Tip & How-To about Lands Phones

What to do when the "replace system battery" message displays on a Partner ACS system.

The Partner ACS system uses 2 AAA batteries to retain programming from 45 to180 days, in the event of a power outage. When these batteries fail, a system warning (replace sys bat w/ power on) will display on the screen of extensions 10 and 11. Replacing the system batteries doesn't require a service technician and is fairly simple to do providing you know the proper steps.
With new batteries in hand, go to the phone system cabinet and find the system processor. The system processor will be marked on the top third of the card with a label marked "Partner ACS processor".
On the bottom of the processor module,below the extension jacks, there is a battery compartment. With the power on, Push in slightly on the battery compartment and slide the black locking latch up to cover the"+" icon. Remove the battery assembly by pulling the tab at the bottom of the compartment cover.Place the batteries into the metal battery clips fully. Make sure the polarity of the batteries is correct by looking inside the metal battery clips for the "+" and "-" icons cut into the metal of the battery clip. With the locking latch in the unlocked (up) position slide the battery assembly back into the processor card far enough that the edges of the assembly slip behind the plastic housing of the processor card.Slide the locking latch down to secure the battery compartment. The message on your screen will disappear if the batteries are inserted correctly.

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replace system battery,with power on?


The Partner ACS system uses 2 AAA batteries to retain programming from 45 to180 days, in the event of a power outage. When these batteries fail, a system warning (replace sys bat w/ power on) will display on the screen of extensions 10 and 11.With new batteries in hand, go to the phone system cabinet and find the system processor. The system processor will be marked on the top third of the card with a label marked "Partner ACS processor".
On the bottom of the processor module,below the extension jacks, there is a battery compartment. With the power on, Push in slightly on the battery compartment and slide the black locking latch up to cover the"+" icon. Remove the battery assembly by pulling the tab at the bottom of the compartment cover.Place the batteries into the metal battery clips fully. Make sure the polarity of the batteries is correct by looking inside the metal battery clips for the "+" and "-" icons cut into the metal of the battery clip. With the locking latch in the unlocked (up) position slide the battery assembly back into the processor card far enough that the edges of the assembly slip behind the plastic housing of the processor card.Slide the locking latch down to secure the battery compartment. The message on your screen will disappear if the batteries are inserted correctly.

Dec 21, 2010 | Lucent PARTNER18 Corded Phone

1 Answer

I am looking for a manual for our lucent phone. It is flashing replace system battery w/ power on. I don't know where the battery is. Also I would like to change the time. Any online manuels available?


The system batteries are located on the main processor card of the telephone system. there is a door on the lower end. behind the slide door are 2 AAA batteries.Replace them with the power on.
Changing the time on a Partner system is done on either ext 10 or 11. At one of those ext's press the feature key and "00"
next press the left hand intercom twice
the display should say system programming
enter in "#103"
the display should say system time and the current programmed time
enter the new time in 24 hour format
press feature "00" to logout
And finally here's a link to a Partner ACS 3.0 manual: http://www.wedophones.com/Manuals/AT&T/Partner%20ACS%20R3-0%20Programming%20and%20Use.pdf

Jun 11, 2010 | Lucent PARTNER18 Corded Phone

1 Answer

we are getting a message on the led readout on our phone that syas replace SysBatW/Power. What do we do?


Go to the phone system. There will be a processor card, that will say Partner ACS. On the bottom of that card is a small battery compartment that holds 2 AAA batteries. Change those with the power on, or you will lose the programming.

Nov 04, 2009 | Lucent PARTNER18 Corded Phone

1 Answer

After power failure, lines ring once and stop as if call is answered elsewhere. Turned off all answering machines and it still happens.


The system lost its programming. Do you have a Partner plus or Partner II?

Or is it an ACS?

If an ACS, you can restore programming (possibly)

If a Partner II/Plus, the internal battery is bad, I would get a battery backup or replace the processor.

Oct 13, 2009 | AT&T Partner 18 Phone (315805B)

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