Verified boiler fault code
Sime ALL 02 Fault Code (Brava Slim HE ErP)
Low water pressure in the appliance.
Safety disclaimer
Fault code summary
- Manufacturer
- Sime
- Fault code
- ALL 02
- Fault type
- Low pressure, Central heating
- Severity
- medium
- Reset
- The manual's table instructs the user to restore pressure and monitor for leaks; follow the appliance instructions and do not repeatedly reset an unresolved fault.
- Applicable models
- Brava Slim HE ErP 25, Brava Slim HE ErP 30, Brava Slim HE ErP 35, Brava Slim HE ErP 40
Quick answer
Low water pressure in the appliance.
What does this fault code mean?
Low water pressure in the appliance.
Common causes
- Low water pressure in the appliance
Symptoms
- ALL 02 alarm displayed
What can the homeowner safely check?
- Check the heating-system pressure shown by the boiler, without removing the casing.
Boiler reset information
The manual's table instructs the user to restore pressure and monitor for leaks; follow the appliance instructions and do not repeatedly reset an unresolved fault.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- A qualified engineer should investigate the pressure circuit and any pressure loss or leak.
Applicable boiler models
Related fault codes
- ALL 01 — Brava Slim HE ErP
Flue-gas thermostat fault.
Read fault code - ALL 03 — Brava Slim HE ErP
High water pressure in the heating circuit.
Read fault code - ALL 44 — Brava Slim HE ErP
No-flame gas-valve opening-time sum anomaly.
Read fault code - ALL 56 — Brava Slim HE ErP
Lock for delivery/return temperature difference above the maximum limit.
Read fault code - ALL 57 — Brava Slim HE ErP
Lock for the flow-temperature check (open-vent model).
Read fault code - ALL 62 — Brava Slim HE ErP
Self-calibration procedure required.
Read fault code - ALL 72 — Brava Slim HE ErP
Incorrect positioning of the delivery sensor.
Read fault code - ALL 74 — Brava Slim HE ErP
Second delivery sensor fault.
Read fault code
Manufacturer documentation
Brava Slim HE ErP installation, use and maintenance manual (official Sime document 6322841C)Official manual alarm table: | ALL | 02 | Baixa pressão da água no equipamento | - Efetuar a reposição - Monitorizar eventuais perdas no equipamento |
Last verified
2026-09-12
Frequently asked questions
What does Sime ALL 02 mean?
Low water pressure in the appliance.
Can I reset a Sime ALL 02 fault?
The manual's table instructs the user to restore pressure and monitor for leaks; follow the appliance instructions and do not repeatedly reset an unresolved fault.