– 96 –
TROUBLE SHOOTING
Model
RAK-25NH4 / RAC-25NH4
RAK-35NH4 / RAC-35NH4
RAK-50NH4 / RAC-50NH4
PRECAUTIONS FOR CHECKING
Power source
+
~
+
–
~
A
CT Module
+
–
+
–
N
C
D
L
Compressor motor
System power module 2
Indoor unit
electric parts
Control
P.W.B.
DC35V
0V
(0V)
MAIN P.W.B.
P
o
w
er module
a
b
M
1. Remember that the
0V line is biased to
155-170V in
reference to the
ground level.
2. Also note that it takes
about 10 minutes
until the voltage fall
after the power switch
is turned off.
DANGER
Across a – b (0V line)....................
Across a – ground..........................
Across b (0V line)– ground............
approx 260-360V
approx 155-170V
approx 155-170V
When using an
oscilloscope, never
ground it. Don't forget
that high voltages as
noted above may
apply to the
oscilloscope.
DANGER
Always keep your hands
and metallic things away
from the enclosure of the
oscilloscope.
DANGER!
Don’t install
the ground
line.
Oscilloscope
Outdoor unit P.W.B.
Summary of Contents for RAC25NH4
Page 37: ...CIRCUIT DIAGRAM MODEL RAK 25NH4 RAK 35NH4 RAK 50NH4 37 ...
Page 38: ...CIRCUIT DIAGRAM MODEL RAC 25NH4 RAC 35NH4 RAC 50NH4 39 ...
Page 40: ... 42 MODEL RAC 25NH4 RAC 35NH4 RAC 50NH4 MAIN P W B Marking on P W B COMPONENT SIDE ...
Page 90: ... 100 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 25NH4 RAC 35NH4 RAC 50NH4 ...
