Atlantic fault code 127
Fault code 127 on an Atlantic heat pump (including Indoor unit ALFEA EXCELLIA M 1S and Indoor unit ALFEA EXCELLIA M DUO) means: Anti-legionella temperature: Anti-legionella temperature setting not reached. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code 127 on an Atlantic heat pump indicates: Anti-legionella temperature: Anti-legionella temperature setting not reached.
Fixing fault code 127: step by step
- Reset the appliance once; a one-off measuring error will then clear.
- Where you can reach it without opening the sealed combustion section, check that the sensor plug is seated firmly and the wiring is undamaged.
- If the code comes back, the sensor or its wiring is usually faulty (short or open circuit). Sensors in the sealed combustion section should be replaced by a qualified heating engineer.
Applies to
Atlantic Indoor unit ALFEA EXCELLIA M 1S, Indoor unit ALFEA EXCELLIA M DUO, IDU ALFEA EXTENSA DUO AI 10 R32, IDU ALFEA EXTENSA DUO AI 3 R32, IDU ALFEA EXTENSA DUO AI 5 R32, IDU ALFEA EXTENSA DUO AI 6-8 R32, 024306, 024307, 024308, 024309, 24160, 24161.
Matching parts
Atlantic parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
This message does not point directly to one faulty part. If the code keeps coming back, view the Atlantic parts:
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does Atlantic heat pump fault code 127 mean?
Anti-legionella temperature: Anti-legionella temperature setting not reached.
How do I fix fault code 127 on an Atlantic heat pump?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for Atlantic fault code 127?
That depends on the exact cause. In the Atlantic parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 127 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All Atlantic heat pump faults and codes at a glance →