Yaskawa DSD 406 - Manual (Page 65)

Fault/Error Possible Causes &
Code
Fault/Error Name
Corrective Actions
120 VAC control power is not present.
➊
Check any circuit breakers or fuses in
this circuit. See “Replacing Fuse(s)”/
Maintenance Section.
❷
Check connection at J11. See
“Connectors on Drive Control PCB”/
Maintenance Section.
Each line indicates a blown fuse.
➊
Check for blown fuses. See “Replacing
Fuse(s)”/Maintenance Section.
❷
Check cable connection at J14. See
“Connectors on Drive Control PCB”/
Maintenance Section.
❸
Check for proper 3 phase voltage applied.
P.L.
– – –
– –
–
Control Power Loss
● Line Fuse(s) Open
4 Maintenance
61 3/21/96
Troubleshooting Guide
Troubleshooting
Guide
This section lists the fault and error codes along with their possible causes and
corrective actions. The possible cause(s) are listed in order of most likely to
least likely. The corrective actions are listed in order of simplest to most difficult
to perform.
Use the procedures listed in Section 3, Operation, to display and clear the faults
and errors listed in Table 3.
NOTES
● ............... Bulleted Faults/Errors require a microprocessor reboot. Press
the RESET button located on the main PCB or remove and
reapply 120VAC control power.
DCU ........ (Drive Control Unit) This is the microprocessor that primarily
executes the PAC code. This code is customized to user
applications.
PCU ........ (Power Conversion Unit) This is the microprocessor that
primarily executes the standard code and controls the firing of
the SCRs.
EPROM ... Type of memory chip, “Erasable Programmable Read Only
Memory”.
PAC ........ DSD custom software, “Programmable Application Control”
language.
Table 3. Troubleshooting Guide