Hitachi RAS-10JH4 - Structure of Indoor Unit Electric Parts; Removing Electrical Parts; How to Remove Control P.W.B.; How to Remove Indicating P.W.B. (Display)

TROUBLE SHOOTING
PRECAUTIONS FOR CHECKING
MODEL RAC-10JH4, RAC-14JH4
WARNING
WARNING
Always keep your hands
and metallic things away
from the cabinet.
DANGER!
Don't install
the ground
line.
When using an
oscilloscope, never
ground it.
Don't forget that high
voltage as noted in
the figure above may
apply to the
oscilloscope.
Remember that
voltage of 175 V is
applied to the 0V line
on the P.W.B. or the
like as shown in the
right diagram.
Indoor Controller
Outdoor C
ontroller
Power Switch
Point
400 F
I.P.M
Compressor
motor
Point
line
Control
P.W.B.
M
ain
P.W.B.
Voltage at point A
Ground voltage
Grounding
350V
Point B (0V
line)
Power
inlet
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