24
140AMP Inverter Welder
MMA-140 53528 10/2016
01904 727506
www.coreservice.co.uk
GB
01247 5150
IRE
AFTER SALES SUPPORT
MMA-140 76597 09/2017
Troubleshooting
Troubleshooting
Faults
Remedy
Power indicator is
not lit, fan does not
work and no output
current
1. Check that the unit is plugged into the 240V mains outlet and
is switched on.
2. Check that the mains fuse or breaker has not operated.
3. Check that the main switch on the rear of the unit is in the on
position.
Power indicator is
lit, fan works, no
output current
1. Check if welding cables are connected correctly.
2. Check output connectors not disconnected or damaged.
3. Check that the earth clamp is connected securely to the
workpiece and that the contact point is clean of paint or rust.
Over temperature
indicator is on, no
output current
1. Duty cycle of the unit has been exceeded. Allow the unit to
cool for 20 minutes.
Output current is
not stable
1. Check mains voltage is constant.
2. Check welding cable connectors are tight in the sockets.
3. Check earth clamp connection to the workpiece.
4. Check welding leads are not reversed.
If the machine fails to work after maintenance and checks, please
contact our after sales support centre.
