No battery communications

Check this site for parts you are talking about. Search Over 2 1 Million Appliance Parts

I would replace the thermostat, cooling control to the unit, it is sticking. Call your local parts distributor to get the part. This model is on micro fiche and not made digital yet. Unable to locate without a production number from the sticker inside your unit.
Hope this helps

Most wall mounted thermostats use a single AA Alkaline battery to power the thermostat. There should be a panel or door on the thermostat housing that slides open to change the battery.

ccowl, APC has a great website. Have you tried it yet? The knowledge base they have on their products is huge. The cable you are speaking of may just be for monitoring battery voltage status, but that is only a guess. The interconnect cable could be a proprietary APC cable and only APC knows how it is wired "end to end" !!! 12fixlouie

you will need to replace the unit. the charging circut has failed

Have you change the battery? Note: Matrix UPS need to be calibrate after changing batteries or reset the Smartcell communication board. to make sure that the UPS would detect that you already replace it with the new battery

where are u from ? here my email brokenbutte@yahoo.com.sg

Make sure that the battery communication cable is connected the the battery output communication of your smartcell. If Im not wrong maybe you connect the communication cable on the input of the smartcell communication board.

Thanks and Good luck

Have you had the battery and alternator checked yet? If not, you should. It may be that the control units connected to the CAN aren't being supplied the correct voltage(too low) to operate properly.

CAN COMMUNICATION
System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

Component Parts and Harness Connector Location

1. ABS actuator and electric unit (control
unit) E125 (with ABS)
2. IPDM E/R E121
3. Display control unit M95 (with NAVI)
4. BCM M18 5. Combination meter M24
6. Data link connector M22
7. TCM F56 (with A/T) 8. ECM F54

Check you part numbers , if same the new one can be bad even the clock displays