Hitachi RAS-25CNH1 Service Manual page 96

YES
Is switching power circuit normal?
Is 3A fuse normal?
YES
Operate the outdoor unit according
to the "Operation of the outdoor unit
indepndently".
What condition does the self-
disgnosis lamp indicate?
LD301: Blinking 10 times.
Half voltage error
LD301: Blinks 9 times.
Communications error
NO
Are cords for connecting terminal
board, reactor, diode, smoothing
capacitor, etc. connected correctly
YES
Is power circuit of compressor
normal? Refer to "Power circuit" for
details.
NO
Is DC 35V output at C and D termi-
nals? (DC 33V - 40V is output in the
normal state.)
Replace defective parts.
If 3A fuse has been blown, Q1,
switching transformer, ZD3, etc.
may be defective.
Securely insert them if loosened or
disconnected.