E53 — CT Current Over Low or Current sensor Abnormality

What does E53 mean?

This error indicates that the compressor's current sensor sampling value is too low after operating at a high frequency (>= 50Hz) for 5 minutes, or there is an issue with the current sensor itself.

• A faulty current transformer (CT) sensor.
• Loose or damaged wiring to the CT current sensor.
• An electrical issue causing abnormally low current readings.

Click steps to track your progress.

1. 1

   Turn off the main power to the Haier unit at the circuit breaker.

2. 2

   Wait for at least 30 seconds.

3. 3

   Restore power to the unit and observe if the error clears.

4. 4

   If the error persists, contact a qualified service technician to inspect the CT current sensor and its connections.