CONTROLS & THEIR FUNCTIONS

1. POWER OUTPUT INDICATOR

When lit, this LED indicates that power is available for cutting.

2. ALARM INDICATOR

When lit, this LED indicates that one of the alarms has triggered. At the same time the digital display (Ref. 3) shows the type of alarm, as shown in the table below, with instructions\for correcting the problem. In this condition the unit does not supply current.

3. DIGITAL DISPLAY

This display operates in a number of ways:

Display Volts or Amps – by pressing the V/A switch (5), you can read the voltage or amperage at the torch. This is a momentary display

Display Air Pressure – By pressing the bar switch (6) you can read the operating air pressure of they system.

Error/Alarm Indications – If an error is present, the display will light showing the code of the error. The codes are shown below:

DISPLAY

ERROR or PROBLEM

CORRECTION/RESET

 

 

 

- - -

Insufficient input voltage

 

 

 

 

CUP

The nozzle cap is not properly

Turn the unit OFF. Tighten the nozzle

 

screwed on the torch

cap on the torch correctly and turn the

 

 

unit back ON

 

 

 

HtA

Unit is overheating

Stop cutting – allow the unit to cool down.

 

 

Alarm will reset after the unit has cooled

 

 

down.

 

 

 

ThA (Flashing)

Unit is approaching

Stop cutting – allow the unit to cool down.

 

overheating

Alarm will reset after the unit has cooled

 

 

down.

 

 

 

Air

Insufficient air pressure

Adjust air regulator to increase pressure.

 

 

Check incoming air line.

 

 

 

ScA

Short circuit in output of unit

Turn the unit OFF and turn back ON to

 

 

reset

 

 

 

LSF

Arc blow out

Check wear on electrode and nozzle.

 

 

Replace if worn. If alarm continues, cycle

 

 

the unit off and on.

 

 

 

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Schumacher 120V manual Controls & Their Functions, Display, Correction/Reset, Cup, Lsf