Delta BLD-E1 Series 5.7 Keypad Display is Abnormal , 5.8 Phase Loss (PHL)

| BLD-E1 Series
Revision May 2009, 00DE, V0.50 5-5
5.7 Keypad Display is Abnormal
Abnormal display or no display
Cycle power to brushless DC
motor drive
No
Yes
Yes No
Yes
Display normal?
Brushless DC motor drive
works normally
Fix connector and elimi nate noi se
Check if all connectors are connect
correctly and no noise is present
Brushless DC motor drive has
malfunction. Please contact DELTA.
5.8 Phase Loss (PHL)
Phase loss
No
No
Yes
Yes
Check wiring at R, S and T terminals Correct wiring
Check if the screws of terminals are tightened No Tighten all screws
Yes Please check the wiring
and power system for
abnormal power
Maybe brushless DC motor drive has malfunction or
misoperation due to noise. Please contact DELTA.
Check if the input voltage of R, S, T is unbalanced