Lincoln Electric INVERTEC 175TP Service Manual page 9

2. Pedal Operated Remote Control:
this mode is especially useful in combination with pedals
equipped with a micro switch with a trigger function.
This selection involves inhibition of the up and down
slopes. Welding current can be adjusted with the pedal
between the minimum value and the panel setting.
The micro switch in the control pedal means you can start
welding by simply pressing the pedal, i.e. without using the TIG
torch but-ton. To use this peripheral device properly and
comfortably selection of "four stroke" mode is recommended.
NOTE: IN THIS MODE, WHEN THE WELDING PROCESS IS
NOT ACTIVE, USING THE REMOTE CONTROL (PEDAL) WILL
PRODUCE NO CHANGE IN THE CURRENT INDICATED ON
THE DISPLAY.
10.0 MAINTENANCE
IMPORTANT: DISCONNECT THE POWER PLUG AND
WAIT AT LEAST 5 MINUTES BEFORE CARRYING OUT
ANY MAINTENANCE.
TYPES OF MALFUNCTIONING
WELDING FAULTS
The generator does not weld: the digital switch B) The power lead is interrupted (lack of one or two B) Verify and repair.
is not lit.
During welding suddenly the outgoing current is Overheating has occurred and the automatic
interrupted, the orange led goes on.
Welding power reduced.
Excessive jets.
Craters.
Inclusions.
Inadequate penetration.
Sticking.
Blowing and porosity.
Jacks.
The electrode fuses in TIG.
MAINTENANCE MUST BE CARRIED OUT MORE
FREQUENTLY IN HEAVY OPERATING CONDITIONS.
Carry out the following operations every three (3) months:
- Replace any illegible labels.
- Clean and tighten the welding terminals.
- Replace damaged gas tubing.
- Repair or replace damaged welding cables.
- Have specialized personnel replace the power cable if
dam-aged.
Carry out the following operations every six (6) months:
- Remove any dust inside the generator using a jet of dry air.
- Carry out this operation more frequently when working in
very dusty places.
POSSIBLE CAUSES
A) The main switch is off.
phases).
C) Other.
protection has come on. (See work cycles).
Outgoing wires are not correctly attached.
A phase is missing.
Welding arch too long.
Welding current too high.
Fast removal of the electrodes.
Inadequate cleaning and bad distribution of
coating.
Faulty movement of the electrodes.
Forward speed too high. Welding current too low.
Welding arch too short.
Current too low.
Damp electrodes. Arch too long. Wrong torch
polarity.
Currents too high. Dirty materials.
Wrong torch polarity. Type of gas not suitable.
9
CONTROLS AND REMEDIES
A) Switch on mains.
C) Ask for the intervention of the Assistance Centre.
Keep generator switched on and wait till temperature
has dropped again (10-15 minutes) to the point where
the orange switch goes off again.
Check that wires are intact, that the pliers are
sufficient and that they are applied to welding surface
clean from rust, paint or oils.
Wrong torch polarity, lower the current values.
Increase current values.