Overload led constantly blinking

what model is it , rear sticker, shows moldel.
APC makes vast 1500watt ups, not told.
first replace of first test the batteries, 9 of 10 times bingo EOL batteries. RIP
smt1500
bx1500
SAU1500? ahh has 6 led faults and the manual covers that.

blinks sequentially means AC power lost to the building, wall or breaker to this service panel tripped, loss of POWER

page 11 in your manual read it. it tells both off those

ALL LEDS ARE LIT AND THE UPS EMITS A CONSTANT BEEPING
Internal UPS fault.Do not attempt to use the UPS. Turn the UPS off and have it serviced imme-
diately.

and
FRONT PANEL LEDS FLASH SEQUENTIALLY
The UPS has been shut down
remotely through software or
an optional accessory card.
None. The UPS will restart automatically when utility power returns.

Hi,
this problem is caused control board with that. the solution is replacement.

If there is an internal fan oil it's pivot or replace it.
If not circuit board is faulty. Time to buy new UPS. I have one like this that cannot be repaired.

no model told at all
turn the UPS around see rear
see tag see true model # on top of tag
tell it first. the post questions.

6 LED??
on left front
the manual explains those for sure
all 6 stuck on
all 6 blink
all 6 sequence
or many binary codes 6 bits wide all in the manual./
apc.com
RTM

https://www.apc.com/us/en/download/doc-group-type/67173947443-Manuals+and+Warranties/

remove the load fom the ups and restart the ups. if the ups alarms again then the problem is in the inverter.

hi, if the leds blinking are for batteries (the ones above the battery symbol) then its not that the machine is not faulty. it needs some calibration constants. contact your local apc service engineer centre. this happens especially after battery change.

you may have to many things plugged into the ups, it is not good to plug a power bar into one of the outlets of one of these as you are OVERLOADING the device with more power than it can produce

I have seen this caused by a defective battery. Disconnect the battery and reconnect to AC and see if the overload symptom disappears.

Lou

Internal fault.