6. Troubleshooting
Problem
LCD/LED/Alarm Possible Cause
Unit shuts down
LCD/LED and
automatically
alarm will be
during startup
active, then turn
process.
off.
No response
No indication.
after power on.
Input voltage is
displayed as '0'
on the LCD and
green LED is
Mains exists,
flashing.
but the unit
operates in
Battery Mode
LED is flashing.
When the unit
is turned on,
LCD display and
internal relay is
LED flashing.
switched on and
off repeatedly.
Warning code 05
Audible
Warning code 06 Fan fault
alarm beeps
continuously
Warning code 01
and the red
Warning code 04
LED is on.
Warning code 07
Warning code 21 The solar voltage is too high.
Fault code 04
Fault code 05
Fault code 06
Audible
alarm beeps
Fault code 11
continuously
and red LED is
on.
Fault code 12
Fault code 13
Fault code 21
Fault code 23
Fault code 22
Fault code 24
The battery voltage is too low.
1. The battery voltage is too
low.
2. Internal fuse tripped.
Input protector is triggered.
Insufficient quality of AC
power.
Battery is disconnected.
Internal temperature of inverter
component is over 85°C.
The battery voltage is high or
low.
Battery is overcharged.
Battery temperature fault.
Overload error, the inverter
is overloaded 100% and
overload time reaches the
upper limit.
Output short-circuited.
Internal temperature of
inverter component is over
85°C.
The battery voltage is too
high.
Fan locked fault.
The solar voltage is too high.
The solar voltage is too low.
PV over-temperature fault.
Solar charge stops due to
overload.
21
Resolution
1. Recharge battery.
2. Replace battery.
1. Contact repair center for replacing the fuse.
2. Recharge battery.
3. Replace battery.
Check if AC breaker is turned on and AC
wiring is connected.
1. Check if AC wires are too thin and/or too
long.
2. Check if generator (if applied) is operating
properly or if input voltage range setting
is correct. (UPS appliance) change output
source
Check to make sure battery wires are
properly connected.
Check whether the environment around the
equipment is well ventilated.
Replace the fan.
Check to make sure battery specifications
and quantities meet requirements.
Return to repair center.
Reduce solar panels.
Check whether the battery temperature is too
high, the BTS cable to the battery is loose,
and open the cover to check whether the BTS
cable to the control board is loose.
Reduce the connected load by switching off
some equipment.
Check to make sure wiring is connected
properly and remove abnormal load.
Check whether the environment around the
equipment is well ventilated.
Check to make sure battery specifications
and quantities meet requirements.
Replace the fan.
Check the input voltage of the solar panel.
1. Improve the use environment.
2. Check the temperature sensor for damage.
3. Return to the maintenance center.
1. Check the battery for damage.
2. Return to the maintenance center.