5513 - Bosch Heat Pump Z1 condensation too high alarm

What does 5513 mean?

This alarm indicates that condensation levels in Bosch Heat Pump zone 1 are too high. It triggers after 3 warnings in 3 hours, or if a warning is active for 30 minutes.

• The screw terminal on the I/O board to the drip pan sensor TA4 is not tightened.
• The drip pan sensor TA4 has failed.
• A blockage or issue with the Heat Pump's condensation drainage.

Click steps to track your progress.

1. 1

   Check for any visible blockages or overflowing in the Heat Pump's condensation drip pan.

2. 2

   If the Heat Pump was recently serviced, contact your installer to check the screw terminal on the I/O board for drip pan sensor TA4.

3. 3

   If the alarm persists, contact a qualified technician to inspect sensor TA4 and the I/O board.