FAULT DIAGNOSIS AND SOLUTIONS
The inverter is easy to maintain. When you encounter the following problems, please
refer to the Solutions below, and contact the local distributor if the problem remains
unsolved. The following table lists some of the basic problems that may occur during the
actual operation as well as their corresponding basic solutions.
Fault diagnosis table
Content
Cause
Solutions
1. Check whether the load is in compliance
with the maximum power of the machine.
2. Cut off all the power and shut down all
the machines; disconnect the load and plug
in to restart machines, then check whether
the load is short circuited if the fault has
been eliminated.
Bat
Disconnect
The battery is not connected to
the inverter or the battery port
has no output voltage.
Check whether there is voltage at BAT port of
measuring inverter.
1. The battery charge is too low. 1. If the battery is too low, charge it in time.
2. The battery BMS sends an
instruction to prohibit
discharging.
2. Check the battery communication
protocol
Bat low vol
The battery voltage is lower than
the normal working voltage
value.
Charge the battery as soon as possible
1. The PV input voltage exceeds
the MPPT voltage.
1. Check whether PV input voltage is within
MPPT voltage range.
2. The load port and the power
grid port are connected
inversely.
2. Power down the whole machine, and then
power up after the display screen goes out.
BMS
Comm.fail
There is no normal
communication between the
battery and the inverter.
Check whether the communication between
inverter and battery is normal.
Fan Fail
Poor contact of fan
Power down the whole machine, and then
power up after the display screen goes out.
Bus over
vol
The load power exceeds the
inverter power or the output port
is short-circuited.
Over load
Bat under
vol
