UPS SD1110 , positive battery charger module no working

To address the issue with your UPS SD1110 battery charger module, we need to perform a few troubleshooting steps. It sounds like the positive charger might be malfunctioning, as only the negative green LED lights up when 220V AC is connected. Here's a structured approach to diagnose and potentially fix the issue:
Check Connections and Fuses:Ensure all connections are secure and properly attached.Check if there are any blown fuses on the charger module, particularly for the positive charger.Inspect for Physical Damage:Look for any visible signs of damage on the positive charger module, such as burnt components or loose wiring.Measure Input and Output Voltages:Using a multimeter, measure the input AC voltage to confirm it's within the expected range (220V AC).Measure the output voltages of both the positive and negative chargers. The positive charger should provide a specific voltage as per the device specifications.Component Testing:Test individual components such as diodes, capacitors, and transistors on the positive charger module. Faulty components can prevent proper operation.LED Indicators:The green LED on the negative side indicates power; check if the positive side LED itself is faulty. If the LED is functional, it may indicate a deeper issue within the circuit.Cross-reference with the Manual:Consult the user manual for troubleshooting tips specific to the UPS SD1110 model. There might be recommended checks or settings to verify.Reset and Restart:Sometimes, a reset can resolve unexpected issues. Disconnect all power sources, wait for a few minutes, and then reconnect.If you are new to electronics repair or need more detailed guidance, it can be beneficial to Learn Free Skills through online resources. Platforms like Coursera, edX, and even YouTube offer valuable tutorials on electronics and troubleshooting techniques.
Detailed Steps:
Verify Connections and Fuses:Start by turning off the power and unplugging the charger.Carefully inspect all the connections to ensure they are secure.Check for any blown fuses, particularly on the positive charger circuit.Inspect for Physical Damage:Look at the circuit board and components for any signs of damage such as burnt marks or broken parts.Measure Voltages:Set your multimeter to measure AC voltage and check the input at the AC terminals.Switch to DC voltage and check the output at the terminals of the positive and negative chargers.Test Components:If you find that certain components like capacitors or diodes are faulty, replace them and retest.Check LED Indicators:Ensure the positive LED is functional by testing it separately if needed.Consult Manual:Refer to the manual for specific troubleshooting advice related to the UPS SD1110.Reset the System:Disconnect from power, wait, and reconnect to see if a reset resolves the issue.By following these steps, you can systematically identify and resolve the issue with your UPS SD1110 battery charger module. If the problem persists, consider seeking professional assistance to avoid further damage.

Hi there!
The UPS SD1110 issue you're describing usually relates to a faulty battery charging circuit or damaged protection module. You might want to check the charging voltage at the battery terminals and inspect the charger IC and protection MOSFETs. If the battery isn't receiving charge, it could also be due to an over-voltage protection trigger or aging battery pack.
I recently came across some detailed DIY repair and electronics tutorials that explain battery management systems and charging modules - these can help you understand how to test and repair circuits like this. You can find them here: https://easyelecmodule.com/keep-your-batteries-and-your-family-safe-with-a-bms/

1. Check Power Supply:
- Ensure the UPS is properly connected to a working power source.
- Verify that the power switch is turned on and the power cable is secure.

2. Inspect the Battery:
- Check if the battery is properly connected and seated.
- Look for any signs of damage or corrosion on the battery terminals.

3. Examine Fuses and Circuit Breakers:
- Check for any blown fuses or tripped circuit breakers in the UPS. Replace or reset them if necessary.

4. Test the Charger Output:
- Use a multimeter to measure the output voltage of the charger module. Compare the reading to the specifications in the UPS manual.

5. Review LED Indicators and Error Codes:
- Look at the LED indicators on the UPS. Refer to the user manual for interpretations of different LED statuses or error codes.

6. Reset the UPS:
- Perform a hard reset of the UPS by turning it off, disconnecting it from the power source, waiting for a few minutes, and then reconnecting and turning it back on.

7. Update Firmware:
- Check if there's a firmware update available for your UPS model. Updating the firmware might resolve any software-related issues.

8. Consult the Manual:
- Refer to the troubleshooting section of the UPS SD1110 manual for specific instructions and guidance.

9. Contact Support:
- If the above steps do not resolve the issue, contact the manufacturer's customer support for further assistance. They can provide specific diagnostics or guide you through more advanced troubleshooting steps.

If you don't have access to the manual, it can typically be found on the manufacturer's website or through a quick online search for "UPS SD1110 manual."

Maker INFORM. (you forgot the makers name)
220vac can be lethal, are you play with that, unknowing the huge risk to you and other (safety ground put on wrong)
No country told to answer on laws in your country (NEMA, Etc)
the maker states
COMPANY PROFILE
Inform Electronic, one of the European leading power solution specialist,
so asking Yankee's how to wire up EU electrics yes?
it seems not NEW, and is USED UPS, that it?
some of their models of UPS have separate charger is this your
case?
deep googles hit like this.
DSP-COMPACT 10KVA KGK(SD1110-14)+SNMP yes then,
I recommend read the manual first and the chapters on errors

https://www.informups.com/dsp-flexipower-series-10kva.html

the UPS used, must be strapped (config) to run on 1 of 3 input voltages first.
did you RTM read them manual first on that.

here is the 10kva list supported

https://www.informups.com/arama.php?id=10kva