ESAB Arc 4000i Service Manual page 53

Code Description
22 Transmitter buffer overflow
The control board is unable to transmit information to the other units at a sufficiently high
speed.
Action: A break in the bus line can cause this fault. Check the CAN cabling. Turn off the
mains power supply to reset the unit.
23 Receiver buffer overflow
The control board is unable to process information from the other units at a sufficiently high
speed. This fault is caused by abnormal loading of the microprocessor.
Action: Turn off the mains power supply to reset the unit.
26 Program operating fault
Something has prevented the processor from performing its normal program duties. The
program restarts automatically. The current welding process will be stopped. This fault does
not disable any functions.
This fault should never occur in reality. Contact ESAB if the fault does occur.
28 Stack overflow
The stack memory is full.
This fault should never occur in reality: the fault code is intended as an aid during
development work. Contact ESAB if the fault does occur.
29 No cooling water flow
The flow monitor switch has operated. The current welding process will be stopped, and
cannot be restarted.
Action: Check the cooling water circuit and pump.
Water flow monitoring is an option.
32 No gas pressure / flow
Action: Check the gas valve, hoses and connectors.
Gas monitoring is fitted only to special versions of the power sources.
cu20f1
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S0740 800 191/E080229/P78