E01
Panasonic E01 Error Code – Indoor/Outdoor Communication Failure
Air Conditioner · HIGH Severity
What This Error Means
Indoor/outdoor communication failure
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 min, restart.
Turn off at breaker, wait 5 min, restart.
RESET
~5 min
3
Check Internal/External Cable Connections
Inspect terminal block connections at both units.
Inspect terminal block connections at both units.
CHECK
~10 min
4
Refer to Detailed Diagnostics
Follow Panasonic detailed diagnostic procedure in service manual.
Follow Panasonic detailed diagnostic procedure in service manual.
CHECK
~20 min
5
Replace Indoor or Outdoor PCB
If wiring good, replace suspect PCB.
If wiring good, replace suspect PCB.
REPLACE
~30 min
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