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Fault Diagnostics / Maintenance
Pneumatics
Providing there is a good filtered regulated and lubricated air supply, using good quality airline oil, mainte-
nance will be minimal. However, a thorough inspection of the machine is neces¬sary from time to time. Any
mechanical damage of pipes and fittings should be dealt with before re using the machine.
Always lock air supply OFF and bleed out system air before attempting any maintenance of air sys-
tem.
Other problems that cylinders and solenoid valves may suffer from are:
• Lack of electrical supply signal - Check appropriate circuitry.
• Solenoid has become open circuit - Replace with new solenoid.
• Return mechanism jammed or broken - Dismantle valve to investigate. Replace if required.
• Wet or dirty air supply - Check condition of air compressor and condensate management system.
• Internal leaks within valves & cylinder – Repair with new seals or replace.
Please specify cylinder/ valve number & model when ordering any pneumatic spare parts.
Many problems can be caused by water in the pneumatic system.
Vacuum system (continuation)
The possible causes of poor vacuum are:
• The mould baseboard is restricting the vacuum hole in the table.
• NOTE: If the mould baseboard is too soft it may pull down under vacuum and block the vacuum hole.
• The mould is inadequately vented to allow trapped air to be evacuated.
• The table and clamp seals are in poor condition or the table is not locking properly at the top of its travel.
• There are holes drilled in the table.
If all the above points are OK and you can hear the pump running when you switch it on then one of the
following points will be the cause of the problem. If the pump does not run, refer to the Electrical trouble
shooting section above.
• A pipe is loose, damaged or blocked.
• The pump filter is blocked.
• The vacuum valve is blocked.
• The vacuum pump is blocked or corroded.
If the heater has been left in the forward position, with no plastic in the clamp frame, the table will start to
overheat. The pipe attached to the back of the table will shrink and constrict the passage of air. Pipes beco-
me less flexible over time and may loosen or crack.
The Vacuum filter box is mounted on the rear of the machine. Simply unlatch the spring clips and remove
the filter. Light dust may be cleaned off by blowing the filter with compressed air. Replacement would be
required if the filter is damaged or degraded in any way.
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