TECHTOP TD20 Series Product Manual page 5

TD20 Series VFD
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R, S and T are the input terminals of the power supply, while U, V and W are the motor terminals.
Please connect the input power cables and motor cables with proper techniques; otherwise the
damage to the VFD may occur.
1.3.2 Commissioning and running
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Disconnect all power supplies applied to the VFD before the terminal wiring and
wait for at least the designated time after disconnecting the power supply.
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High voltage is present inside the VFD during running. Do not carry out any
operation except for the keypad setting.
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The VFD may start up by itself when P01.21=1. Do not get close to the VFD and
motor.
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The VFD can not be used as "Emergency-stop device".
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The VFD can not be used to break the motor suddenly. A mechanical braking
device should be provided.
Note:
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Do not switch on or off the input power supply of the VFD frequently.
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For VFDs that have been stored for a long time, check and fix the capacitance and try to run it again
before utilization (see Maintenance and Hardware Fault Diagnose).
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Cover the front board before running, otherwise electric shock may occur.
1.3.3 Maintenance and replacement of components
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Only qualified electricians are allowed to perform the maintenance, inspection, and
components replacement of the VFD.
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Disconnect all power supplies to the VFD before the terminal wiring. Wait for at
least the time designated on the VFD after disconnection.
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Take measures to avoid screws, cables and other conductive matters to fall into
the VFD during maintenance and component replacement.
Note:
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Please select proper torque to tighten screws.
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Keep the VFD, parts and components away from combustible materials during maintenance and
component replacement.
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Do not carry out any isolation and pressure test on the VFD and do not measure the control circuit of
the VFD by megameter.
1.3.4 What to do after scrapping
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There are heavy metals in the VFD. Deal with it as industrial effluent.
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Safety Precautions