Powerware Uninterruptible Power Supply SOLA 4000 - Manual (Page 69)

SOLA 4000 - Operation
JUE 401266 69
5.2 Switching Off the UPS System / to Main-
tenance Bypass
Initial UPS Operating Mode:
The UPS is in any operating mode described in the previous
sections "Operating Modes" (except maintenance bypass opera-
tion). All power switches except IBY are closed, and the load is fed
either through the inverter or the static bypass.
Operating Steps:
A: • Make sure that the LEDs 14 and 26 "Bypass Power Supply
O.K." and "Bypass available" are illuminated and not flashing.
CPHC16-S: • Press the pushbutton on the CPHC16 -S pcb to commutate to
the bypass supply.
The UPS or all UPS modules (Hot-standby, parallel) switch to
"Bypass Operation" mode. The yellow LED 18 lights up.
IBY • After LED 18 is illuminated, close the IBY switch.
The load is now supplied by the static bypass and the maintenance
bypass in parallel. If more than one IBY switch is present, close all
switches.
B: IUG: • Open the IUG switch.
IB: • Open the battery switch IB.
IRE: • Open the IRE switch.
IRP: • Open the IRP switch.
After opening the IRP switch the display is only powered by the DC
capacitors and will fade out within a few minutes.
C: • Repeat the steps in B for all units present.
Note: If the optional SOLA external maintenance bypass switch
(MB3/2 - version 2) is installed, it is not necessary to perform
step B if the switch is switched directly to position 3 "UPS
ISOLATED" in step A
.
5 Operating Instructions