Yaskawa DSD 406 - Manual (Page 64)

4 Maintenance
60 Power Conversion Unit Diagnostics
3/21/96
❏ Press the DATA/FCTN key to exit the PCU diagnostic routine and return
to the "Function" level. The SCDU displays:
➊
If the PCU detects one or more open AC fuses, it displays the fault code
for a blown fuse ( F910 ):
❷
If the PCU detects one or more shorted SCR/doubler packs, the SCDU
displays the fault code for a shorted doubler ( F911 ):
❏ Remove power from the drive, consult the Maintenance Guide, or call
MagneTek for assistance, to replace the SCR(s) that are shorted, and perform
this test again.
If the PCU detected one or more open SCR/doubler packs, the SCDU
displays the fault code for an open SCR/doubler pack ( F912 ):
❏ Remove power from the drive, consult the Maintenance Guide, or call
MagneTek for assistance, to replace the SCR(s) that are open, and repeat this
test until the SCDU displays the 'PASS' massage.
OFF
DATA
998
OFF
DATA
f910
OFF
DATA
f911
OFF
DATA
f912