35
ENGLISH
MASTERYS BC 15-40 kVA - Ref.: IOMMASBCXX09-EN 01
ENGLISH
7. OPERATING PROCEDURES
7.4. SWITCHING ONTO MANUAL BYPASS
Switching onto 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 EFF. MODE command from the 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 disconnecting switch Q6 to position 2.
• Set switch Q1 and/or battery switches to position 0 (battery circuit open).
• Open the switch Q2.
If there is an external manual bypass carry out the procedure described above before activating this switch.
7.5. RETURN TO NORMAL MODE
• Set switch Q2 to position 1 (input mains ON).
• Set switch Q1 and/or 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 EFF. MODE command from the IMMEDIATE COMMANDS menu.
• Check that alarm A06 is not present (if the alarm is present, resolve the problem before continuing).
• Set disconnecting switch Q6 to position 1 (inverter in output ON).
If there is an external manual bypass, put the switch to position OFF.
• From the mimic panel set the NORMAL MODE command from the IMMEDIATE COMMANDS menu.
7.6. EMERGENCY SHUTDOWN (ESD)
Should it be necessary to interrupt the continuous power supply provided by the UPS quickly (emergency shutdown), this can
be done by putting disconnecting switch Q6 to position 0 (zero) 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 Q6.
If the UPS is operating from the manual bypass with mains present, shutdown using the emergency button does
not interrupt the power supply to the load. In emergency conditions all the power supply sources upstream of the
UPS must be disconnected.
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