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18
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2. Common Machine Problems and Troubleshooting
No.
Problem
Root cause
What to do
1
The "machine
-
on"
light not lit. No
digital display. Fan
not operational. No
no
-
load output.
Power switch turned off or
damaged.
Repair or replace the
power switch.
Power supply phase
missing.
Check power input for
phase loss.
No power in the grid.
Check grid voltage.
Damaged filter capacitor
or bridge rectifier resulting
in start failure.
Replace filter capacitor
and bridge rectifier.
Power frequency
transformer damaged.
Replace power
frequency transformer.
Damaged control board.
Replace control board.
2
No digital display or
the ''machine
-
on''
light not lit. Fan
operational. Error
indicator light not
active. No load
output
Digital display meter or
indicator light damaged.
Replace meter or
indicator light.
Loose wire connection.
Check and tighten or
reconnect the wire.
Control board damaged.
Check problem on
control board or replace
board.
3
The ''machine
-
on''
light is lit. Digital
display meter
functional and fan
operational. Error
indicator light is off.
No high
-
frequency
discharge sound
when torch trigger is
pressed. No no
-
load
output.
Insufficient torch
-
trigger
contact and the
torch
-
trigger connecting
wire is loose.
Re
-
connect the torch
trigger and fasten the
torch
-
trigger connecting
wire.
Control wire on the cutting
torch broken or torch
trigger damaged.
Replace torch trigger.
Problems with control
circuit.
Check control circuit.
