ESAB Origo Mig L3000i Service Manual page 73

7 FAULT CODES
Code Description
3 Error in external RAM
Read/write test of the processor's internal external RAM. This test is preformed only
as part of 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 power source. If the fault persists, replace circuit board 20AP1,
which carries the microprocessor chip.
4 5 V power supply too low
The unregulated power supply voltage (+30 V) 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 20AP1.
5 Intermediate DC voltage outside limits
The DC voltage from the main rectifier, 2BR1, is too high or too low.
Too high a voltage can be due to severe transients on the mains power supply or to a
weak power supply (high inductance of the supply).
The power source is stopped immediately, and cannot be restarted until the voltage
has returned to within the limit values.
Action: Turn off the mains power supply to reset the unit. See also "15AP1:3
Overvoltage and undervoltage protection", page 36.
6 High temperature
The temperature monitoring circuit has operated. The power source is stopped, and
cannot be restarted until the circuit has reset. See also "15AP1:2 Temperature
monitoring", page 35, "15AP2:2 Temperature monitoring", page 42 and
"20AP1:4 Temperature monitoring", page 60.
Possible causes: Overloading, fan not working properly, cooling air inlets or outlets
blocked or obstructed or dirt on the heat exchanger.
8 +15 V power supply on circuit board 20AP1
The voltage is too high or too low: it must be within the range 14.1 to 15.9 V. This
fault does not disable any functions.
9 -15 V power supply on circuit board 20AP1
The voltage is too high or too low: it must be within the range -14.2 to -16.4 V. This
fault does not disable any functions.
10 +24 V power supply on circuit board 20AP1
The voltage is too high or too low: it must be within the range 22.1 to 26.0 V.
12 Communication error (warning)
The load on the system CAN bus is temporarily too high, or there is electric noise on
the bus.
Action: Check the equipment to ensure that only one wire feed unit and/or remote
control unit are connected. See also "20AP1:3 The CAN bus", page 57.
15 Lost messages
The bus CAN controller indicates that a message has been lost. No functions are
disabled by this fault.
Action: Check that all units are correct connected to the CAN bus. See also
"20AP1:3 The CAN bus", page 57.
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