A. If a fault is reset either from the digital operator or a multi-function input, ALL FAULT
INFORMATION WILL BE LOST.
B. If one or more faults occur simultaneously and are NOT reset (by digital operator,
multi-function input, or cycling power), up to four faults can be displayed by pressing the
“up arrow” key.
C. Whenever the Fault relay trips and power is removed from the drive without the fault
being reset, 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
following the shutdown.
A newly occurring fault code will not change the fault register if it is a recurrence of the
most recently entered fault.
The contents of this register can be displayed by following the steps in Table 6-3.
After the fault sequence has been examined, troubleshoot the most recent fault before
entering a Fault Reset command (by Digital Operator STOP/RESET key or external signal
at term. S4) to prepare the drive for restart of operation.
STEP OPERATION PROCEDURE DIGITAL DISPLAY
1
Press until the Keypad display shows
" Monitor U-01 Frequency Ref ".
2 Press until " Monitor U-09 Fault
History " appears on the display.
3 Press .
4 Press . The display indicates that
this is currently the next
code in the memory register.
5 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.
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