Openai/694d11d7-0188-8003-a144-2bbd3483ff66

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gpt-5-2

User: What is the issue with this Evotron pellet burner system?

What is the issue with this Evotron pellet burner system?

Assistant: From the photo, the DAB Evotron circulation pump on the pellet burner is showing a fault/alarm condition.

From the photo, the DAB Evotron circulation pump on the pellet burner is showing a fault/alarm condition.

What the indicators mean

• Green “L” → power is present
• Green “III” → pump is set to speed/curve III
• Red triangle (alarm) → pump fault

Most likely issue

The red alarm on an Evotron almost always means the circulation pump is not running correctly, which on pellet systems commonly causes the burner to shut down or overheat. Typical causes are:

• Pump rotor blocked or seized (very common if the system sat unused)
• Air trapped in the system (pump running dry)
• Dirty system / sludge or debris blocking the pump
• Insufficient system pressure
• Electrical fault inside the pump (less common)

Why this matters for the pellet burner

If the pump cannot circulate water:

• Heat is not removed from the boiler
• The pellet burner goes into safety shutdown
• You may get overheating or ignition failures

What to check next

1. Bleed air from the system and pump
2. Check system pressure (usually ~1–1.5 bar when cold)
3. Power-cycle the pump (off for 30 seconds, then on)
4. If accessible, manually free the pump rotor
5. Check for dirt filters/strain­ers in the heating circuit

If the alarm remains after bleeding and pressure checks, the pump may need cleaning or replacement.

If you want, tell me:

• Does the pump make any noise or vibration?
• Is the boiler showing an overheat or circulation error?

That will narrow it down quickly.