The fault code of the frequency converter, hoping to facilitate everyone to better eliminate the fault problems that occur collectively

* Source: * Author: admin * Time: 2025-09-15 14:24:00 * Browse: 62

In recent years, our country has introduced a series of supportive policies for the mechanical and

electrical industry, which has developed rapidly, especially the progress of frequency conversion

technology has been more obvious. However, when a frequency converter is in use and there is a fault,

various codes will appear. Today, we will introduce the fault codes of Yaskawa frequency converters to

you, hoping to help you better troubleshoot the common fault problems.

1. uv1: This fault code indicates that during the low-voltage operation of the main circuit, the main

circuit voltage is lower than the low voltage elimination standard. After such a problem occurs,

the main thing is to check the power supply voltage and wiring A.

2. dc: This fault code indicates that the low-voltage detection standard is abnormal.

3. uv2: This fault code indicates that the control loop voltage is lower than the detection standard for

low voltage. After the problem occurs, the main task is to check whether the capacity of the power

supply is normal.

4. uv3: This fault code indicates that the pre-charged contactor a is open-circuited when the internal

electromagnetic contactor is in operation.

5. uv: This fault code indicates that the DC voltage is below the detection standard for low voltage.

The solution to the problem after it occurs is to pre-charge the contactor.

6. oc: This fault code indicates that the output current of the overcurrent inverter exceeds the

oc standard. After the problem occurs, the main task is to check whether the impedance rescue

of the motor is normal.

7. gf: This fault code indicates that the grounding current on the output side of the frequency converter

exceeds 50% of the rated current of the frequency converter. After the problem occurs, the main task

is to check whether the insulation of the motor has cracked.

8. ov: This fault code indicates that the DC voltage of the overvoltage group circuit is higher than the

overvoltage elimination standard. The solution after the problem occurs is to extend the deceleration

time and install a braking controller.