Sensor fault from heat pump 278 — Compressor is blocked: Outdoor sensor fault

Was bedeutet 278 ?

The outdoor sensor (Tho-A) has received an unreasonably high or low value 3 times within 40 minutes. This points to a problem with the sensor.

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

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Inspect the outdoor sensor (Tho-A) for damage.

2. 2

   Verify the sensor's connection.

3. 3

   Test the sensor's electrical readings.

4. 4

   Replace the sensor if it is faulty.