Service manual
Always On UPS Systems
M0704_NX_Series_Service_Manual V2.17 2012-06-12 26
14.3. Menu 2 – Status Warning Menu
The Status/Warning menu is accessed through MENU 1 by selecting STATUS WARNING
FAULT. The left-hand side of this menu shows the real time status of the rectifier, inverter
and static switch, while the right hand side shows the warning or fault condition if any.
Under normal condition, the LCD display should be exactly the same as the figure shown
above. When abnormal conditions occur it will be shown under the title < WARNING >, but
this will be overridden by a “fault” message if more serious abnormal conditions occur and
the title < WARNING > will then change to < FAULT >.
For example, if a short circuit has occurred, this screen will display as follows:
The inverter will automatically shut off under a short circuit fault. The CPU is designed to
detect short circuits and in order to avoid unnecessary tripping of the reserve (utility
supply) breaker, the static switch will remain open or inactive. (There will be no output
power present)
Listed below are all the warning conditions that can be displayed (they are arranged in
order of priority, starting with the highest priority):
1
st
row: BYPASS ON – Output is being supplied by the reserve
RECT AC FAIL – AC utility source failure
RECTIFIER PHASE ERROR – AC utility phase loss or one phase out of
operating parameters
RESERVE FREQ. ERROR – AC utility frequency is out of parameters and
reserve has been disabled until error is corrected
2
nd
row: 170% OVERLOAD – over 170% maximum capacity for the UPS system.
150% OVERLOAD – over 150% maximum capacity for the UPS system.
125% OVERLOAD – over 125% maximum capacity for the UPS system.
110% OVERLOAD – over 110% maximum capacity for the UPS system.
3
rd
row: BATTERY LOW STOP – Battery have been exhausted.
BATTERY LOW – Batteries have passed the low voltage level and will soon be
exhausted.
BATTERY BAD – One or more cells have tested faulty.
BATTERY GND FAULT – Battery cabinet not grounded properly.
BATTERY TESTING – performing test on the batteries.
STATUS WARNI NG
RECT I F I ER= ON
I NVERTER=ON
LOAD ON I NVERTER
STATUS FAULT
RECT I F I ER= ON SHORT CI RCUI T
I NVERTER=OFF
LOAD ON I NVERTER
Figure 14.3.1
Status Warnin
g
Menu Dis
p
la
y
Figure 14.3.2
Warnin
g
Status Dis
p
la
y
with Fault Condition