E4 - Indoor EEPROM Error

What does E4 mean?

The indoor unit's display shows 'E4', indicating an error with the internal EEPROM (Electrically Erasable Programmable Read-Only Memory) data or the EEPROM itself is damaged. This affects the indoor unit's main control.

• Faulty EEPROM data
• Faulty EEPROM component
• Faulty indoor PCB (Printed Circuit Board)

Click steps to track your progress.

1. 1

   Turn off the main power switch to the air conditioner for at least 30 seconds.

2. 2

   Turn the power back on and restart the unit using the remote control.

3. 3

   If the E4 error reappears, contact a qualified technician as the indoor mainboard may require inspection or replacement.