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E9 Water circulation pump error - Check the water is full fill in the Tank. - If the water circulation pump is not working, replace the pump. - Check the revolution of pump by controller. If the revolution is low, replace the pump. - Replace the main PCB E7 Fan motor locked - Remove foreign objects around the fan motor. - Check the fan motor connectors on the main PCB. - Replace the main PCB. F3 Discharged temperature error - Measure resistance of the discharged thermistor. - Replace the main PCB or heat pump. H0 High water outlet error - Check the water circuit is not flowing by air, dirt or scaling. - If the water circulation pump is not working, replace the pump. - Measure resistance of water outlet(outgoing) thermistor. - Replace the thermostat. - Replace the main PCB. FA High pressure side error - Check the heat pump piping for any blockage. - Check for any piping bend, blockage or kink. - Check if the pipes are frozen. - Ensure mains water supply is available. - Ensure all shut off valves are open. - If the water circulation pump is not working, replace the pump. - In areas with hard water ensure Gas Cooler is not scaled up, descale if necessary. - Replace the main PCB or heat pump. H3 Pressure switch error - Check the thermistor connectors on the main PCB or control PCB in the heat pump unit for any disconnect, fall-off, wire breakage or short circuit. - Replace the main PCB. Note: 1. Afteracomponentisreplacedortheinspectioniscompleted,turnthebreakerOFFfor a period of 3 minutes before restarting to confirm the error does not re-occur. 2. Ifthecorrectiveactionsabovedonotsolvetheerrorproblem,amalfunctionofthePCB is highly likely. Water Supply Quality (Supplemental) Chloride and PH In areas with a high concentration of chloride in the water, that water can cause corrosion and subsequent failures. Where the chloride level exceeds 0.1 ounces per gallons (200 mg/litre), the warranty is no longer valid on to the heat pump unit and tank unit. PH is a measure of whether the water is alkaline or acid. In an acidic water supply, the SANCO2 Heat Pump – Installation Manual Page 28 of 44 water can attack the parts and cause them to fail.PDF Image | SANCO2 Heat Pump Water Heater R744
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