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Heat Pumps Covered by This Guide HeatPro HP50TA, HP20654T, HP20654BT, HP20654TC, HP20854T, HP20854BT, HP20854TC, HP21104T, HP21104TC, HP21404T Note: HP50TA, and HP21404T heat pumps while labeled as HeatPro, are built on the Summit platform. Use Summit wiring diagrams, and error codes in your diagnostics Summit/ HeatMaster/ EnergyTherm/ EasyTemp SUM25TA, SUM3TA, SUM3TAC, SUM4TA, SUM4TAC, SUM5TA, SUM5TAC SUM8TA, HML50TA, HML65TA, HML65TAC, HML80TA, HML80TAC, HML110TA...
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Table of Contents Important Safety Information HeatPro Parts Diagram Basic Operation of Heat Pump HeatPro Parts List Normal Operation of Heat Pump Summit/EasyTemp/HeatMaster Parts Diagram Setting Heat Pumps for Remote Operation Summit/EasyTemp/HeatMaster Parts List Common Error Codes LP HeatPro Wiring Diagram Common Error Codes HI/HP Summit/EasyTemp/HeatMaster Wiring Diagram Common Error Codes PO/OP...
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Safety Warning! The following heat pump Troubleshooting Guide is to be used in diagnosing and repairing Hayward & Summit branded pool heat pump systems containing R-410A refrigerant . They are not intended for use with any other manufacturers heat pumps.
Hayward Heat Pro units have a 5 minute delay during which no operation will occur. Summit brand units have a 3 minute delay, but the fan will come on immediately once the heat pump is turned on and the thermostat raised to a setpoint above the pool temp.
Normal Operation of Heat Pump All of the heat pumps covered in this guide are charged with R-410A refrigerant If you have a system that is charged with R-22 refrigerant, and require assistance call our Technical Support Department at 908-355-7995 Normal Refrigerant Operating Pressures Low side 125-135psi...
Normal Operation of Heat Pump Water In and Around Heat Pump The heat pump evaporator coil (the surrounding coil) condenses moisture out out of the surrounding air. As much as 3-5 gallons per hour of run time is common in higher humidity areas. This is normal and in fact increases the efficiency of the heat pump.
Setting Heat Pumps for Remote Operation Heat Pro Heat Pumps For 2 wire remotes such as Hayward’s Pro-Logic, attach the 2 low voltage wires from remote to terminals 1 and 2 on terminal block TB201. Set heat pump to standby mode (three red dots scrolling across screen). Heat pump is now ready for remote operation.
Setting Heat Pumps for Remote Operation Summit Platform Heat Pumps Attach 2 wires from remote to terminals marked ‘P’ and ‘S’ on the lower right corner of the control board. Set Pool temperature to off. Set Spa temperature to ‘104’. Press and hold ‘Set/Select’ button until ‘Loc’ appears.
Common Error Codes LP on Display LP is an indication the low pressure switch is open. The switch opens when the refrigerant pressure drops below 80PSI, and will automatically reset at 120PSI. Sustained ambient temperatures below 21⁰F will cause the LP error, however once the ambient temperature rises above 40⁰F the switch will close automatically.
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Common Error Codes HP/HI on Display HP or HI is an indication the high pressure switch is open. The switch opens when the refrigerant pressure rises above 590PSI, and will automatically reset at 440PSI.. HeatPro Display Troubleshooting HP/HI The most common cause of HP or HI error code is restricted water flow. An open bypass valve that allows the heat exchanger to be pressurized, but does not allow flow through it is a likely culprit.
Common Error Codes PO/OP on Display PO or OP is an indication of an open water temperature sensor. Summit style heat pumps use a 4.8k ohm sensor, and HeatPro heat pumps use a 10k ohm sensor. HeatPro Display Troubleshooting PO/OP Summit Display The most common cause of PO or OP error code is an open water temperature sensor.
Common Error Codes dPO/cOP on Display dPO or cOP is an indication of an open defrost temperature sensor. Summit style heat pumps use a 4.8k ohm sensor, and HeatPro heat pumps use a 10k ohm sensor.. HeatPro Display Troubleshooting dPO/cOP Summit Display The most common cause of dPO or cOP error code is an open defrost temperature sensor.
Temperature/Resistance Charts For use with Summit Heat Pumps For use with HeatPro Heat Pumps Using Temp/Resistance Charts 4.8 K ohm Sensor Temperature / Resistance Chart Determine correct temperature of air or 10K ohm Sensor Temperature / Resistance Chart water using accurate thermometer. Set Temperature °F Temperature °C Sensor resistance (Kohm)
Common Error Codes Flo/PS on Display Flo or PS on the display is an indication of an open water pressure switch. Though water pressure switches occasionally fail, the majority of Flo/PS errors are water flow related. Confirm that pump is running and filter is clean before proceeding with any further troubleshooting.
Common Error Codes Blank Display A blank display is an indication of no low voltage to control. A tripped breaker is a likely cause. On HeatPro models a blown 1 amp fuse will result in a blank display Troubleshooting a Blank Display HeatPro Display Check for 240 volts to contactor at L1 and L2 terminals.
Common Error Codes FS/deF on Display FS or deF on the display is an indication that the heat pump is in the defrost mode. If outdoor ambient temperatures are low to mid 50’s or below this is normal operation Troubleshooting FS/deF HeatPro Display Normal display when heat pump is in defrost mode.
Hot Gas Bypass (HGBP) designated by a C at end of model number A. Liquid line to TXV B. Hot gas line to HGBP is tee’d into the hot gas line going to the condenser. C. Hot gas line from HGBP is tee’d into liquid line downstream of TXV D.
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HeatPro Exploded View Note: HP50TA built on Summit platform. Use SUM25TA parts list HP21404T built on Summit platform. Use SUM8TA parts list...
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Summit/EnergyTherm/HeatMaster/EasyTemp Setup Menu PRESS AND HOLD SET BUTTON 5 SECONDS Release SET button and press up arrow until 50 appears This will unlock settings menu. Press SET again Sets heat pump to operate only in P_S-POOL_SPA pool or spa mode , or in both modes Combination Key Functions Set high pool limit 61-95 F...
Heat Pump Specifications Description HeatPro Specifications Model number HP50TA* HP20654T HP20854T HP21104T HP21404T* Refrigerant Type R-410A R-410A R-410A R-410A R-410A Factory Charge 3 lbs. 0 oz. 3 lbs. 14 oz. 4 lbs. 2 oz 5 lbs. 6 oz. 5 LBS. 13.5 OZ. Factory Test Pressure 440 psig 441 psig...
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Flow Chart PS/FLo Water flow issue. Heater requires a minimum flow of 30 GPM. The water pressure switch is not PS/FLo sensing pressure. Is filter pump on and filter clean? Bypass closed? Check continuity Turn on filter (ohms reading) pump or clean of pressure switch.
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Flow Chart HI/HP HI(HP) Does heat pump run for a See notes 1 and 2 below short time, then cut off showing Hi or HP? Check Ohm’s reading on HP switch. Replace HP switch. Reading 0 Ohms? Check all wires and Replace control board connections from HP switch to...
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OP/PO – SH/Pc Flow Chart OP/PO SH/Pc Check for loose wires from water Check for shorted wires from temperature sensor to control water temperature sensor to board or interface board control board or interface board Wiring OK? Water Sensor failure. Wiring OK? Check sensor with values in Chart pg.
Flow Chart Heat pump runs for a few seconds Heat pump does not run shows LP Then shows LP Ambient Temp above 40⁰ F? Temp. too low. Does fan come on when heat pump runs? Allow temp. to Attach gauges to heat pump warm to 50⁰...
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Big Blue to detect leaks. The maximum pressure you can use in this method is on the data plate of all heat pumps. This is the pressure Hayward pressurizes the system to during manufacture. The majority of leaks can be found using one or both of these methods.
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