Phase Loss (Phl) - Delta HES Series User Manual

Chapter 5 Methods of Anomaly Diagnosis

5-8 Phase Loss (PHL)

Are main circuit power terminals R, S, and T all
breaks down or malfunctions due
to noise. Please contact Delta for
|HES Series
Power supply suffers
phase loss
connected completely
Yes
Are all screws on terminal
plate tightened
Yes
Is voltage of the three phase
power supply unbalanced
No
It's likely hybrid servo controller
assistance.
No
No
Tighten all screws
Please check wiring and
Yes
5-10
Connect the thres
phases securely
power system for
abnormal behavior