Midea MCH2U-18PHH2, Service Manual

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29
PCB board of MCH4U-36PHH2
N L
SHOW/SW
EARTH
[1.4]2014.06.26
EU-KFR105W/BP3T5N1-350S.D.13.WP1-1
L-OUT
N-OUT
CONNECT TO INVERTER driver
H
IGH
LOW
T2B-E T2B-D T2B-C T2B-BT2B-A
TP
T4
T3
S-E
S-D
S-C
S-B
S-A
FAN_OUT
FAN_IN
Q
E
P
A B C D E
202302141206
CN19
D4
R134
R133
R89
R37
+ E12 +
E15
CN
10
N
C18 CN9
ZR3
ZR2
ZR1
X1
S
RY8
RY7
RY6
RY5
RY3
RY2
R213
R212
R211
R210
R180
R170
R140
R131
R130 R129 R128 R127 R126
R125 R124
R123
R121
R120
R118
R117
R116
R115
R114
R113
R112
R111
R110
R109
R108
R107
R106
R105
R104
R103
R102
R101
R100
R99
R98
R96
R95
R94
R93
R92
R91
R90
R88
R81
R80 R79
R78
R77 R76 R75
R74
R73
R72
R71 R70
R69
R68
R67
R66
R65
R64
R63
R62
R61
R60
R59
R58
R57
R56
R55
R54 R53
R52
R51
R50
R49
R48
R47
R46 R45
R44
R43
R42
R41
R40
R39 R38
R36
R35
R34
R33
R32
R31 R30
R29
R28
R27
R26
R25
R24
R23
R22
R21
R20 R19
R18 R17 R16 R15
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5 R4 R3
R2
R1
Q5
Q2
PTC1
LED1
L3
IC30
IC22
IC21
IC20
IC19
IC18
IC17
IC16
IC15
IC14
IC13
IC12
IC10
IC9
IC8
IC7 IC6
IC5
IC2
IC1
FUSE2 5A/2 50V
FUSE1
T30A/250V
E21
E20
+
E19
+
E16
+
E14
E13
E11
E9
E8
E5
E4
E3
E1
DSP1
DSA1
D28
D27
D26
D25
D24
D23
D22
D21
D20
D19
D18
D17
D16
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D3
D2
D1
CONdebug
CN
44
HEAT
2
CN43
FAN
CN42
C
CN41
C
CN40
H
EAT1
CN
34
CN3
3
CN30
CN29
CN28
CN27
CN26
CN
22
4-WAY
CN20
CN18 CN17
CN1
6
CN1
4
C
omp
To
p
CN12
CN11
CN8
CN6
CN5
CN4
N
CN3
N
CN2
N-IN
CN1
L-IN
C103
C98
C97
C96
C95
C94
C93
C92
C91
C90
C72
C70
C69
C68
C67
C66
C65 C64
C62
C61
C60
C59
C58
C57
C56
C55
C54 C53
C52
C51
C50
C49
C48 C47
C46
C45
C44
C43
C42
C41
C40
C39
C38
C37
C36
C35
C34
C33 C32
C31
C30
C29
C28
C27
C26
C25
C24
C23
C22
C21
C20
C19
C17
C16
C15 C14
C13 C12
C11
C10
C9
C8
C7
C6
C5
C4
C3 C2
C1
JP1
JP2
D29
D30
CN23
SSR1
CN
7
CN13
P-1
L1
R82 R83
R84
R85
R86
R87
R97
R119
R122
R132
CN3
5
N
CN37
FAN-L
Q3
Q6
Q7
Q8
Q9
CN36
FAN-H
E2
IC3
Q1
Q4
IC4
ZR4
RY4
CN32
CN38
L2
R135
SW1
CN21
Electric Expansion
Value B Electric Expansion
Value E
Electric Expansion
Value D
Electric Expansion
Value C
Electric Expansion
Value A
485
communication testPort
connect to detector
external drive DC fan
motor input terminal
external drive DC fan
motor ouput terminal
current loop
communication A
current loop
communication B
current loop
communication C
current loop
communication D
current loop
communication E
digital display
Fuse
T30A/250V
connect to high and low
pressure sensor
connect to
trmp. sensor
Fuse 5A/250V
connect to earth
CN23 reserve
digital display button
test report
connect to detector
CN43-5,CN43-1/CN41,CN42
AC fan motor capacitor
connector
CN43-4/CN37 CONNECT TO
AC FAN MOTOR(LOW SPEED)
CN43-3/CN36
AC fan motor low speed
connector
CN43-2/CN35
AV fan motor N phase
current loop
communication C
Signal wire
24VDC Pulse wave
connect to the terminal
connect to the terminal
208-230V AC
power supply
room temp sensor
pipe temp sensor
(3.3V)
(3.3V)
high pressure sensor
low pressure sensor
Connect to the Indoor evap.pipe
out temp. sensor
T2B-A、T2B-B、T2B-C、T2B-D、T2B-E
+1
2V
DC
pulse wave between (+1)-GND
+1
2V DC pulse wave between
(+
2)-GND
+1
2V DC pulse wave between
(+
3)-GND
+12V DC pulse wave between (+
4)
-GND
+12V DC
+12
V DC
6 5 4 3 2 1
when 4-way is ON, output 208-230VAC
connect to the 4-WAY
when heater is ON, output 208-230V AC
connect to compressor heater
CN44 L
CN10 N
CN40 L
CN4 N
CN22 L
CN3 N
connect to exhaust
temp. sensor
connect to the terminal
208-230V AC
external drive DC fan
motor connector
T3
T4
electric
heater1
electric
heater 2