Procedure For Switching The Ups Into A Maintenance Bypass From Normal Operation; Procedure For Switching The Ups On From A Maintenance By-Pass Power Down Condition - Tescom T-300P/18 Series User Manual

4.2.2 Procedure For Switching The UPS Into a Maintenance Bypass From Normal Operation :

This procedure should be followed when turning from normal operation to maintenance bypass. This procedure
can be used for supplying temporary mains voltage to the system during the maintenance of the UPS or in case
of failure.
1.
Press on the UP or DOWN button when there is "COMMAND MENU" message on the front panel of the
UPS. Then press "ENTER" button.
2.
Press on the UP or DOWN button when there is "ENTER <BYPASS>" message on the front panel of the
UPS. Then press "ENTER" button for 3 seconds. L4 static by-pass led lit and L6 inverter led off.
Now your load is supplied by the Static By-pass.
NOTE : Using the procedure in 4.2.2.1 and 4.2.2.2 you can switch the load to by-pass manually.
(MANUAL BY-PASS)
3.
Take out the lock from the S3 (maintenance bypass) switch.
4.
Turn on (into "1" position) the S3 (maintenance bypass) switch.
5.
Turn off all the following switches into "0" position.
S0 (rectifier input)
S1 (inverter input)
S2 (static bypass)
S4 (UPS output)
S5 (Battery circuit breaker or battery fuse)
WARNING!!! Inside the UPS the following points will be on operation:
* By-pass AC input mains terminals
* Maintenance by-pass switch
* UPS output terminals
Now your load is completely supplied by the maintenance by-pass supply and the
UPS is not operating.
WARNING!!! During the maintenance or static by-pass the connected loads at the UPS output
can not being protected against the mains (by-pass source) failure.
4.2.3 Procedure For Switching The UPS ON From a Maintenance By-Pass Power Down
Condition :
1.
While the S3 switch in closed position"1" (ON) ;
turn on (into "1" position) the S2 (static bypass) and S4 UPS output) Switch.
2.
Turn on the S0 switch and note that the input CB is energized after about 5 seconds.
3.
After waiting for about 10 seconds. Turn on (into "1" position) the S1 (inverter input) switch.
4.
When "MAINT SWITCH ON!" message appears on the front panel, turn off (into "0" position)
the S3 (maintenance by-pass) switch. By this way the load will be fed from the static by-pass.
5.
See "STATUS NORMAL!" message on the front panel and the green inverter led lit.
6.
Turn on the battery circuit breaker into "1" (ON) position (or insert the battery fuse).
Now the UPS system is in normal operation. You can start-up your PC, printer etc.
4.2.4 Procedure For Switching The UPS From Manual By-Pass To Inverter (Normal Operation)
1.
Press on the UP or DOWN button when there is "COMMAND MENU" message on the front panel of the
UPS. Then press "ENTER" button.
2.
Press on the UP or DOWN button when there is "ENTER <INVERTER>" message on the front panel of the
UPS. Then press "ENTER" button for 3 seconds. L4 static bypass led off and L6 inverter led on. Now your
load is supplied by the inverter.
3.
See "STATUS NORMAL!" message on the front panel. Now the UPS system is on normal operation. You
can start-up your PC, printer etc.
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