Hypertherm Powermax30 AIR Service Manual - Manual (Page 57)

Powermax30 AIR Service Manual 808850 57
5 – Troubleshooting and System Tests
Troubleshooting preparation
The complexity of the circuits requires that service technicians have a working knowledge of inverter power supply theory.
In addition to being technically qualified, technicians must perform all testing with safety in mind.
If questions or problems arise during servicing, call the Hypertherm Technical Services team listed in the front of this
manual.
WARNING!
ELECTRIC SHOCK CAN KILL
Turn OFF (O) the power and disconnect the electrical power before removing the cover
from the power supply. If the power supply is connected directly to a line disconnect box,
switch the line disconnect to OFF (O). In the U.S., use a “lock-out / tag-out” procedure
until the service or maintenance work is complete. In other countries, follow appropriate
national or local safety procedures.
Do not touch live electrical parts! Do not touch the tip of the nozzle when the system is
powered ON (I)! If power is required for servicing, use extreme caution when working near
live electrical circuits. Dangerous voltages exist inside the power supply that can cause
serious injury or death.
Do not attempt to repair the power board, control board, or compressor-driver board. Do
not cut away or remove any protective conformal coating from these boards. To do so
risks a short circuit between the AC input circuit and the output circuit and may result in
serious injury or death.
HOT PARTS CAN CAUSE SEVERE BURNS
Allow the power supply to cool before servicing.
MOVING BLADES CAN CAUSE INJURY
Keep hands away from moving parts.
STATIC ELECTRICITY CAN DAMAGE CIRCUIT BOARDS
Put on a grounded wrist strap before handling printed circuit boards.