FAULT CODES
0740 801 028
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© ESAB AB 2017
Unit (Node id)
2= Power source 6 = Motor control board
3 = Wire feed unit 8 = Welding data unit
4 = Remote control unit
Error code description
This manual describes the error codes for the PEK. The error codes for other units are
described in the manuals for these units.
Code Description
1 Program memory error (EPROM)
The program memory is damaged. This fault does not disable any functions.
Action: Restart the equipment. If the fault persists, update the unit with new control
program software. If the fault still persists, replace circuit board 1AP1 that carries the
memory chip.
2 Microprocessor RAM error
The microprocessor is unable to read/write from/to a particular memory address in its
internal memory. This test is preformed only as part of initiation after power-up. This
fault does not disable any functions.
Action: Restart the equipment. If the fault persists, replace the welding data board
1AP1.
3 Error in the external RAM
Read/write test of the processor's external RAM. This test is performed only on
initiation after power-up. The microprocessor is unable to read/write from/to a
particular memory address in its external memory. This fault does not disable any
functions.
Action: Restart the equipment. If the fault persists, replace the welding data board
1AP1.
4 +5V power supply too low
The unregulated power supply voltage for the processor is too low: the smoothing
capacitors cannot keep the voltage up enough for the processor to continue to
operate. The processor stops all normal activities, expecting to be shut down.
Action: Turn off the mains power supply to reset the unit. If the fault persists, check
the power supply to circuit board 1AP1.
6 High temperature
Error code from external source
Action: Check manual for connected units
7 Low current
Error code from external source. To low current detected during 0.3 sec and welding
is interrupted.
Action: Check if something obstruct the welding arc, check for faulty cables. Check
manual for connected units
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