Hypertherm powermax900, Service Manual

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3-9
M
AINTENANCE
Service Manual
WARNING
SHOCK HAZARD: Do not attempt repairs on the power board or control
board. Do not in any way cut away or remove the protective conformal
coating from either board. To do so will risk a short between the AC input
circuit to the output circuit and may cause serious injury or death.
The power supply and PC boards are subjected to dielectric and insula-
tion resistance tests per applicable CSA and IEC standards for the safety
of the operator and service technicians.
Removal of the protective conformal coatings and other unauthorized
repairs to the PC boards will void the warranty.
If questions or problems arise during servicing, call the Hypertherm Tech-
nical Services department at 1-800-643-9878.
WARNING
SHOCK HAZARD: Always turn off power and unplug cord from wall and
wait 5 minutes before removing any cover of the power supply. If power
supply is directly connected to a line disconnect box, place line discon-
nect switch to OFF position. In the U.S., use a "lock-out / tag-out" proce-
dure until the service or maintenance work is complete. In other coun-
tries, follow appropriate national or local safety procedures.
If power is required for servicing, be aware that dangerous voltages exist
within the power supply which could cause serious injury or death. If
questions or problems arise during servicing, call the Hypertherm Techni-
cal Services department at 1-800-643-9878.
Visual Inspection - Internal