Riello RDB 2.2 Burner Control (MO 535 - MPF)
Riello RDB 2.2 Burner Control (MO 535 - MPF) Orange + green fast blinking (0.2s/0.2s): Reset button: orange and green fast blinking
The burner control locks out due to an internal voltage monitor error, preventing burner operation.
- Code
- Orange + green fast blinking (0.2s/0.2s)
- Name
- Reset button: orange and green fast blinking
- Controller
- Riello RDB 2.2 Burner Control (MO 535 - MPF)
- Type
- General fault
- What it does
- Warning: the equipment keeps running and flags a problem
- Risk
- GREEN In your wheelhouse
- Reset
- Clears on its own when the condition goes away
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated July 23, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- Which manufacturer manual it comes from, linked
- The 2 common causes listed for this code
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Riello RDB 2.2 Burner Control (MO 535 - MPF) Orange + green fast blinking (0.2s/0.2s) mean?
The burner control locks out due to an internal voltage monitor error, preventing burner operation.
Is Riello RDB 2.2 Burner Control (MO 535 - MPF) Orange + green fast blinking (0.2s/0.2s) dangerous?
It is graded green: in a working tech's wheelhouse with standard tools and low risk.
How do I fix Riello RDB 2.2 Burner Control (MO 535 - MPF) Orange + green fast blinking (0.2s/0.2s)?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other Riello RDB 2.2 Burner Control (MO 535 - MPF) codes
Red steady on · Reset button: steady redOrange steady on · Reset button: steady orangeRed blinking (0.5s/0.5s) · Reset button: red blinkingRed fast blinking (0.2s/0.2s) · Reset button: red fast blinkingGreen + red blinking (0.5s/0.5s) · Reset button: green and red blinkingOrange + green blinking (0.5s/0.5s) · Reset button: orange and green blinkingRed + green inverted flashing (2.5s/0.5s) · Reset button: red and green inverted flaRed + orange inverted flashing (2.5s/0.5s) · Reset button: red and orange inverted fl
All 9 Riello RDB 2.2 Burner Control (MO 535 - MPF) codes · Every fault code