Hitachi RAS-25SX8 - Troubleshooting; Inspection Instructions

◯
d
◯
c
a
◯
◯
b
M
◯
a
◯
c
◯
b
◯
d
MODEL: RAS-25SX8, RAS-35SX8
M
Note that the 0 V line of the
outdoor electrical installation
and the primary power
circuit of the indoor
electrical installation 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.
A
B
TROUBLE SHOOTING
Warning
Warning
Power supply
Two-way valve coil
Indoor electrical installation
Indoor fan motor
Outdoor electrical installation
Power circuit
Compressor
motor
Power circuit
OV line
Control circuitControl circuit
Grounding
Voltage between each
part and ground
Grounding voltage
Potential at points
Potential
at points
310 V − 324 V
310 V
− 324 V
Do not under any
circumstances get your
hand or metal part into
contact with the cabinet.
Danger!!!
Do not install
a grounding.
Inspection instructions
– 214 –