Installation And Wiring/Connection Issue - Delta VFD-VJ Series User Manual

7. Recommended Operations for Customers and Troubleshooting

7-6 Installation and Wiring/Connection Issue

Notices for wiring: Most of such kind of faults usually occur when the customers perform improper
wiring.
Impact on the product:
(1) The screws for the wiring are not securely fastened so that the contact resistance is too high,
resulting in arcing damage to the inverter.
(2) If the customer arbitrarily modifies the internal circuit of the inverter, it may cause damage to the
related parts.
Recommended measure: While installing the inverter, it is necessary to have all the screws fastened
securely. If the machine has malfunction, please do not attempt to repair. Please return the product to
the dedicated service center for repair!
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