Hypertherm Powermax30 AIR Service Manual - Manual (Page 65)

Powermax30 AIR Service Manual 808850 65
5 – Troubleshooting and System Tests
Temperature LED faults
The temperature LED illuminates while the machine is powered ON.
Possible causes Possible solutions
 The system overheated because the duty
cycle was exceeded.
 The system is too cold to operate. The
ambient temperature is too low.
 Let the system cool before using it. Leave
the system on to allow the fan to cool the
power supply. The fan runs for 7 minutes
after postflow. See
Understand duty-cycle
limitations on page 48.
 Perform Test 8 – fan on page 90.
 Let the system warm up before using it. The
operating temperature range for this system
is -10°C (14°F) to 40°C (104°F).
The temperature LED blinks while the machine is powered ON.
Possible causes Possible solutions
This fault occurs when the system continuously
draws too much input current for too long. The fault
protects the power switch and power cord from
damage caused by overheating. This fault most often
occurs when:
 You are operating the system on a 120 VAC
input circuit and the cutting current is set
above 20 A.
 You are operating the system on a
120 V / 15 A circuit.
 You are operating the system on a 120 VAC
input circuit and are frequently stretching the
arc while cutting.
 You are using an extension cord that is too
long.
The maximum length for an extension
cord on a 120 VAC input circuit is 16 m
(53 feet). The maximum length for an
extension cord on a 240 VAC input
circuit is 40.5 m (133 feet).
Let the system cool for 3 minutes before using it.
Leave the system on to allow the fan to cool the
power supply.
To prevent the fault from occurring:
 Operate the system on a 240 VAC input
circuit whenever possible.
 Turn down the cutting current. See
Step 3 – Adjust the output current on
page 45.
 If you do operate the system on a120 VAC
input circuit, use a 20 A circuit and set the
cutting current below 20 A.
 Avoid stretching the arc. Drag the torch on
the workpiece. See
Edge start on a
workpiece on page 52.
 Operate the system without using an
extension cord. If you must use an extension
cord, use a heavy conductor cord of the
shortest possible length. See
Extension
cord recommendations on page 31.