NIBE F1245 Ground Source Heat Pumps
17 fault codes documented
Additional heat blocked symbol on display — Auxiliary heating is temporarily stopped
A symbol on the display indicates that the additional heat (immersion heater) is blocked. This can occur due to operating mode settings, scheduled blocking, or an active alarm condition.
Brine Temperature Difference Incorrect (2-5 °C) — Brine flow imbalance
The temperature difference between brine out (BT11) and brine in (BT10) is not within the optimal range of 2-5 °C, indicating an incorrect flow in the brine system.
Buzzer alarm sounds — An internal alarm has been activated
An audible buzzer alarm indicates that the heat pump has detected an internal fault or condition requiring attention. This is a general alarm signal that is preselected at the factory to activate an external relay if connected.
Circulation Pump (GP1) Stopped — Heating medium not circulating
The circulation pump, responsible for moving heating medium, is not operating. This can prevent the system from effectively heating.
Compressor blocked symbol on display — Compressor operation is temporarily stopped
A specific symbol indicates that the heat pump's compressor is blocked. This can happen due to the selected operating mode, scheduled blocking, or an active alarm condition.
Motor protection breaker (FB1) tripped — Compressor power cut due to excessive current
The motor protection breaker, labelled FB1, has automatically cut the power supply to the compressor. This is a safety mechanism that activates if the compressor's current draw becomes too high.
Temperature limiter (FD1) tripped — Electrical addition power cut due to high temperature
The temperature limiter, labelled FD1, has automatically cut the power supply to the electrical addition. This happens as a safety measure if the internal temperature rises between 90 and 100°C. It can be manually reset.
Fan speed symbol on display — Fan speed changed from normal setting
This symbol appears when the fan speed has been adjusted from its normal setting. This function is only available if the NIBE FLM accessory is installed and activated.
Holiday setting symbol on display — Holiday mode is active
This symbol indicates that the 'holiday setting' is currently activated. This mode adjusts the heat pump's operation for periods when the property is unoccupied.
Alarm displayed — Compressor does not start due to incorrect phase sequence
The heat pump displays an alarm, and the compressor fails to start because the electrical phase sequence is incorrect. This is particularly important for F1245-12 models equipped with scroll compressors.
Information sign symbol on display — General information available
An information symbol appears on the display, indicating there is important information in menu 3.1 that you should note. This usually relates to general operational information, system updates, or non-critical advisories.
Low or No Hot Water — Hot water supply is insufficient
The hot water temperature is too low, or there is no hot water available. This can be caused by various operational settings or physical blockages.
Low Room Temperature — House is not warm enough
The room temperature is lower than desired, indicating that the heating system is not effectively warming the space.
Lux mode activated symbol on display — Temporary hot water boost is active
This symbol indicates that the 'temporary lux' mode for hot water has been activated. This mode provides a temporary boost to hot water production, either manually or via an external contact.
Miniature circuit-breaker (FA1) tripped — Internal circuit breaker activated
The internal miniature circuit breaker (FA1) has tripped, cutting power to the heat pump's operating circuit or a large proportion of its internal components. This can occur due to electrical issues or even during transportation.
Red Status Lamp and Alarm Bell — A malfunction has occurred
When a malfunction occurs that the heat pump cannot fix itself, the status lamp changes from solid green to solid red. An alarm bell icon also appears in the information window on the display.
Software Update Interrupted — Power cut or issue during update
The software update process for the F1245 was interrupted before completion, possibly due to a power cut or other unexpected event.