Gree Vireo B 9 MBH - Fault Protection Procedures

34
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Service Manual
(6)Voltage sag protection
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(7)Communication fault
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(8)Module protection
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FRPSUHVVRUH[FHHGVWKH>W
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(9)Module overheating protection
1. Starting estimation:
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0RGXOH
>7
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LVDOORZHGWRVWDUWRWKHUZLVHLWVKRXOGQRWEHVWDUWHGDQGVKRXOGEHVWRSSHGWRWUHDWDFFRUGLQJWRWKHPRGXOHRYHUKHDWLQJSURWHFWLRQ7KH
PDFKLQHVKRXOGEHVWRSSHGRUWUDQVIHUUHGWRVXSSO\DLUWKHWURXEOHVKRXOGEHFOHDUHGLPPHGLDWHO\DQGWKHSURWHFWLRQWLPHVDUHQRWFRXQWHG
2. Frequency limited
,I>7
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@7
0RGXOH
>7
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3. Reducing frequency at normal speed and power turn-off:
,I>7
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@ 7
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>7
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4. Reducing frequency at high speed and power turn-off:
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@7
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>7
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5. Power turn-off:
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@7
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>7
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transferring also will not clear it).
(10)Compressor overloads protection
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(11)Phase current overcurrent protection of compressor
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steps:
1. Frequency limited
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2. Reducing Frequency
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@,3KDVH&XUUHQW>,
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3. Power turn-off
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Clearing Time of
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