Midea MCA3U-18HRFNX-QRD0W Service Manual

 Wiring Diagrams 
Indoor unit wiring diagram: 16022500004023
FUNCTION OF SWITCH
SWITCH
FOR CCM UNIT ADDRESS
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0~15
S2
+
S1
ADDRESS
ON
12
ON
12
ON
12
ON
12
32~47
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
16~31
48~63
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
S2
+
S1
ADDRESS
Factory
Setting
Factory
Setting
SWITCH
FOR TEMP.COMPENSATION
SW6
ON
2
STATE
VALUE
4
6
E function
Factory
Setting
ON
1 2
ON
1 2
ON
1 2
ON
1 2
SWITCH
FOR FAN MOTER
CONTROL THEN NO
POWER REQUEST.
SW2
STATE
MODE
FAN OFF
FAN ON
Factory
Setting
ON
ON
ON
CN16
CN14
XS9
SWING
MOTOR
XP9
RED
Reactor
RED
CN13
DISPLAY
BOARD
TO WIRE
CONTROLLER
10
T2
T1
CN6
4
ROOM TEMP.
BLACK
WHITE
NEWFAN
CN8
M
CN10A
(CN10)
M
PUMP
2
INDOOR UNIT
MAINBOARD
CN40
TO WIRE
CONTROLLER
5
CN23
ON - OFF
Remote
Control
CN33
ALARM
Alarm
Output
Outer Driver DC Motor
Y/G
DC MOTOR
DRIVER MODLE
CN13
CN3
3
CN15
M
Inner Driver
DC Motor
5
M
RED(BROWN)
CN1
BLUE(BLACK)
CN5
WATER LEVEL SWITCH
EYX
To CCM
Comm.Bus
CN7
T2B
OUTER PIPE TEMP.
POWER
P1
CN3
JR6
JR6
FAN1
CAP1
Y/G
P3
P2
6
CN4
2
H
CH
P4
Y/G
4
BROWN
BLACK
CN110
YELLOW
Y/G
TO OUTDOOR UNIT
P5
MAGNETIC
RING
MAGNETIC RING
NOTE:
The wiring diagram
is for explanation
purpose only. The
actual shape of the
components may be
different.
16022500004023
WIRING DIAGRAM
(INDOOR UNIT)
SWITCH
FOR COOLING & HEAT ING
SW7
ON
STATE
MODE
COOLING&
HEATING
COOLING
ONLY
ON
ON
Factory
Setting
OR COOLING ONLY
SETTING
8
24
15
FAN MOTOR STOP-TEM
SW1
ON
1 2
ON
1 2
ON
1 2
ON
1 2
Anti-cold air
According
to the
EEPROM
setting
Factory setting
ON
SWITCH
FOR AUTO-RESTART
SW3
ON
STATE
MODE
REMEMBER
NO_REMEMBER
ON
Factory
Setting
SETTING
SWITCH
FOR MODE-PRIOR SETTING
ON
STATE
MODE
HEAT
Factory
Setting
ON
12
ON
1 2
ON
1 2
ON
12
HEAT
COOL
COOL
SW5
106~140
161~200
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
0
8
4
1
2
3
5
6
7
C
9
A
B
D
E
F
20
26
36~5332~35 54~71 72~90 91~105 141~160

Midea MCA3U-18HRFNX-QRD0W Specifications

General

Brand	Midea
Model	MCA3U-18HRFNX-QRD0W
Category	Air Conditioner
Language	English