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34006452EN/AC - Page 28
5. Shutdown
5.1 Shutdown of a unit
Shutdown of an inverter
Single-unit UPS
Multi-bypass modular UPS:
Modular UPS with external maintenance bypass:
Frequency converter:
Parallel UPS with SSC:
– press the "inverter off" button on the control panel for 3 seconds;
– green "load protected" light goes off,
– red "load not protected" light on the control panel goes on,
– the inverter stops;
– if transfer to Mains 2 conditions are correct, the inverter shuts down and the load is transferred to Mains 2;
– if transfer to Mains 2 conditions are not correct, the inverter does not shut down;
– special action on the hidden control panel is required to force inverter shutdown,
– to force inverter shutdown, press simultaneously the security button and button 5 "Forced inverter shutdown" on
the hidden control panel,
– the load is transferred to Mains 2 with a 0.8 second interruption in the supply of power.
– the UPS shuts down (the other parallel-connected unit can supply the entire load):
green "load protected" light goes off,
red "load not protected" light on the control panel goes on.
The load is not affected and continues to be supplied by the other unit.
– all the UPSs shut down:
green "load protected" light goes off,
red "load not protected" light on the control panel of each unit goes on,
orange "operating problem" light on the other units goes on, all shut down due to the overload.
– if the system is redundant, i.e. the other parallel-connected inverters can supply the load on their own, the inverter shuts
down:
green "load protected" light goes off,
red "load not protected" light lights on the control panel of the line;
The load is not affected in that the other inverters continue to supply it normally;
if the system is not redundant, all the inverters shut down;
green "load protected" light goes off,
red "load not protected" light on the control panel of each line goes on,
orange "operating problem" light on the control panel of the other lines goes on, all shut down due to the overload.
– if the system is redundant, i.e. the other parallel-connected inverters can supply the load on their own, the inverter shuts
down:
green "load protected" light goes off,
red "load not protected" light lights on the control panel of the line.
The load is not affected in that the other inverters continue to supply it normally;
– if the system is not redundant and the transfer to Mains 2 conditions are correct, all the inverters shut down:
green "load protected" light goes off,
red "load not protected" light lights on the control panel of each line,
orange "operating problem" light "on the control panel of the other lines goes on (all shut down due to the overload),
the load is transferred to Mains 2 without an interruption in the supply of power;
– if the system is not redundant and the transfer to Mains 2 conditions are not correct, the inverter does not shut down:
special action on the hidden control panel is required to force inverter shutdown,
to force inverter shutdown, press simultaneously the security button and button 5 "Forced inverter shutdown" on
the hidden control panel,
the load is transferred to Mains 2 with a 0.8 second interruption in the supply of power.
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