Delta Electronics VFD-VL manual Display of KPVL-CC01 is Abnormal, Phase Loss PHL, Yes

Chapter 5 Troubleshooting

5.7 Display of KPVL-CC01 is Abnormal

Abnormal display or no display

Yes

Turn the power off and power on again after display is off

Fix connector and eliminate noise

No

Display normal? No

Yes

AC motor drive works normally

Check if all connectors are connected well and if there is no noise

Yes

AC motor drive has malfunction. Please contact DELTA.

5.8 Phase Loss (PHL)

	Phase loss
			No
Check if the wiring of terminals R, S and T is OK
		Yes

Connect all three phase well

Check if the screws of terminals are tightened		No	Tighten all screws
	Yes

Check if the input voltage of R, S, T is unbalanced

No

Yes

Please check the wiring and power system for abnormal power

Maybe AC motor drive has malfunction or misoperation due to noise. Please contact DELTA.

Revision Nov. 2008, VLE1, SW V1.03 5-5