P40 Plasma Cutting Machine
9
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P a g e
(7)
Do not switch off the welder during welding!
(8)
Periodically maintain the machine and clean the dust inside.
7. Maintenance
Periodic maintenance is necessary for keeping the machine work properly.
WARNING
There are extremely dangerous voltage and power levels present inside this unit. Do not attempt
to diagnose or repair unless you have had training in power electronics measurement and
troubleshooting techniques. DISCONNECT POWER INPUT AND SWITCH OFF THE MAIN
POWER SWITCH BEFORE START OF MAINTENANCE.
Regular Check and Inspection
6 Month Routine Maintenance
•
Replace unreadable labels.
•
TIG-Clean spatter inside the nozzle when
continuously use the machine
•
TIG-Check and change broken parts in the torch
to avoid damage to the torch and machine.
•
Check the function of all switches.
•
Check if the fan rotates properly and if there is air
venting out from back of the machine.
•
Pay Attention to the abnormal vibration, noise,
smell and gas leakage during operation.
•
Check if the welding cables are over heated.
•
Check if the cable connections are over heated.
•
Check if the cable is connected firmly and
properly, if it is broken and cause bad insulation.
•
Check the cover grounded properly.
•
Blow out with dry clean pressure air or vacuum
inside machine, especially transformer coil and
power component.
•
Check the electric connection of input/output bar
to avoid bad contact caused by loose or rusted
screw.
•
Check the contactors and relays in the machine or
on the PCB work properly.
•
Calibrate the current meter.
•
Check the resistance between machine case and
main circuit, if the value is smaller than 1M
Ω
,
sent the machine to an authorized warranty depot
to inspect and repair immediately.
8. Troubleshooting & Service
The following operations require the operator has sufficient electrical expertise and
comprehensive safety knowledge, the operator can demonstrate its capacity to be held valid
qualifications and knowledge Documents.
Common Faults and exclusion method:
