| Alarm Code | E20 |
|---|
| Alarm meaning |
No indoor units at automatic address setting. |
| Alarm conditions |
When automatic address setting was performed, no indoor units were recognized. |
| Probable cause |
- The inter-unit control wiring from the outdoor unit to the indoor units has been cut.
- Serial connector 1 (CN001) is disconnected at the outdoor unit.
- The power is OFF at all indoor units in the system.
|
| Check |
- Check whether the inter-unit control wiring from the outdoor unit to the indoor units is cut.
- Check whether serial connector 1 (CN001) is disconnected at the outdoor unit.
- Check the power at the indoor units.
|
| Correction |
- Reconnect the inter-unit control wire from the outdoor unit to the indoor unit.
|
| Example |
– |
| Notes |
Position of serial connector CN001 on 2WAY
 |
