Cooper & Hunter Error Codes
Every Cooper & Hunter error code we have catalogued, with what it means on site — 33 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.
Common Cooper & Hunter codes
- E0 — Starting voltage exceeds limits
- E1 — Compressor high pressure protection
- E2 — Indoor unit freezing protection
- E3 — Low pressure protection threshold
- E4 — Injection tube high temp protection
- E5 — Compressor overcurrent protection
- E6 — Communication / power cable error
- E7 — Mode mismatch (indoor vs outdoor)
| Code | What it means |
|---|---|
| E0 | Starting voltage exceeds limits |
| E1 | Compressor high pressure protection |
| E2 | Indoor unit freezing protection |
| E3 | Low pressure protection threshold |
| E4 | Injection tube high temp protection |
| E5 | Compressor overcurrent protection |
| E6 | Communication / power cable error |
| E7 | Mode mismatch (indoor vs outdoor) |
| E8 | Evaporator overheating |
| E9 | Cold air supply protection |
| F0 | Discharge sensor malfunction |
| F1 | Evaporator temperature sensor malfunction |
| F2 | Condenser temperature sensor malfunction |
| F3 | Air temperature sensor malfunction |
| F4 | Supercharger temperature sensor malfunction |
| F5 | Compressor discharge tube sensor malfunction |
| F6 | Condenser overload/overheating |
| F7 | Insufficient compressor crankcase lubrication |
| F8 | Compressor overload |
| F9 | Compressor overload / low fan speed |
| FF | Phase missing or phase monitor issue |
| FA | Condenser / evaporator overheating |
| FH | Evaporator freezing / ice on coils |
| H0 | Overheating protection mode |
| H1 | Condenser defrost mode (normal) |
| H2 | Electrostatic filter failure |
| H3 | Compressor temp rise / motor locked |
| H4 | System error (one-time) |
| H5 | IPM inverter unit protection |
| H6 | Sensor defect / fan motor feedback loss |
| H7 | Compressor failure |
| H8 | Drainage system full / tray overflow |
| H9 | Electric heater failure (indoor) |
Official Cooper & Hunter source / manual ↗
Frequently asked
What does Cooper & Hunter error code E0 mean?
Cooper & Hunter error code E0 means: Starting voltage exceeds limits. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E1 mean?
Cooper & Hunter error code E1 means: Compressor high pressure protection. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E2 mean?
Cooper & Hunter error code E2 means: Indoor unit freezing protection. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E3 mean?
Cooper & Hunter error code E3 means: Low pressure protection threshold. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E4 mean?
Cooper & Hunter error code E4 means: Injection tube high temp protection. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E5 mean?
Cooper & Hunter error code E5 means: Compressor overcurrent protection. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E6 mean?
Cooper & Hunter error code E6 means: Communication / power cable error. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Cooper & Hunter error code E7 mean?
Cooper & Hunter error code E7 means: Mode mismatch (indoor vs outdoor). In R-Pro you also get the likely causes and the inspection steps — offline.
Look up any error code — offline — in R-Pro.
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