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17
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2. Three to Six Monthly Check List
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
technical individuals.
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 single
-
phase power supply is within the range of
200V – 240V. For three
-
phase, check if the line voltage is within the range of
360V
-
440V and, that all phases on a three
-
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.
