York YEHJXH018BAMT-FX - 9. Maintenance; 9.1 Flashing LED of Indoor;Outdoor Unit and Primary Judgement

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Malfunction
of zero-cross
derection
U8
Off 3s
and blink
17 times
The complete unit stops
1.Power supply is
abnormal
2.Detection circuit of indoor
control mainboard is
abnormal
13
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