oH
oH on DELTA inverters: Drive overheat
DELTA inverters: VFD-EL
Disconnect the supply and wait for the capacitors to discharge before opening the inverter or touching its terminals.
Common causes
- High panel or ambient temperature
- Fan stopped or clogged with dust
- Not enough clearance around the drive
- Continuous load near the drive's maximum
Try first
- Clean the heatsink and fan
- Check the drive fan turns
- Leave clearance above and below and ventilate the panel
- If the load stays high, choose a larger drive
