Njoy Helios PRO Series User Manual page 18

5.8 Warning indicator
Warning Icon
(flashing)
Low Battery
Overload
Battery is not
connected
Over Charge
Site wiring fault
EPO enable
Over
temperature
Charger failure
Battery Fault
Bypass Out Range
Bypass Frequency
Unstable
EEPROM error
Fan failure
Battery
replacement
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Code Alarm
Sounding every 2
bL
seconds
Sounding every
OL
second
Sounding every 2
NC
seconds
Sounding every 2
OC
seconds
Sounding every 2
SF
seconds
Sounding every 2
EP
seconds
Sounding every 2
seconds
Sounding every 2
CH
seconds
Sounding every 2
bb
seconds
Sounding every 2
seconds
Sounding every 2
FU
seconds
Sounding every 2
EE
seconds
Sounding every 2
FA
seconds
Sounding every 2
seconds
6 Replacing the battery
NOTE:
This UPS is equipped with internal batteries. When
your battery lifetime is over you can replace them without
shutting down the UPS or connected loads thanks to the hot-
swappable battery design. Replacement is a safe procedure,
isolated from electrical hazards.
CAUTION
Consider all warnings, cautions, and notes before
replacing the batteries.
NOTE:
During the time of battery disconnection, equipment
is not protected from power outages.
Step 1. Remove front
panel.
Step 2. Disconnect
battery wires.
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