"HP5" Indicator . Heat Pump has locked out due to five HP (high-pressure) faults during one call for heating or cooling. "LP" Indicator . Refrigerant system's low-pressure switch is open. Valves in incorrect position. Water Pressure . Switch incorrectly calibrated . Defective low- pressure switch or wiring . Low refrigerant charge.. hp5 system lockout. hpc system lockout low pressure fault ®.. ®. lp5 system lockout. multi-unit comm fault.. ota system lockout " smart comm fault variable drive fault water temp sensor short or water temp sensor open.
High Pressure Errors (HighPressure, HP5 Lockout): These codes show that the refrigerant system is under high pressure. Common causes include clogged filters or restricted water flow. Make sure the filters are clean, and if needed, increase the pump speed to improve flow.. Medallion Energy 3055 Tech Park Way Deland, FL 32724 407-786-0000. Hours Mon-Fri: 8am - 7pm Saturday: 9am - 5pm Sunday: By Appointment