Chapter 8 Troubleshooting|VP3000 
551 
 
Output phase loss V 
phase (OPHL)   
V phase output phase loss 
Pr. H3-03 
Pr.  H3-04:  When  enabling  the  output  phase  loss  detection  function  before 
starting, the confirmation time is half of this time, and the parameter H3-03 is only 
used in normal operation 
Fault Treatment Parameter 
Pr. H3-05 
0: Warning & continue OPER 
1: Fault & Ramp to Stop 
2: Fault & Auto-Decel 
3: Fault & coast to stop 
4: Fault & by Quick Stop Time 
Records when Pr. H3-05    ≠ 0, H3-05 is “Fault” 
Unbalance three-phase 
impedance of the motor 
Check if the wiring is incorrect 
Check the cable. 
Replace the cable. 
Check if the motor is a single-
phase motor 
Choose a three-phase motor. 
Check if the current sensor is 
broken 
Check if the control board cable is loose. If yes, reconnect the cable and run the 
drive to test. If the error still occurs, return to the factory for repair. 
Check if the three-phase current is balanced with a current clamp meter. If the 
current is balanced and the OPHL error still shows on the display, return to the 
factory for repair. 
If capacity of the drive is larger 
than the motor 
Choose the matches capacity of the drive and motor.