Error Code E1 / EL 01 (EL01)Updated a year ago
Error Code E1 / EL 01 (EL01) Troubleshooting
Indoor/Outdoor Unit Communication Error Diagnosis and Solution
Scope of Models Covered:
Single-Zone Mini Split Systems | Multi-Zone and Light Commercial Mini Split Systems |
| YN009AMFI20RPD / WS009AMFI20HLD | YN020GMFI22M2E |
| YN009GMFI20RPD / WS009GMFI20HLD | YN030GMFI22M3E |
| YN012AMFI20RPD / WS012AMFI20HLD | YN040GMFI22M4E |
| YN012GMFI20RPD / WS012GMFI20HLD | YN050GMFI22M5E |
| YN018GMFI20RPD / WS018GMFI20HLD | CB009GMFILCFHD / CB012GMFILCFHD / CB018GMFILCFHD / CB024GMFILCFHD |
| YN024GMFI20RPD / WS024GMFI20HLD | RB009GMFILDFHD / RB012GMFILDFHD / RB018GMFILDFHD / RB024GMFILDFHD |
| YN030GMFI20RPD / WS030GMFI20HLD | FB012GMFILDFHE / UB018GMFILCFHD / UB024GMFILCFHD |
| YN036GMFI20RPD / WS036GMFI20HLD | WS009GMFI22HLE / WS012GMFI22HLE / WS018GMFI22HLE / WS024GMFI22HLE |
| YN009AMFI22RPE / WS009AMFI22HLE YN012AMFI22RPE / WS012AMFI22HLE | YN009GMFI22RPE / YN012GMFI22RPE / YN018GMFI22RPE / YN024GMFI22RPE |
This error indicates that the indoor unit and outdoor unit cannot successfully communicate. If this is a new or recent installation, check each of the communication cables carefully, and tug on each wire (there are a total of 8 wire ends, 4 on the indoor terminal block and 4 on the outdoor terminal block) to make sure they are fastened securely. Sometimes, cutting off the terminated spade head and attaching bare copper will eliminate this error. Check if the copper is making good contact with the connector spades or lugs.
For systems that have previously ran for some time, follow the diagnostic procedure below.