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Identifies issues with incorrect incoming phase sequence for 3-phase heat pumps and provides actions to reset phases.
Troubleshooting steps for an operating pressure switch that fails to close, including checks and replacement.
Diagnosing and rectifying low refrigerant issues in the HP cooling circuit, including leak tracing and oil checks.
Troubleshooting a blocked strainer in the heating system return line, with instructions to shut off and clean.
Diagnosing a defective or jammed circulation pump, covering voltage checks, wiring, jamming, cleaning, and replacement.
Troubleshooting a blocked strainer in the brine circuit, with instructions to check and clean.
Diagnosing defective or jammed circulation pumps in the brine circuit, including signal checks.
Diagnosing motor protection alarms due to phase drop or blown fuses, checking supply and connections.
Troubleshooting motor protection alarms caused by a defective soft start module, including bypassing and replacement.
Diagnosing defective compressors by checking ampere levels, temperatures, and internal resistance.
Troubleshooting circulation pump alarms, including air, jamming, signal checks, and replacement.
Troubleshooting brine circulation pump alarms, covering air, jamming, signal checks, and replacement.
Troubleshooting brine alarms, focusing on set values and brine sensor readings.
Diagnosing sensor issues by measuring resistance, checking values against a table, and calibrating or replacing.
Troubleshooting communication failures between display, control, and relay cards.
Troubleshooting auxiliary heater alarms related to phase drop, checking voltage and protection.
Addressing auxiliary heater alarms when the overheat protection has tripped, with reset and replacement steps.
Diagnosing compressor running backwards due to incorrect phase sequence in 3-phase systems.
Diagnosing defective 3-way valve motors, checking limit positions and voltage supply.
Adjusting house heating comfort by checking and modifying ROOM, CURVE, and MIN settings.
Troubleshooting defective Honeywell 3-way valves, checking motor function and voltage.
Diagnosing defective LK 3-way valve armatures, checking motor function and voltage.
Troubleshooting defective G2 shunt (HGW) by checking function and voltage, with replacement options.
Performing the basic setting for the G2 shunt and motor, including reset and adjustment procedures.
Ensuring the heat pump operates in auto mode rather than solely on additional heat.
Troubleshooting compressor shutdown due to an active alarm, referring to installation instructions.
Troubleshooting heat pump shutdowns due to high return temperatures, checking MAX RETURN and sensors.
Addressing compressors running backwards in 3-phase systems due to incorrect phase sequence.
General