24
Trouble Shooting
Problem
LCD/LED/Buzzer
Explanation / Possible cause
What to do
Unit shuts down
automatically
during startup
process.
LCD/LEDs and buzzer
will be active for 3
seconds and then
complete off.
The battery voltage is too low
(<1.91V/Cell)
1. Re-charge battery.
2. Replace battery.
No response after
power on.
No indication.
1. The battery voltage is far
too low. (<1.4V/Cell)
2. Battery polarity is
connected reversed.
1. Check if batteries and
the wiring are connected
well.
2. Re-charge battery.
3. Replace battery.
Buzzer beeps
continuously and
red LED is on.
Fault code 01
Fan fault
Replace the fan.
Fault code 02
Internal temperature of
component is over 90°C.
Check if the air flow of the
unit is blocked or the
ambient temperature is too
high.
Fault code 03
Battery is over-charged.
Return to repair center.
The battery voltage is too high.
Check if spec and quantity
of batteries are meet
requirements.
Fault code 04
The battery voltage is too low.
Fault code 05
Output short circuited.
Check if wiring is connected
well and remove abnormal
load.
Fault code 06/58
Output abnormal (Inverter voltage
below than 180Vac or is higher
than 290Vac)
1. Reduce the connected
load.
2. Return to repair center
Fault code 07
Overload error. The inverter is
overload 101% and time is
up.
Reduce the connected load by
switching off some
equipment.
Fault code 20
BMS communication failed
1. Check the BMS
communication wire to see if
it’s well connected
2. Check the transceiver signal
Fault code 51
Over current or surge
Restart the unit, if the error
happens again, please return
to repair center.
Note: To restart the inverter, all power sources need to be disconnected. After the LCD screen light is off, only
use the battery to boot.
