NIBE alarm code 427
Alarm code 427 on a NIBE heat pump (including F series) means: Inverter alarm Type III: A temporary inverter fault occurred, 3 times within 2 hours or has been continuously active for 1 hour. 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 427 on a NIBE heat pump indicates: Inverter alarm Type III: A temporary inverter fault occurred, 3 times within 2 hours or has been continuously active for 1 hour.
Applies to
NIBE F series, -.
Matching parts
NIBE parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.
Based on the cause, these original NIBE parts fit (always check the type number of your appliance):
- Nibe compressor heater F130 € 111.95
- Nibe compressor for F1145/1245 6kw € 4,848.95
- Nibe compressor for F1145/1245 8kw € 6,667.95
Further reading on this cause
Other NIBE codes with the same cause
- 100 — Permanent communication error with inverter: Permanent communication error with inverter
- 140 — Compressor phase 1 temporarily not present: Compressor phase 1 temporarily interrupted
- 142 — Compressor phase 3 temporarily not present: Compressor phase 3 temporarily interrupted
- 158 — Compressor phase 1 not present: Compressor phase missing or <160V for more than 30 min.
- 160 — Compressor phase 3 not present: Compressor phase missing or <160V for more than 30 min.
- 162 — High condenser OUT temperature, compressor outside operating range: Condenser OUT has…
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 NIBE heat pump alarm code 427 mean?
Inverter alarm Type III: A temporary inverter fault occurred, 3 times within 2 hours or has been continuously active for 1 hour.
How do I fix alarm code 427 on a NIBE 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 NIBE alarm code 427?
That depends on the exact cause. In the NIBE parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 427 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 NIBE heat pump faults and codes at a glance →