Fault Finding - NewArc R1500 Operational Manual

4. Fault finding

Machine operation
Most problems with the operation of the R1500 can be overcome by following the procedures below.
No digital display on switch on
Check that the machine is attached to a working mains supply and that it is correctly plugged in and
any isolator switch is closed. Have a competent electrician check that there are no fuses or overload
devices interrupted, that the mains plug is fitted correctly and that there are no loose wires or
connections, check that there are no breaks in the mains cable.
Power-on indicator lit but no output
Make sure that the overload indicator goes off after 15 seconds. If not see below.
• This indicator must be off for normal operation. If on it indicates that the R1500 has overheated and the
power stages of the R1500 have been shut down so you will get no current output.
In normal climate conditions (40°C and below) the R1500 has a 100% duty cycle so operation of the
thermal cut out indicates that the inside of the machine is likely to be choked with dust and therefore
not being cooled properly.
In Hot climates (above 40°C) it may indicate that you are exceeding the duty cycle of the R1500. Leave
switched on for a few minutes and the R1500 should return to normal operation, do not switch the
R1500 off as this will stop the operation of the cooling fan and greatly extend the cool down period.
Frequent tripping of the thermal cut-out, especially at low current settings is indicative that the inside of
the machine is likely to be choked with dust.
For information about cleaning the dust out of the R1500 please refer to the relevant part of the next
section. Any operating problems not covered above should be referred to a trained Newarc service
engineer or returned to the factory for repair.
14 R1500