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 FAQ

1.Inverter shows POFF when turn-on
A:Probable reasons:1)too low input voltage 2)phase-loss board doesn’t work
                                 3)main control board doesn’t work 4)wrong voltage setting
 
2.Invalid terminals functions
A: Probable reasons:1) short-circuit copper board between terminal +24V and PW is missing 2) terminal +24V voltage is        abnormal 3) terminal broken 4) wrong terminal polarity setting 5) improper parameters setting
 
3.No signs when turn-on  
A:If power signal light is on, probable reasons of keypad no-signs fault:1) drive power board damages or short circuit
2) bad keypad wires connection or keypad burns down 3) main control board damage 4)keypad display error.
If power signal light is off, probable reasons:1) input power failure 2)the fuse is broken 3)rectifying bridge damage
 
4.Signal interference
A:Inverter is a harmonic source which can cause interference on control devices. Correct grounding is important, so the inverter is needed to ground independently, which can reduce 60% of interference of devices.
 
5.How to determine if main circuit works well
A:Use the electric meter, turn to diode stall, the negative of meter points to inverter “+” and the positive points to inverter input terminals R,S,T and output terminals U,V,W. R,S,T terminals rectifying bridge voltage drop is about 0.26~0.38V,U,V,W modules voltage drop is 0.3~0.38, and these three phases are in balance. Turn around to determine, the positive of meter points to inverter “-”, results are the same. So, it shows the main circuit is normal.

6.Press STOP button, the inverter doesn’t stop and shows no error.
A: If the voltage is low, the main reasons:1) the inverter buttons are not good.2) the inverter reduces the speed so fast after pressing STOP button, the load inertia is large and braking units are not equipped.3) main control board is broken.4) deviation from self-learning is too large.
 
7.Typical error code

Code

Type

Reason

Solution

E.oC1

        ACC running overcurrent

1. The acceleration is too fast

2. The grid voltage is too low

3. The inverter power is too small

1. Increase the ACC time

2. Check the input power

3. Select the inverter of larger power

E.oC2

        DEC running overcurrent

1. The deceleration is too fast

2. Load inertia torque is too large

3. The inverter power is too small

1. Increase the DEC time

2. Add the appropriate energy consumption braking components

3. Select the inverter of larger power

E.oC3

     Constant speed running overcurrent

1. Load sudden change or abnormal

2. The grid voltage is too low

3. The inverter power is too small

1. Check load or decrease load sudden change

2. Check the input power

3. Select the inverter of larger power

E.oU1

       ACC running overvoltage

1. The input voltage is abnormal

2. After instantaneous power failure, restart the rotating motor

1. Check the input power

2. Avoid restart at stop

E.oU2

         DEC running overvoltage

1. The deceleration is too fast

2. The load inertia is too large

3. The input voltage is abnormal

1. Increase the DEC time

2. Add the appropriate energy consumption braking components

3. Check the input power

E.oU3

      Constant speed running overvoltage

1. The input voltage has changed abnormally

2. The load inertia is too large

1. Install the input reactor

2. Add the appropriate energy consumption braking components

E.Lv

       Bus under-voltage

The grid voltage is too low

Check the grid input power

E.oUT1

      Converter unit U-phase fault

1. The acceleration is too fast

2. The internal IGBT is damaged

3. Interference causes malfunction

4. The grounding is good

1. Increase the ACC time

2. Ask for service

3. Check if the peripheral devices have a strong interference source

E.oUT2

      Converter unit V-phase fault

E.oUT3

      Converter unit W-phase fault

E.oL1

        Motor overload

1. The grid voltage is too low

2. The motor rated current is not set correctly

3. Motor stall or load sudden change

4. Motor power is much larger than load power

1. Check the grid voltage

2. Reset the motor rated current

3. Check the load and adjust the torque boost

4. Select the appropriate motor

E.oL2

      Inverter overload

1. The acceleration is too fast

2. Restart the rotating motor

3. The grid voltage is too low

4. The load is too large

1. Reduce the acceleration speed

2. Avoid restart at stop

3. Check the grid voltage

4. Select the inverter of larger power

E.oL3

                 Overload          pre-warning

1. The load is too heavy

2. The motor parameters are not correct during vector control

3. The grid voltage is too low

1. Select a larger inverter

2. Carry out motor rotation autotuning

3. Check the grid voltage

E.oH1

          Rectifier module overheating

1. Instantaneous overcurrent of the inverter

2. Phase or ground short circuit of output three phases

3. The duct is blocked or the fan is damaged

4. The ambient temperature is too high

5. The wiring or connectors of the control board is loose

6. The auxiliary power supply is damaged and the drive voltage is undervoltage

7. The power module bridge is conducted

8. The control board is abnormal

1. Refer to overcurrent solutions

2. Redistribution

3. Dredge the duct or replace the fan

4. Reduce the ambient temperature

5. Check and reconnect

6. Ask for service

7. Ask for service

8. Ask for service

E.oH2

       Converter module overheating

E.ILF

    Input phase loss

Input R, S, T phase loss

1. Check the input power

2. Check the installation and wiring

E.OLF

      Output phase loss

1. Output U, V, W phase loss

2. Serious asymmetry of load three-phase

1. Check the output wiring

2. Check the motor and cable

E.bC

    Braking unit fault

1. Braking wiring fault or braking tube damaged

2. The external braking resistance is too small

1. Check the braking unit and replace a new braking tube

2. Increase the braking resistance

E.AUT 

       Motor autotuning fault

1. The motor capacity does not match with the inverter capacity

2. Incorrect setting of motor rating parameters

3. The deviation between autotuning parameters and standard parameters is too large

4. Autotuning timeout

1. Replace the drive model

2. Set the rated parameters according to the motor name plate

3. Make the motor at no load and re-identification

4. Check the motor wiring and parameters setting

E.PIDE

   PID feedback disconnection

1.PID feedback disconnection

2.PID feedback source disappears

1. Check the PID feedback signal cable

2. Check the PID feedback source

E.485

      Communication fault

1. Incorrect baud rate setting

2. Communication error when using serial communication

3. Communication interruption for a long time

1. Set the appropriate baud rate

2. Press the STOP/RESET key to reset and ask for service

3. Check the wiring of communication interfaces

E.EF

External fault

SI external fault input terminal operation

1. Check the external device input

E.EEP

        EEPROM read and write fault

1. Control parameters read and write error

2.EEPROM damaged

1. Press the STOP/RESET key to reset and ask for service

2. Ask for service

E.END

         Running time arrival

User trial time arrival

Ask for service

E.ITE

         Current detection circuit fault

1. The connector of the control board is in poor connection

2. The auxiliary power supply is damaged

3. Hall device is damaged

4. Amplifier circuit is abnormal

1. Check the connector and reconnect

2. Ask for service

3. Ask for service

4. Ask for service

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