Yaskawa GPD503 Drive - Manual (Page 111)

6.2 DISPLAYING FAULT SEQUENCE
Whenever the Fault relay trips and shuts down the GPD 503, the display code of the fault
that caused the trip (except for Illegal Constant [
oPE _ _ ] or Control Function Error
{ CPF _ _ ] ) is entered into a register in NV-RAM memory. This register retains, in
sequence, that fault code and those of up to three immediately preceding the shutdown
failure.
A newly occurring fault code will not change the fault register if it is a recurrence of the
most recently entered fault (i.e. no. 1 position in the memory register).
The contents of this register can be displayed when the GPD 503 is in the Drive mode.
A. After GPD 503 Fault Shutdown (With Power Still Applied).
After the fault sequence has been examined, troubleshoot the most recent fault or enter a
Fault Reset command (by Digital Operator RESET key or external signal at term. 4) to
prepare the GPD 503 for restart of operation.
STEP OPERATION PROCEDURE DIGITAL DISPLAY
1 Before a RESET command is entered, the fault that
caused Fault trip (shutdown) is displayed.
2 Press ^ . The display indicates that this is currently
the first code in the memory register.
3 Continue pressing ^ to display the other codes in
the memory register. After the last register code is
displayed, the sequence will return to the first code.
STEP OPERATION PROCEDURE DIGITAL DISPLAY
o C
1 o C
2 o u
3 o H
1 o C
Table 6-2. Displaying Fault Sequence After Fault Shutdown
6-4