Simovert VC 6SE7021-8EB21-Z Incorrect DC link voltage reading repair: Difference between revisions
From Repair Wiki
More actions
(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== <!-- Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing. --> Repair of a problem where the rectified DC link voltage reading is incorrect on this Siemens Simovert VC inverter. File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No...") |
No edit summary |
||
| (3 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=Simovert VC 6SE7021-8EB21-Z | ||
|Affects parts= | |Affects parts=Measure resistor | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station | ||
|Type= | |Type=Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
==Problem description== | ==Problem description== | ||
<!-- | <!-- | ||
| Line 13: | Line 13: | ||
Repair of a problem where the rectified DC link voltage reading is incorrect on this Siemens Simovert VC inverter. | Repair of a problem where the rectified DC link voltage reading is incorrect on this Siemens Simovert VC inverter. | ||
[[File: | [[File:20240717 131244.jpg|thumb|The measure resistors (figure 1)]] | ||
==Symptoms== | ==Symptoms== | ||
<!-- | <!-- | ||
| Line 21: | Line 22: | ||
*Measuring with MM yields correct voltage but the inverter measures it incorrectly | *Measuring with MM yields correct voltage but the inverter measures it incorrectly | ||
*Inverter won't run and low DC voltage error | *Inverter won't run and low DC voltage error | ||
==Solution== | ==Solution== | ||
| Line 30: | Line 31: | ||
On the power board, there is a vertical ceramic resistor that houses 2 resistors inside. Desolder it out and measure both resistors, they should measure the same, if not, you'll need to replace the resistor with an external one. Make sure to use a 1% or less tolerance. | On the power board, there is a vertical ceramic resistor that houses 2 resistors inside (figure 1). Desolder it out and measure both resistors, they should measure the same, if not, you'll need to replace the resistor with an external one. Make sure to use a 1% or less tolerance. | ||
Latest revision as of 11:15, 17 July 2024
| Simovert VC 6SE7021-8EB21-Z Incorrect DC link voltage reading repair | |
|---|---|
| Device | Simovert VC 6SE7021-8EB21-Z |
| Affects part(s) | Measure resistor |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
Problem description
Repair of a problem where the rectified DC link voltage reading is incorrect on this Siemens Simovert VC inverter.
Symptoms
- Incorrect DC voltage reading
- Measuring with MM yields correct voltage but the inverter measures it incorrectly
- Inverter won't run and low DC voltage error
Solution
On the power board, there is a vertical ceramic resistor that houses 2 resistors inside (figure 1). Desolder it out and measure both resistors, they should measure the same, if not, you'll need to replace the resistor with an external one. Make sure to use a 1% or less tolerance.