APC SMART SUA 2200 XL 640-0800G REV 7 Load indicator/detection no working  - Page 1
Forum section: electronics / repair

author: JimboJack
author_rank: Regular Contributor
timestamp: June 20, 2025, 12:26:12 am
content: Hi, allfrist time on this part of the repair section.I have UPS that has a strange fault, guy said the display never worked, it does not show or indicate any load on the system, via display or internally. LED test front panel works.has anyone else seen a fault like this , operates but no load recorded, or just pink elephantsThe system is a SUA 2200XL Rev 7 230V (NOT USA)1. internal monitoring via cable direct into the CPU that no load is present even tho I can put 1KW heater on the output or via the front panel.2. its happy to run off batteries.3. does battery charging.4. swapped with other UPS new batteries.5. measured CT1 current sensor transformer in situ its 3.4 Ohms via R236/R215/R254.6. did a quick replace all the elec caps.7. simple swapped out IC4 and IC5 hex schmit sand LF347next stepsI'm not sure what the resistance should be of CT2 in situ that via measure across R323 and R3341. get a Variac and test for over and under volt operation turbo etc.2. IC 10 has been fried that can be swapped out thats an A/D convertor in cpu. but that have to be just on one specific port pin 6 ? CT2 circuit feeds into this path. I already swapped out IC4 and IC53. IC 19 has been fried which mean its Dead board non replaceable APC chip, as the CT1 circuit feeds into this path4. check every diode and mosfet , NPN and PNP transistor out of circuit? along these paths ?5. check against any working model and see if the parts are the same below on the resistors values looking for .anythoughts ? what else ?tyJamesOn a seperate part the schematic i have is for the 3000XL version 640-0800G (120v),so i don't know what the equivalent parts be for lesser model 2.2KVA 230Vwonder if anyone can check on their board 604-0800 Rev 7 (230V) what values they have listed for a sua2200XL version they hide around IC 19/10/21 close to the heatsink, this parts are related to CT 1 and CT2 feeds into the AD and APC custom IC chip.R27 (near IC 10 ) be close to display port. AD convertor rotation of IC 180 compared to other ICR151 ( right of IC21) (right of IC19)IC19 (near heatsink)R236/R215/R253 60.4RR209 10KR181 7.5KR213 24.9KR208 16.3KR207 49.9 K

author: hiperjz
author_rank: Newbie
timestamp: July 16, 2025, 08:48:06 am
content: Hi,I have a similar Board in SUA3000XL Rack Mount.i can share images!

author: JimboJack
author_rank: Regular Contributor
timestamp: July 16, 2025, 10:11:51 am
content: Update,after looking at pin 13 of and pin14 IC5 whilst running it had a very noisy waveform, went back tracing , to the CT2, removed the 000 ohm resistors R323, resistance was very high on the coil, eventually desoldered the CT2 one of the wires from the ouput coil was corroded held together by flux looks like, did a bit of micro surgery soldering had aboiut 3mm left of copper wire , soldered 1mm wire and some UV setting glue , however i looking to source a CT2 Sensor.So looking for the CT2 sensor transformer, 230V version. Part No. 460-1501-A-Z JTK 0639 , Their is a 460-1501-B-Z but think that is for the 120V (USA) non 230Vthe input resistance is ~0.09 Ohms and the output resistance was ~170 Ohms. my takePart No. 460-1501-A-Z JTK 0639

author: JimboJack
author_rank: Regular Contributor
timestamp: July 16, 2025, 10:20:03 am
content: Hi,you 230V mains ? what is value of your CT2 Current sensor part no, wonder if it is the same value as mine460-1501-A-Z JTK 0639,J.

author: hiperjz
author_rank: Newbie
timestamp: July 18, 2025, 06:21:45 pm
content: Yes! 230V Mains.The Part Number on my CT2 is Different.460-1501A-Z-010642 FALCOhttps://local.com.ua/ferrum/brand/7-apc?lang=1check this,looks similar to my part number but different to yours.