DEV OVERTEMP means the drive heatsink is overheated due to fan failure, obstructions, dust, ambient heat, or excessive load. The manual's first action is: “R1...R4 & R7/R8: 115 °C (239 °F) R5/R6: 125 °C (257 °F). Check for and correct: Fan failure. Obstructions in the air flow. Dirt or dust coating on the heat sink. Excessive ambient temperature. Excessive motor load.”
- Model
- ABB ACH550
- Display shows
- DEV OVERTEMP (3)
- Type
- Fault code
- Source
- Manual p. 24
What 3 means
DEV OVERTEMP p. 24
Common causes
- Drive heatsink is overheated. Temperature is at or above limit. p. 24
What to do
- R1...R4 & R7/R8: 115 °C (239 °F) R5/R6: 125 °C (257 °F). Check for and correct: Fan failure. Obstructions in the air flow. Dirt or dust coating on the heat sink. Excessive ambient temperature. Excessive motor load. p. 24
Before you service the product, read the safety instructions in the manual p. 2.
If 3 is still not resolved
- contact the factory or your local Authorized Service Center for repair or replacement. p. 2 “Never attempt to repair a malfunctioning ACH550; contact the factory or your local Authorized Service Center for repair or replacement.”
This page summarises what the manufacturer’s manual says about 3; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with ABB. Found a mistake? Report an error.