CodeRegistry
Brands
  1. Home
  2. Nibe
  3. Air Conditioning
  4. 281
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

281

Sensor fault from heat pump 281 — Compressor is blocked: Low pressure sensor fault

Nibe · Air Conditioning

What does 281 mean?

The low pressure sensor (LPT) has received an unreasonably high or low value 3 times within 40 minutes. This points to a sensor problem.

Common Causes

  • Open circuit or short circuit on sensor input
  • Defective sensor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the low pressure sensor (LPT) for damage.

  2. 2

    Ensure the sensor is properly connected.

  3. 3

    Test the sensor's electrical output.

  4. 4

    Replace the sensor if it is defective.

Browse all codes in this manual (95)
Verified technical data. Last updated: April 2026

Related Faults

107Sensor flt: BT7 HW sens top 107 — Sensor fault: Hot water sensor151Sen flt: CL11- BT51 pool temp sensor 151 — Sensor fault: Pool temperature sensor152Sen flt: CL12- BT51 pool temper- ature sensor 152 — Sensor fault: Pool temperature sensor
Source: Nibe Air Conditioning
Open Manual (Page 7)Search more codes in this manual