Lennox MMA048S4

74
Inverter
r
Outdoor
r
PCB
18K/24K (Gas cooler)
CN3
Recfier, FRD,
IGBT andIPM
CN60
CN16
CN5
CN21
C
N
C
2
N
1
CN414 CN18
CN17
C
N
C
C
1
CN23
C
N
C
C
4
N
N
1
4
CN19
1
8
Port Descripon Voltage
CN23 Port fortestboard 5V/DC
CN414 Port forDCfan 0-310V/AC
CN17
Poweroutputfor condenser(T3),
ambient(T4)and discharge(Tp)
temperaturesensors
5V/DC
CN18 Poweroutputfor EEV 12V/DC
CN19 Poweroutputfor chassisheater 230V/AC
CN5Power output forACfan 230V/AC
CN16
Poweroutputfor compressor
heater
230V/AC
CN60 Poweroutputfor 4-wayvalve 230V/AC
CN3Portfor powercable (E,N,L,S)
CN21 Port forCompressor0-310V/AC
PCBCode: 17122000041117
W
W
IPM
W
W
W
W
W
W
W
W
V
V
V
V
V
V
V
V
V
V
U
U
N
N
P
P
IPMfor
DC Fan
C
F
W
W
W
W
W
V
V
U
U
Recfier
- L
L
N
N
N
N
+
+
FUSE
N
N
L
L
S
S
P
N
Figure 27. Typical Component Locations (MLB018S4S-1P)