Failure No.

Failure code

Failure description

Potential causes

Solutions

Number

01

E. SC

Output short circuit fault

1. Output short circuit or grounding

2. Heavy load

1. Check the wiring

2. Seek for technical support

01H

02

E. OC1

Over current protection when acceleration operates

1. Acceleration time is too short

2. The torque is too high or the V/F curve doesn't fit

1. Prolong acceleration time

2.Reduce torque, boost voltage and Adjust V/F curve

02H

03

E. OC2

Over current protection when deceleration operates

Deceleration time is too short

Prolong deceleration time

03H

04

E.OC3

Over current protection when operating with constant speed

Sudden change of load during operation

Reduce load fluctuation

04H

05

E.OC4

Over current because of software

Same as E.OC1, E.OC2, E.OC3

Same as E.OC1, E.OC2, E.OC3

05H

06

E.232.

Internal downlink on communication failure

Hardware problem

Seek for technical support

06H

07

E.Gnd

Ground fault

1.Output grounding of motor or inverter

2.Inverter input and output for line contact

1. Check wiring

2. Check whether the motor is aging

07H

08

E.OU1

Over voltage protection when acceleration operates

1. High input voltage

2. The power supply frequently opens and closes

Check power supply voltage

08H

09

E. OU2

Over voltage protection when deceleration operates

1. Deceleration time is too short

2. Abnormal input voltage

1. Prolong deceleration time

2. Check power supply voltage

3. Install or reselect braking resistor

09H

10

E.OU3

Over voltage protection when operation with constant speed

1. Abnormal power supply voltage

2. There is an energy feedback with load

1.Check power supply voltage

2. Install or reselect braking resistor

0AH

14

E. UL

Underload

1. Inverter output line virtual connection

2. Inverter load disappears

1. Check wiring

2. Check the inverter load

0EH

15

E.OL1

inverter overload protection

1. The load is too large

2. Too short acceleration time

3. The torque is too high or the V/F curve doesn't fit

4. The grid voltage is too low

1. Reduce load or change to larger capacity inverter

2. Prolong the acceleration time

3. Reducing torque boost voltage, Adjust V/F curve

4. Check the grid voltage

0FH

16

E.OL2

Motor overload protection

1. The load is too large

2. Too short acceleration time

3. The protection factor is set too small

4. The torque is too high or the V/F curve doesn't fit

1. Reduce load

2. Prolong the acceleration time

3. Increase the motor overload protection coefficient

4. Reduce torque, boost voltage, Adjust V/F curve

10H

17

E.CUr

Current detection fault

1.Current detection device or circuit damage

2. There are problems with the auxiliary power supply

Seek for technical support

11H

18

E. LU

Running undervoltage

1. Abnormal power supply voltage

2. There is a large load starting in the power grid

1.Check power supply voltage

2. Separate the power supply

12H

19

E.EF1

Frequently opened terminal equipment failure

The external device of the inverter has a signal input

Check signal source and related equipment

13H

20

E.EF2

Frequently closed terminal equipment failure

The external device of the inverter has a signal input

Check signal source and related equipment

14H

21

E.OH

Inverter overheat

1. Blockage of air duct

2. Too high ambient temperature

3. Fan failure

1. Clean the dusts, wools and other objects in the air duct.

2. Lower the ambient temperature and strengthen ventilation and heat dissipation.

3. Replace a new fan of the same model.

15H

22

E.SP1

Input phase loss

1. The input voltage loss phase

2. The input voltage is too low

1. Check the input connector

2. Check the power grid loss phase or not

16H

23

E.SP0

Output phase loss

The connection between inverter and motor is defective or disconnected

Check wiring

17H

24

E.EEP

Memory failure

Hardware failure

Seek for technical support

18H

25

E.End

Run time to

Internal Settings allow running time to arrive

Seek for technical support

19H

26

E. PID

PID feedback failure

1. The PID feedback signal line is disconnected

2. The sensor used to detect the feedback signal has failed

3. The feedback signal is inconsistent with the setting

1. Check the feedback channel

2. Check the sensor for failure

3. Verify that the feedback signal meets the setting requirements or not

1AH

27

E.485

RS485 communication failure

Error sending and receiving data during serial communication

1. Check wiring

2. Seek for technical support

1BH

28

E.doG

disturb

Misoperation caused by ambient electromagnetic interference

The disturbance source and absorption circuit around the inverter

1CH

29

E.232

Internal uplink communication failure

Hardware failure

Seek for technical support

1DH