BPD series PV pumping inverter Fault diagnosis and solution
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4 Fault diagnosis and solution
Do as follows after the inverter encounters a fault:
1. First, check whether there is something wrong with the keypad. If yes, contact the
local INVT office.
2. If there is nothing wrong, check function codes of P07 Group, view the
corresponding recorded fault parameters, and identify the actual state when the
current fault occurs based on all the parameters.
3. See the following table, check for exceptions based on the specific solutions.
4. Rectify the fault or seek help.
5. After ensuring that the fault has been rectified, perform fault reset and start the
inverter.
Overvoltage when
acceleration
1. The input voltage is
abnormal.
2. There is large energy
feedback.
3. No brake 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 inverter
starts during the rotation of the
motor or it needs to increase the
energy consumption
components.
3. Install the brake components.
4. Check the setting of related
function codes.
Overvoltage when
deceleration
Overvoltage when
constant speed
running
Overcurrent when
acceleration
1. The acceleration or
deceleration is too fast.
2. The voltage of the grid is
too low.
3. The power of the inverter 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 inverter 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 related
function codes.
Overcurrent when
deceleration
Overcurrent when
constant speed
running
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