C400 User Manual
Page 22
bUSL
Bus low
UPS internal fault
Contact your CertaUPS representative.
bSFT
Bus soft start fail
UPS internal fault
Contact your CertaUPS representative.
bUSS
Bus short
UPS internal fault
Contact your CertaUPS representative.
TEPH
Inverter temperature high
The inside temperature of the UPS
is too high
Check the ventilation of the UPS, check
the ambient temperature.
ITPH
Inner Ambient temperature high
The ambient temperature is too
high
Check the environment ventilation.
INVH
Inverter high
UPS internal fault
Contact your CertaUPS representative.
INVL
Inverter low
UPS internal fault
Contact your CertaUPS representative.
ISFT
Inverter soft start fail
UPS internal fault
Contact your CertaUPS representative.
NTCO
Inverter NTC open
UPS internal fault
Contact your CertaUPS representative.
SHOR
Inverter short
Output short circuit
Remove all the loads. Turn off the UPS.
Check whether the output of UPS and
loads for short circuits. Make sure the short
circuit is removed, and the UPS has no
internal faults before turning on again.
OVTP
Over-temperature fault
Over-temperature
Check the ventilation of the UPS, check
the ambient temperature and ventilation.
OVLD
Overload
Overload
Check the loads and remove some non-
critical loads. Check whether some loads
are failed.
SITE
Site fail
Phase and neutral conductor at
the input of UPS system are
reversed
Rotate mains power socket by 180° or
connect the UPS system.
EPO
EPO active
EPO function is enabled
Plug into the EPO switch.
*Charger model only
Check the alarm condition and perform the applicable action to resolve the condition.
If an alarm status changes the alarm will need to be silenced again.
