27
ENGLISH
MASTERYS
BC 60-80 kVA - Ref.: IOMMASBCXX06-EN 06
6. OPERATING PROCEDURES
6.1.4. Switching onto manual bypass
Switching onto the manual bypass creates a direct connection between the UPS input and output, completely excluding the
equipment control element.
This operation is performed in the event of standard maintenance on the equipment, so as not to remove the power supply from
the load, or in the event of a serious failure while waiting for the equipment to be repaired.
• From the mimic panel set the
HIGH EFFICIENCY MODE
command from the
COMMANDS > IMMEDIATE COMMANDS
menu.
• Wait for the command to be executed (bypass line on the M1 display on). If this does not take place, suspend the operation (the
auxiliary mains is not suitable for the load).
• Set switch
Q5
to position
1
(bypass on load) and then put switch
Q3
to position
0
(inverter in output OFF).
• Set the battery switches to position
0
(battery circuit open).
• Open the switch
Q4/Q2
.
• In the event of a separate input mains disconnect the UPS primary input mains.
If there is an external manual bypass, carry out the procedure described above before activating this switch.
6.1.5. Return to normal mode
• Set switch
Q4/Q2
to position
1
(input mains ON).
• Set the external battery switches to position
1
(battery circuit closed).
• Activate the start procedure from the commands menu on the mimic panel.
• From the mimic panel set the
HIGH EFFICIENCY MODE
command from the
COMMANDS > IMMEDIATE COMMANDS
menu.
• Set switch
Q3
to position
1
(inverter in output ON).
• Check that alarm A06 is not present (if the alarm is present resolve the problem before continuing).
• Set switch
Q5
to position
0
.
If there is an external manual bypass, put the switch to position OFF.
• From the mimic panel set the
NORMAL OPERATION
command from the
COMMANDS > IMMEDIATE COMMANDS
menu.
6.1.6. Emergency
shutdown
Should it be necessary to interrupt the continuous power supply provided by the UPS quickly (emergency shutdown), this can be
done by putting switch
Q3
to position
0
or, where applicable, by activating the emergency button/switch connected to the
ADC
PCB
.
The UPS output can only be electrically disconnected by means of Q3.
If the UPS is operating from the manual bypass (Q5 in position 1) with mains present, the emergency shutdown
does not interrupt the power supply to the load. In emergency conditions all the power supplies upstream of the
UPS must be disconnected.
