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8-8) BLDC Motor Operation Circuit Part
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7D703 2702 D7
a In case Fan Motor is locked, therefore, when Fan Motor is constrained to less than
about 600rpm in order to prevent over-current to the power source group, PIN #39,
#38 and #37 sense it so that they can stop Fan Motor operation.
If Fan Motor operation is stopped by this function, it becomes to re-operate every 10
second. If Motor Connector is separated under the state where the power source is
applied during service, Micom recognizes it as Fan Mctor is constrained so ihat
Micom can stop Motor. Then Motor resumes to operate afier 10 seconds.
However, there are a part of products which re-operate every aboui 5 minute among
the products which were manufactured in February and March.
Therefore, when the product is completely repaired, confirm the repaired state with
power-ON again after power-OF F if possible.
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