Page 6–24
DuRApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Chapter 6: Maintenance and Troubleshooting
Fault Name
Fault Code
in Status
Monitor 1
Fault
Descriptions
Corrective Actions
Can be
Bypassed
in Fire
Mode
(Yes / no)
LOCAL
Fault
STL2
STO Loss 2
77
STL2
STO2~SCM2 internal hardware detect error�
(See appendix E for corrective action�)
no
LOCAL
Fault
STL3
STO Loss 3
78
STL3
STO1~SCM1 and STO2~SCM2 internal hardware
detect error�
(See appendix E for corrective action�)
no
LOCAL
Fault
Uoc
U Phase Short
79
Phase U short circuit Yes
LOCAL
Fault
Voc
V Phase Short
80
Phase V short circuit Yes
LOCAL
Fault
Woc
W Phase Short
81
Phase W short circuit Yes
LOCAL
Fault
UPHL
U Phase Loss
82
Output phase loss
(Phase U)
Check to insure that the motor cable is properly
connected to the drive�
Yes
LOCAL
Fault
VPHL
V Phase Loss
83
Output phase loss
(Phase V)
Check to insure that the motor cable is properly
connected to the drive�
Yes
LOCAL
Fault
WPHL
W Phase Loss
84
Output phase loss
(Phase W)
Check to insure that the motor cable is properly
connected to the drive�
Yes
n/a 85~89
reserved n/a n/a
(continued next page)