Service manual

Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 28
14.5. Menu 4 – Historical Event Menu
MENU 4 is reached by selecting HISTORICAL DATA on MENU 1. All abnormal events are
stored on the EEPROM and viewed through this menu based on the time each event
occurred. The record display starts with the date and time stamp allowing the user or
maintenance personnel to trace back that occurrence. A maximum of 77 records can be
stored in one EEPROM. This can be increased to 154 records with the addition of a
second EEPROM. These records are hard coded onto the EEPROM and will not be
erased by cutting off the power supply or during a complete shutdown of the UPS, i.e. they
will be kept in the EEPROM forever until they’re overwritten by the 78
th
(or the 155
th
)
events.
The three most recent records are displayed at one time on the view screen. The
displayed records will move one record upward when the UP (↑) key is pressed, and move
one record downward when the DOWN (↓) key is pressed.
Below is a list of the abnormal conditions that are stored and can be displayed:
HIGH DC SHUTDOWN / SHORT CIRCUIT! / FUSE/OVERHEAT / OVERLOAD
SHUTDOWN / EMERGENCY STOP / INVERTER ABNORMAL / BYPASS ON
SHUTDOWN
The display in the top right corner of the screen is the UPS installation time displayed in
year/month. This information is provided to allow the user or the maintenance personnel to
have a reference point to schedule the next preventative maintenance visit.
To return to MENU 1 press the ENTER (↵) key.
D A T E T I M E E V E N T S > R U N : 2 1 Y R 0 3 M O
2 0 0 2 \ 0 3 \ 2 9 0 9 : 3 2
2 0 0 2 \ 1 1 \ 0 1 2 2 : 1 5
2 0 0 3 \ 0 3 \ 1 0 1 5 : 4 7
Figure 14.5.1
Historical Event Menu Dis
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