Confirm the error code in the display
Symptom
1. Confirm the error code in the display.
Reason
1. This indicates a communication error between Main PCB and display.
How to fix
1. Display Type : External Digital Dispenser Control
Freezer Temp : ER
Refrigerator Temp : CO
This error requires service.
Connection between the display PCB and main PCB poor. Request a technician to check.