Bryant 38MURA Manual page 91

WIRING DIAGRAMS (CONTINUED)
MAIN CONTROL BOARD
Input:230VAC High voltage
CN1~CN3
P5 P6 Connection to the earth
P8~P7 Output:230VAC High voltage to 24V BOARD
CN21 Output:Pin1(Connection of the high voltage)"S"
CN17~CN18 Output:230VAC High voltage----REVERSING VALVE
CN24~CN25 Output:230VAC High voltage----CRANKCASE HEATER
CN19~CN20 Output:230VAC High voltage----CHASSIS HEATER
CN8 Input:Pin1(0-5VDC),Pin2(5VDC)
CN9 Input:Pin3 Pin4(5VDC),Pin2(0VDC),Pin1 Pin5(0-5VDC)
CN6 Communication:Pin1-Pin6 Pulse waveform(0-5VDC),Pin7,
Pin9(0VDC),Pin8(0-5VDC),Pin10(5VDC)--to IPM&PFC BOARD
Output:230VAC High voltage to IPM&PFC BOARD
CN2~CN4
CN10 Input:Pin2 Pin4(0VDC),Pin1 Pin3(0-5VDC)--H/L Pressure switch
CN14 Input:Pin1(5VDC),Pin2(0-5VDC)--COMP. TOP OLP TEMP.SENSOR
IPM&PFC BOARD
CN2~CN3
Input:230VAC High voltage
Communication:Pin1-Pin2 Pulse waveform(0-5VDC),Pin7,
CN9
Pin9(0VDC),Pin10(5VDC)--to outdoor main control board
U~V~W Connect to compressor voltage among phases 0~250VAC
CN8 CN5 Connect to DCFAN voltage among phases 0~200VAC
24V BOARD
CN3~CN4
Input:230VAC High voltage
CN7 (Connection of the high voltage)"S"
CN9 Input:Pin1(5VDC),Pin2(0-5VDC),Pin3(0VDC)--
CN28 Output:Pin1-Pin4 Pulse waveform(0-12VDC),
Pin5 Pin6(12VDC) to EEV
CN11 Input:Pin1 Pin3(5VDC),Pin2 Pin4(0-5VDC)
BLACK
RED
BLUE
W V U
COMP
Y/G
CODE PART NAME
COMP COMPRESSOR
AC CURRENT
CT1
DETECTOR
ELECTRONIC
EEV
EXPANSION VALVE
DCFAN1 OUTDOOR DC
DCFAN2 FAN MOTOR
HEAT_D CHASSIS HEATER
HEAT_Y
CRANKCASE HEATER
H-PRO HIGH PRESSURE
SWITCH
LOW PRESSURE
L-PRO
SWITCH
SV
REVERSING VALVE
COMP. DISCHARGE
TP
TEMP. SENSOR
PRESSURE SENSOR
T3
COIL TEMP. SENSOR
OUTDOOR AMBIENT
T4
TEMP. SENSOR
HQ
SUCTION TEMP. SENSOR
REFRIGERANT
LMG
TEMP. SENSOR
COMP. TOP OLP
COMP TOP
TEMP. SENSOR
Fig. 17 —Wiring Diagram Sizes 48K-60K
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Y/G
P6
BLACK
BLACK
CN2
CN4
CN3
RED
CT1
RED
IPM&PFC BOARD
CN2
W
V
10
CN9 CN6
U
MAIN CONTROL BOARD
CN8 CN5
3
3
DCFAN1 DCFAN2
CN8 CN9 CN14
TP
COMP TOP
T3 T4
Notes:
This symbol indicates
the element is optional,
the actual shape shall be prevail
91
Y/G
Y/G
XT1
P5
BLACK
CN3
YL
RED
CN1
YELLOW
CN21
CN7
BLUE/(BLACK)
P7 CN4
BROWN/(RED)/(WHITE)
CN3
P8
CN11
BLACK
BLACK
CN20
HEAT_D
RED
CN19
WHITE
HQ
BLACK
CN25
HEAT_Y
RED
CN24 RED
BLUE
CN18
4-WAY SV
CN17
BLUE
CN10
RED
YELLOW
TO 24V THERMOSTAT
s1
INDOOR UNIT
1
THROTTLING
INDOOR AND
2
OUTDOOR MODE
3
NONE
4 NONE
PRESSURE
SENSOR
3
EEV
CN9
6
M
24V BOARD
S
ON
S1
N-OUT 1 23 4
ON~OFF
L-OUT
CN6 S1S2 B W D
Y1Y2 L
R C
WHITE
LMG
INDOOR AND
OUTDOOR MODE
S1 S2 B W D
R C Y1 Y2 L
CN6
TO INDOOR UNIT
OUTDOOR UNIT
ONLY MODE
S1 S2 B W D
R C Y1 Y2 L
CN6
OFF
ON
OUTDOOR UNIT
THROTTLING
OUTDOOR UNIT
ONLY MODE
PRESSURE
COMPENSATION
NONE
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