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batteries you will find a 2nd battery switch used for measuring the battery voltage
inside the top of the unit (3-pole circuit breaker.) To switch equipment power off
completely you will also need to open this switch. Beware of possible residual
charge in the capacitors inside the equipment and wait for 5 minutes so that they
can discharge.
Procedure for passing from normal operation to maintenance bypass:
• Shut down the inverter. Through the keypad of the control panel ((3) from
Fig.25), go down to “CNTL” submenu (screen 1.0), and select “OFF”.
You will get to
screen 1.2, asking you to shut down the unit by pressing (ENT),
see Fig.24.
• Remove the screws that attach the mechanical block (BL).
• Remove the mechanical block (BL) of the manual bypass switch (Q5) and set it
to “On” position.
• Set the output switch (Q2) to “Off” position.
• Set the Battery Fuse Holder or battery switch (Q3) to “Off”. In models with
inde pendent battery pack/s also turn Battery Fuse Holder (Q8) of each pack
to “Off”.
• Set the input switch (Q1a) to “Off” position.
The UPS is supplying output voltage directly from the mains through the manual
bypass. The UPS is completely shut down and inactive.
5.4.3. TRANSFER TO NORMAL OPERATION
Procedure for switching from maintenance bypass to normal operation:
• In model with an external battery cabinet, set fuse holder switch from battery
cabinet (Q8) to “On” position.
• Set the input switch (Q1a) to “On” position.
• Set the output switch (Q2) to “On” position.
• Make sure that the UPS is in bypass mode (green and yellow LEDs signal “
bypass”)
• Set the manual bypass switch (Q5) to “Off” position and refit the mechanical
block (BL) and the screws (t2).
It is an essential requirement for safety to refit the mechanical block (BL), as this
avoids dangerous usage of the UPS and the loads connected to it.
Start up the inverter. The startup operation will be initiated through the keypad
of the control panel ((3) from Fig.25). Select “CNTL” and Press (ENT) into control