Firepower FP-125 Operating Manual page 48

FIREpOwER Fp-125, 135, 165
FAULT
6 Weld cracking
7 Cold weld puddle
8
Arc does not have a crisp
sound that short arc ex-
hibits when the wirefeed
speed and voltage are ad-
justed 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 A Decrease travel speed
B Weld penetration nar-
row and deep
C Excessive weld stress-
es
D Excessive voltage
E Cooling rate too fast
A Faulty rectifier unit
B Loose welding cable
connection.
C Low Primary Voltage C Contact supply authority
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 run-
ning or fuse on PCB has
blown.
5-4
REMEDY
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 de-
sign
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 THERMAL ARC Service
Agent to test then replace the faulty compo-
nent.
B Check all welding cable connections.
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 THERMAL ARC Service Agent
replace the fan motor or fuse.
SERVICE
Service