NIBE
The NIBE F2040 is a monobloc air-source heat pump available in 10 kW (F2040-12) and 14 kW (F2040-16) models, featuring an ErP A++ rating and R410A refrigerant.
The NIBE F2040 (F2040-12 / F2040-16) is a monobloc air-source heat pump designed for domestic heating applications in the UK. This page provides technical specifications, operational parameters, and a comprehensive list of fault codes for the F2040-12 (10 kW) and F2040-16 (14 kW) models. It serves as a reference for heating engineers and homeowners seeking detailed information on NIBE's F2040 series.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The NIBE guarantee is based on the unit being installed and commissioned by a NIBE accredited installer, serviced every year and the Benchmark documents completed.
The NIBE F2040 is an inverter-driven monobloc air-to-water heat pump manufactured in Sweden, available in 10 kW (F2040-12) and 14 kW (F2040-16) variants. Both models operate on a 1-phase, 230V supply and utilise R410A refrigerant. The F2040 series is designed to deliver a maximum flow temperature of 58°C and can operate effectively down to an outdoor temperature of -20°C. It achieves an ErP rating of A++ for both 35°C and 55°C applications.
Installation requires a minimum side clearance of 600mm and a front clearance of 1000mm, with a buffer tank being a mandatory component of the hydraulic system. Compatible control units include the NIBE VVM 320, SMO 20, and SMO 40. The standard warranty period is two years, contingent on installation and commissioning by a NIBE accredited installer, annual servicing, and completion of Benchmark documents.
Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/heat-pumps/nibe/f2040-f2040-12-f2040-16#fault-3 to jump straight to the entry.
| Code | Meaning | Details |
|---|---|---|
| 3 | Sensor fault BT3 Show causes & actionsSensor fault, Sensor incoming water in F2040 (BT3). Likely causes
| Details |
| 12 | Sensor fault BT12 Show causes & actionsSensor fault, Sensor outgoing water in F2040 (BT12). Likely causes
| Details |
| 15 | Sensor fault BT15 Show causes & actionsSensor fault, Sensor fluid pipe in F2040 (BT15). Likely causes
| Details |
| 162 | High condenser out Show causes & actionsToo high temperature out from the condenser. Self-resetting. Likely causes
| Details |
| 163 | High condenser in Show causes & actionsToo high temperature into the condenser. Self-resetting. Likely causes
| Details |
| 183 | Defrosting in progress Show causes & actionsNot an alarm, but an operating status. Engineer action Set when the heat pump runs the defrosting procedure | Details |
| 220Lockout | HP alarm Show causes & actionsThe high pressure switch (63H1) deployed 5 times within 60 minutes or for 60 minutes continuously. Likely causes
| Details |
| 221Lockout | LP alarm Show causes & actionsToo low value on the low pressure sensor 3 times within 60 minutes. Likely causes
| Details |
| 223 | OU Com. error Show causes & actionsCommunication between the control board and the communication board is interrupted. There must be 22 volt direct current (DC) at the switch CNW2 on the control board (PWB1). Likely causes
| Details |
| 224 | Fan alarm Show causes & actionsDeviations in the fan speed in F2040. Likely causes
| Details |
| 230 | Continuously high hot gas Show causes & actionsTemperature deviation on the hot gas sensor (Tho-D) twice within 60 minutes or for 60 minutes continuously. Likely causes
| Details |
| 254 | Communication error Show causes & actionsCommunication fault with accessory board. Likely causes
| Details |
| 261 | High temperature in heat exchanger Show causes & actionsTemperature deviation on the heat exchanger sensor (Tho-R1/R2) five times within 60 minutes or for 60 minutes continuously. Likely causes
| Details |
| 262 | Power transistor too hot Show causes & actionsWhen IPM (Intelligent power module) displays FO-signal (Fault Output) five times during a 60-minute period. Likely causes
| Details |
| 263 | Inverter error Show causes & actionsVoltage from the inverter outside the parameters four times within 30 minutes. Likely causes
| Details |
| 264 | Inverter error Show causes & actionsCommunication between circuit board for inverter and control board broken. Likely causes
| Details |
| 265 | Inverter error Show causes & actionsContinuous deviation on power transistor for 15 minutes. Likely causes
| Details |
| 266 | Insufficient refrigerant Show causes & actionsInsufficient refrigerant is detected upon start-up in cooling mode. Likely causes
| Details |
| 267 | Inverter error Show causes & actionsFailed start for compressor Likely causes
| Details |
| 268 | Inverter error Show causes & actionsOvercurrent, Inverter A/F module Likely causes
| Details |
| 271 | Cold outdoor air Show causes & actionsTemperature of BT28 below the value that permits operation Likely causes
| Details |
| 272 | Hot outdoor air Show causes & actionsTemperature of BT28 above the value that permits operation Likely causes
| Details |
| 277 | Sensor fault Tho-R Show causes & actionsSensor fault, heat exchanger in F2040(Tho-R). Likely causes
| Details |
| 278 | Sensor fault Tho-A Show causes & actionsSensor fault, outdoor temperature sensor in F2040 (Tho-A). Likely causes
| Details |
| 279 | Sensor fault Tho-D Show causes & actionsSensor fault, hot gas in F2040 (Tho-D). Likely causes
| Details |
| 280 | Sensor fault Tho-S Show causes & actionsSensor fault, suction gas in F2040 (Tho-S). Likely causes
| Details |
| 281 | Sensor fault LPT Show causes & actionsSensor fault, low pressure transmitter in F2040. Likely causes
| Details |
| 294 | Non-compatible air/water heat pump Show causes & actionsHeat pump and indoor module do not work properly together due to technical parameters. Likely causes
| Details |
| 404 | Sensor fault BP4 Show causes & actionsSensor fault, Sensor high pressure heating/low pressure cooling in F2040 (BP4). Likely causes
| Details |
Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.
Triggered by fault code 220.
Triggered by fault code 221.
Triggered by fault code 3.
Triggered by fault code 12.
Triggered by fault code 15.
Common questions from engineers and homeowners about the NIBE F2040.
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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 28 June 2026.