Delta MH300 Series - Page 826

Chapter 14 Fault CodesMH300
14-99
ID No. Display Fault Name Description
141
GFF occurs before
running
(b4GFF)
The ground short circuit detected
when output
wiring detection is performed before the drive runs.
Action and Reset
Action condition 250% of the rated current
Action time Immediately act
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset in 5 sec. after the fault is cleared.
Record Yes
Cause Corrective Actions
Incorrect motor wiring
Check if the motor’s internal wiring and the UVW wiring of the drive
output
terminal are correct.
Short-circuit at motor output
due to poor insulation wiring.
Without considering the short circuits, check the motor cable
or replace
the cable before turning on the power.
Check for possible burnout or
aging insulation of the motor.
Check the motor insulation value with megger. Replace th
e motor if the
insulation is poor.