Fig.1 fig.2, Fig.4 fig.3 – Sealey PP40H User Manual

Page 4

DO NOT make the earth connection to the part of the workpiece that will be removed.

4.5.

Isolation switch (see safety instructions for supply connection)

The I/O (on/off) switch is located at the rear of the machine (fig.2) and the switch will illuminate when switched on. A green LED will

also illuminate on the front panel (fig.1) indicating that mains power is present and the machine is in the ‘ready’ condition. The

control and duty circuits are now live but the torch will remain in ‘stand-by’ mode until the air supply is connected and the torch

button is pressed.

4.6.

Cutting regulator

The cutting current is regulated by the knob/potentiometer on the front panel (fig.1).

4.7.

Torch control

When the machine is turned on, the green indicator light (fig.1) will show that the torch is in “Stand-By” mode.

4.7.1.

When the torch button is pressed the machine is activated and a red LED will illuminate (fig.1) indicating the presence of the pilot

arc. As a safety feature, should the following situations arise, the torch will automatically de-activate:

a) During Post-Air (>30sec) phase.

b) If the pilot arc is not moved to the workpiece within 2 seconds.

c) If the cutting arc is interrupted because the torch is held too far from the workpiece, or if the electrode is worn out, or if the torch

has been forced away from the workpiece.

d) If the warning LED illuminates indicating either mains voltage fluctuation or overheating.

4.8.

Thermal switch and mains voltage fault

If the yellow LED (fig.1) on the front panel illuminates this indicates a mains voltage or thermal problem and the machine will be

automatically shut down as a result of one of the following:

a) The power transformer has overheated.

b) There has been a decrease or increase in the mains voltage supplied to the machine.

When the safety switch is activated in this way the problem is normally self-rectifying, and dependant upon duty cycle time, see

rating plate in section 9. The switch will re-set and the LED will go out and the machine is then ready for use again.

4.9. Torch

Although the machine and torch may be fully powered, the torch button is the only way to activate the cutting process.

4.9.1.

To turn the cutting process on, the torch button must be fully depressed.

4.9.2.

Release the button and the cutting cycle will stop immediately. The cooling air (post-air) will continue to flow for a further 30

seconds.

Note: To minimise the possibility of accidental starting, the button must be pressed for at least 1/5 of a second before the cutting

operation will start.

fig.1

fig.2

Original Language Version

PP40H Issue: 1 - 08/05/13

"+"

workpiece

Torch

connections and
"-"

I/O Switch

Power cable

Regulator

Air supply

Fan cover

Torch red LED

Warning

temperature

amber LED

Low air pressure

amber LED

Current adjust

Pressure gauge

Power on

green LED

Air line

connection

to torch

3 pin connection

Pilot arc

connection

Work piece

connection

fig.4

fig.3

Parts identification for Fig.1 and Fig.2

Handle

Pneumatic hose

"+"

lead

Torch pneumatic

hose, pilot arc

connection and

3 pin plug lead