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6. Maintenance Guide
6.1 Troubleshooting
If the UPS malfunctions during operation, please check that all lines are
connected properly and that the utility specifications are correct. Then check
the table below for solutions. Should the problem persist please contact your
local dealer for assistance.
Situation
Check Items
Solution
Fault
LED
Read the error code (see
next page) displayed by
the combination of LEDs,
and verify the fault as
follows.
1. Er05,Er39
1. Check for proper battery
connection. Measure battery
voltage to ensure that batteries
are charged and healthy.
Recharge batteries for 8 hours if
necessary. Simulate utility
outage to verify that UPS can
provide DC backup. Otherwise
consult your local dealer right
away.
2. Overload
2. Disconnect some non-critical
loads from the UPS output until
the overload ceases. Check if
there is any short circuit
between cables due to broken
cable insulation. Replace the
cables if necessary.
3. Er11 (UPS Over
Temperature)
3. Remove any objects obstructing
the ventilation. Verify that the
cooling fans are working
properly. Contact your local
dealer to replace the fans if
necessary.
4. Site wiring/Ground fault
4. Check if the “L” and “N” phases
of the utility AC source have
been wired incorrectly or if the
Ground-Neutral voltage is high.
5. Er14 (Fans out of
order)
5. Verify that the fans are
functioning properly. Do not
attempt to replace the fans
yourself. Contact your local
dealer for replacement.
