Hitachi RAS-E10H2 - TROUBLESHOOTING GUIDE; Precautions for Checking

TROUBLE SHOOTING
PRECAUTIONS FOR CHECKING
MODEL RAC-E10H2
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
O
utdoor
C
ontro
ller
Po
w
er
S
w
itc
h
Point
400
F
I.P.M
Co
m
pressor
motor
P
oint
line
Control
P.
W
.B
.
Main P.W.B.
V
oltage at point
A
G
round voltage
Grounding
350V
P
oint
B (0V
line)
Power
inlet
WARNING
Do not use a soldering iron with
transformer: Otherwise, thermal fuse
inside transformer will be blown.
LEAD WIRE
SOLDERING IRON (30 TO 75W)
- 70
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