HVACopediaMitsubishi heat pump error codes
17 codes with causes and test steps.
| Code | Meaning | Severity |
|---|---|---|
| E0 | Remote controller not receiving from indoor unit | Medium |
| E1 | Remote controller memory error | Low |
| E2 | Remote controller clock error | Low |
| E3 | Remote controller cannot transmit | Medium |
| E4 | Indoor unit not receiving from remote controller | Medium |
| E5 | Indoor unit cannot transmit to remote controller | Medium |
| E6 | Indoor/outdoor communication - indoor not receiving | High |
| E7 | Indoor unit transmit error to outdoor unit | High |
| P1 | Room (intake) air sensor TH1 open or shorted | Medium |
| P2 | Liquid pipe sensor TH2 open or shorted | Medium |
| P4 | Drain float switch disconnected | Medium |
| P5 | Drain overflow - float switch wet with pump running | High |
| P6 | Coil freeze or overheat protection | High |
| P8 | Pipe temperature out of range (coil not cooling or heating) | High |
| P9 | Coil sensor TH5 open or shorted | Medium |
| Fb | Indoor control board memory error | High |
| PA | Water leak detected | High |
Models covered
PEAD-RP100JAPEAD-RP100JALPEAD-RP125JAPEAD-RP125JALPEAD-RP140JAPEAD-RP140JALPEAD-RP35JAPEAD-RP35JALPEAD-RP50JAPEAD-RP50JALPEAD-RP60JAPEAD-RP60JALPEAD-RP71JAPEAD-RP71JAL
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.