APC DP300E Stop for complete power down, Switching off Silcon DP3240E DP3320E, Display shows

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 “OFF”-button.

TEST BEFORE TOUCHING!

WARNING:

Batteries out of service could be damaged if not recharged every third month.

WARNING:

3.Press the red “OFF“ push-button.

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 DC-capacitor may contain energy even after the UPS has been switched off. On account of the automatic discharging, wait at least 5 minutes after the UPS and MCCB’s have been switched off before working on the UPS system.

* 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.