Delta LV fault code meaning

Delta / LV

Series: VFD-L

Undervoltage (indicator flashes five times, then pauses for two seconds)

AC motor drive

Meaning: The voltage on the internal high-voltage DC side of the AC motor drive is too low.

Possible causes

Source: Delta VFD-L Series AC Motor Drive User Manual, Error Message Indications and Troubleshooting P13

Series: VP3000-E, VP3000

Undervoltage

AC motor drive

Meaning: Before the AC motor drive runs, the voltage on the internal high-voltage DC side is detected to be below the value set in parameter H1-02.

Possible causes

Power failure occurred
Supply voltage fluctuation
Check whether a large-capacity motor is starting.
Increase the capacity of the power supply system equipment.
Load too large

Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P255; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P292