Hitachi RAM-35QH5, Service Manual

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< Reference >
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When stop operation with LD301 blinks 12 times, it may be a DC Fan Motor broken.
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In this case, please check CN30 and CN31 connection first. It makes Fan Motor Lock also if those
connectors are in misconnection.
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If 2A Fuse was burned it is possible that the DC Fan Motor may be damaged too.
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DC Fan Motor has broken when 2A Fuse was burned. Please replase both DC Fan Motor and 2A Fuse
together.
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Fan lock detecting system may be actidiated when something has disturb the Fan rotation by inserting
materials into propeller fan or ice has growing inside of outdoor unit by snowing.
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Fan lock detecting system may be actidiated by strong wind (ex. 17m/sec or above) against the Fan
rotation. In this case, unit will be restart again after a while.
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Fan lock detecting system may be actidiated even though the DC Fan Motor is rotating correctly, the
possible cause is due to Motor problem or PQ102 on board or control board problem.
< Caution >
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Please take precaution while servicing Fan Motor circuit, because it carries DC330~360V supply.
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It is impossible to troubleshoot the Fan Motor because its circuit is integrated and conceal in the Fan
Motor.