What Is the Indramat F383 Error Code?

May 12, 2025

Indramat motion control systems were once the gold standard in industrial automation, offering unmatched performance, precision, and reliability. Though the company ceased production in 2001, its legacy products—servo drives, motors, power supplies, and controllers—remain in operation worldwide due to their remarkable durability and long service life.

One such product still widely used is the DIAX04 drive controller, which works in tandem with HVR power supply modules. When an error occurs in the system, the controller displays fault codes to help with troubleshooting. One of these codes is the F383 error, a line voltage fault.

What Does the F383 Error Code Mean?

The Indramat F383 error code is a non-fatal fault that appears on the H1 status indicator of the DIAX04 drive controller. It specifically points to a line voltage issue originating from the HVR power supply module.

According to Indramat documentation, this error indicates:

"Line voltage too high – mains voltage exceeded the permissible range."

Although it won’t immediately shut down the system, the F383 error signals a potential overvoltage situation that can lead to long-term damage if not corrected.

Causes of the F383 Error Code

This fault is triggered when the incoming mains voltage to the HVR power supply exceeds the manufacturer's preset limits. While the module is designed to regulate and stabilize DC output across multiple drives, extreme variations in AC input can exceed its compensation threshold.

Key causes include:

Overvoltage from the power grid
Voltage spikes or surges
Incorrect transformer configuration
Mains supply not within the range of 3 x 380–480 V (+10%)

Highlights of the HVR Power Supply Module

The HVR module is a crucial component in many Indramat-based control systems. Here’s why:

Stable DC Supply: It delivers regulated DC power to connected DKC servo drives.
Energy Regeneration: Excess energy is fed back into the grid, minimizing heat dissipation and energy waste.

This makes the HVR an excellent solution for systems that require consistent voltage control, especially during load fluctuations.

FAQs

How Can I Prevent the F383 Fault Code?

To avoid triggering this code:

Ensure the mains voltage is within 3 x 380 V to 480 V, and does not exceed this by more than 10%.
Use a matching transformer if voltage fluctuations are frequent or you are in a region with unstable supply.
Install surge protection devices and monitor the power quality in real time.

What Should I Do If I See the F383 Error?

Immediately measure the incoming line voltage to the HVR module.
Reduce the voltage to fall within the acceptable tolerance range.
If required, install a step-down transformer or contact your power utility for voltage correction.

While it is not fatal, continuing operation with high line voltage can result in system damage over time—especially to sensitive servo drives and control components.

Can I Fix the F383 Error In-House?

In some cases—such as confirming voltage levels or installing a transformer—your in-house maintenance team may be able to resolve the issue. However, Indramat systems are not generally designed for internal repair by untrained personnel.

For best results, it’s recommended to work with experienced professionals who understand Indramat architecture.

For more information , contact PLG Automation:Email: sales@plgautomation.comPhone: 800-906-9271