What causes fault code AB-F015 (PowerFlex 755 F64 - Drive Overtemp)?

Cooling fan assembly failed — fan module LEDs will be red. Cabinet cooling insufficient — A/C unit not keeping up. Drive overloaded — running above continuous current rating. Adjacent drives generating excessive heat in cabinet. Air filter on cabinet intake clogged with dust

How do I fix fault code AB-F015?

Check fan module LEDs — green=OK, red=fault, replace if red. Measure ambient temp in cabinet — should be <40°C (104°F). Clean or replace cabinet air filter. Verify drive current vs rated current — derate if ambient >40°C. Check cabinet A/C or heat exchanger operation. Ensure cabinet doors are fully closed — no air bypass

PowerFlex 755 F64 - Drive Overtemp

AB-F015

PowerFlex 755 drive heatsink or power section temperature exceeded safe operating limit.

medium allen-bradley vfd

allen-bradley powerflex 755 overtemperature cooling

Probable Causes (ranked)

Cooling fan assembly failed — fan module LEDs will be red
Cabinet cooling insufficient — A/C unit not keeping up
Drive overloaded — running above continuous current rating
Adjacent drives generating excessive heat in cabinet
Air filter on cabinet intake clogged with dust

Fix Steps

1 Check fan module LEDs — green=OK, red=fault, replace if red
2 Measure ambient temp in cabinet — should be <40°C (104°F)
3 Clean or replace cabinet air filter
4 Verify drive current vs rated current — derate if ambient >40°C
5 Check cabinet A/C or heat exchanger operation
6 Ensure cabinet doors are fully closed — no air bypass

Field Trick

PF755 fan modules are hot-swappable. Pull the red-LED fan module and swap in the spare. Back online in 2 minutes.

Suggested Replacement Parts

Parts matched to fault category: Vfd Drive

Allen-Bradley PowerFlex 525 AC Drive 1HP P/N: 25B-D2P3N114 1HP, 480V, 3-phase, built-in EtherNet/IP, EMC filter

AutomationDirect $395.00 Amazon $450.00 Grainger $520.00

ABB ACS580 General Purpose Drive 2HP P/N: ACS580-01-05A7-4 2HP, 480V, built-in safe torque off, adaptive programming

AutomationDirect $425.00 Amazon $480.00 Grainger $550.00

GS20 AC Drive 1HP (Budget Option) P/N: GS20-20P5 1HP, 230V, sensorless vector, compact size — good replacement for testing

AutomationDirect $149.00 Amazon $175.00

Prices are estimates. Verify part numbers match your equipment before ordering.

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