HVACopediaICP heat pump error codes
11 codes with causes and test steps, plus 1 settings tables.
| Code | Meaning | Severity |
|---|---|---|
| 1 | Long run time | Medium |
| 2 | System pressure trip | High |
| 3 | Short cycling | Medium |
| 4 | Locked rotor | High |
| 5 | Open circuit | High |
| 6 | Open start circuit | High |
| 7 | Open run circuit | High |
| 8 | Welded contactor | Critical |
| 9 | Low voltage | Medium |
| Red TRIP LED | Comfort Alert TRIP - Y1 call but compressor not running | High |
| TRIP + ALERT flashing together | Control voltage too low | Medium |
Settings and specs
Outdoor unit clearances
Clearances · ICP N4H3 Heat Pump
| Location | Minimum |
|---|---|
| Above unit (discharge) | 48 in. (1.2 m) |
| Each coil side (intake) | 18 in. (457 mm) |
| One coil side, reduced (unit to structure) | 6 in. (152 mm) |
| Control box corner and service panel | 24 in. (610 mm) |
| Between side-by-side units | 18 in. (457 mm) |
| Roof overhang above unit (with gutters) | 48 in. (1.2 m) vertical |
- Small objects (post, fence end): clearance about equal to the object width.
- Do not install under an overhang without gutters.
Source: ICP N4H3 Installation Instructions 428 01 5103 02, Clearances, PDF p.3 (printed p.2)
Models covered
N4H3
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.