E1
Midea E1 Error Code – Indoor/Outdoor Communication Error
Air Conditioner · HIGH Severity
What This Error Means
Indoor and outdoor units communication fault
Diagnostic & Repair Steps
1
Check Communication Wire
Inspect the communication cable between indoor and outdoor units for cuts, pinches or loose connections.
Inspect the communication cable between indoor and outdoor units for cuts, pinches or loose connections.
INSPECT
~10 min
2
Power Reset
Turn off AC at breaker, wait 5 minutes, restart. ⚠️ Wait full 5 minutes
Turn off AC at breaker, wait 5 minutes, restart. ⚠️ Wait full 5 minutes
RESET
~5 min
3
Check Connector at Both Ends
Disconnect and reconnect communication wire connectors at indoor and outdoor PCBs.
Disconnect and reconnect communication wire connectors at indoor and outdoor PCBs.
CHECK
~10 min
4
Test Communication Wire Continuity
Use multimeter to verify continuity of all wires in the communication cable. ⚠️ Disconnect power before testing
Use multimeter to verify continuity of all wires in the communication cable. ⚠️ Disconnect power before testing
TEST
~15 min
5
Replace PCB if Needed
If wiring is good but error persists, suspect faulty PCB. Contact technician.
If wiring is good but error persists, suspect faulty PCB. Contact technician.
CHECK
~5 min
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