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TheAChub
Code Text Description Cause Check Procedure Technical Support Notes 1302 High Pressure fault. High pressure switch (63H) or High Pressure sensor (63Hs) activated.
-R410a system trips at 41.5 bar
-R407c system trips at 30 bar
High pressure faults are commonly caused by a blocked condenser coil, faulty fan motor, a restriction of airflow on indoor units in heating mode or a blockage/restriction in the pipework. Check outdoor fan operates correctly, ensure no restriction of airflow across indoor/outdoor coils such as clogged filters. Use the testing dip switches in the app to check system running pressures/temperatures – This may help highlight any blockages or restrictions in the refrigerant circuit such as faulty solenoid valves or check valves stuck closed. If the you reset the unit and the fault generates straight away (without running) then the high pressure switch or sensor may be at fault. Measure the switch for continuity (normally closed) and use the dip switches to check the pressure sensor reading against your gauge pressure.
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