Koppel ac error code e1?

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Rupert 

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Nov 27, 2025
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How do i repair E1 error code,actually we replaced new communication control, but it doesnt work, we replaced also capacitor but it doesnt work also.. is it possible that the main board of outdoor unit is the big problem please send me advice how to resolve this E1 error code.
 
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admin 

Kurucu
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Nov 20, 2025
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10
Rupert said:
How do i repair E1 error code,actually we replaced new communication control, but it doesnt work, we replaced also capacitor but it doesnt work also.. is it possible that the main board of outdoor unit is the big problem please send me advice how to resolve this E1 error code.
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Koppel AC E1 means indoor–outdoor communication failure. Check L–N–S wiring, tighten terminals, inspect broken cables, correct voltage, and test outdoor PCB. Faulty main board can also cause E1.
 
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