– 74 –
3. Power Module Circuit
●
Fig. 3-1 shows the system power module and its peripheral circuit.
The three transistors on the positive
e
side are called the upper arm, and the three transistors on the negative
d
side, the lower arm.
+
W
U
V
W
W
–
+
V
V
–
+
U
U
–
A
+
DC
Compressor
motor
U coil
V coil
W coil
System P
o
w
e
r module 2
+
–
C501
+
–
C502
+
–
C503
R24
0.35
m
H
P
o
w
e
r rela
y
Coil
R007
R008
Inr
u
sh current
protection
rela
y
C006
R001
Noise filter
coil
L
N
T
e
rm
inal
board
FUSE (25A)
Fig. 3-1 Power module circuit (U
+
is ON, V
–
is ON)
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 ...
