Burner controls, ignition and flame safeguards
Dungs VPS 504 Valve Proving System fault codes
What all 2 Dungs VPS 504 Valve Proving System fault codes mean, in plain words, with a risk grade for each. These come from the manufacturer's own manual. The fix for each one is in WERCS Diagnose.
Get the fixes · plans from $49/moUpdated July 23, 2026
| Code | What it means | Risk |
|---|---|---|
| Red signal lamp lit | Red signal lamp lights The test section is leaky or failed to reach the required pressure increase, which faults the system and stops the burner. | RED |
| Yellow signal lamp lit | Yellow signal lamp lights up The burner continues normal operation because the valve proving test passed and the section is tight. | GREEN |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.