TD20 Series VFD Fault Tracking
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6.2.2 How to reset
The VFD can be reset by pressing the keypad key STOP/RST, through digital input, or by switching the
power light. When the fault has been removed, the motor can be restarted.
6.2.3 Fault instruction and solution
Do as the following after the VFD fault:
1. Check to ensure there is nothing wrong with the keypad. If not, please contact with the local
TECHTOP CANADA INC. office.
2. If there is nothing wrong, please check P07 and ensure the corresponding recorded fault parameters
to confirm the real state when the current fault occurs by all parameters.
3. See the following table for detailed solution and check the corresponding abnormal state.
4. Eliminate the fault and ask for relative help.
5. Check to eliminate the fault and carry out fault reset to run the VFD.
Over-current when
acceleration
1. The acceleration or
deceleration is too fast.
2. The voltage of the grid is
too low.
3. The power of the VFD is too
low.
4. The load transients or is
abnormal.
5. The grounding is short
circuited or the output is
phase loss.
6. There is strong external
interference.
7. The overvoltage stall
protection is not open.
1. Increase the ACC time
2. Check the input power
3. Select the VFD with a larger
power
4. Check if the load is short
circuited (the grounding short
circuited or the wire short
circuited) or the rotation is not
smooth.
5. Check the output
configuration.
6. Check if there is strong
interference.
7. Check the setting of relative
function codes.
Over-current when
deceleration
Over-current when
constant speed
running
Over-voltage when
acceleration
1. The input voltage is
abnormal.
2. There is large energy
feedback.
3. No braking components.
4. Braking energy is not open
1. Check the input power
2. Check if the DEC time of the
load is too short or the VFD
starts during the rotation of the
motor or it needs to increase
the energy consumption
Over-voltage when
deceleration
Over-voltage when
constant speed
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