Yaskawa DSD 406 - Manual (Page 78)

4 Maintenance
74 Troubleshooting Guide
3/21/96
Fault/Error Possible Causes &
Code
Fault/Error Name
Corrective Actions
Table 3. Troubleshooting Guide – Continued
920
921
922
923
Load Voltage Setting Error
Bridge Fault
Frequency Setting Error
Load Current Setting Error
Setting for Rated Armature Voltage is not
within the acceptable range of 150-700 Vdc.
If a setting of zero is selected, the drive will
sense the line voltage and output a
corresponding Armature Voltage.
➊
Check setting and adjust as required.
1. Connector J14 is out of place.
2. Faulty Armature Interface PCB.
3. Faulty DSD Drive Control PCB.
➊
Verify J14 is in proper location.
❷
Replace Armature Interface PCB. See
“Replacing the Armature Interface PCB”/
Maintenance Section.
❸
Replace Drive main PCB.
See “Replacing DSD Drive Control
PCB”/Maintenance Section.
Setting for Source Frequency is not within
the acceptable range of 48 to 62 Hz or zero
(the drive will default to 60 Hz if zero is
entered).
➊
Check setting and adjust as required.
Setting for Rated Armature Current is not
within a range of 1/8 to 2 times the nominal
bridge current rating.
Also see the possible
causes for F921.
➊
Check setting and adjust as required.