START ENABLE 2 alarm occurs when a start command is given but the RUN Enable condition is not satisfied. The manual's first action is: “Run Enable condition is not satisfied. Bad 24v supply Bad digital input 24 V common is not tied to Digital input common on bypass when using external 24 v supply Check 24 Volts on RBCU unit Check for 24 volts on respective DI when condition is satisfied Check Parameter 0103 For status of digital input”
- Model
- ABB ACH550
- Display shows
- START ENABLE 2 VIBRATION SWITCH ... LOW SUCTION PRES (4022)
- Type
- Alarm code
- Source
- Manual p. 74
What 4022 means
START ENABLE 2 VIBRATION SWITCH ... LOW SUCTION PRES p. 74
Common causes
- Alarm will occur when start order is given and the "RUN Enable" is not present p. 74
What to do
- Run Enable condition is not satisfied. Bad 24v supply Bad digital input 24 V common is not tied to Digital input common on bypass when using external 24 v supply Check 24 Volts on RBCU unit Check for 24 volts on respective DI when condition is satisfied Check Parameter 0103 For status of digital input p. 74
Before you service the product, read the safety instructions in the manual p. 2.
If 4022 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 4022; 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.