13
When the AC output L/N is short-circuited, the inverter automatically turns off the AC output, and fault indicator
and buzzer prompt.
With multiple internal temperature detections, the device under any temperature higher than the device over-
temperature protection will automatically turn off the AC output, and fault indicator and buzzer will prompt;
The AC output will be recovered if the temperature is lower than the over-temperature protection.
If the fan is blocked or not operate for other reasons, the AC output of the inverter can only work within 30% of
the rated output power and will be turned off when the load power is higher than 30% of the rated power.
To ensure that the inverter can run reliably and stably at full power for a long time, please keep a good
installation environment to avoid fan blocking by oil and wire. And check the fan operation regularly.
6. Common problems and solutions
S/N
Phenomenon
Cause
Possible cause
Solutions
1
Red light flashing
slowly, green light
off, buzzer buzzing,
no AC output
Over-low battery
input voltage
1. Excessive voltage drop due
to over-small battery wiring
diameter
2. Low battery power.
1. Choose the suitable wires;
2. Timely charge the battery until the low
voltage recovery voltage can self-restore the
output.
2
3
Overload
Power of load device higher than
rated output power
Check whether the AC load is within the rated
power range of the inverter;
4
Overload
Power of load device higher than
rated output power
Check whether the AC load is within the rated
power range of the inverter; Eliminate the load
overload fault and restart the inverter to restore
normal operation.
5
Red light always on,
green light off, buzzer
buzzing, no AC
output
Load short-circuited
1. AC output of the inverter
short-circuited
2. AC device L/N short-circuited
Check whether the AC load wiring is short-
circuited; Eliminate the load short-circuit fault
and restart the inverter to restore normal
operation.
6
Red light double
flashing, green light
off, buzzer buzzing,
no AC output
Over-high device
temperature
Internal temperature of device
higher than the set over-
temperature protection
Improve the quality of ventilation, clear the
vent, reduce the temperature around the inverter,
and restart the device after the temperature is
reduced. Please derate the amount if
troubleshooting fails.
7
Red light and green
light single flashing,
buzzer buzzing, with
AC output or unable
to reach the rated
power output
Fan fault
Fan blocked by any object
Check whether the fan works properly.
Red light flashing
quickly, green light
off, buzzer buzzing,
no AC output
Over-high battery
input voltage
1. Mismatch between battery
voltage and device system
voltage
Measure the positive and negative terminal
voltage of the device with a voltmeter to
determine whether they are higher than the over-
voltage protection voltage, and recover by
adjusting the input voltage
Red light single
flashing, green light
always on, buzzer
buzzing, with AC
output
Red light single
flashing, green light
off, buzzer buzzing,
no AC output
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7. System maintenance
In order to maintain the best long-term performance, it is recommended to conduct following checks twice a year.
Make sure that the airflow around the inverter is smooth and remove any dirt or debris from the heat sink.
Check whether all exposed wires are damaged by exposure to sunlight, friction with other objects around
them, dryness, bite by insects or rodents, etc. The wires shall be repaired or replaced if necessary.
Verify for the consistency of indicator and display with the operation of the device. Please pay attention to
any faults or errors, and take corrective actions if necessary.
Check all wiring terminals for corrosion, insulation damage, signs of high temperature or burning/
discoloration, and tighten the screws.
Check for dirt, nesting insects and corrosion, and clean up as required.
The arrester failed shall be replaced in time against lightning damage to the inverter or even other device of
the user.
The Company does not assume any liability for damage caused by:
Improper use or use in improper site.
Current, voltage and power of the load exceeding the limit of the inverter.
Temperature in the operating environment exceeding the limited operating temperature range.
Arcing, fire and explosion caused by failure to follow inverter markings or manual instructions.
Disassemble and repair the inverter without permission.
Force majeure.
Damage that occurs in transportation or handling of the inverter
5.4 Output of short-circuit protection
5.5 Over-temperature protection of device
5.6 Fault protection of fan
!
The AC output has three automatic recoveries for inverter's short-circuit protection (the first time delay
is 5S, the second time delay is 10s, and the third time delay is 15s). The AC output will not automatically
recover at the fourth time until restarting the inverter after removing the faults.
!
!
Please keep a good ventilation environment to ensure that the inverter can operate reliably and stably at
full power for a long time.
Danger of electric shock! Make sure that the inverter power is disconnected and the power in the
capacitor is discharged before carrying out the corresponding checks or operations!
!
!
