57
KEOR S 3-10 kVA
Oper
ating & I
nstalla
tion M
anual
11. Troubleshooting
When the UPS malfunctions during operation, you may check the followings:
• Are the wirings of input and output correct?
• If the input voltage of the Utility is within the input window of the UPS?
In case problems or symptoms still exist, please proceed the followings for proper adjustment. Should the
problem persists, please contact the LEGRAND Technical Assistance Centre.
KEOR S 3KVA
Situation
Check Items
Solution
UPS Fault LED
Read the error code (see Ap-
pendix-1 Error List for error
readings) displayed by the
combinations of the LEDs and
verify the fault as follow:
Check the error code shown on the LCD screen
1.Er05, Er25,
Check to see if the battery connection is properly done,
then re-charge the batteries for 8 hours to see whether
the UPS may backup normally; otherwise, consult your
local distributor right away.
2. Er12
Disconnect some non critical loads form the UPS output
until overload ceases. Check if there is any short circuit
between cables due to broken cable insulator. Replace
the cables in necessary.
3. Er11
Remove any objects obstructing the ventilation louvers.
Verify if the cooling fans are working properly. Contacts
your local dealer to replace the fans if necessary.
4. Er14
Verify if the ventilating fans are functioning properly.
Do not attempt to replace the fans by yourself. Contact
your local dealer for replacement.
5.
Verify if the “L” & “N” phase of the Utility AC source has
been wrongly wired or if the Ground-Neutral Voltage
exceeded the limits.
6. Other error
code.
Consult your local dealer for assistance.
UPS fails to provide battery
backup or its back up time is
shorter than its intended per-
formance
If the backup time remains non-satisfactory after 8 hours of charging,
please contact your local dealer for battery replacement.
IF UPS is locked itself
Please check the further section to solve the problem. If problem per-
sist, consult your local dealer for technical assistance.0
UPS is normal but no Output
to load
Check if all power codes are properly connected. If problem persist, con-
sult your local dealer for technical assistance.
Strange noise and smell
Immediately shut down the whole System. Disconnect the power from
the UPS and call the LEGRAND Technical Assistance Centre.
UPS is unable to provide back-
up power source
Check that the battery connectors are fully engaged. Allow the battery
to recharge if the batter is weak. If problem persist after recharging, re-
place the battery. If problem persist, consult your local dealer for techni-
cal assistance.
Table 13
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