2
5
TROUBLESHOOTING
The information below indicates various symptoms a user may encounter
in the event the S4K
2U
UPS develops a problem. Use this
information to determine whether external factors caused the problem
and how to remedy the situation.
1.
The Fault indicator will illuminate, indicating the UPS detected a
problem.
2.
An alarm will sound, alerting that the UPS requires attention.
3.
One or more additional load/battery level LED indicators will be
illuminated to provide a diagnostic aid to the operator, as described below:
LED status Diagnosis/Audible alarm
All LEDs
On bypass due to output overload; beep ever half-second
A LED
On bypass due to overtemperature condition; beep every 4 sec.
B LED
On bypass due to DC bus overvoltage; beep every 4 sec.
C LED
On bypass due to control power supply failure; beep every 4 sec.
D LED
On bypass due to PFC failure; beep every 4 sec.
E LED
On bypass due to inverter failure; beep every 4 sec.
A&C LEDs
UPS failed battery test; long beep every minute
C&E LEDs
UPS shutdown due to command from communication port
(SNMP); no beep
Battery
LED Flashing
Internal Battery source not available (continuous horn). Check
battery connection, completely power down and reboot UPS.
AC LED
Flashing
Line to neutral reversal in the AC input power supply or a loss of
proper grounding; continuous horn and UPS will not start.
Bypass LED
Flashing
Utility power voltage or frequency is out of tolerance; bypass is
unavailable.
This example shows UPS on bypass
due to output overload.
LOAD/BATTERY
LEVEL INDICATORS
Fault
E
D
C
B
A
Fault
E
D
C
B
A
Summary of Contents for S4K2U Series
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