"Dead Luminous Inverter Repair" Do you want to learn how to repair a dead luminous inverter, do you want to learn how to repair a luminous inverter in dead condition. Are you searching for dead luminous inverter repair, how to repair a dead luminous inverter, luminous inverter repair, luminous solar inverter repair, luminous ups repair or inverter repair. If yes, Infoguide Ng has brought a complete step by step guide of how to repair a dead luminous inverter. This article will use luminous eco watt 900w inverter as illustration. You can use the step by step guide here to repair other model of luminous inverter. This article cover the Troubleshooting and Repairing a Luminous Eco Watt 900 Inverter in "Dead Condition" This article details the process of diagnosing and repairing a Luminous Eco Watt 900 inverter experiencing a "dead condition". A dead condition is characterized by the inverter failing to activate any functions or draw current when connected to a power line or battery.
Initial Diagnosis and Voltage Checks
The specific unit under repair was identified as a Luminous company inverter, model Eco Watt 900. The troubleshooting process began using a multimeter.
Initial checks confirmed that the inverter was receiving power, as 12 volts were measured at the positive test point. Despite this presence of input power, the inverter remained off because it was in a "dead condition".
The primary focus of the repair was verifying the supply to the microcontroller. The microcontroller requires a supply, typically 5 volts, which is converted from the 12-volt input supply via a regulator.
Upon checking the input side of the microcontroller (labeled "900") at Pin 1, a voltage of 12.56 volts was measured. This confirmed that the supply was reaching the initial stages of the circuit.
Identifying the Root Cause: The Open Resistor.
The supply path to the microcontroller involves a resistor. This component works to supply the current to the microcontroller.
When inspecting the circuit, the repair focused on a small, 1-ohm resistor located near the supply path. This resistor acts as a protective mechanism, similar to a fuse.
Critical findings from the voltage measurement revealed the fault:
- Supply voltage (12.56 volts) was present before the 1-ohm resistor.
- However, when the output side of the resistor, leading toward the microcontroller, was checked, the voltage was 0.00 volts.
This diagnostic test proved that the 1-ohm resistor (labeled "1 0 K") had become open (failed or burnt out like a fuse). Because this crucial 1-ohm resistor was open, current was prevented from reaching the microcontroller, thereby keeping the inverter off.
Related Component Failure
The failure of the resistor also led to the failure of adjacent components. Specifically, the associated capacitors were observed to have swelled or bulged from the top. If a resistor opens, the failure of the capacitors may occur.
The damaged resistor, when removed and checked using a multimeter set to the beep mode (continuity check), registered nothing, confirming it was open.
Repair, Replacement, and Verification
To confirm the diagnosis, a new 1-ohm resistor was temporarily connected. The instant the new resistor was connected, the inverter immediately activated, sounding an audible tone and lighting up the front panel, confirming that the open resistor was the core issue.
For the permanent repair, the plate (PCB) was opened, and the faulty components were replaced:
- The damaged 1-ohm resistor was replaced with a new one.
- The swollen and bulged capacitors were also replaced.
After installing the new components, the inverter was reassembled.
Post-Repair Verification Checks: The inverter was tested to ensure the proper voltages were reaching the microcontroller.
- Pin 1 was confirmed to receive 12.5 volts.
- Pin 20, which often relates to the converted supply, showed 5 volts, confirming that the microcontroller was now receiving power.
The inverter successfully turned on and powered up. When connected, an LED lit up, and the display showed a "low battery" message (since a physical battery was not connected for the test).
The functionality of the charging circuit was also verified using a clip-on ammeter. The ammeter indicated a current of 12 or 13 amps, confirming that the charging function was operating correctly.
The inverter was fully repaired, operating properly in "eco mode," and ready for use. The primary solution was replacing the open 1-ohm resistor and the bulged capacitors.
Analogy to solidify understanding: The 1-ohm resistor that failed acted like a small, critical gatekeeper for the microcontroller. When the resistor opened (blew out), it was like closing the main gate to the city (the microcontroller). Even though the main road (12V supply) was still active outside the gate, the city inside remained dark and unresponsive until a new, working gatekeeper (the new resistor) was installed.
You can follow this step by step guide to repair your dead luminous inverter.
You can also read Luminous Inverter Short Circuit Repair Here
Here's a video that explain Dead Luminous Inverter Repair.
