Error Code E CO

Communication error between main MICOM and display MICOM — poor communication connection

Also displayed as: E CO

How to Fix

1. 1

   Step 1: Check all loose connections between display and main PCB harness. Reconnect any loose connectors.

2. 2

   Step 2: Measure voltage at CON101 18th Pin ~ 16th Pin. If NOT 12V, check hinge connection (loose connection) and change Main PCB.

3. 3

   Step 3: Measure voltage at CON101 10th Pin ~ 16th Pin. If NOT 5V, check hinge connection and change Main PCB.

4. 4

   Step 4: Measure voltage at CON101 14th Pin ~ 16th Pin. If reads 0V or 5V (not fluctuating), change Display PCB.

5. 5

   Step 5: Measure voltage at CON101 12th Pin ~ 16th Pin. If reads 0V or 5V (not fluctuating), change Main PCB.

6. 6

   Step 6: Measure voltage at CONS 4th Pin ~ 3rd Pin. If reads 0V or 5V (not fluctuating), change Display PCB.

7. 7

   Step 7: Measure voltage at CONS 5th Pin ~ 3rd Pin. If reads 0V or 5V (not fluctuating), change Main PCB.

8. 8

   Step 8: If all voltage checks pass, explain to customer — communication is functioning normally.

This Error Applies To

LG LRYXC2606 Series Refrigerators