User Manual Guide for KRC9 Series Inverter (Koreachuan)

I. Detailed Explanation of Operation Panel Functions

1. Overview of Operation Panel Functions
The operation panel of the Koreachuan KRC9 series inverter integrates functions such as parameter setting, status monitoring, and operation control. The core key functions are as follows:

• Programming Key: Enters or exits the menu.
• Enter Key (ENTER): Confirms parameters or navigates to the next menu level.
• Increment/Decrement Keys: Adjust parameter values.
• Shift Key: Switches display interfaces or parameter positions.
• Run/Stop/Reset Key: Controls start/stop or resets the inverter.
• Multi-function Selection Key (MP3): Switches between functional modes.

2. Password Management

• Set Password: Press the MP3 key to select password setting, enter the password, and confirm with ENTER.
• Clear Password: Enter the correct password and press MP3 to exit the password setting mode.

3. Parameter Access Permissions

• Set Restrictions: Enter the parameter setting interface, select parameters, and set permissions (e.g., read-only/write-only).
• Remove Restrictions: Restore permissions to default settings.

4. Factory Parameter Management

• Restore Factory Settings: Set PP-01 to 1 to reset parameters to factory defaults.
• Backup/Restore Parameters: Set PP-01 to 4 to backup parameters, or to 501 to restore from backup.

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II. External Control Setup Guide

1. External Terminal Forward/Reverse Control

• Wiring Instructions:
  • Forward Rotation: Connect to DI1 terminal.
  • Reverse Rotation: Connect to DI2 terminal.
• Parameter Configuration:
  • P0-02: Set to 1 (terminal control).
  • P4-00: Set to 1 (forward rotation).
  • P4-01: Set to 2 (reverse rotation).

2. External Potentiometer Speed Control

• Wiring Instructions: Connect the potentiometer output to AI1 or AI2 terminal.
• Parameter Configuration:
  • P0-03: Set to 2 (AI1 setting) or 3 (AI2 setting).
  • P4-13/P4-14: Set the potentiometer input range and corresponding frequency range.

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III. Fault Codes and Troubleshooting Solutions

1. Common Fault Codes

Fault Code	Description	Possible Causes
Err02	Acceleration Overcurrent	Output circuit grounded/shorted
Err03	Deceleration Overcurrent	Output circuit grounded/shorted
Err04	Steady-state Overcurrent	Output circuit grounded/shorted
Err05	Acceleration Overvoltage	Input voltage too high
Err06	Deceleration Overvoltage	Overvoltage suppression settings improper

2. Troubleshooting Process

1. Identify the Fault: Locate the cause based on the fault code.
2. Check Peripheral Devices: Inspect motors, cables, contactors, etc.
3. Adjust Parameters: Optimize overcurrent/overvoltage suppression settings.
4. Restart the Device: After resolving the fault, restart to confirm normal operation.

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IV. Conclusion

The Koreachuan KRC9 series inverter is a high-performance and reliable device suitable for various industrial applications. By mastering the operation panel functions, parameter settings, external control, and fault handling, users can fully leverage its capabilities and enhance productivity. This guide aims to provide practical references for the use and maintenance of the device.