Unitor UWI 203 TP, Инструкция по эксплуатации

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Revision date: 23 09 2014 Page 7 of 24
4 FRONT AND BACK PANEL
Description
1. Power on warning. Green light when the machine is connected and switched on.
2. Thermal protection activated. Yellow light indicates that the protection thermostat has cut the
output. Do not switch the machine off. The fan will be running and the thermostat resets
automatically when the machine has cooled down sufficiently. The light will darken when the
machine is live again.
3. Selection of welding process:
Up: SMAW (MMA) welding with stick electrodes
Down: GTAW (TIG) welding.
4. Welding current adjustment potmeter. Rotate knob clockwise to increase amperage,
minimum to 200 Ampere
5. Arc force increases the short circuit amperage providing a crisper arc, allowing the welder to
use very short arc without sticking the electrode in the melt pool. It is useful when welding
with stick electrodes at low amperages but gives more spatter. Set control to 0 (soft arc) for
normal electrode welding and TIG welding.
6. Active VRD signal. When lit this shows that the Voltage Reducing Device is active, reducing
the voltage across the welding sockets. This will happen within 2 seconds after the welding
arc is broken to protect the welder from electric chock.
Full arc striking voltage will automatically be re-established when the welding circuit is re-
established by touching the electrode to the work-piece.
7. On/Off switch (Back panel)
8. Primary cable, 4 core 2,5mm², 3m long.
9. Missing phase warning. Warning light indicates that one of the three phases in the power
supply to the machine has fallen out.
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