Error Code: EH 00 – Indoor Unit EEPROM Malfunction

Error Code: EH 00 – Indoor Unit EEPROM Malfunction

What this means:
The indoor PCB’s main control chip is not receiving proper feedback from the EEPROM — a chip that stores configuration data. If the EEPROM cannot be read, the system cannot start or function properlyTS19.

Try this first (quick reset):

1. Shut off the power to the system.

2. Wait at least 2 minutes.

3. Turn the power back on and check the indoor display.

• If the error is cleared — the EEPROM may have recovered.

• If the error remains — proceed to replacement.

Next steps (for technicians):

• If the code remains visible → replace the indoor main PCB.

What you might need:

• Indoor main PCB

• (Note: For EC 51 or EH 0A, outdoor PCB may also apply.)

Helpful tip:
The EEPROM is a small memory chip built into the PCB. It cannot be replaced independently — replacing the board is the only viable repair method.

Click here to view the detailed guide.TS19