Troubleshooting for Common Problems
Powermax65/85/105 SYNC Troubleshooting Guide 810430 65
The ON / OFF
power switch is
set to ON (I), but
the power ON
LED ( ) is off.
Voltage to the
control circuits is not
sufficient, or a power
component has a
short circuit.
• Voltage to the system is
missing.
• Voltage to the system is
incorrect.
• The power switch is
defective.
• An input diode is
defective.
• Make sure that the power cord is
connected correctly to the power
outlet or line-disconnect switch box.
• Make sure that the power is on at the
main power panel or at the
line-disconnect switch box.
• Make sure that the circuit breaker
did not open (trip).
• Make sure that the line voltage is not
too low (more than 15% below the
rated voltage). Refer to the electrical
specifications in the
Powermax65/85/105 SYNC
Operator Manual (810470).
•Do Test 1 – Voltage input on
page 78 to do a check of the
incoming voltage and the power
switch.
•Do Test 12 – Auxiliary (AUX) switch
on page 123. This test is not
applicable for
Powermax65/85 SYNC CE/CCC
models.
• The fan is defective.
• The solenoid valve is
defective.
•The power PCB is
defective.
•Do Test 5 – Flyback circuit (DC
minor voltages) on page 94.
• An IGBT is defective.
•The power PCB is
defective.
•Do Test 1 – Voltage input on
page 78.
•Do Test 2 – DC power bus on
page 83.
•Do Test 3 – Output diodes on
page 90.
• The control PCB is
defective.
• Replace the control PCB.
•The DSP PCB is
defective.
• Replace the DSP PCB.
The power ON
LED ( ) is on.
No fault codes
show on the main
screen, but no
gas flows when
you fire the torch.
The start signal is not
getting to the control
PCB.
• There can be damage to
the torch or to the torch
lead.
• The control PCB can be
defective.
• The power PCB can be
defective.
• Examine the torch and the torch lead
for damage.
• If the start icon ( ) does not show
on the main screen when the torch is
fired, do Test 7 – Start signal on
page 102.
Problem Meaning Causes Solutions
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