AquaCal Heat Pump DIY Troubleshooting Guide
✅ TRY THESE FIRST
✅ Make sure the pool circulation pump is running
✅Set circulation pump to run continuously to heat a cold pool
✅ Clean or backwash the filter, for flow or HP errors
✅ Empty skimmer and pump basket, for flow or HP errors
✅ Verify all valves are in the correct position and flow is not bypassing Heat Pump
✅ Turn the heat pump breaker OFF for 10 seconds, then back ON
Common Problems
Problem | What To Check | Try This ✅ | Submit Service Request on Customer Portal 🔧 |
Won't turn on | Breaker, display, pump | ✅ Reset breaker | 🔧 Blank display or breaker keeps tripping |
Won't heat | Temp setting, filter, flow | ✅Raise temperature, extend run time, check for cold air discharge | 🔧 Water never warms |
FLO error | Water flow | ✅ Clean filter and baskets | 🔧 FLO remains |
HP error |
| ✅ Clean filter baskets and strainer. Increase pump speed | 🔧 Error returns |
Water too hot | Settings, other heaters | ✅ Lower set point | 🔧 Error repeats |
Heating slowly | Weather, cover | ✅ Increase run time/use cover | 🔧 Performance suddenly drops |
Repeated shutdowns | Error code | ✅ Reset unit | 🔧 Same error returns |
Breaker trips | Electrical supply | ⚠️ Reset once | 🔧 Trips again |
Common Error Codes
Code | Meaning | Action |
FLO | Low water flow | ✅ Clean filter, baskets, verify pump |
HP | High pressure | ✅ Check airflow and clean coil |
LP | Low pressure | 🔧 Contact service |
HP5 | High pressure lockout | 🔧 Contact service |
LP5 | Low pressure lockout | 🔧 Contact service |
High Water Temp | Water too hot | ✅ Lower set point |
Sensor Errors / OTA | Internal sensor issue | 🔧 Contact service |
Communication Errors | Control issue | 🔧 Contact service |
⚠️ Login to the Portal > Register Your Product > Submit Service Request
🔧 Breaker repeatedly trips
🔧 HP5 or LP5 errors
🔧 Sensor errors
🔧 Refrigerant-related errors
🔧 Electrical or communication errors
🔧 Burning smell or smoke
🔧 Water inside electrical compartments