Hypertherm HPR260 Manual Gas Preventive Maintenance Program Rev.5 - Manual (Page 196)

MAINTENANCE
5-52 HPR260 Auto Gas Instruction Manual
Preventive maintenance
Introduction
Deteriorating consumable parts life is one of the first indications that something is wrong with a plasma system.
Reduced parts life increases operating costs in 2 ways: the operator must use more electrodes and nozzles to cut the
same amount of metal, and the work of cutting must stop more often to change consumables.
Proper maintenance often eliminates the problems that shorten the life of consumable parts. Since labor and overhead
can account for 80% of the cost of cutting, improved productivity can reduce cutting costs dramatically.
Preventive maintenance protocol
The following protocol covers the basic elements of all Hypertherm HyPerformance plasma systems.
If inspection suggests that a component is worn and might require replacement, and you would like confirmation of your
decision, please contact Hypertherm's Technical Service department.
The power supply
DANGER
ELECTRIC SHOCK CAN KILL
Turn off all electrical power before removing the power supply cover and set the
line disconnect switch to OFF. In the U.S., use a “lock-out and tag-out” procedure
until the service or maintenance is complete. In other countries, follow appropriate
local or national safety procedures.
1. With power to the power supply turned off, remove all side panels. Use compressed air to blow out any accumulation
of dust and particulates.
2. Inspect wiring harnesses and connections for wear, damage or loose connections. If you see any discoloration that
might indicate overheating, contact Hypertherm Technical Service.
3. Inspect the main contactor for excessive pitting on the contacts, characterized by a blackened, rough surface on any
of the contacts. If this condition exists, replacement is recommended.
4. Inspect the pilot arc relay (CR1) for excessive pitting on the contacts, characterized by a roughened, black surface.
Replace if necessary.