Alarm code4007
PCB TEMP indicates the RBCU unit has reached a critical temperature due to cooling failure or ambient heat. The manual's first action is: “Stop drive and let cool down and restart Add additional cooling Replace RBCU”
- Model
- ABB ACH550
- Display shows
- PCB TEMP (4007)
- Type
- Alarm code
- Source
- Manual p. 72
What 4007 means
PCB TEMP p. 72
Common causes
- RBCU unit reached 181 degrees Fahrenheit, 83 degrees Celsius p. 72
- Cabinet cooling has failed p. 72
- Ambient conditions too high p. 72
- Bad RBCU unit p. 72
What to do
- Stop drive and let cool down and restart Add additional cooling Replace RBCU p. 72
Before you service the product, read the safety instructions in the manual p. 2.
If 4007 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 4007; 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.