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13.4 First Line Maintenance
13.4.1 Replacing the Alpha FXM UPS unit
The following Steps can be carried out to replace a faulty Alpha FXM unit while still
supplying Mains Power to the Traffic Control Equipment. If it's not necessary to keep the
Traffic Control Equipment Energised, please follow section 13.3 to fully isolate the UPS
Solution before following steps 7 onwards below. See section 10 for isolation switch
information.
THESE INSTRUCTIONS NEED TO BE FOLLOWED CAREFULLY. FAILURE
TO DO SO MAY RESULT IN ELECTRIC SHOCK.
1. Switch the UATS to BYPASS (the Junction will now only run from the Mains
Supply)
2. Switch all Breakers on the Battery Shelves (Battery Housing Assemblies) in both
cabinets (UPS and Battery Expansion Cabinets) to the OFF position
3. Switch the Battery Breaker on the Front left of the Alpha FXM UPS unit to the
OFF position
4. Switch the UPS Supply Breaker (CB1) on the front of the UATS to the OFF
position
5. Switch OFF the Input Circuit Breaker on the front right of the FXM unit
6. Unplug the 48V Battery Connector from the front (left) of the FXM unit to
disconnect the battery circuits completely.
7. Remove the covers from the Mains Input and output cables on the front right of
the FXM unit
8. Using a Multi Meter set to AC (check it's working using the mains supply in
the UPS Connection Panel), check that both the input and output cable
looms are no longer energised.
9. Remove both Input and output cable looms labelling them so you know where
they came from. Use Insulation tape to cover the ends of the cables
10. Unplug the alarm cable looms C1 – C6 and the Battery Temperature Sensor
11. The FXM Unit can now be removed from the 19" Rack.
12. Install the Replacement FXM unit, Switching OFF the Input Circuit Breaker AND
the Battery Circuit Breaker.
13. Plug alarm cable looms C1 – C6 into the FXM unit
14. Reconnect the Input and Output Mains Looms onto the FXM Unit, Replace the
Covers.
15. Plug the Battery Temperature Sensor into the FXM unit
16. Plug The 48V Battery Connector into the FXM unit
17. Switch all Breakers on the Battery Shelves (Battery Housing Assemblies) in both
cabinets (UPS and Battery Expansion Cabinets) to the ON position
18. Switch ON the Input Circuit Breaker on the front right of the FXM unit
19. Switch ON the Battery Breaker on the front left of the FXM unit
20. Switch the UPS Supply Breaker (CB1) on the front of the UATS to the ON
position
21. Switch the UATS to UPS
22. Check the UPS goes into LINE mode and check the alarms.
Version
7
Last Editor
Ore Oluwatudimu
Document
UPS Solution General Handbook
Name
Copyright ã Siemens plc 2017 All Rights Reserved
Infrastructure and Mobility, Traffic Solutions
Page 60 of 76
Status
TS008468
Date
Doc. No.
Sopers Lane, Poole, Dorset
BH17 7ER
ISSUED
31/01/2017
667/HB/47750/000
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