OPE9 Carrier Frequency Error fault in delta drive

OPE9 Carrier Frequency Error fault in delta drive troubleshooting

Description

OPE9 relates to the IGBT switching frequency (kHz). Delta drives de-rate their current capacity as the carrier frequency increases. If you set a high carrier frequency (e.g., 15kHz) but the drive load requires full current, the drive prevents operation to save the hardware.

Causes

1. Setting Too High: You increased the Carrier Frequency (usually Group 02) to reduce motor noise, but exceeded the thermal limit for the current Load Type (Heavy Duty).
2. Duty Cycle: You are in "Heavy Duty" mode but trying to use "Normal Duty" carrier settings.
3. Ambient Temp: Some intelligent drives de-rate based on temp sensors; if it's hot, high carrier freq is blocked.

Solution

Lower the switching speed:
1. Reduce kHz: Drop the Carrier Frequency setting to default (usually 4kHz to 8kHz).
2. Accept Noise: The motor will be slightly louder (whine) at lower carrier frequencies, but the drive will run cooler and provide more power.
3. Upsize Drive: If you absolutely need high carrier frequency (e.g., for a studio fan), you need a larger drive to handle the de-rating.