Operation Manual P750/P1500/P3000
Cold Jet, LLC Page 24
Preventative Maintenance
Weekly Checklist
• Check hydraulic oil level at the oil temp and level gauge.
• Check for leaking and worn hoses.
• Check for oil leaks.
• Check gauges on control panel.
• Check for proper operation of the chamber pressure gauge.
• Check lights on the control panel by pushing the reset button.
• Run machine and check for CO
2
leaks.
• While making ice make sure the piston advance time is 12 sec.
• Check the ice quality to make sure it does not easily crumble.
• Check if the cooling fan turns on when the oil temperature reaches 100°F (38°C).
Incidental Malfunctions
General Malfunctions
Chamber Pressure
If the Chamber Pressure is below 30 psig (2.1 bar):
• Turn the flow control valve 1/8-turn counter clockwise, each injection cycle, until the
chamber pressure reads a maximum of 30 psig (2.1 bar).
• The liquid supply line or the filter is plugged with CO
2
snow. This can result from an
improper start up procedure.
If the Chamber Pressure does not drop to zero at the end of an injection cycle:
• The ball valve is not providing a positive valve shutoff at the end of the cycle.
• The actuator may not be closing the ball valve completely or the ball valve may be
faulty.
• If the flow control valve is open too far, it will cause high and/or erratic chamber
pressure indications.
Liquid CO
2
Injection Pressure
If the pressure drop exceeds 20 psig (1.4 bar) during injection:
• The liquid filter is clogged.
• There is CO
2
snow somewhere in the liquid CO
2
lines.
Liquid CO
2
Supply Pressure
If the liquid CO
2
gauge indicates pressure and the liquid injection pressure is very low, while
the liquid valve is open and the machine is not running, a CO
2
snow plug may exist in the
internal plumbing of the pelletizer.
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