UPS471-02-00 PW9000DPA User Manual UK Dated 06/08/14
49
4: Operation
4.2.4 Complete system shutdown
The UPS system may be shutdown completely if the load does not require power for an extended period of time. Use this
procedure to turn off the load power and shutdown the entire UPS system.
1. Isolate all load equipment connected to the output of the UPS system by opening the fused isolators or circuit
breakers in the load distribution board.
2. Verify that the loads are powered down. Then carry out the following actions on every module in a multi-module
system.
3. On the UPS control panel simultaneously press both
ON/OFF
buttons.
a) The LCD panel will indicate:
LOAD OFF, SUPPLY FAILURE
.
4. Open the fused battery isolator(s) associated with the module.
5. Open the module’s parallel isolator switch (IA2).
6. Open the module’s bypass line fuse holder F2.
7. Isolate the UPS input/bypass supplies at the input distribution board.
8. The UPS is now voltage free.
WARNING:
All the operations in this section must be performed by authorised and trained personnel.
CAUTION: This procedure will totally disconnect load power. Ensure that it is safe to lose power to all the
loads connected to the UPS system before you begin this process.
WARNING:
Perform the following steps only after the load has been fully isolated.
WARNING:
Allow 2 minutes for the internal DC capacitors to discharge before touching the UPS internal
components.
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD
LED
Colour
LINE 1
Green
LINE 2
Off
BY PASS
Off
INVERTER
Off
BATTERY
Green Flashing