Sveba-Dahlen InF4

What does Sveba-Dahlen InF4 mean?

The SD-180's Schneider frequency converter has detected that internal data values stored within the drive are incompatible with each other. This typically indicates that the parameter set held in memory does not match the hardware configuration present, often following a firmware update, card swap, or memory corruption event.

Symptoms

• InF4 fault code shown on the SD-180 touchscreen at power-up
• Converter refuses to run and outputs no motor drive signal
• Fault reappears immediately after a basic reset without parameter correction
• Settings entered via the touchscreen may not be retained between power cycles
• Oven behaves as if it has been reset to an unknown or default state

Common causes

• Incompatible internal parameter values stored in converter memory
• Firmware update applied to one internal card without updating all associated cards
• Replacement of an internal card with a unit carrying different default parameters
• Memory corruption caused by a power interruption during a parameter save operation
• Parameter set from a different converter model or rating loaded into this unit

Diagnostic steps

1. 01

   Isolate power and wait

   Lock out the SD-180 at the main isolator and wait at least 5 minutes for the DC bus to discharge fully before accessing the converter.

2. 02

   Perform a full factory reset

   Using the SD-180 touchscreen, navigate to the Schneider converter parameter section and perform a complete factory reset to clear incompatible stored values. Refer to the SD-180 touchscreen service manual for the exact menu path.

3. 03

   Re-enter all required parameters

   After the factory reset, carefully re-enter all site-specific and application parameters for the SD-180 as documented in the commissioning record or the service manual. Do not attempt to run the oven with default parameters alone.

4. 04

   Verify firmware consistency across cards

   Confirm that all internal cards within the converter are running mutually compatible firmware versions as specified in the Sveba-Dahlen SD-180 service documentation for this converter variant.

5. 05

   Test operation and monitor

   Restore power and run the SD-180 through a full operating cycle, monitoring the touchscreen for recurrence of InF4. Log any parameters that fail to save correctly.

When to call a professional

If InF4 returns after a full factory reset and correct parameter re-entry, or if you are unable to identify the original commissioned parameter set, escalate to an authorised Sveba-Dahlen service technician. Incorrect parameter configuration in the Schneider frequency converter can cause motor damage, conveyor faults, or unsafe oven operation.