What is OL1, OL2 overload alarm inverter and how to handle it?

In addition to errors such as overvoltage, undervoltage, overcurrent, the OL1, OL2 overload alarm inverter is also a common error during use. So the cause and how to fix the inverter overvoltage? Please follow this article to learn about the OL1, Ol2 overload error on the inverter.

1 – What is OL1, OL2 overload alarm inverter??

OL error code stands for Over Load. This is an error that often appears when accelerating or during the operation of the inverter. So what are OL1 and OL2? How is the difference?

OL1 is an Inverter, indicating motor overload, compared to the capacity due to the motor’s parameter settings, the actual power feedback is overloaded.

OL2 is an inverter overload, meaning that the inverter receives a power signal about the overload compared to its actual capacity. For the OC overcurrent error, when it receives a response, it will immediately report it, but with the OL error, it will be based on the calculation of the current multiplied by the voltage, from which it knows the capacity if the threshold is exceeded, the error will be reported.

2 – Cases of inverter overload

2.1 – Inverter indicates overload OL1, Ol2 when starting up

The inverter indicates overload when there is a command to run and the inverter starts slowly, in this case the motor may be stuck in load. That leads to high amps causing the inverter to not work. When this happens, you should check the engine for mechanical jams, see if the bearings are still in good working order.

After checking all of the above problems but still can’t fix the error, you can try to fix it as follows:

+ Firstly, depending on the application, you change the acceleration or deceleration time to be long or short.

+ The second is to change the v/f curve to make the engine start better

Inverter overload may also be due to the output phase loss leading to phase difference, so the motor is overloaded, then the inverter will also report overload error.

2.2 – Inverter indicates overload OL1, OL2 while running

There are times when the inverter is operating, it shows an overload error, this is a fairly common case. In this case, it may be because the inverter capacity is smaller than the actual power of the motor.

So you need to re-measure the motor’s amps when running under load to calculate the motor’s power. Then review the capacity of the inverter, with a light-loaded inverter, it should be changed to a higher capacity 1 level or a heavy-duty inverter.

In addition, the inverter overloads OL1, OL2 may be due to the incorrect setting of motor parameters such as frequency, rated voltage.

If you have questions or need support about the inverter, please contact Hotline 0896 422 224 for the best solution.