Mmda Indoor Units - Lennox MPA009S4S Service Manual

12.4. MMDA Indoor Units

Figure 36. MMDA009S4-1P, MMDA012S4-1P, MMDAA018S4-1P Ducted Units Wiring Diagram
3
Alarm
M
CN3
Output
FAN CN13
5
ALA RM
CN15
CN33
INDOOR UNIT
MAINBOARD
CN9
CN3
E Y X
Y/G
RED
To CCM
Comm.Bus
Remote
Control
RED
CN8
ON/OFF
CN18
CN23
2 M
CN13
PUMP
10
DISPLAY
CN10
BOARD
4
BLACK
CN6
INDOOR COIL TEMP. SENSOR
WHITE
WATER LEVEL SWITCH
CN5
YELLOW
BLACK
BLACK
RED
1
FILT ER- B OA RD
70
5 TO WIRE
CONTROLLER
T2
T1
ROOM TEMP. SENSOR
Y/G
2 3