ATAG fault code 931-15
Fault code 931-15 on an ATAG heat pump (including ENERGION IDM and ENERGION IDM 2Z) means: Subcode par 13.9.1 Compressor Speed Less than Zero. 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 931-15 on an ATAG heat pump indicates: Subcode par 13.9.1 Compressor Speed Less than Zero.
Applies to
ATAG ENERGION IDM, ENERGION IDM 2Z, ENERGION IDM F, ENERGION IDM F 2Z, ENERGION IDM L, ENERGION IDM L F, ENERGION IDU M, ENERGION IDU M F 2Z, 3301759, 3301760, 3301761, 3301762, 3301763, 3301764, 3302241, 3302242.
Click a model for the parts list and exploded view of that appliance.
Matching parts
ATAG parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
Parts per Atag-series: A Series · i Series (iCon) · Q Series · E Series · P-series (iCon) · Blauwe Engel · XL-series.
Based on the cause, these original ATAG parts fit (always check the type number of your appliance):
- Atag wiring harness compressor 65153731 € 142.95
- Atag compressor wiring 65116766 € 130.95
Further reading on this cause
Other ATAG codes with the same cause
- 905 — HP compressor configuration error
- 910 — Inverter communication error - TDM
- 931 — Inverter fault
- 931-1 — Subcode par 13.9.1 Compressor ipm current sampling failure
- 931-16 — Subcode par 13.9.1 Compressor current no change
- 931-17 — Subcode par 13.9.1 Compressor Speed Mismatch vs Calc
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 ATAG heat pump fault code 931-15 mean?
Subcode par 13.9.1 Compressor Speed Less than Zero.
How do I fix fault code 931-15 on an ATAG 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 ATAG fault code 931-15?
That depends on the exact cause. In the ATAG parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 931-15 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 ATAG heat pump faults and codes at a glance →