★: For faults that cannot be reset automatically, the cause of the fault must be cleared by turning it off and then on before resetting

▲: After the cause of the fault disappears, the fault can be reset using the automatic restart function. These faults can also be re powered on through the frequency converter or reset through logic input or control bits

●: A fault that can be reset as soon as the cause disappears.

Serial number

fault code

fault name

possible cause

repair measures

1

ANF

★ Load

Encoder speed feedback does not match the given value

1. Check the motor, gain, and stability parameters

2. Add a braking resistor

3. Check the size of the motor/frequency converter/load

4. Check the mechanical connection and wiring of the encoder

2

BRF

★ Mechanical brake failure

The brake feedback contact is inconsistent with the brake logic

1. Check the feedback circuit and brake logic circuit

2. Check the mechanical condition of the brake

3

BUF

★ Short circuit of braking unit

1. Short circuit output of braking unit

2. The brake unit is not connected

1. Check the connection between the brake unit and the resistor

2. Check the braking resistor

4

ECF

★ Encoder Connection

The mechanical connector of the encoder is broken

1. Check the number of pulses and encoder type

5

ENF

★ Encoder

Encoder feedback fault

1. Check the number of pulses and encoder type

6

PCF1

★ Output contactor not open

Output contactor not open

Although the opening conditions have been met,

But the output contactor still remains closed

7

HDF

★ IGBT desaturation

Inverter output short circuit or grounding

Check the cable connection between the frequency converter and the motor

And the insulation condition of the motor

8

OCF

★ Overcurrent

1. Incorrect setting of motor control parameters

2. Inertia or load is too large

3. Mechanical locking

1. Check parameters

2. Check the size of the frequency converter/motor/load

9

SCF1

★ Motor short circuit

1. Inverter output short circuit or grounding

2.If several motors are connected in parallel,The output of the frequency converter has a large ground leakage current

1. Check the cable connection between the frequency converter and the motor, and

Insulation condition of the motor

2. Reduce switching frequency

3. Add a motor reactor between the motor and the frequency converter

10

SCF2

★ Impedance short circuit

11

SOF

★ Grounding short circuit

12

SOF

★ Overspeed

Unstable or driving load too large

1. Check the motor, gain, and stability parameters

2. Add a braking resistor

3. Check the size of the motor/frequency converter/load

13

SPF

★ Loss of speed feedback

No encoder feedback signal

1. Check the connection between the encoder and the frequency converter

2. Check the encoder

14

BLF

▲ Brake control

1. Not reaching the brake release power supply

2. When the brake logic controller is assigned,

Only adjust the brake closing frequency threshold (ben)

1. Check the connection of the frequency converter/motor

2. Check the motor winding resistance

3. Check the brake release current (positive)

(Tbr) and [Brake Release Current (Reverse)] (IrD) settings

4. Recommended settings for brake closing frequency (bEn) application

15

CNF

▲ Network

Communication failure on communication card

1. Check environmental conditions (electromagnetic compatibility)

2. Check the connection status

3. Check for timeout

4. Check/repair the frequency converter

5. Change tab

16

OBF

▲ Braking over speed

Excessive braking or excessive inertia of the driving load

1. Increase deceleration time

2. If it is necessary to install a braking resistor

17

OHF

▲ Inverter overheating

The temperature of the frequency converter is too high

Check the motor load, ventilation of the frequency converter, and surrounding temperature,

Wait for the frequency converter to cool down before restarting

18

OLF

▲ Motor overload

Due to excessive motor current triggering a fault

Check the setting of motor thermal protection and inspect the motor load

19

OPF1

▲ Motor missing 1 phase

Inverter output is missing 1 phase

Check the connection between the frequency converter and the motor

20

OPF2

▲ Motor missing 3 phases

1. No motor connected or motor power too low

2. Output contactor open

3. Instantaneous instability of motor current

Check the connection between the frequency converter and the motor

21

OSF

▲ Input overvoltage

1. Main voltage too high

2. Main power supply fluctuation

Check the main voltage

22

SCF5

▲ Motor short circuit

Inverter output short circuit

1. Check the cable connection between the frequency converter and the motor

The situation and the insulation condition of the motor

2. Check/repair the frequency converter

23

SLF1

▲ Modbus communication

Communication interruption on Modbus bus

1. Check the communication bus

2. Check for timeout

24

TJF

▲ IGBT overheating

Inverter overheating

Check the motor load, ventilation of the frequency converter, and surrounding temperature,

Wait for the frequency converter to cool down before restarting

25

PHF

● Input but compare

1. The power supply of the frequency converter is incorrect or the fuse is blown

2. Missing 1 phase

3. Load imbalance

1. Check the power connection and fuse

26

USF

● Undervoltage

1. The main voltage is too low

2. Instantaneous voltage too low

3. Pre charging resistor damaged

Check voltage