Tescom T-300P Series, User Manual

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4.2.5 Procedure For Completely Powering Down The UPS :
TURNING OFF THE UPS
All the power switches, isolators and circuit breakers should be turned off, with the following sequence.
(Turn off into “
0 ” (OFF) position). There will be no voltage on the load.
WARNING!!!
This procedure will cut the energy of all the equipments,
which are connected to UPS output.
S4 (UPS output)
S2
(static by-pass)
S1 (rectifier input)
S5 (Battery circuit breaker or battery fuse)
4.2.6 When Utility Power Is Interrupted
When there is a utility power interruption, the L6 inverter led continuously lit also L3 battery and on the LCD “A10
LINE FAILURE”
message appears. And also an audible alarm sounds. Your UPS continues to convert the battery
voltage to AC voltage and protect against loss of data and failure. The autonomy can be increased by
disconnecting relatively unimportant loads. But do not connect this load again during the autonomy. When the utility
power is restored the UPS will return to normal operation and on the front panel of the UPS
“A45 MAINS OK”
mesage appears.
When there is a “ A7 BATTERY LOW ” message appears and audible alarm sounds shut down your PC. Otherwise,
all the batteries will be discharged in a few minutes.
After you shut down the critical load (computer system). Apply the completely powering down the UPS procedure.
Apply the normal operation procedure to start up the UPS again after a long time later.
NOTE: Do not forget to turn on the battery circuit breaker into “1” (ON) position when there is a mains voltage
return. If not, in case of a second power cut there will be no voltage for the critical load.
If you have a reserve generator, you can use it to feed the UPS’s input and the batteries starts to
charge. By using UPS and the generator at the same time ensures to charge the batteries faster.
4.3 OPERATING INSTRUCTIONS FOR PARALLEL CONNECTED UPS’s
4.3.1 Procedure For Switching The UPS To Power The Load From a Power-Off Condition :
With all the switches and fuses (S1,S2, S3, S4 and S5) in “OFF” “0” position and with S6 in “NORMAL”
position.
Turn on the parallel connected UPS’s, UPS1 and UPS2 separately as follows:
1. Make sure that the two UPS’s are properly connected for parallel operation in accordance with the
diagrams given in “INSTALLATION PROCEDURES” section. (Section V.)
2. Turn on the S1 switch (rectifier input) into “1” position. By turning on S1 you will see the following
messages on the LCD panel,
a. “RECTIFIER START”
b. “INVERTER START”
c. “STATUS NORMAL”
After these messages the UPS will start running and the green INVERTER LED on the front panel will
be turned on.