Grundig GHP-MM08, Service Manual

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Heat Pump Monobloc Inverter / User Manual
51 Heat Pump Space Heater 202202
4.4.10 P10 diagnosis and analysis
4.4.10.1 Diagnosis
After heat pump run for one minute in cooling mode, if the pressure detected by LPS is
below 0.7MPa for 2 minutes, heat pump will shut down and the interface will display the code
P10. In ten minutes heat pump will be allowed to start again. If Code P10 occurred for three
times within one hour, heat pump will shut down. A manual power-off must be done before next
restart.
4.4.10.2 Possible causes
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The system is lack of refrigerant.
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There is the blockage on low pressure side of the refrigerant system.
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There is a poor heat transfer on low pressure side of the refrigerant system.
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Water flow rate is insufficient.
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LPS is faulty.
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Refrigerant system PCB is damaged.