Allarme pressostato caldaia La Cimbali — Boiler Overpressure / Safety Valve Release
At a glance
- Severity
- FAULT STOP
- Domain
- ESPRESSO_MACHINE_SYSTEM
- Reference standard
- PED 2014/68/EU - Pressure Equipment Directive
- Product / context
- Boiler pressure switch alarm
What it means
The boiler safety valve has opened, releasing steam because the internal pressure exceeded the set limit (typically 1.8-2.0 bar for the steam boiler). The regulation pressurestat did not cut off heating at the set value.
Probable causes
- Regulation pressurestat faulty with contacts welded in the closed position.
- Heating element permanently energized due to relay fault on the board.
- Safety valve with weakened spring opening at too low a pressure.
- Massive limescale in the boiler reducing the usable volume and increasing pressure.
Where to start
Check the steam boiler pressure gauge. What was the reading before shutdown? Is the regulation pressurestat calibrated correctly (typically 1.2-1.4 bar)?
Full guided diagnosis in the app
The diagnostic tree for this fault has 6 guided steps with measurements, checks and resolutions. You'll find it in HorecaIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More La Cimbali codes
- Allarme flussimetro / dosatura — Group Head Dispensing Timeout / Flowmeter Error
- Allarme macinino — Grinder Dosing Error / Beans Not Feeding
- Allarme sistema latte — Steam Wand No Output / Low Steam Pressure