CT-03 — Contactor stuck, circuit C

What does CT-03 mean?

A contactor for compressor C1 is stuck, preventing the compressor from shutting down. This could lead to damage. Ventilation and EXV control are maintained, but a second critical fault could cause shutdown.

• Contactor is mechanically stuck.
• Electrical issue with the contactor coil.
• Contactor contacts welded together.

Click steps to track your progress.

1. 1

   Inspect the contactor for signs of damage or overheating.

2. 2

   Attempt to manually disengage the contactor if safe to do so.

3. 3

   Check electrical connections to the contactor coil.

4. 4

   Reset the alarm; if it returns, the contactor likely needs replacement.