E68 — Communication Error with DHW I/O PCB

What does E68 mean?

This error indicates that the signal from the DHW (Domestic Hot Water) I/O PCB is not received or contains incorrect data for 2 consecutive minutes. The system will automatically restore itself if correct data is received.

• Loose or damaged communication wiring to the DHW I/O PCB.
• Interference affecting the communication signal.
• A temporary fault with the DHW I/O PCB.

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 communication wiring and the DHW I/O PCB.