APC 10-40kW 208/480V User's Guide download pdf (Page 18)

18 User Guide APC BC300 Series 40kW 208/450/480V UPS

990-1403

Alarms and Events

Mains is out of

tolerance (This

alarm occurs

during a power

outage)

The utility (AC input) voltage is too

high or too low, so the unit

transfers to battery operation. If

AC input returns to normal, the

unit transfers back to normal

operation. If not, the unit continues

to run on battery until the “Low DC

shutdown” alarm occurs. Then, if

bypass voltage is within the range

programmed into the UPS, the unit

transfers to bypass. If not, the unit

transfers to stand-by and does not

supply output voltage.

If possible, restore AC input

power to the UPS. If AC input is

available to the UPS, ask an

electrician to make sure that 1)

the correct input voltage is

available to the UPS, and 2) this

voltage is within a range the UPS

will accept.

OFF Button

Pushed (If the

alarm was

caused by the

Off button, it is

in the events

log)

A user pushed the red “Off” button

or activated an emergency power

off shutdown. The unit switches to

stand-by mode and does not supply

output voltage.

Restart the unit by pressing the

green button inside the door. If

the unit will not restart, the

alarm was caused by an

emergency power off (EPO)

shutdown. Find out why this

shutdown was activated and

make sure the emergency

situation has passed; then,

restart the unit by deactivating

the emergency power off

shutdown.

Output freq. is

out of tolerance

The output frequency is too high,

low, or unstable (out of tolerance).

The unit transfers to battery

operation and runs on battery until

the “Low DC shutdown” alarm

occurs. Then, the unit transfers to

bypass if bypass is within

tolerance. If not, the unit transfers

to stand-by and does not supply

output voltage.

Ask an electrician to make sure

that the correct input frequency is

being supplied to the UPS. Then,

call APC Global Service.

Output is

moment. out of

tolerance

The output voltage was

momentarily too high or too low

(out of tolerance). If bypass is

within tolerance, the unit transfers

to static bypass operation. If not,

the unit transfers to stand-by and

does not supply output voltage.

If other alarms are also active,

troubleshoot these alarms first. If

this is the only alarm, call APC

Global Service.

Table 5: Possible Alarms

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 35 36

Comments to this Manuals

No comments