Micro Master 6SE3121-3DC40 panel flickering, not turning on repair: Difference between revisions
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Fixing a problem with a Siemens inverter Micro Master 6SE3121-3DC40 where the operator panel display is flickering and the inverter isn't starting properly. | Fixing a problem with a Siemens inverter Micro Master 6SE3121-3DC40 where the operator panel display is flickering and the inverter isn't starting properly. | ||
[[File:20240613 145315.jpg|thumb|Damaged area, C14 cap is blown (Figure 1)]] | [[File:20240613 145315.jpg|thumb|Damaged area, C14 cap is blown (Figure 1)]] | ||
[[File:20240613 145820.jpg|thumb|Carbonization of the PCB (Figure 2)]] | |||
==Symptoms== | ==Symptoms== | ||
Latest revision as of 18:27, 13 June 2024
| Micro Master 6SE3121-3DC40 panel flickering, not turning on repair | |
|---|---|
| Device | Micro Master 6SE3121-3DC40 |
| Affects part(s) | C14 capacitor (39uF 35V) |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
Problem description
Fixing a problem with a Siemens inverter Micro Master 6SE3121-3DC40 where the operator panel display is flickering and the inverter isn't starting properly.
Symptoms
- Flickering display.
- Not starting.
- Various errors if started then turns off
- Symptom 1 (Figure 1)
- Symptom 2
Solution
Upon visual inspection, it was clear that C14 (figure 1) is blown. This capacitor is 39uF at 35V. After taking the capacitor off the PCB, there was obvious carbonization of the PCB (because of excessive heat) and all of it needed to be removed. After that, made sure there are no shorts anywhere (especially IGBT) and proceeded to replace the capacitor. I've used a 47uF instead and it worked just fine.