Error Code COMM-MAIN-PANEL
Control panel not communicating with main board
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: LED blinks
What This Means
Communication cable disconnected or damaged; Main PCB serial communication circuit failure; Panel PCB failure; Micom reset IC malfunction
What actually causes this:
Loose communication cable or PCB failure
First Thing to Check
Check cable connection between main board and control panel
Parts Involved
How to Fix
- 1
1. Verify cable connection between Main and Panel PCB
- 2
2. Check CN40 pins 2-4 for proper seating
- 3
3. With oscilloscope, verify serial signal transmission
- 4
4. If signals present, replace main or panel PCB
Other Error Codes for RF24R7201EU
Freezer temperature sensor not working
Water overflowing from ice maker or water dispenser
Compressor will not start
Fridge getting too warm
Ice dispenser duct not heating
IO expander chip not responding
Freezer defrost heater not heating
Ice room fan not running