19 – Start-Up, Shutdown and Bypass (continued)
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2 | Warning: The UPS system shutdown procedure will eliminate the AC power output for all loads. Before shutdown, confirm that all loads |
are turned off or place the UPS systems in manual bypass mode to keep loads powered by the bypass (reserve) power source. |
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•1 For the UPS system you wish to shut down, press the OFF button
Afor 3 seconds (until you hear a beep), then release the button. If the other UPS system can support the connected equipment loads alone, the UPS system that was turned off will shut down its inverter and its LCD screen will read “LOAD NOT POWERED”. The other UPS system’s LCD screen will read “ONLINE MODE”. If the total connected equipment load is too large to be handled by a single UPS system, both UPS systems will shut down their inverters and switch to bypass mode, and their LCD screens will read “ON AUTO BYPASS”.
•2 For the UPS system you wish to shut down, switch off the main input circuit breaker switch Q1 , then switch off the output circuit breaker switch Q4 .
•3 For the UPS system you wish to shut down, switch off the bypass input circuit breaker switch Q2 .
•4 When the UPS system is completely shut down, the LCD screen will be completely off. If the UPS systems have external battery cabinets connected, switch off the external battery cabinet circuit breaker switch A of each battery pack. On the SU20KX or SU40KX, turn OFF the battery breaker on the back of the UPS.
Note: If the UPS system remains off for an extended period of time, it should be turned on periodically to allow the batteries to recharge. The UPS system should be turned on and the batteries should be recharged at least one uninterrupted
to recharge the batteries periodically may cause irreversible battery damage.
1 | A |
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Q4 |
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| Q1 |
Output | Manual | Bypass | Main |
2 | Bypass | Input | Input |
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Q2
Output | Manual | Bypass | Main |
3 | Bypass | Input | Input |
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| A |
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4 |
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