Fault Diagnosis And Solution - HBD PV500-0007M1 User Manual

PV500 series solar pumping inverters

7 Fault diagnosis and solution

Do as follows after the inverter encounters a fault:
1. Check to ensure there is nothing wrong with the keypad. If not, please contact with the local
OUR 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 inverter.
Fault
Fault type
code
IGBT U
OUt1
IGBT V
OUt2
IGBT W
OUt3
Overvoltage when
OV1
acceleration
Overvoltage when
OV2
deceleration
Overvoltage when
constant speed
OV3
running
Overcurrent when
OC1
acceleration
Overcurrent when
OC2
deceleration
Possible cause
1. The acceleration is too fast.
2. This phase IGBT is
damaged internally.
3. Interference causes
misoperation.
4. The drive wire is connected
improperly.
5. The load transients or is
abnormal.
6. The grounding is short
circuited.
1. The input voltage is
abnormal.
2. There is large energy
feedback.
3. No braking components.
4. Braking energy is not open.
1. The acceleration or
deceleration is too fast.
2. The voltage of the grid is
too low.
3. The power of the inverter is
-62-
Fault diagnosis and solution
Solutions
1. Increase the acceleration
time.
2. Change the power unit.
3. Check the drive wire.
4. Check whether the peripheral
equipment has strong
interference sources.
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 braking
components.
4. Check the setting of relative
function codes.
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