7.5 kVA - 15 kVA UPS
Parallel for redundancy System
User’s and Installation Manual
1012833
Revision 4
24
LOAD The four LEDs show the load of a single UPS.
One green LED: Output is on.
Two green LEDS: The load is more
than 40% of the nominal.
Three green LEDS: The load is more
than 60% of the nominal.
When the third (60) green LED is blinking
the UPS load is more than 50 % and
the parallel for redundancy system is not
redundant anymore.
Four green LEDS: The load is
more than 80% of the nominal.
When the third (60) and fourth (80) green LEDs
are blinking the UPS load is more
than 80 % and the parallel for redundancy
system is not redundant anymore.
OVERLOAD UPS is overloaded.
OVERTEMP UPS is overheated.
SERVICE Service of the UPS is needed.
ALARM The audible alarm is activated.
Line failure, battery low, UPS by-passed,
overload, overtemperature, service
or UPS alarm.
Operating switches
MAIN POWER SWITCH Starts and stops the UPS.
RESET Resets the alarms and shuts down
the audible alarm.
Normally the warnings given by the control panel do not mean that the output power is
affected. Instead they are preventive warnings intended to alert the user.
8.4 Using the maintenance bypass switch of the
parallel module
This switch is used to bypass the parallel system during maintenance or servicing.
Maintenance bypass switch is located on the front panel of the parallel module.
The maintenance bypass switch has the following positions:
UPS normal position, the load is supplied from the UPS(es)
BYPASS the UPSes are bypassed and the load is supplied from the input power line.
NOTE!
This switch is used only on rare occasions. Using the switch does not cause any break in
the output voltage, if the input voltage and frequency are accepted and the system is
synchronised to the input mains.
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