Alarm Heat Pump Z1 air intake temperature sensor TL2 faulty

What does 5413 mean?

This alarm indicates a fault with the air intake temperature sensor TL2 in Heat Pump Z1, possibly due to a failure or short circuit. It triggers after 3 faults in 2 hours, or 15 minutes of continuous failure or short circuit.

• Air intake sensor TL2 or its signal cable failure.
• Screw terminal on the I/O board to sensor TL2 not tightened.
• Air intake sensor TL2 or its signal cable short circuited.
• Defective I/O board.

Click steps to track your progress.

1. 1

   Locate the I/O board and check the screw terminal connection for the air intake sensor TL2 to ensure it is tightened.

2. 2

   If the alarm persists, contact a qualified technician to check the sensor and its cabling.

3. 3

   Contact customer support if the issue continues.