Carrier 42QHC018DS Air Conditioner Error Codes
42QHC018DS Error Code Reference
Section titled “42QHC018DS Error Code Reference”Carrier 42QHC-series 18000 BTU inverter split AC, R410A
| Error Code | Fault Description |
|---|---|
| E2 | Indoor room thermistor fault |
| E3 | Indoor coil thermistor fault |
| E6 | Communication fault — indoor to outdoor |
| E7 | Outdoor fan motor fault |
| HP | High pressure protection |
| LP | Low pressure protection |