Fault code3023
BYP COIL SHORTED means the bypass contactor coil is shorted, requiring RBCU replacement. The manual's first action is: “Replace RBCU”
- Model
- ABB ACH550
- Display shows
- BYP COIL SHORTED (3023)
- Type
- Fault code
- Source
- Manual p. 69
What 3023 means
BYP COIL SHORTED p. 69
Common causes
- Shorted contactor coil p. 69
What to do
- Replace RBCU p. 69
Before you service the product, read the safety instructions in the manual p. 2.
If 3023 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 3023; 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.