inform DSP FLEXIPOWER SERIES, User Manual

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7.6. Manual (Maintenance) Bypass Instructions and Decommissioning
Manual bypass enables the user to isolate the electronic circuitry of the UPS from the mains and
the load without interrupting the load operation by connecting the loads directly to the bypass
supply.
In order to transfer to Manual Bypass without interruption, do the following instruction
respectively;

Press Off key pad for about 5 seconds, the Inverter output will be turned off, then the
output load is supplied by Bypass loop and “OFF” would be written on LCD screen (as drawing
B).

Remove the cover of Manual Bypass circuit breaker.

Switch the manual bypass circuit breaker (F4) to “ON” position.

See drawing on LCD. It means UPS operates on Manual Bypass Mode.

Switch the output circuit braker (F2), the input circuit breaker (F1) and the breakers on external
battery cabinets if any- to “0” position.
The loads will be continued to be supplied directly from the mains.
In order to transfer the loads from Manual Bypass to UPS without interruption, do the following
instruction respectively;

Switch the output circuit braker (F2), the input circuit breaker (F1) and the breakers on external
battery cabinets if any- to “I” position.

Switch the manual bypass circuit breaker (F4) to “OFF” position.

Make sure UPS operates on Bypass Mode (as drawing B).

Press the UPS On Switch for approx. 5 seconds. If there is no problem after the self-test UPS
starts to operates on Online Operation (norl).

Replace the cover of Manual Bypass circuit breaker.
This feature is useful while performing maintenance or service and shall only be executed by
authorized technical service personnel.
During Manual Bypass operation; in case of any mains interruption, all loads on the output
will be deenergized. Manual Bypass Operation should not be preferred for long time use.