Rheem Pool Heat Pump Error Codes| Troubleshooting Rheem Pool Heat Pump Error Codes| Troubleshooting Rheem Pool Heat Pump Error Codes| Troubleshooting E0 probe 1 fault (control) E1 probe 2 fault (defrost) E2 check 3 fault (cond) IA External Alarm dor Door opened alarm Lo Low Temp. Alarm HI high temperature alarm EE unit parameter fault