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Symptom
Possible cause
Remedy
The icon
and warning code
flash on LCD display and alarm beeps
every second.
Loose parallel communication
cable or incorrect parallel
operation.
For parallel system, make sure
parallel communication cable is
connected tightly and also
check if the PRA ID number is
right after turning on input
breakers one by one. If all the
number displays are correct,
it’s ok to turn on UPSs after
disabling the warning message
by pressing ‘UP’ and ‘DOWN’
button together. Otherwise,
please do NOT turn on UPSs
and contact your dealer for
help.
For single UPS, since there is
no communication cable and
parallel output cable
connection, simply ignore this
warning message by pressing
‘UP’ and ‘DOWN’ button to
disable and turning on UPS for
continuous operation.
5. Storage and Maintenance
5-1. Storage
Before storing, charge the UPS at least 7 hours. Store the UPS covered and upright in a cool, dry
location. During storage, recharge the battery in accordance with the following table:
Storage Temperature
Recharge Frequency
Charging Duration
-25°C - 40°C
Every 3 months
1-2 hours
40°C - 45°C
Every 2 months
1-2 hours
5-2. Maintenance
The UPS system operates with hazardous voltages. Repairs may be carried out only by qualified
maintenance personnel.
Even after the unit is disconnected from the mains, components inside the UPS system are still
connected to the battery packs which are potentially dangerous.
Before carrying out any kind of service and/or maintenance, disconnect the batteries and verify that
no current is present and no hazardous voltage exists in the terminals of high capability capacitor such as
BUS-capacitors.
Only persons are adequately familiar with batteries and with the required precautionary measures
