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APC Back-UPS RS 900

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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BWDS_apc
Ensign
Ensign
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272

APC Back-UPS RS 900

This was originally posted on APC forums on 6/28/2010


I have just replaced the battery on this unit and having plugged it in, then unit acts like it is unplugged for a brief moment, then a clicking noising is heard (like perhaps it it switching to AC power) then it repeats the on-battery-power-beeping-then-clicking.

Anyone have an idea what is going on?

The AC power is good, as I've been able to use it to test/repair/recharge other UPS before.

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BWDS_apc
Ensign
Ensign
0 Likes
0
273

APC Back-UPS RS 900

This was originally posted on APC forums on 6/28/2010


I have just replaced the battery on this unit and having plugged it in, then unit acts like it is unplugged for a brief moment, then a clicking noising is heard (like perhaps it it switching to AC power) then it repeats the on-battery-power-beeping-then-clicking.

Anyone have an idea what is going on?

The AC power is good, as I've been able to use it to test/repair/recharge other UPS before.

See Answer In Context

3 Replies 3
BWDS_apc
Ensign
Ensign
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0
273

Re: APC Back-UPS RS 900

This was originally posted on APC forums on 6/29/2010


Here is some additional information:
When the unit is plugged in and no lights are on, with a 100W bulb plugged into the battery back up slot:
-there is a slight buzzing noise that can be heard, presumably from the AC-DC conversion process.
-If I simply push the button the unit will beep and nothing may happen, it may turn on.
-if I push and hold the button for ~10 seconds, the unit will flash all 4 lights maybe 4 or 5 times, then on release the unit turns on.
-when the unit is turned on the attached bulb is lit, 'On Battery' light is lit and the 'On Power' light flashes for a few seconds(then finally turns off), the relay clicks immediately when it is turned on. Once the 'On-Line' light has stopped flashing, the 4-beeps-every-30-seconds starts.

When the unit is plugged in and no lights are on, with a 100W bulb plugged into the surge protection: slot:
-when power is attached, the buzzing noise is heard and the light turns on, even though the unit is turned off
-If I push the power button, the relay clicks, the 'On Battery' light is lit and the 'On Power' light flashes for a few seconds(then finally turns off). Once the 'On-Line' light has stopped flashing, the 4-beeps-every-30-seconds starts.

in either case, leaving the unit on results in:
light stays on, the unit begins to:
-beep every 30 seconds (up to 4 times) and randomly clicks(the relay switching). When the unit clicks, then 4-beeps/30 seconds restarts. Sometimes is clicks in the middle of the 4 beeps, sometimes not.

I have PC Enterprise Edition available, but haven't yet plugged it in to that as the computer with it on it is locked by another co-worker.
Will advise when I get a chance to look at it.

BWDS_apc
Ensign
Ensign
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273

Re: APC Back-UPS RS 900

This was originally posted on APC forums on 7/5/2010


According to PCEE, it doesn't recognize the unit.
According to PCPE.. the voltage varies, but not enough to trigger the battery.

BWDS_apc
Ensign
Ensign
0 Likes
0
274

APC Back-UPS RS 900

This was originally posted on APC forums on 6/28/2010


I have just replaced the battery on this unit and having plugged it in, then unit acts like it is unplugged for a brief moment, then a clicking noising is heard (like perhaps it it switching to AC power) then it repeats the on-battery-power-beeping-then-clicking.

Anyone have an idea what is going on?

The AC power is good, as I've been able to use it to test/repair/recharge other UPS before.