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15
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1. Daily Precautionary Checks
1.1. For any abnormal vibrations, sounds or odours.
1.2. For any sign of overheating on cable connections.
1.3. Whether the power switch is operational and the fan operates smoothly when
the machine is switched on.
1.4. Whether cables are correctly connected, insulated and in sound order.
1.5. Torch consumables are subject to wear and tear and should be replaced when
worn..
2. Three to Six Monthly Check List
2.1. Dust Removal
Remove the side cover plate and clean off all parts with dry compressed air. Since
the effective cooling of the machine is dependent on a designed air flow pattern, it is
important to return the side cover plate after the cleaning operation. Not paying
attention to this detail, will result in over-heating of and consequent damage to the
transformer and semi-conductor parts.
Common Machine Malfunctions and Solutions
Warning
：
Machine maintenance and repair must be carried out by qualified
technicians. The operating voltage in the machine can be up to 600V and it is
important that power be cut at the machine and at the control box before
covers are removed and repairs carried out. A cooling-down period of at least
5 minutes is required before commencement of any inspection and repairs.
This will allow the capacitor to fully discharge.
1. Inspection Before Overhaul
1.1. Check if the line voltage on the three
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phase power supply is within the range of
340V
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420V and, that all phases on a three
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phase system are intact.
1.2. Check if the power cable as well as the earth wire is firmly connected.
1.3. Check whether the wiring connections are correct and firmly connected.