Hitachi RAS-25WX8 - Page 168

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Communication error. LD301 blinks 9 times.
Is the connecting cable
connected properly?
(Is 35V being output on the indoor unit side?)
Are CN3 and CN4
connected?
Is DC35V being output
between terminals C and D? Normal: DC32V – 39V
Is DC35V being output at
both ends of R35?
Connect CN 3 and CN4.
Connect properly.
Replace the power P.W.B. • Defective SW power supply
Replace the power P.W.B. • NF coils, IF coils, etc. may be broken.
Check the interface circuit
and replace the main P.W.B. if needed.
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No
No
No
No
No