Atlantic fault code A5
Fault code A5 on an Atlantic heat pump (including Atlantic Aurea 5) means: Abnormal compressor rotation: Abnormal operation due to too low or too high load. Reset the appliance once. If the code comes back, a part is usually faulty, often the compressor or inverter module. 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 A5 on an Atlantic heat pump indicates: Abnormal compressor rotation: Abnormal operation due to too low or too high load.
Applies to
Atlantic Atlantic Aurea 5, R32 Hybrid Add On.
Fault code A5 on other Atlantic series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Supply voltage drop.
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Fuse CF6 0643XU: 250V 15A 1043XU: 250V 25A.
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Water pump and/or water circuit blocked.
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Supply voltage too low.
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Momentary power interruption (in case of lightning strike).
- A5 on Atlantic Aurea 5, R32 Hybrid Add On: Abnormal compressor rotation: Compressor or PCB.
- A5 on ODU Monoblock Atlantic 11, ODU Monoblock Atlantic 6, ODU Monoblock Atlantic 8, 750732, 750733: Abnormally low pressure.
Matching parts
Atlantic parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.
For fault code A5, the part involved is usually in the category: compressor.
Based on the cause, these original Atlantic parts fit (always check the type number of your appliance):
- Atlantic compressor € 1,740.95
- Atlantic compressor sensor € 41.95
- Atlantic compressor 100klt € 2,078.95
Further reading on this cause
Other Atlantic codes with the same cause
- 63 — Inverter fault
- 72 — Compressor temperature sensor fault
- 84 — Compressor current fault
- 95 — Compressor rotor position detection fault, compressor start fault
- A2 — Overcurrent protection action. DC current detection: Compressor.
- A3 — Compressor temperature protection
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 A5 mean?
Abnormal compressor rotation: Abnormal operation due to too low or too high load.
How do I fix fault code A5 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 A5?
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 A5 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 →