Operating Instructions DC-xx13 and M31xx
961-00060 rev9 23/25
7 Trouble Shooting Guide
The following section has been prepared as a basic checklist to use in the event of the system
problem. The design and reliability of the products is such that power supply failure itself is extremely
rare.
More often than not, a system problem will be caused by a change in the overall process in which the
power supply is used. It is therefore VERY IMPORTANT to consider the variables that may effect the
welding process and to be sure that these are under control, before suspecting a problem with the
power supply.
Typical process changes maybe
1. An electrode change; dirty or damaged electrodes
2. Dimensional changes in product
3. Material quality, e.g. Oxide layer, substrate thickness etc..
4. Faulty weld heads
If these aspects have been considered, then the following checklist should be worked through. Most
machines provide a level of fault reporting with error codes and rudimentary help. Before making chan
Is the power on indicator
illuminated ?
This LED illuminates to show the
machine is ON and that the internal
+24VDC supply is functioning
Check rear panel fuse (if fitted).
Disconnect ALL external
connections.
(It is quite common for external
wiring faults to cause the
+24VDC supply to be
overloaded)
Check mains fuse
Check mains supply to machine
Is the main display
illuminated?
The machine display will illuminate
ONLY if the +15V internal supply is
good
Check rear panel fuses
Check mains supply to machine
Check mains fuse
Machine is on, but no output The machine output will be inhibited
if the machine overheats or suffers a
feedback fault.
Clear the fault & inhibit
Allow machine to cool down and
investigate reasons for over
heating
Check output connections.
Machine is on, but no output
(using distribution electronics)
Loss of output maybe caused by
either the power supply or the
distribution electronics
If using distribution, disconnect
the distribution electronics and
connect a load across the
welder directly. Try a sample
weld pulse.
Machine continually produces
a HARDWARE/FEEDBACK
fault
This occurs when the machine loses
the measurement feedback used for
control - The most common problem
is broken voltage feedback wires.
Similar faults also occur when
electrodes have been replaced or
modified incorrectly.
A quick check for voltage
sensing feedback is to try a
weld with internal sensing by
disconnecting the leads and
fitting links or by unplugging the
voltage sensing jack socket.
Check electrode contact
Machine continually produces
a HARDWARE/FEEDBACK
fault
(using distribution electronics)
The fault must be traced to either the
power supply or the distribution
electronics.
If using distribution, disconnect
the distribution electronics and
connect a load across the
welder directly. Try a sample
weld pulse.
To Next Page
Loading...
