COVER serii NHS – User Manual
COMEX S.A.
29
5.1.1. LED indicators
The LED energy flow diagram shows the current operating status of the power supply, the energy flow in
the power supply and the status of individual UPS components. A detailed description of the individual
LEDs below.
Table 5-1 Description of the meaning of individual LED diode states
Indicator
State
Description
Rec diode
Green
OK rectifier in all modules
Green flashing
Rectifier at least one module ok, power supply in the standard
Red
Damage to the rectifier
Red flashing
Supplying at least one module outside the standard
Turn off
The rectifier is off
Battery diode
Green
Battery charging
Green flashing
Discharging the battery
Red
Incorrect battery condition (battery damage, no batteries connected or reverse
polarity) or DC / DC converter (damage, overload or overheating), EOD (battery
cut-off voltage).
Red flashing
Low battery voltage
Turn off
Batteries and converter OK, batteries are not charged
Bypass diode
Green
Load powered from the Bypass track.
Red
Bypass supply outside the standard or damage to the static switch.
Red flashing
Bypass voltage incorrect
Turn off
Bypass OK
Inverter diode
Green
Load powered from the inverter
Green flashing
Switching on the inverter, switching on UPS, synchronizing at least one power
module
Red
The loads are not supplied from the inverter, at least one inverter module is
faulty
Red flashing
Load powered from the inverter, at least one inverter module damaged
Turn off
Inverter turned off in all modules
Load diode
Green
The UPS output is on and working properly
Red
Long overload of the UPS, short-circuit at the output or lack of power supply at
the output.
Red flashing
Output overload
Turn off
No power at the output
State diode
Green
Normal work
Red
Fault
5.1.2. Audible alarm
There are two types of acoustic signaling in the UPS. Both are described in the table below.
Alarm
Description
Two short alarms and one long one
Appears at the moment of events such as lack of power supply.
Continuous alarm
Appears at the moment of power supply failure, eg damage to the fuse or
other component.