40MBAB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
WIRING DIAGRAMS
Fig. 15 — Wiring Diagram Sizes 18K/24K/30K/36K - Non Light-Commercial Models
Table 3 — Wiring Diagram Sizes 18K/24K/30K/36K - Non Light-Commercial Models
INDOOR UNIT
MAINBOARD
Y/ G
Cn1 8
CN2
3
Alarm
CN3
3
work
6
Cn1
0
CN
5
WATER LEVEL
CN4 6
T1
ECM
Cn15
M
4(3)
3
Cn34
CN4 3
UVLE D
Output
BLU E
RE D
RE D
TRAN S
CN2
2
RE D
CN
9
J1
CN2 9
T2
Cn1 2
3
HEA
TER
2
CN1 1
L1 L2
RE
D
BLAC
K
TO OUTDOOR UNIT
OR POWER
2
N
L
L and N :230VAC
SWITCH
Output:5VDC
Output:24VAC
Output:5VDC
Output:5VDC
Output:220V
AC
Output:12VDC
Output:24VAC
Output:15VDC
Output:220V
AC
Output:24V
AC
JR 1
CN
5
CN
4
Cn
1
CN 2
ON/OF F
Remot e
Contro l
CN 6
CN 9
CN1 0
CN1 1
CN 7
2 WIR
E WIR
E
CONTROLLE
R
CN1 4
4
48
5 POR
T
CN 3
E Y X
To CC M
Comm.Bu s
Output:24V
AC
Output:24V
AC
15VDC
12VDC
15VDC
12VDC
5VDC
Output:24VAC Output:24VAC Output:24VAC Output:24VAC
Y/
G
DRY CONTACT
DRY CONTACT
T2
B
T2
A
CN6
CN
21
Output:5VDC
2
2
Output:12VDC
S1 S2
CN2 0
COMMUNICATION
TO OUTDOOR UNIT
W1
DH
R C L
G Y1 Y/Y
2
B W
W2
E/AU
X
24V THERMOSTAT
CODE
PART NAME
ECM
Indoor ECM Motor
T1
Room Temperature
T2
Coil Temperature Sensor
T2A
Indoor Coil Inlet Temperature Sensor
T2B
Indoor Coil Outlet Temperature Sensor