Alarm Z1 5533 - Compressor temperature sensor TR1 failure

What does 5533 mean?

This alarm indicates a persistent failure of the compressor temperature sensor TR1. It is triggered if warnings 5531 (open circuit) or 5532 (short circuit) occur repeatedly or are continuously active for 15 minutes.

• See possible causes for warning codes 5531 and 5532 (Loose connection, broken or shorted sensor/cable, defective I/O module).

Click steps to track your progress.

1. 1

   Note the alarm code 5533.

2. 2

   Contact a qualified Bosch Heat Pump installer or service technician.

3. 3

   The technician will thoroughly inspect the sensor's connections and wiring, and replace the sensor or the I/O module if necessary.