Status Indicating Leds (Mcsu-4); Operating The Mcsu-4; Password Security - Rectifier RT9- 24V Installation, Operation And Technical Manual

Installation, Operation and Technical Manual

6.1.3 Status Indicating LEDs (MCSU-4)

In addition to the alphanumeric display there are also three LEDs to indicate system status
as follows:
SYSTEM OK
SMR SHUTDOWN
When all three LEDs are off, the unit is off and there are a number of possible reasons for
this. For example:
 DC is not present
 Internal failure of MCSU-4
The amber LED indicates any alarm condition, either system or rectifier related.
The red LED indicates that one or more of the rectifiers in the system is shut down.

6.2 Operating the MCSU-4

6.2.1 Password security

MCSU-4 features password security for parameters setting. A password is an
alphanumerical code having minimum three and maximum eight characters
Units leave the factory without pre-programmed password and security function is not
active. To activate security a password must be programmed. Once that is done, security
can be enabled. Password programming procedure is described in paragraph 1.4.3
6.2.1.1 Entering a password to gain access to parameters change
When security function is active any changes to the system settings can be done only after
a valid password was entered. When ENTER key is pressed to change a parameter, the
display will show a message "Enter Password" on the top line and a blinking cursor on the
right hand side of the bottom line. Using INC and DEC keys scroll to the first character of
the password and press ENTER. The character will be substituted by a star ( * ) displayed
to the left of the cursor. Enter all characters of the password the same way. If the
password is less than eight characters long press ENTER again after last character. If the
entered password was correct the display will return to the selected parameter ready for
modification. If the entry was incorrect following will be displayed
There is no limit on password entry re-tries. To abort password entry any of the top row
buttons should be pressed. The display will return to the selected parameter.
There is no limit on number of parameters to be modified after a correct password entry
providing there was a break less than 1 minute between consecutive actions on the
keypad.
158-1872-01

Green LED
ALARM Amber LED
!
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Red LED
Wrong Password
Panel Locked
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Rectifier Technologies
19-Feb-14