Hayward Spa Heaters Owners Manual - Page 20

Meaning of Display Codes Service Analyzer Codes Most problems will be detected by the service analyzer and a code will be displayed on the digital display of your heater. Display Meaning of codes OFF The desired programmed temperature point is lower than 60°F (15°C). LP & LP3 Shortage of refrigerant gas in the unit or faulty low pressure control. The digital display will show LP3 after 3 LP faults and shut down your pool heater. The pool pump will also be stopped for protection if the unit's internal time clock feature is used. If LP or LP3 occurs you should call for service. HP & HP3 Low water flow to the unit or faulty high pressure control. Check water flow. Backwash filter and/or heater. The unit will show HP3 after 3 HP faults. This will stop your heater for protection. Po Water temperature probe connected to WS on the electronic board may be disconnected. If it is not, the probe may be open or defective. Pc Water temperature probe is short circuited or may be defective. FLo Possible causes: - The filter is in backwash position. - The filter pump is stopped. - The filter is dirty. - Shortage of water to pool pump. - Water pressure switch must be adjusted or it is broken. dPo Suction temperature probe connected to DS on the electronic board may be disconnected. If it is not, the probe may be open or defective. dPc Suction temperature probe is short circuited or may be defective. FS Unit currently in defrosting cycle (the fan works but the compressor is stopped). This is normal operation when outside temperatures are cold. 18 Owner's manual