UM582127000 User Instructions
Issue AC, January 2, 2013 Spec. No. 582127000 (Model 721NPBB)
Page 24 Chapter 4. Troubleshooting and Repair
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2) If a password screen opens, a password must be entered to allow the User to
make adjustments. If a password was previously entered and has not yet timed
out, skip this step and proceed to step 3). Otherwise, to enter a password, with
the cursor at the User Name field (default is “Admin”), press the down arrow key
to move cursor down to the password line. Press ENT. “0” is highlighted. Press
the up arrow key once to change the “0” to”1” (default password is “1”), then
press ENT twice. (Note: If you have been assigned a unique User Name and
password, follow this procedure to enter these.)
3) With the Manual menu screen displayed, navigate to and select “Converter”
(ENT) / “All Conv Ctrl” (ENT).
4) Navigate to “Clear Comm Fail”. Press ENT. “Yes” highlights.
5) Press ENT to select the operation. Press ENT again to confirm.
6) Return to the Main screen by repeatedly pressing ESC (escape).
Clearing a Rectifier Lost Alarm
If the ACU+ Controller resets while a rectifier communications fail alarm is active, the
rectifier communications fail alarm is replace with a rectifier lost alarm. To clear the
alarm, perform the following procedure.
Procedure
1) With the Main screen displayed, press ENT to go to the Main Menu. Navigate to
and select “Manual” (ENT).
2) If a password screen opens, a password must be entered to allow the User to
make adjustments. If a password was previously entered and has not yet timed
out, skip this step and proceed to step 3). Otherwise, to enter a password, with
the cursor at the User Name field (default is “Admin”), press the down arrow key
to move cursor down to the password line. Press ENT. “0” is highlighted. Press
the up arrow key once to change the “0” to”1” (default password is “1”), then
press ENT twice. (Note: If you have been assigned a unique User Name and
password, follow this procedure to enter these.)
3) With the Manual menu screen displayed, navigate to and select “Rectifier” (ENT)
/ “All Rect Ctrl” (ENT).
4) Navigate to “Clear Rect Lost”. Press ENT. “Clear” highlights.
5) Press ENT to select the operation. Press ENT again to confirm.
6) Return to the Main screen by repeatedly pressing ESC (escape).
Clearing a Converter Lost Alarm
If the ACU+ Controller resets while a converter communications fail alarm is active, the
converter communications fail alarm is replace with a converter lost alarm. To clear the
alarm, perform the following procedure.
Procedure
1) With the Main screen displayed, press ENT to go to the Main Menu. Navigate to
and select “Manual” (ENT).
2) If a password screen opens, a password must be entered to allow the User to
make adjustments. If a password was previously entered and has not yet timed
out, skip this step and proceed to step 3). Otherwise, to enter a password, with
the cursor at the User Name field (default is “Admin”), press the down arrow key
to move cursor down to the password line. Press ENT. “0” is highlighted. Press
the up arrow key once to change the “0” to”1” (default password is “1”), then