Service manual

S0740 800 179/E071123/P64
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ct33f1
Code Description, AC unit
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 remote control unit is connected. See
also section 20AP1:3 ’The CAN bus’ on pages 29 to 30.
13 High temperature external
The temperature monitoring circuit has operated. The power source is stopped, and cannot
be restarted until the circuit has reset.
Fault code 13 does not normally occur at standard equipment. The sensing input is bridged
by a resistor on circuit board 18AP2, see page 22.
22 Transmitter buffer overflow
The 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 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.
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.