Nibe Heat Pumps: manuals, user guides and error codes
Looking for a Nibe heat pump manual, user guide, or error code explanation? ServiceMy has created a dedicated resource hub to help homeowners quickly find the information they need for their system.
Our guide library includes downloadable manuals, setup instructions, troubleshooting advice and clear explanations of common error codes. If your Nibe heat pump is showing a fault code, not heating properly, or you simply want to understand how to operate it more efficiently, our guides are designed to help you identify the issue and keep your system running smoothly. These resources are regularly updated and written by experienced heat pump engineers to help you get the most from your heating system, improve efficiency and avoid unnecessary breakdowns.
These apply for the following air source heat pump models:
- F2040-12
- F2040-16
- F2040-6
- F2040-8
- F2050-10
- F2050-12
- F2050-6
- F2120-16
- F2120-20
- F2120-8
- S2125-12
- S2125-16
- S2125-20
- S2125-8
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Heat pump malfunctions: Nibe Error Codes
If you cannot find the error code explanation or need help resolving any issues, ServiceMy can help diagnose and arrange a professional heat pump service to restore your system to optimum performance.
| Error Code | Title | Explanation |
| 50 | High Pressure Alarm | Refrigerant pressure too high; often caused by poor system flow, blocked heat exchanger, or high return temperatures. |
| 51 | Low Pressure Alarm | Refrigerant pressure too low; typically due to leaks, low charge, or airflow issues. |
| 52 | High Condenser Temperature | Condenser temperature too high; may indicate poor heat transfer or flow issues. |
| 53 | Low Evaporator Temperature | Evaporator temperature too low; possible airflow restriction or refrigerant imbalance. |
| 54 | Compressor Discharge Temperature High | Compressor overheating; may indicate high load or circulation issues. |
| 55 | Evaporator Sensor Fault | Fault with evaporator temperature sensor. |
| 56 | Condenser Sensor Fault | Fault with condenser temperature sensor. |
| 57 | Suction Gas Sensor Fault | Refrigerant suction temperature sensor failure. |
| 58 | Discharge Gas Sensor Fault | Compressor discharge sensor fault. |
| 59 | Outdoor Temperature Sensor Fault | External air sensor failure; impacts weather compensation. |
| 60 | Flow Temperature Sensor Fault | Heating flow sensor fault; affects system control. |
| 61 | Return Temperature Sensor Fault | Return sensor fault; may cause incorrect modulation. |
| 62 | Hot Water Sensor Fault | Cylinder sensor failure affecting DHW production. |
| 63 | Brine In Sensor Fault (GSHP) | Ground loop inlet sensor fault (ground source systems). |
| 64 | Brine Out Sensor Fault (GSHP) | Ground loop outlet sensor fault. |
| 65 | Room Sensor Fault | Indoor room temperature sensor failure. |
| 66 | Exhaust Air Sensor Fault | Fault with exhaust air sensor (exhaust air systems). |
| 67 | Fan Fault | Fan motor not operating correctly or airflow issue. |
| 68 | Circulation Pump Fault | Pump not operating or insufficient flow. |
| 69 | Low System Pressure Alarm | Heating system pressure too low; check for leaks or filling loop. |
| 70 | High System Pressure Alarm | Heating system pressure too high; expansion vessel or filling issue. |
| 71 | Flow Switch Alarm | No water movement detected; indicates circulation issue. |
| 72 | Defrost Fault | Defrost cycle not operating correctly. |
| 73 | Anti-Freeze Alarm | System protecting against freezing conditions. |
| 74 | Communication Fault | Communication error between system components. |
| 75 | Inverter Fault | Compressor inverter malfunction. |
| 76 | Electrical Overcurrent Alarm | Excess current detected; possible compressor or wiring issue. |
| 77 | Voltage Fault | Power supply outside acceptable limits. |
| 78 | Compressor Fault | General compressor fault or failure to operate. |
| 79 | EEPROM / Control Board Fault | Internal memory or PCB issue. |
| 80 | Configuration Fault | Incorrect system configuration or parameter setup. |
| 150 | Low Flow Alarm | Insufficient water circulation; commonly airlocks, pump failure, or blockage. |
| 151 | High Flow Temperature Alarm | Flow temperature exceeded safe limits. |
| 152 | Return Temperature Too High | Return temperature too high; may indicate poor heat extraction. |
| 153 | Temperature Difference Alarm | Abnormal delta between flow and return; indicates circulation issues. |
| 154 | Hot Water Temperature Too High | DHW temperature exceeded safe limits. |
| 155 | Heat Pump Blocked | System locked out due to repeated faults. |
| 156 | External Alarm Active | External control or safety device triggered shutdown. |
Schedule Your Heat Pump Service Today
Don’t wait until efficiency drops, or your pump encounters issues. Investing in routine maintenance for your air source heat pump is the best way to keep your household energy-efficient, cosy, and cost-effective year-round.
Get in touch with our professional servicing team today to schedule your appointment. With extensive experience in heat pump servicing and home energy solutions, we’re here to help you stay warm, save money, and protect your investment.
Maintain your heat pump, and it will reward you with years of efficient and reliable performance.
