Display Of Pu01 Is Abnormal; Phase Loss - Delta VFD-B Series Manual

7.7 Display of PU01 is Abnormal

Abnormal display or no display
Turn the power off and power
on again after display is off
Display normal?
AC motor drive works normally
7.8 Phase Loss (PHL)
Check if the wiring of terminals R, S and T is OK
Check if the screws of terminals are tightened
Check if the input voltage of R, S, T is unbalanced
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact with DELTA.
Revision 10/2005, BE13, SW V4.08
Yes
No
Yes

Phase loss

Yes
Yes
No
Chapter 7 Troubleshooting
Fix connector and eliminate noise
No
Check if all connectors are connected
well and if there is no noise
Yes
AC motor drive has malfunction.
Please contact with DELTA.
No
Connect all three
phase well
No
Tighten all screws
Yes
Please check the wiring
and power system for
abnormal power
VFD-B Series
7-5