Hypertherm Powermax125 Service Manua - Manual (Page 143)

Powermax125 Service Manual 808070 143
8 – Troubleshooting and System Tests
Troubleshooting guide
 Fault icons and corresponding fault codes appear in the user display for many errors. If a
fault code appears, refer to
Fault codes on page 128 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
System tests on page 149 for detailed test procedures.
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 – Voltage input on
page 150 to check the incoming
voltage and the power switch.
• Perform Test 12 – AUX switch on
page 164.
• Faulty power board,
fan, or solenoid valve.
• Perform Test 5 – Flyback circuit (DC
minor voltages) on page 156.
• Faulty power board
or IGBT.
• Perform Test 1 – Voltage input on
page 150, Test 2 – DC power bus on
page 152, and Test 3 – Output
diodes on page 154 and replace any
faulty components.
• Faulty control board. • Replace the control board.
• Faulty DSP board. • Replace the DSP board.
The power ON
LED is illuminated
and no fault codes
are displayed, but
no gas flows
when the torch
trigger is pulled.
The start signal is not
reaching the control board. • The torch or torch
lead may be
damaged.
• The power board
may be faulty.
• The control board
may be faulty.
• Inspect the torch and torch lead for
damage.
• Verify that the start icon appears on
the LCD screen when the trigger is
pulled. If it does not, perform
Test 7 – Start signal on page 160 to
check the start signal from the power
board.