XX-04 — PTC temperature probe out of range

What does XX-04 mean?

The PTC temperature probe for a compressor motor (e.g., B1) is reporting an out-of-range value, indicating a defective probe. The compressor will be shut down.

• The PTC temperature probe is defective.
• Wiring to the probe is faulty or disconnected.
• Signal interference.

Click steps to track your progress.

1. 1

   Inspect the wiring and connection of the PTC probe.

2. 2

   Check the probe's resistance or signal output if possible.

3. 3

   Replace the PTC probe if it is found to be defective.

4. 4

   Reset the alarm after replacement.