ATAG fault code 931
Fault code 931 on an ATAG heat pump (including ENERGION IDM and ENERGION IDM 2Z) means: Inverter fault Subcode par 13.9.1. 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 on an ATAG heat pump indicates: Inverter fault Subcode par 13.9.1.
Fixing fault code 931: step by step
- Note the exact code and the type of your appliance (see the rating plate).
- Check that the appliance has power and that its circuit breaker is on.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, choose the matching part below or have a qualified heating engineer take a look.
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.
Fault code 931 on other ATAG series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- 931 on ENERGION ODM 11, ENERGION ODM 11 T, ENERGION ODM 120 T, ENERGION ODM 150 T, ENERGION ODM 4, ENERGION ODM 40: Inverter fault.
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 € 148.67
Atag compressor wiring 65116766 € 136.19
Further reading on this cause
Other ATAG codes with the same cause
- 905 — HP compressor configuration error
- 910 — Inverter communication error - TDM
- 931-1 — Subcode par 13.9.1 Compressor ipm current sampling failure
- 931-15 — Subcode par 13.9.1 Compressor Speed Less than Zero
- 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 mean?
Inverter fault Subcode par 13.9.1.
How do I fix fault code 931 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?
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 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 →