Firepower FP 125 Operating Manual & Installation Manual page 41

FAULT
6 Weld cracking
7 Cold weld puddle
8
Arc does not have a crisp
sound that short arc
exhibits when the wirefeed
speed and voltage are
adjusted correctly.
9 Thermal overtemperature
light illuminatesduring
welding, but fan motor
continues to run.
10 Thermal overtemperature
light illuminates in less
than 30 seconds during
welding
Manual 0-5123
CAUSE
A Weld beads too small
B Weld penetration narrow
and deep
C Excessive weld stresses
D Excessive voltage
E Cooling rate too fast
A Faulty rectifier unit
B Loose welding cable con-
nection.
C Low Primary Voltage
The MIG torch has been
connected to the wrong
voltage polarity on the
front panel.
The machine duty cycle
has been exceeded.
Fan has stopped running
or fuse on PCB has blown.
5-3
ESAB FIREPOWER FP-125,135,165
REMEDY
A Decrease travel speed
B Reduce current and voltage and increase MIG torch
travel speed or select a lower penetration shielding
gas.
C Increase weld metal strength or revise design
D Decrease voltage by reducing the voltage selection
switch.
E Slow the cooling rate by preheating part to be
welded or cool slowly.
A Have an Accredited ESAB Service Agent to test then
replace the faulty component.
B Check all welding cable connections.
C Contact supply authority
Connect the MIG torch to the positive (+) welding
terminal for solid wires and gas shielded flux cored
wires. Refer to the electrode wire manufacturer for
the correct polarity.
Allow the fan to run, to allow the machine to cool
down.
Have an accredited ESAB Service Agent replace the
fan motor or fuse.
SERVICE