Longevity ForceCut LP-100, Operating Manual, Page: 20 / 21

ForceCut™ Series Plasma Cutters
www.longevity-inc.com
18
Troubleshooting
Most problems confronted by machine users are the result of rough handling by the
shipping company. Regardless of the source of your problem, the most common
problems are listed in the following table, and can be resolved by you, the customer.
If you can’t find the cause of your problem in the following table, call or email us.
Problems and Causes
Problems
Causes for
ForceCut™ LP-
40/50/60 Series
Causes for ForceCut™
LP-60D/LP70/LP-100/
Power switch is ON.
Fan and machine do
not operate.

Machine temporarily turned
off by over voltage
protection

Incorrectly connected
power cord
 Damaged assistant
transformer on control
board

Incorrectly connected
power cord

Loose connector wires
Power switch is ON,
Fan operates. Pushing
cut button on torch
allows air to pass, but
arc does not start.
Error LED illuminates
 Damaged K1170 on top
PCB

Damaged step-up
transformer
 Damaged control board

Loose connector wires
 Damaged rectifier diode

Damaged 1KV/102 high
frequency capacitor

Damaged K1170 on top
PCB
 Damaged step-up
transformer

Damaged control module
Power switch is ON,
Fan operates. Pushing
cut button on torch
allows air to pass, but
arc does not start.
Error LED does not
illuminate
 Improperly installed torch
consumables. Tighten
consumables more
 Primary coil of arc-leading
transformer is shorted or
incorrectly connected
 Damaged rectifier diode
 Leaking HF capacitor

Relay is damaged
 Improperly installed torch
consumables. Tighten
consumables more.
 Primary coil of arc-leading
transformer is shorted or
incorrectly connected.
 Damaged rectifier diode
 Leaking HF capacitor

Relay is damaged
Arc does not start
when torch button is
pushed.
 Low input voltage

Air compressor pressure too
low or too high
 Low input voltage

Air compressor pressure too
low or too high