(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== Diagnosing and fixing an issue with an Emerson SP2403 inverter that does not turn on or react to power when connected to 3 phase 400V AC thumb|Location of D18 diode and the TR18 MOSFET (Figure 1) ==Symptoms== *Not turning on. *Not reacting to power. *MOSFET gate switching for split second then stopping and repeating when measur...") |
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{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=Emerson SP2403 | ||
|Affects parts= | |Affects parts=D18 diode (PR 1600) | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station. | ||
|Type= | |Type=Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
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==Problem description== | ==Problem description== | ||
Diagnosing and fixing an issue with an Emerson SP2403 inverter that does not turn on or react to power when connected to 3 phase 400V AC | Diagnosing and fixing an issue with an Emerson SP2403 inverter that does not turn on or react to power when connected to 3 phase 400V AC | ||
Revision as of 12:38, 10 June 2024
| Emerson SP2403 not turning on repair | |
|---|---|
| Device | Emerson SP2403 |
| Affects part(s) | D18 diode (PR 1600) |
| Needs equipment | multimeter, soldering iron, soldering station. |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
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Problem description
Diagnosing and fixing an issue with an Emerson SP2403 inverter that does not turn on or react to power when connected to 3 phase 400V AC
Symptoms
- Not turning on.
- Not reacting to power.
- MOSFET gate switching for split second then stopping and repeating when measured with an oscilloscope.
- VCC for UC2844B going up to 16V then dropping to 7V and raising again on a loop.
Solution
Measure D18 diode in with a multimeter in diode mode. Make sure it measures 0.4-0.7V, anything less or more and it's dead. In this case it was 0.1V on both ways which indicates that it's dead. The original diode was a PR1600. A photoflash rectifier diode with 1600v reverse voltage. I've replaced it with a rectifying diode with 1kV reverse voltage and it started switching properly again and working.If the issue has a single, specific solution, provide it in this section and delete the sub-headers below. Otherwise, if there are multiple potential causes for the problem, outline the process of identifying the root cause and offer corresponding solutions below.