Midea MCA3U-18HRFNX-QRD0W Service Manual page 36

Indoor unit wiring diagram: 16022500004023
16022500004023
WIRING DIAGRAM
(INDOOR UNIT)
FUNCTION OF SWITCH
SWITCH FOR CCM UNIT ADDRESS
ON ON
0 0
S2
+
S1
1 2 1 2
8 8
0~15 16~31
ADDRESS
Factory
Setting
ON
0 ON 0
S2
+
S1
8 1 2 8 1 2
32~47 48~63
ADDRESS
Factory
Setting
0 0 0
8 8 8
20 32~35
26
FOR COOLING & HEATING
SW6
OR COOLING ONLY
SW7 SWITCH
SETTING
ON
ON ON
S TA T E
C O O L I N G & C O O L I N G
MO D E
H E A T I N G O N L Y
Fa c t o ry
Se t t i ng
FOR FAN MOTER Anti-cold air
SW2 SWITCH CONTROL THEN NO
POWER REQUEST.
SW1
FAN MOTOR STOP-TEM
ON ON
ON
ST A TE
ON
Factory setting
MO D E FA N OFF F A N O N
1 2
Factory
ON
Setting
1 2
FOR AUTO-RESTART
SW3
SWITCH
SETTING ON
ON
ON ON
1 2
S T A T E
According
ON
M O D E R E M E M B E R
N O_ RE ME M BE R to the
EEPROM
F a c t o r y
1 2
S e t t i n g
setting
0 0 0 0 0
8 8 8 8 8
36~53 54~71 72~90 91~105 106~140
SWITCH FOR TEMP.COMPENSATION SW5
ON ON
ON ON ON
STATE
STATE
1 2 1 2 1 2 1 2
2 E function
6 4
VALUE MODE
Factory Factory
Setting Setting

Inner Driver
TO WIRE
DC Motor
CONTROLLER
M
24
TO WIRE
CONTROLLER
Y/G MAGNETIC
RING
5
15
8
3
M
P5
CN15
DC MOTOR
Y/G
DRIVER MODLE
Outer Driver DC Motor
M 2
CN13
0 0
PUMP
2
8 8
CH
WATER LEVEL SWITCH
P3
141~160
161~200
BROWN BLACK
SWITCH FOR MODE-PRIOR SETTING
Y/G
ON ON
ON ON ON FAN1
1 2 1 2
1 2 1 2
COOL
HEAT HEAT COOL
Wiring Diagrams
NEWFAN
Alarm Remote
Output Control
5
DISPLAY
4
BOARD
JR6
10
CN10A
CN40
ON - OFF
ALARM
(CN10)
CN8
CN23
JR6
CN33
INDOOR UNIT
MAINBOARD
CN3
CN5
H
CN4
CN1 CN110
P2
E Y X
6
To CCM
Comm.Bus
MAGNETIC RING
CAP1
TO OUTDOOR UNIT

NOTE:
The wiring diagram
is for explanation
purpose only. The
M
actual shape of the
components may be
different.
Reactor
RED
RED
CN16
CN7
T2B
OUTER PIPE TEMP.
P4
4 T2
CN6
BLACK
P1
T1
CN14
ROOM TEMP.
WHITE
XP9
XS9
SWING
MOTOR
Y/G
POWER