5. Fault Diagnostic Methods
5-11
5-8 Phase Loss PHL
Yes
Yes
No
No
No
Yes
Power supply suffers
phase loss
Are main circuit power terminals R, S, and T all
connected completely
Connect the three
phases securely
Are all screws on terminal
plate tightened
Tighten all screws
Is voltage of the three phase
power supply unbalanced
Please check wiring and
power system for
abnormal behavior
It's likely hybrid servo drive breaks
down or malfunctions due to
noise. Please contact Delta for
assistance.
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