ESAB Aristo Mig 3001i Service Manual page 42

Code Description, power source
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 section 15AP1:3 on page 20.
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 pages 19, 24 and 30.
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 - 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 of -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 of 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 is connected. See also section 20AP1:3 'The CAN bus' on pages 28 to 30.
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 correctly connected to the CAN bus. See also section
20AP1:3 'The CAN bus' on pages 28 to 30.
16 High open-circuit voltage (VRD)
The open-circuit voltage has been too high.
Action: Turn off the mains power supply to reset the unit. If the fault persists, check the arc
voltage feedback: see page 32.
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