ERR-COMM
Midea ERR-COMM Error Code – Communication Error
Air Conditioner · HIGH Severity
What This Error Means
Indoor and outdoor communication error
Diagnostic & Repair Steps
1
Check Communication Wire
Inspect cable between indoor and outdoor units.
Inspect cable between indoor and outdoor units.
INSPECT
~10 min
2
Power Reset
Turn off at breaker, wait 5 minutes, restart.
Turn off at breaker, wait 5 minutes, restart.
RESET
~5 min
3
Reconnect Communication Cables
Disconnect and reconnect at both PCBs.
Disconnect and reconnect at both PCBs.
CHECK
~10 min
4
Test Wire Continuity
Verify with multimeter. ⚠️ Disconnect power first
Verify with multimeter. ⚠️ Disconnect power first
TEST
~15 min
5
Replace PCB If Needed
Contact technician if error persists.
Contact technician if error persists.
CHECK
~5 min
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