31
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. Internal fuse tripped.
1. Contact repair center for
replacing the fuse.
2. Re-charge battery.
3. Replace battery.
Mains exist but the
unit works in
battery mode.
Input voltage is
displayed as 0 on the
LCD.
Input protector is tripped
Check if AC breaker is tripped
and AC wiring is connected
well.
No indication.
Insufficient quality of AC power.
(Shore or Generator)
1. Check if AC wires are too
thin and/or too long.
2. Check if generator (if
applied) is working well or if
input voltage range setting is
correct. (UPS
Appliance)
No indication.
Set “SUB” (solar first) as the
priority of output source.
Change output source priority
to “USB” (utility first).
When the unit is
turned on, internal
relay is switched on
and off repeatedly.
LCD display is
flashing.
Battery is disconnected.
Check if battery wires are
connected well.
Buzzer beeps
continuously and
red LED is on.
Fault code 07
Overload error. The inverter is
overload 110% and time is up.
Reduce the connected load by
switching off some
equipment.
If PV input voltage is higher than
specification, the output power will
be derated. At this time, if
connected loads is higher than
derated output power, it will cause
overload.
Reduce the number of PV
modules in series or the
connected load.
Fault code 05
Output short circuited.
Check if wiring is connected
well and remove abnormal
load.
Temperature of internal converter
component is over 120°C.
Check whether the air flow of
the unit is blocked or whether
the ambient temperature is
too high.
Fault code 02
Internal temperature of inverter
component is over 100°C.
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 01
Fan fault
Replace the fan.
Fault code 06/58
Output abnormal (Inverter voltage
below than 190Vac or is higher
than 260Vac)
1. Reduce the connected
load.
2. Return to repair center
Fault code
08/09/53/57
Internal components failed.
Return to repair center.
Fault code 51
Over current or surge.
Restart the unit, if the error
happens again, please return
to repair center.
Fault code 52
Bus voltage is too low.
Fault code 55
Output voltage is unbalanced.
Fault code 59
PV input voltage is beyond the
specification.
Reduce the number of PV
modules in series.
