ABB DPA UPScale ST40, User Manual

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Modifications reserved
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7.4.3 In capacity multi-module system
WARNING!
THE WEIGHT OF A UPS MODULE CAN REACH 22KG, THEREFORE IT IS
RECOMMENDED TO BE LIFTED BY 2 PERSONS. THE MODULE SHOULD
NEVER BE CARRIED BY ONE PERSON ONLY
7.4.3.1 How to extract a module in a capacity multi-module system
If a UPS module experiences a fault in a capacity parallel system and there is not enough capacity in
the remaining operating UPS modules to protect the load then the load will automatically be
transferred to bypass (bypass mode or ECO-mode) and will continue to be supplied by the mains
power supply.
To extract the faulty module from the UPS frame in a capacity multi-module system, proceed as
follows:
1. Identify the faulty module with the alarm condition and reset the alarm. The audible noise will
stop. If the alarm condition persists (the LED indicator alarm is RED) there is a fault in the UPS
module.
2. Verify that the load is on bypass and is supplied by the mains power (bypass mode or ECO-
mode) on all UPS modules; in the majority of the events the LED indicators on the control
panel of the faulty module will show:
LED Indicator Color
LINE 1 Green
LINE 2 Green
BYPASS Green
INVERTER RED
BATTERY Green
3. Whereas the LED-indicators on the control panels of the other operating modules will show:
LED Indicator Color
LINE 1 Green
LINE 2 Green
BYPASS Green
INVERTER OFF
BATTERY Green
4. Close maintenance bypass switch IA1 (position ON)
5. On LCD: “MANUAL BYP IS CLOSED” will appear and the LED indicator will indicate as shown
below:
LED Indicator Color
LINE 1 Green
LINE 2 Green
BYPASS Green
INVERTER RED
BATTERY Green
THE LOAD IS NOW DIRECTLY SUPPLIED BY MAINS AND IS NOT PROTECTED