AquaCal Heat Pump
E1 / LO
Low Refrigerant Pressure / Low Ambient
E2 / HI
High Refrigerant Pressure
FLO
Flow Switch / No Water Flow
E3
Defrost Mode Active
E5
Discharge Temperature Too High
E6
Suction Temperature Fault
E7
Compressor Overcurrent
E9
Low Ambient Shutdown
FS1 / FS2
Freeze Protection Active
No display / no power
No Power to Unit
Brand Neutrality
SplashLens is independent and is not affiliated with AquaCal. Content is written as original field-reference guidance and should be checked against current manufacturer documentation.