Hafco Metalmaster S829, Instruction & Parts Manual, Page: 12 / 31

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8.5 Troubleshooting the inverter
Troubleshooting the inverter
Prior to operating all electronic parts, the following aspects should be taken into consideration first
Note: Only eligible and qualified personnel can make electronic adjustments.
1.
Disconnect machine from power supply.
2.
Electronic parts are extremely sensitive, do not use hands or metal tools to remove or install such
parts.
3.
As remaining voltage still exists in the capacitor even after the electric current has been cut off,
wait until the light disappears from the lighted display completely before proceeding with any work
to prevent any accidents or hazards from occurring.
4.
Pay close attention to the electronic circuit board so that they are free from any defects.
5.
Never connect the alternating current directly to the output connector (U/V/W) of the speed
adjuster. The electronic self-diagnosis program can notify you of situations like motor overloading
and too low or too high voltage, etc. When the program detects an error, the machine will stop
immediately and such error will be displayed on the inverter’s digital display. Follow the solutions
to correct any errors. Close the electrical cabinet and connect machine to power supply.
6.
Wait 5 seconds after a fault has been cleared before performing reset via keypad of input
terminal.
8.6 Common Problems and Solutions