Hypertherm HyPrecision 100D, Instruction Manual

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Shutdown I Messages
Shutdown I fault conditions are severe enough to require the intensifier to shut down but will allow the
motor to keep running. The red light will be flashing and one of the following images will be displayed
on the LCD screen.
•
INLET WATER PRESSURE BELOW 40 PSI (2.8 BAR)
•
HYDRAULIC OIL TEMP > 150ºF (65ºC)
•
INTENSIFIER OVERSTROKE
Inlet Water Pressure Below 40 psi (2.8 bar)
The most likely cause is a failure of the water supply to the pump. A pressure switch senses the water
pressure after the filters. If the water pressure falls below the set point, the monitoring circuit will open
and this fault will occur. Make sure that the plant supply water is turned on. Verify that any manual or
electrical inlet valves are open and functioning properly.
Some pumps are equipped with an inlet-water solenoid valve. If the cutting water solenoid does not
open when the motor is turned on, a fuse could be blown. Refer to the schematic to determine which
fuse is protecting the PLC output for the inlet water solenoid. The fuses have holders that light up when
the fuse is blown to make it easy to identify. Determine the cause of the blown fuse before replacing it.
If the fuse was blown because of a damaged solenoid valve, replace the valve. Clogged water filters can
also cause low inlet water pressure.
Read the Low-Pressure Water section of the manual to identify other possible causes. Once the
problem is corrected, press the RESET button on the alarm screen and resume normal operation of the
pump.
Hydraulic Oil Temp > 150ºF (65ºC)
If the temperature of the oil in the tank exceeds 150ºF (65ºC), the red light will begin to flash and the
intensifier will shut down warning the operator of a potential cooling water problem. Refer to the
previous paragraph for information about potential causes. After correcting the problem, press the
(F1) button on the OCS to turn off the warning light and reset the alarm. If the alarm persists longer
than a preset amount of time, the pump will shutdown completely.
Intensifier Overstroke
The Intensifier Overstroke fault is caused when the hydraulic piston travels one or both ways too
quickly. If the intensifier strokes too many times in one direction, other than during startup and when
switching from low to high pressure, and each stroke is less than the set threshold, the overstroke fault
will be triggered. The message will have an indicator to the direction the piston is traveling when the
fault occurs. The arrows can be very helpful in determining which side may be the cause of the problem.
Refer to the
Intensifier Cycling subsection of the High-Pressure Water section of the manual. After
identifying the cause and taking corrective action, press the RESET button on the alarm screen and
resume normal operation of the pump.
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