Delta LPSE fault code meaning
Delta / LPSE
Series: MP300
Low water pressure
AC motor drive
Meaning: Alarm when 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) P146
Series: VP3000-E, VP3000
Low water pressure error
AC motor drive
Meaning: Pressure feedback is below the water pressure alarm level setting
Possible causes
- Cannot establish water pressure
- Pressure sensor damaged
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P403; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P438