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User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass 2.6 Operating the External Service Bypass Switch (parallel systems) 2.6.1 Bypassing the Parallel UPS System (All UPSs) Service bypass switch LoadMains APC Silcon UPS APC Silcon UPS CAUTION! Do not leave UPS out of service for more than 48 hours. Refer to section 2.3 Stop (for complete power down). User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass Action Steps 1-4 apply to all the parallel systems. Note that this will switch all systems into bypass operation Display shows 1. Press on the keyboard 2. Press or on the keyboard until 3. Press on the keyboard 4. Press on the keyboard All systems switch to bypass operation Bypass operation : NO Bypass operation Bypass operation : YES Do not switch off any of the UPS systems until steps 5-8 have been completed Lamp indication on Bypass Panel 5. Check light indication on the bypass panel Green light (H003) above the bypass switch handle (Q003) lights up 6. Set the external bypass switch (Q003) to position 1 Green light (H004) above the output switch handle (Q004) and green lights (H002) above the output switch handles (Q002) light up 7. Set the output switch (Q004) to position 0 H003 switches off H002 and H004 still on 8. Set all output switches (Q002) to position 0 H002 and H004 still on Display shows 9. Open the front door of any one system and press the green ON and the red OFF button simultaneously The acoustic alarm sounds for 30 secs* Repeat for (all) other system(s) 10. Set all input switches (Q001) to position 0 The red alarm LED below the display lights up and the acoustic alarm sounds for 30 secs* *Reset the acoustic alarm by pressing the key. **System OFF** User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass 2.6.2 Switching the Parallel System from External Bypass into Normal UPS Operation Service bypass switch LoadMains APC Silcon UPS APC Silcon UPS NOTICE! If battery has been disconnected, please refer to section 2.4.1 UPS start-up. User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass Action 1. Check that the output switch (Q004) is set to position 0 2. Check that all output switches (Q002) are set to position 1 3. Set input switches (Q001) to position 1 4. Wait 10 secs. Open the UPS front door and press the green ON button on all systems 5. Press on the keyboard 6. Press or on the keyboard until 7. Press on the keyboard 8. Press on the keyboard All systems switch to bypass operation Note! If Q002s are in position 0 off, only programmed systems will switch to bypass 9. Set the output switch (Q004) to position 1 10. Turn the bypass switch (Q003) to position 0 The following can be carried out on any UPS 11. Press on the keyboard 12. Press or on the keyboard until 13. Press on the keyboard 14. Press on the keyboard All the systems will transfer to normal operation Display shows Lamp indication on Bypass Panel H002 and H004 light up Green light (H003) above bypass switch lights up The green lamps (H002) and (H004) are switched off, but (H003) is lit until normal operation. Display shows No lamps on the bypass panel are lit User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass 2.7 Isolating one UPS in a Parallel Configuration for Service/Maintenance 2.7.1 Isolating one UPS in a Parallel/Redundant System Service bypass switch LoadMains APC Silcon UPS APC Silcon UPS In a redundant system one UPS may be isolated for service/maintenance without affecting other parallel UPS(s). Action 1. Check that the remaining UPS(s) will be able to carry the load when one UPS is isolated. 2. Switch off the system to be isolated for maintenence by pushing the green ON and the red OFF button simultaneously. 3. Disconnect output and mains by setting output switches (Q002) to position 0 and input switch (Q001) to position 0. Disconnect battery by opening battery breaker. 2.7.2 Switching Back the UPS to Normal Rarallel/Redundant Operation Action 1. Set the input switch (Q001) and the output switch (Q002) to position 1. 2. Charge capacitors, connect battery, and start up the UPS as described in 2.4.1. Start UPS (from complete power down). The UPS will automatically switch to normal operation and start load-sharing with the other parallelled UPS(s). WARNING! The system will discharge built-in capacitors. ALWAYS check with a multimeter that the terminals contain no dangerous voltage before touching the system! User Guide APC Silcon 120-160kW 400V UPS Stop/Start UPS and Operating the External Service Bypass NOTICE! With Q002 in position 0, the UPS can be operated and tested as a single system without affecting the other parallel UPS(s) if correct monitoring device has been installed. Applicable to all bypass panels. User Guide APC Silcon 120-160kW 400V UPS Operation 3.0 Operation The display unit will read par...