Grundig GHP-MM08, Руководство по обслуживанию

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69 / EN
Heat Pump Monobloc Inverter / User Manual
67 Heat Pump Space Heater 202202
4.4.19.6 E18 E23 E29 E30 Diagnosis and analysis
4.4.19.6.1 Diagnosis
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Code E18 will occur when IPM module is abnormal.
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Code E23 will occur when the instantaneous peak current of any phase of three phases the
compressor U, V and W is over high.
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Code E29 will occur when the internal circuit of IPM detecting temperature is abnormal.
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Code E30 will occur when IPM module overheats.
4.4.19.6.2 Possible cause
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The compressor phase sequence is incorrectly connected.
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Too much refrigerant liquid flooded into the compressor.
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The compressor malfunctioned.
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Screws on the inverter module are loose.
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The radiator on inverter module PCB has poor heat dissipation.
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The inverter module PCB malfunctioned.