Delta HPS fault code meaning
Delta / HPS
Series: MP300
High water pressure
AC motor drive
Meaning: Alarm when water pressure exceeds the setting.
Possible causes
- Pressure sensor damaged
- Pump open detection frequency setting too high
Source: MPD_MP300 Series User Manual (DELTA_IA-MDS_MPD_UM_SC_20260326) P145
Series: VP3000-E, VP3000
High water pressure error
AC motor drive
Meaning: Pressure feedback is above the water pressure alarm level setting
Possible causes
- Water pressure cannot be reduced
- 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