BPD series PV pumping inverter Fault diagnosis and solution
50
Electronic
underload fault
The inverter will report the
underload pre-alarm
according to the set value.
Check the load and the
underload pre-alarm points.
The hydraulic probe is
damaged.
Replace the hydraulic probe.
PV reverse
connection fault
The PV wiring is not properly
performed.
Identify the positive and negative
PV terminals, and rewire.
1. The ACC/DEC is too fast.
2. The inverter power is too
low.
3. The load suddenly changes
or is abnormal
4. The grounding is short
circuited.
1. Increase the ACC/DEC time.
2. Use an inverter with greater
power.
3. Check whether the grounding
or cable connection is short
circuited or whether the rotation
is blocked.
The solar panel input voltage
is too high or the model is
380V but set to 220V.
1. Reduce the serially connected
solar panels.
2. Check and reset the model.
1. The power of the serially
connected solar panels is too
low, or it is rainy and cloudy.
2. The starting current of the
motor is too high.
1. Increase solar panels or test it
again under normal sunlight.
2. Replace the motor.
The sunlight is weak or too
few solar panels are
configured.
1. The device automatically
operates after the sunlight gets
stronger, and no processing is
needed.
2. Check whether solar panels
are properly configured.
The water pumping tank is
empty.
Check the water pumping tank.
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