Delta LPSn fault code meaning
Delta / LPSn
Series: MP300, VP3000-E, VP3000
Low water pressure warning
AC motor drive
Meaning: An alarm is generated when the water pressure falls below the setting.
Possible causes
- Cannot establish water pressure
- Pressure sensor damaged
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P332; VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P491; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P527