EX-TRAFIRE
®
55SD
Operator Manual, Revision T-3 7-43
SECTION 7�
TROUBLESHOOTING
SECTION 7: TROUBLESHOOTING
Fault This may mean Cause Solution
Main switch
is ON and the
AC power
LED1 fails to
illuminate�
• No / low voltage
of mains power
source�
• Insufficient mains
power source�
• Check the mains input
voltage 3 x 400 VAC ± 15%
(3 x 220 VAC ± 15%)�
• Check internal control board
supply�
• The mains power
lead is not plugged
in to a live socket�
• Plug the mains power lead in
to a live socket�
• Main power switch
is defective�
• Replace the main power
switch�
Note: The fan turns ON and OFF automatically� The fan may not run when
the plasma arc power supply is switched on�
The LED2
illuminates�
• Over-
temperature (OT)
• Fan fault� • Ensure fan is free running,
correct condition�
• Duty cycle over
limit�
• Allow the power supply to
cool down and reset� Do not
exceed the rated duty cycle�
• Over-current
(OC)
• Some of power
supply inside
component is over
lifetime or burned
out�
• Contact your distributor�
The LED3
illuminates�
• Gas pressure
fault�
• The gas input
pressure is lower
than 2�4 bar/34�9
psi�
• Check gas supply input
pressure�
• Damaged torch
lead�
• Replace the torch lead�
• Pressure switch
fault�
• Incorrect pressure� • Change the pressure switch
inside the power supply�
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