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Code Error Corrective Action E081 Compressor Overload Protection, high load and high current draw on the compressor 1.Check power wiring, voltage may be down causing high current draw, make sure power does not get cut off in operation 2.Check piping for blockage and/or freeze up preventing flow in or out of the unit 3.Ensure all isolation valves are open & tank is completely filled 4.Check compressor wiring is connected to PCB 5.Check all the air is bled from the heat pump 6.Check if inlet or outlet temp, discharge sensor have fallen out of their wells 7.Check Expansion Valve Coil power connection and Coil Resistance should be 46Ω 1.Check power wiring, voltage may be high causing low current draw, make sure power does not get cut off during operation 2.Check piping for blockage and/or freeze up preventing flow in or out of the unit 3.Ensure all isolation valves are open & tank is completely filled 4.Check compressor wiring is connected to PCB 5.Check all the air is bled from the heat pump 6.Check if inlet or outlet temp, discharge sensor have fallen out of their wells 7.Check Expansion Valve Coil power connection and Coil Resistance should be 46Ω E082 Compressor Low Current Protection, low load and low current draw on the compressor 31PDF Image | Sanden SANCO2 Heat Pump Water Heater 2017
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