S4K2UC SERIES USER MANUAL | 41
Table 10: Troubleshooting
Problem Cause Solution
Fault and Bypass indicators and all LED
segments of the Battery Level indicator are
illuminated
UPS is overloaded or the load is faulty
Check the Load Level indicator and remove
non-essential loads. Recalculate the load and
reduce the number of loads connected to the
UPS. Check the load for faults.
Fault and Bypass indicators and Diagnostic A
indicator are illuminated
UPS shutdown due to overtemperature condition
Load is on bypass power
Ensure the UPS is not overloaded, ventila-
tion holes are not blocked, or room ambient
temperature is not excessive. Wait 30 minutes
to allow the UPS to cool, then restart the UPS.
If the UPS cannot restart, contact your local
dealer, SolaHD representative or SolaHD Tech-
nical Support for assistance.
Fault and Bypass indicators and Diagnostic B
indicator are illuminated
UPS internal DC bus overvoltage
UPS requires service. Contact your local dealer,
SolaHD representative or SolaHD Technical
Support for assistance.
Fault and Bypass indicators and Diagnostic C
indicator are illuminated
UPS DC-DC fault
UPS requires service. Contact your local dealer,
SolaHD representative or SolaHD Technical
Support for assistance.
Fault indicator and Diagnostic D indicator are
illuminated
UPS PFC (Power Factor Correction Circuit) fault
UPS requires service. Contact your local dealer,
SolaHD representative or SolaHD Technical
Support for assistance.
Fault and Bypass indicators and Diagnostic E
indicator are illuminated
UPS inverter fault
UPS requires service. Contact your local dealer,
SolaHD representative or SolaHD Technical
Support for assistance.
Fault indicator and Diagnostic A and C indica-
tors are illuminated
UPS failed the battery test
Replace the batteries. Contact your local dealer,
SolaHD representative or SolaHD Technical
Support for replacement battery packs.
Fault and Bypass indicators and Diagnostic C
and E indicator are illuminated
UPS shut down by a command from the
communication port(s)
UPS has received a signal or command from
the attached computer. If this was inadvertent,
ensure the communication cable is correct for
your system. For assistance, contact SolaHD
Technical Support.
Fault indicator and Diagnostic A and B indica-
tors are illuminated; continuous alarm sounds
UPS failure (includes dual-fan failure, single-fan
failure under certain conditions, and battery
charger failure)
Ensure fan is not blocked up. If the fault is not
resolved, contact SolaHD Technical Support for
assistance.
AC Input indicator is ashing
UPS detected a line-to-neutral reversal or a loss
of proper grounding for the UPS. A continuous
alarm will sound; the UPS cannot start up in
standby status. This is active only when power
is rst applied to the input. Once the UPS is
running, the AC Input indicator will ash, unless
the input wiring is correctly changed.
Contact a qualied electrician to verify site
wiring.
Battery indicator is ashing; continuous alarm
sounds
Battery source is not available
Check battery connections, completely power
down and restart the UPS.
NOTE: If the battery circuit opens while the UPS
is running, it will be detected when the next
battery test is performed.
Bypass indicator is ashing
The bypass is disabled because the voltage or
frequency is outside the acceptable limits
The AC input powers the PFC input and serves
as the bypass source. If the AC is present but
the voltage or frequency exceeds the accept-
able range for safe operation with a load, the
bypass will be disabled and this indicator will
ash, indicating that the bypass is unavailable.
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