• Make sure that the coolant level is slightly more than the level switch.
• Examine the hoses and hose fittings. Look for damage or loose connections.
4. If you cannot find or correct the problem, speak to your cutting machine supplier or regional
Hypertherm Technical Service team.
Troubleshooting for low current
Diagnostic codes 550, 552 – 554
Diagnostic codes 550 and 552 – 554 identify a problem with a reduction in current in the plasma power
supply.
Symptoms
Code Symptoms XPR models XPR action Code cancels with...
550 For a minimum of 10 milliseconds during a Steady
state, the total current decreases to less than 50%
of the current setpoint, and the setpoint is more than
the setpoint for that process (setpoints can be dif-
ferent for different process types).
All models End of cycle • Start process
• Set process
• Remote on-off
552 The Chopper 1 current decreases to less than 50%
of the setpoint for 50 milliseconds, and the setpoint
is more than 10 A.
All models
553 The Chopper 2 current decreases to less than 50%
of the setpoint for 50 milliseconds, and the setpoint
is more than 10 A.
XPR300,
XPR460
554 The Chopper 3 current decreases to less than 50%
of the setpoint for 50 milliseconds, and the setpoint
is more than 10 A.
XPR460
End of cycle • Set process
• Remote on-off
Corrective action
1. Examine the consumables, and replace consumables that have damage or excessive wear.
2. Do a test for gas leaks, and replace the leaking components if found.
3. Examine the J6 connector on the control PCB for loose connections, and tighten them if found.
4. Examine the contactors, and replace contactors that have damage.
5. Look for DC bus errors.
Diagnostics and Troubleshooting
8
329811530Instruction ManualXPR460
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