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If all of the above methods have been tried, the product still not work properly. 
The internal circuit of the product may be out of order. Please return the 
product to the supplier for maintenance.

Do not use it when the 
battery is charging. Check 
the rated voltage of the 
battery and make sure that it 
is in the allowable range of 
the input voltage 

1.  The switch is off.
2. The battery lead isn't 
connected well 

Cut off the load and let it 
cool naturally for 10 to
30 minutes. Restart it after it 
resumes to normal 
temperature. The load 
power is too large, reduce 
the total load power to the 
range of rated power. Avoid 
blocking the vent and 
improve the ventilation 
condition. Reduce the 
ambient temperature.

1. Turn on the power switch. 
2. Check the cables and 
make sure they are tightly 
connected.

Welcome to use GIANDEL power inverter. If you have any query during using our 

inverter, please contact our service team by email: [email protected] 

3. Overload protection(OL)n: The inverter will automatically shut down when the load 

is  higher  than  the  rated  power.  LED  display  will  indicate  “OL”.  The  buzzer  will 
whistle  continuously.  Turn  off  the  inverter  and  resume  to  normal  operation  after 
taking away the excessive load.

4. Short-circuit protection: The AC output will be automatically shut down when short 

circuited.  And  LED  display  will  indicate  “OL”    It  will  automatically  reset  after  the 
problem is solved.

5. Thermal protection(OH): The unit will get hot during operation. If the temperature is 

higher  than  149°F,  the  inverter  will  automatically  shut  down.  LED  display  will 
indicate  “OH”Then  the  buzzer  will  whistle  continuously  and  the  green  light  is  off, 
red  light  is  on.  Please  turn  off  the  inverter,  and  continue  using  it  after  the 
temperature goes back to normal naturally. Meanwhile find out the factors causing 
the  fault,  such  as  ventilation,  ambient  temperature,  vent,  load  power  etc.  It  can 
avoid similar issues from happening again.

Reduce a load power,
or turn on the appliance 
first, then turn on the 
inverter. 

1. Use a true RMS multimeter
    to measure, such as the 
    model FLUKE 177/179.
2.Try to maintain the input
   voltage in the range of 
   rated power 
3.Change the battery of the 
   multimeter then test again.

1.  RMS Multimeter 
measurement error
2.  The battery power of RMS 
Multimeter is low.
The input voltage is too high 
or too low 

While using with 
TV or audio, there 
is snowflake on 
the screen or noise 
from the audio. 

1. Keep the inverter far from 
antenna.
2. Use screened antenna. 

5.

6.

L. Troubleshooting Tips

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