APC MGE 6739380EN/JC User Manual download pdf (Page 18)

Page 18 - 6739380EN/JC

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The hidden panel, located behind the

hinged cover, offers the following

indications and control functions:

◗ environment faults;

◗ general faults in system modules;

◗ special control buttons

(see figure 28).

This panel is identical for all types of

cubicles, however, the controls or

indications 8 that do not concern a

given cubicle are not activated.

Clear fault log

This button 10 clears the alarms stored

in memory. The memory may not be

cleared until the cause of the alarms

has ceased.

Buzzer reset

This button 11 stops the buzzer.

A new fault starts the buzzer again.

Battery charge cycle

This button 12 starts a battery charge

cycle (vented lead-acid batteries only).

The cycle duration may be

programmed (default value is 24

hours). Then the RC automatically

shifts to "floating" mode.

Return to float charge

This button 13 can be used during a

charge cycle to force the RC to return

to "floating" mode.

Security button

This button 14 avoids inadvertent

operation of the remaining three control

buttons:

◗ Mains 2 synchronization or

desynchronization;

◗ forced transfer to inverter with load

interruption;

Hidden control panel (Inverter and Static Switch Cubicles)

Fig. 28

◗ forced inverter shutdown with load

interruption;

When pressing one of the above three

buttons, the security button must also

be pressed at the same time.

Mains 2 synchronization or

desynchronization

This button 15 desynchronizes or

resynchronizes the inverter output

frequency with that of Mains 2.

Note:

◗ for parallel-connected modular

UPSs, this function must be carried out

on all the UPSs.

Forced transfer to inverter with load

interruption

This button 16 transfers the load to

the inverter. If the transfer conditions

(Mains 2 characteristics outside

tolerances) are not correct, the transfer

will result in a 0.8 second interruption in

the supply of power to the load.

Note:

◗ for parallel-connected modular

UPSs, forced transfer of the load will

not take place if the number of

operating UPSs required by the load is

greater than one;

◗ for parallel UPSs with centralised

SSC, this function is available only on

the SSC.

Forced inverter shutdown with load

interruption

This button 17 :

◗ transfers the load to Mains 2;

◗ shuts down the inverter.

It may be used if the transfer conditions

(Mains 2 characteristics outside

tolerances) are not correct, in which

case the "inverter off" button 7 on the

visible control panel produces no effect;

◗ is disabled on the SSC.

"Inverter off" button

This gray button 7 turns the inverter

off.

◗ press the "inverter off" button 7 for

3 seconds;

◗ if the transfer to Mains 2 conditions

are correct:

◗◗ the load is transferred without

interrupting to Mains 2,

◗◗ the inverter shuts down,

◗◗ the green "load protected" light 5

goes off and the red "load not

protected" light 2 goes on.

◗ if the transfer to Mains 2 conditions

are not correct, the button produces no

effect. A special function on the hidden

panel may be used to force the

transfer.

Caution:

If the transfer is forced, the load will be

subjected to a 0.8 second interruption

in the supply of power.

Note:

◗ for Modular UPSs or parallel UPSs

with SSC, the shutdown of an inverter

may or may not result in the transfer of

the load to Mains 2, depending on

redundancy conditions;

◗ if the transfer to Mains 2 conditions

are not correct or if the system does not

have a Mains 2, the shutdown of a

single inverter will result in the

shutdown of the entire system if there is

no redundancy.

Hidden control panel

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12 345

fault

9 10 11 12 13 14 15 16 17

Control panel (cont.)

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 49 50

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APC MGE 6739380EN/JC User Manual Page 18

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