In brief
Fault code 356 on Atlantic Alféa means: Fault code 356 is specific to the flow meter (often on recent or Duo models). It indicates that the flow sensor turbine is not rotating or not sending a pulse. Most common cause: Flow meter blocked by debris, disconnected connector, or faulty flow valve. First action: Check the flow meter connection on the control board.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
According to the Atlantic Alféa Duo Technical Manual, fault code 356 indicates insufficient flow in the hydraulic circuit.
356 • Atlantic • Alféa
Fault Code 356 Atlantic: Flow Sensor — Diagnosis
Fault code 356 is specific to the flow meter (often on recent or Duo models). It indicates that the flow sensor turbine is not rotating or not sending a pulse.
Source: Atlantic Alféa Duo Technical Manual
Ask Marcel Team
Certified HVAC technicians
Written and field-validated by heat-pump, air-con and heating installers. Cross-checked against more than 50,000 documented fault sheets.
What does fault code 356 on Atlantic mean?
Fault code 356 is specific to the flow meter (often on recent or Duo models). It indicates that the flow sensor turbine is not rotating or not sending a pulse.
Flow meter blocked by debris, disconnected connector, or faulty flow valve.
Symptoms
- Heat pump shutdown
- No heating
Diagnosis
1. Check Wiring
- Check the flow meter connection on the control board.
2. Clean
- Remove the flow sensor and check that it is not seized.
Repair and return to service — Atlantic fault 356
Clean or replace the flow meter.
When should you call an F-Gas engineer?
Contact an F-Gas registered engineer if the fault returns after basic checks, involves refrigerant charging, or requires PCB or compressor replacement on Atlantic Alféa.
Affected models
- Alféa Excellia HP
- Alféa Duo
- Navilink A59
Field context
Common after incomplete purge, strainer not cleaned for 2+ seasons, or circulator replacement without recommissioning the flow meter.
Technical source data
Fault code 356 on Alféa Atlantic is documented as an insufficient flow fault in the hydraulic circuit (Navilink A59 remote). Field diagnosis: closed valves, flow meter wiring, clogged filter or seized flow meter turbine despite apparently correct pressure.
Sources
- Atlantic Alféa Excellia HP ERR 356 — forum terrain (p. 1)
Frequently asked questions
Can fault code 356 Atlantic appear with normal pressure?
Yes: the fault relates to flow (turbine/pulses from the flow meter), not just static circuit pressure.
Will a simple Navilink reset clear fault code 356?
No if the cause is mechanical (blocked flow meter, disconnected connector). The reset does not restore sensor pulses.
Need help with this diagnosis?
Marcel reads your error codes and walks you through them step by step, with sourced answers.
Or keep going right now in your browser:
