Appendix D Suggestions And Error Corrections For Standard Ac Motor Drives - Delta VFD-VL Series User Manual

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Appendix D Suggestions and Error Corrections for
The AC motor drive has a comprehensive fault diagnostic system that includes several different
alarms and fault messages. Once a fault is detected, the corresponding protective functions will be
activated. The following faults are displayed as shown on the AC motor drive digital keypad display.
The six most recent faults can be read from the digital keypad or communication.
The AC motor drive is made up by numerous components, such as electronic components,
including IC, resistor, capacity, transistor, and cooling fan, relay, etc. These components can't be
used permanently. They have limited-life even under normal operation. Preventive maintenance is
required to operate this AC motor drive in its optimal condition, and to ensure a long life.
Basic check-up items to detect if there were any abnormalities during operation are:
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Wait 5 seconds after a fault has been cleared before performing reset
via keypad of input terminal.
When the power is off after 5 minutes for
minutes for 30kW models, please confirm that the capacitors have
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fully discharged by measuring the voltage between + and -. The
voltage between + and - should be less than 25VDC.
Only qualified personnel can install, wire and maintain drives. Please
take off any metal objects, such as watches and rings, before
operation. And only insulated tools are allowed.
Never reassemble internal components or wiring.
Make sure that installation environment comply with regulations
without abnormal noise, vibration and smell.
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Standard AC Motor Drives
22kW models and 10
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