Stop, Start & Operating the External Service Bypass Panel
2.4Stop (for complete power down)
2.4.1Switching off Silcon DP3400E – DP3500E
WARNING:
If the UPS system has a service bypass panel, and if load equipment must remain ernergized from the utility, refer to operation service bypass before proceeding.
WARNING:
This UPS system contains a special design feature, which guarantees output voltage in the form of bypass operation. This function comes into operation in case of failure in internal power supply or in controller circuit.
1.Prepare the system by opening the front door(s).
2.Continue with the next point (3) and observe that this next step will interrupt the system output voltage!!!
Display shows
Even if the UPS system is assumed to be switched off, there may be voltage at the UPS output because of the special bypass feature. Switching off by pressing the red
TEST BEFORE TOUCHING!
WARNING:
Batteries out of service could be damaged if not recharged every third month.
WARNING:
3.Press the red “OFF“
The red alarm LED below the display lights. The acoustic alarm sounds for 30 sec.*
4.Switch off the utility power supply.
The red alarm LED below the display lights. The acoustic alarm sounds for 30 sec.
5.Switch off battery MCCB’s in MCCB box or battery cubicle.
Please refer to LED indication and labelling in MCCB box or battery cubicle.
6.Switch off utility power by opening Q001 and Q010, if dual utility.
7.The acoustic alarm sounds shortly.
** System OFF **
** System OFF **
Blank
Internal
* The acoustic alarm can be reset by the 
key.
The UPS is now isolated. Maintenance/repair work can take place or the UPS can be disconnected and removed.
7OA0004 US rev. 02
6 | User Guide Silcon DP300E Series 480V |
