4.9 Star Google Rating
Error Code
The E1 error code on your Hitachi air conditioning unit indicates a communication failure between the indoor and outdoor units. This can prevent the system from operating effectively.
Wiring between the indoor and outdoor units may be loose or damaged, causing communication failure.
A malfunction in the PCB may prevent communication between units.
Voltage fluctuations or power surges can interfere with the communication between the indoor and outdoor units.
Turn off the air conditioner for 5–10 minutes, then turn it back on to reset communication.
Check all wiring between the indoor and outdoor units for loose or damaged connections.
If communication issues persist, the PCB may need to be inspected and replaced by a technician.
