Fault Tracing - ESAB Aristotig 255 LTN 255 Instruction Manual

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Press one of the buttons and the power source returns to the normal operating
mode. The set Arc Force value remains. Different Arc Force settings can be stored in
the machine's two sets of welding data memory.
Pulse time/Pause time (TIG)
Normally the setting range for these parameters is 0.02--5.0 s. Through pressing the
two green arrows simultaneously for 2 seconds, times down to 0.001 s can be set.
This extended setting range remains until the machine is reset using the same
method. When activating the function the machine should be in the mode for setting
the pulse time/pause time. Note that times below 0.250 s are displayed without the
decimal point.
Remote control
Using the remote control socket on the machine the current can be remotely regu-
lated in TIG and MMA modes.
If pulsed current is selected in TIG mode, it is the pulsed current that is remotely
regulated. The set value from the remote control is shown on the display by stepping
to the position where the current should be set when not using the remote control.
Switching to the remote mode takes place automatically when the unit is connected.
This is confirmed by the LED coming on.
(NOTE! the pins L and M in the remote control's connecting plug must be strapped
for automatic connection to take place).
NOTE!
When using FS002 the slope--up and slope--down times should be set to 0 sec.
6.3

Fault tracing

Error Codes
LTN 255 is equipped with integrated error monitoring. If an error should occur then
an error code is displayed. The error codes are as follows:
E01 Memory error, internal RAM
E02 Memory error, external RAM
E03 Memory error, EPROM
E04 Memory error, random test of battery backed up RAM
E05 Memory error, variable value outside limit in battery backed up RAM
E06 Low battery voltage
E10 Incorrect supply voltage 20 V
E11 Incorrect supply voltage --15 V
E13 High temperature, thermal switch protection
E14 Current--servo error
The error indications are shown if the machine is not able to maintain the set
current, for example, while MMA welding with an extremely long arc. The
indication should disappear after welding for a few seconds under normal
conditions.
If any of these error codes are displayed permanently or recur frequently the ma-
chine should be taken to an authorized ESAB service workshop to be rectified.
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