Longevity FORCECUT 42i - Manual (Page 16)

ForceCut 42i 110v/220v PFC 40amp Plasma Cutter
16
Troubleshooting
WARNING
There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose or
repair unless you have had training in power electronics measurement and troubleshooting techniques.
A. The cutting torch fails to ignite the arc, when press on the torch switch, the TIP/GUN/GAS light on.
1. Gas pressure too high, gas test then adjust gas pressure to 4bar/60psi.
B. The cutting torch fails to ignite the arc, when the torch switch is pressed; the TIP/GUN/GAS lamp turns on.
1. The shield cup is improperly installed. Turn off the power source, install the shield cup properly, and then turn on
the power source.
C. The cutting torch fails to ignite the arc, when press on the torch switch, the TIP/GUN/GAS lamp on and air
feed intermittently.
1.The electrode or nozzle improper installation, turn off the power source, install the electrode or nozzle, and screw
shield cup down properly, then turn on the power source.
D .The cutting torch fail to ignite the arc, when press on the torch switch, the TIP/GUN/GAS lamp on and air
feed intermittently.
1. Short-circuit for burned-out and other abnormal situation, turn off the power source, and change the electrode and
nozzle.
E. Power lamp and temperature lamp on.
1. Air flow blocked, check for blocked air flow around the unit and correct condition.
2. Fan blocked, check and correct condition.
3. Unit is overheated, let unit cool down for at least 5 minutes. Make sure the unit has not been operated beyond
Duty Cycle limit, refer to technology parameters in Section 2.
4. Faulty components in unit, return for repair or have qualified technician repair per Service Manual.
F. Torch fails to ignite the arc when torch switch is activated
1. System is in SET mode，change to RUN mode.
2. Faulty torch parts, inspect torch parts and replace if necessary.
3. Gas pressure too high or too low, adjust to proper pressure.
4. Faulty components in unit, return for repair or have qualified technician repair per Service Manual.