Hypertherm Powermax105 Service Manual - Manual (Page 174)

TroubleshooTing and sysTem TesTs
8-36
powermax
105 Service Manual
Problem Meaning Causes Solution
The ON/OFF power
switch is set to ON (I),
but the power ON LED is
not illuminated.
There is insufficient
voltage to the
control circuits or
a short-circuited
power component.
No voltage,
improper voltage
applied to the unit,
a faulty power
switch (S1), or a
faulty input diode.
• Check to see that the system is plugged
into an appropriately-sized circuit and
that the circuit breaker has not been
tripped.
• Verify that the power is ON at the main
power panel or at the line-disconnect
switch box.
• Verify that the line voltage is not too
low (more than 15% below the rated
voltage).
• Perform Test 1 to check the incoming
voltage and the power switch.
• Perform Test 12 on CSA units.
Faulty power
board, fan, or
solenoid valve.
• Perform Test 5 to check the flyback
circuit.
Faulty power board
or IGBT.
• Perform Tests 1, 2, and 3 and replace
any faulty components.
Faulty control
board.
• Replace the control board.
Faulty DSP board. • Replace the DSP board.
troubleshooting guide
Note: Fault icons and corresponding fault codes appear in the user display for many errors. If a fault code appears,
refer to page 8-23 Fault codes before using this troubleshooting guide.
The following table provides an overview of the most common problems that can arise when using the Powermax and
explains how to solve them. See page 8-42 System tests for detailed test procedures.