| Issue | Likely Cause | Solution | |-------|--------------|----------| | Unit won’t enter bootloader | Incorrect button sequence or power glitch | Re-check manual timing. Try disconnecting battery backup. | | "UPD file corrupt" error | Mismatched firmware for this exact model or bad SD card | Re-download the correct package. Try a different SD card (≤32GB). | | Update freezes at 50% | Serial cable too long or electrical noise | Use a shielded cable less than 3m. Lower baud rate (e.g., 9600 instead of 115200). | | After UPD, motor runs erratically | Parameters reset to default; autotune required | Perform motor parameter identification (static or rotating autotune). | | Communication errors on fieldbus | UPD changed the default node ID or baud rate | Scan the network or access the communication menu to reconfigure. |
Connecting a WUNF 400 UPD system requires a dedicated industrial control panel. Because three-phase 400V power features balanced current loads, proper phasing is essential to avoid reverse impeller rotation. Phase Monitoring and Protection wunf 400 upd
Connect a continuous, uninterruptible power supply (UPS) to both the host machine and the target hardware. | Issue | Likely Cause | Solution |
: Offers a net volume of 248 litres with five adjustable glass shelves. Try a different SD card (≤32GB)