water-cooled, or else no welding can be
carried out.
16) Unblocked gas pipe and water pipe: torch burnt and welding defect might be caused if there are heavy items
being placed on water pipe or gas pipe, or the pipes are bent and there is no gas flow and water flow.
17) Take good care of the torch: inappropriate torch operation can cause wire disconnection, water-leak, gas leak or
nozzle failure.
18) There might be gas leak or lack of gas flow on torch nozzle if flowmeter or gas pipe connection is not tight
enough, which might affect gas protection effects and cause weld porosity. Please check if there is any gas detection with
soap-suds.
19) Reliable grounding: please make sure the ground connection between machine and power supply, machine and
torch, electrode holder, wire feeder, ground cable; all control cables have to be well connected. If there is any poor
connection, failure might be caused, which in return brings machine abnormity, burnt or other failures.
20) Connection with workpiece: if people use steel plate and steel bar to replace the cable which connecting the
workpiece, the resistance is large and welding current is not stable; moreover, over-heat can easily cause fire hazard.
Please use correct insulation cable and workpiece for reliable connection.
21) Please pay attention to anti-wind measure if there is wind in the working environment. Or protective gas can be
blown away and weld porosity can be caused.
22) Welding workpiece surface has grease, rust, paint, water or other items or pollution. Please remove them, or else
weld porosity and crack can be cause and it will affect welding effects.
Warning! Over-current/over-voltage/over-heating protection circuit is installed in this
machine. When the network voltage, output current or inner temperature exceeds the
setting standard, the machine will stop working automatically. However, excessive
operation (over voltage) will lead to welder damage.
6.2Maintenance
Warning! All of the maintenance must be carried out after power source is
disconnected completely. Please check and confirm the power source plug has already
unplugged before opening housing case.
1) Periodical cleaning of internal dust: too much dust will lower the machine’s insulation performance and can have
direct threats to human safety and machine safety. Pleas have at least twice cleaning each year. If the machine is