APC 6739380EN/JC Buzzer Operating problem light, Load not protected light, Load protected light

Control panel (cont.)

Buzzer 1 "Operating problem" light

Note:

In parallel systems, this light concerns only the specific UPS.

beep...beep...

! ! + – I O

1

The buzzer sounds in the following situations:

◗load supplied by Mains 2;

◗load on battery;

◗operating problems.

It beeps at a low decibel level and slow rate for minor problems and when the load is supplied from battery power. When the "low battery shutdown imminent" warning is received, the beeps increase in decibel level and rate. Finally, if the inverter shuts down, the beep is loud and continuous. A buzzer reset button is located on the hidden control panel. If the buzzer is reset, a higher level alarm will set it on again.

"Load not protected" light

! ! + – I O

2

This red light 2 signals that:

◗the load is supplied by Mains 2 following inverter shutdown (initiated by the user or by a protective device or a sudden overload) or the opening of the inverter output switch Q5N;

◗battery circuit breaker QF1 has opened, thus making battery power unavailable.

Note:

In a parallel system, this light concerns only the specific UPS. The load may still be protected by the other lines.

! ! + – I O

3

This orange light 3 signals an operating problem or an environment fault, however the load is still supplied by the inverter.

◗operating problems:

◗static switch ventilation fault,

◗static switch control system fault;

◗environment faults:

◗battery temperature outside tolerances,

◗overload greater than 5%,

◗Mains 2 up but with voltage, frequency or phase characteristics outside tolerances with regards to the inverter.

"Battery operation" light

! ! + – I O

4

This blinking orange light 4 signals that the load is on battery power following:

◗a Mains 1 outage or voltage drop;

◗insufficient power on Mains 1, for

example power supplied by an engine generator set requiring additional battery power;

◗battery problem.

"Load protected" light

!	!	+ –	I	O
			5

This green light 5 signals that the load is supplied by the inverter and that the specified battery time is available in the event of a Mains 1 outage. In short, it signals that the system is operating normally.

The load may not be protected if it depends on the other lines. It is necessary to take into account all the "load protected" lights 5 for the different system lines or the light on the control panel of the Static Switch Cubicle, if it exists.

"Inverter on" button

!	!	+ –	I	O
			6
This green button 6			is used to locally
start the inverter. When it is pushed,
the green "load protected" light				5

blinks for 3 seconds, indicating that the start-up order has been received. When the inverter has synchronized with Mains 2, it supplies the load and the green "load protected" light 5 remains on. The load is supplied by the UPS and the system is functioning normally. If the transfer to Mains 2 conditions are not correct (Mains 2 voltage, frequency or phase conditions outside tolerances), the inverter will not start and the system awaits a special order (see the "Hidden control panel" section).

Note:

◗for modular UPSs with external maintenance bypass or parallel UPSs with SSC, transfer of the load to the inverters takes place only when the number of operating lines required to supply the load has been reached;

◗for frequency converters, inverter start-up must take place with the load off or drawing a quantity of power equal to or less than that supplied by a single

UPS.

6739380EN/JC - Page 17