3HS41-SAR , 3HS01-SAR :LEDOM
Note that the 0 V line of the
outdoor electrical parts and
the primary power circuit of
the indoor electrical parts
have voltages to ground as
illustrated in the right-hand
figure.
When conducting a check
with an oscilloscope or
something similar, do not
ground the oscilloscope.
Note that the oscilloscope
will be subjected to voltages
as illustrated in the figure
above.
TROUBLE SHOOTING
Warning
Warning
Power supply
Power circuit
Control circuit
Control circuit
Do not under any
circumstances get your
hand or metal part into
contact with the cabinet.
Danger!!!
Do not install
a grounding.
Inspection instructions
– 108 –
M
140V
140V
M
d
c
f
e
b
c
a
e
b
d
a
f
Two-way valve coil
Indoor fan motor
Outdoor electrical parts
Indoor
electrical
parts
Grounding
0V line
Relay
Power circuit
Compressor
motor
Voltage between each
part and ground
Grounding voltage
Potential at
points
Potential at
points
Potential at
points
Potential at points
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