64
Fault Name Fault Cause Fault Level Corrective Method
Control cabinet
temperature
fault
The temperature
inside the control
cabinet is exces-
sively high
Important
1. Check whether the grid volt-
age is normal.
2. Check whether the control fan
is normal.
3. Check the AC filter system.
Check whether there are abnor-
malities on the surface of the AC
filter capacitor, such as cracking.
If necessary, check whether the
three-phase current of the ca-
pacitor is balanced.
DC under-
voltage
DC input voltage
is excessively low.
Important
1. In the shutdown state, check
whether the DC voltage dis-
played on the inverter is consis-
tent with the measured value.
2. If not, check whether the DC
side cables are shorted or
wrongly connected.
DC (Bus)
under-voltage
DC bus voltage is
excessively low.
Important
Please refer to the troubleshoot-
ing method of “DC under-
voltage”.
Neutral point
shift
Voltage exists be-
tween the positive
and negative
poles of the DC
side of the inverter
and the neutral
point potential.
Important
1. Check whether the DC side
voltage of the inverter is short-
circuited, whether the input volt-
age exceeds the allowable
range, and whether the grid volt-
age is abnormal.
2. Check whether DC over-volt-
age, DC under-voltage, module
fault, AC over-current, and other
faults exist at the same time in
the historical fault interface. If so,
refer to the troubleshooting
methods of related faults.
10 Troubleshooting System Manual
To Next Page
Loading...
Need help?
General