4: Operation
44
UPS471-02-00 PW9000DPA User Manual UK Dated 06/08/14
4.2.1 Starting the UPS system from the maintenance bypass
This procedure describes the sequence of operations necessary to power up the UPS module(s) whilst the load is
connected to the maintenance bypass supply, and then transfer the load to the UPS inverter(s) (‘On-Line’ mode).
Prior to powering-up the system, check and confirm the UPS system status:
• The load is supplied via the maintenance bypass switch (closed in all modules)
• The UPS module(s) are powered down
Powering up the UPS module(s):
In a multi-module system perform each of the steps in turn on every module.
1. On the UPS power module close the bypass line fuse holder F2 if open.
2. Close the battery fuses/breaker (in external battery cabinet if fitted).
a) The UPS mimic panel
LINE 1
LED will be permanent green.
b) The
BATTERY
LED will be flashing green.
c) The LCD display will indicate
LOAD OFF, SUPPLY FAILURE
.
3. Close the parallel isolator switch (IA2) and check that the
PARALLEL SW CLOSED
message is shown on the LCD
display.
4. On the UPS mimic panel press and release both
ON/OFF
buttons simultaneously and wait approximately 60 seconds.
a) The UPS module will begin to power up.
b) Initially
LINE 2
LED will be red, then change to green.
c) At this stage the LCD display will indicate
LOAD NOT PROTECTED
and the module mimic LED indications should
be as follows:
5. When powering up a multi-module system ensure that ALL the modules are in the state shown above before
continuing with this procedure.
WARNING:
All the operations in this section must be performed by authorised and trained personnel.
LED
Colour
LINE 1
Green
LINE 2
Off
BY PASS
Off
INVERTER
Off
BATTERY
Green Flashing
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD
LED
Colour
LINE 1
Green
LINE 2
Green
BY PASS
Green
INVERTER
RED
BATTERY
Green
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD