38MGRBQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
WIRING DIAGRAMS (CONT)
Size 24K (24R)
Fig. 9 — Wiring Diagram Size 24K (24R) - 3 Zone Max High Heat
Table 3 — Wiring Diagram Size 24K (24R) - 3 Zone Max Codes
CODE PART NAME
CN3~CN4 Input: 230VAC High voltage
CN20,CN23,CN25 Output: Pin1 (Connection of the high voltage)---“S” Pin2~Pin3 (230VAC High voltage)---”L1&L2”
P1~P2 Output: Short Circuit with Red Wire
CN1~CN2 Output: 230VAC High voltage --- 4 Way Valve
CN5~CN6 Output: 230VAC High voltage --- Compressor Crankcase Heater
CN8~CN9 Output: 230VAC High voltage --- Chassis Crankcase Heater
P-1~P-2 Connection to the earth
CN18,CN19,CN22 Output: Pin1-Pin4: Pulse waveform (0-12VDC), Pin5, Pin6 (12VDC)---EEV
CN7 Input: Pin1 (0-5VDC), Pin2 (5VDC) --- Discharge Sensor
CN17 Input: Pin3, Pin4 (5VDC), Pin2 (0VDC), Pin1, Pin5 (0-5VDC)-OUD Conditioner Temperature
CN15 Input: Pin1, Pin3, Pin5 (5VDC) Pin2, Pin4, Pin6 (0-5VDC) --- IDU Pipe Temp
CN14 Input: Pin2, Pin4 (0VDC), Pin1, Pin3 (0-5VDC) --- H/L Pressure Switch
CN12 Input: Pin1 (5VDC), Pin2 (0-5VDC) --- Compressor Temp
CN29~L-OUT Output: 230VAC High voltage to IPM Board
CN21 Connect to the IPM BOARD
CODE OUTDOOR UNIT IPM DRIVE BOARD
CN4~CN5 Input: 230VAC High voltage - from main board
CN2~CN3 Output: Connection of the REACTOR
U~V~W Connect to compressor voltage among phases 0~200VAC
CN14 Connect to the DC FAN
CN1 Connect to the MAIN BOARD
1(A)2(A)3(A)L2L1
RED
BLACK
Y/G
BROWN
BLUE
BLACK
BROWN
BLUE
BLACK
TO A TO B
POWER
SUPPLY
Y/G
COMPRESSOR
W(C)
V(S)
U(R)
3
3
REACTOR
CN14
BLACKREDBLUE
BLUEBLUE
UVW
CN3CN2
CN1
CN5CN4
BLACK(BLUE)
RED(BROWN)
5
Y/G
P-1
CN3 CN4
S-A S-B
CN25
CN23
4-WAY
CN1 CN2
HEAT1
CN6
CN5
HEAT2
CN9 CN8
P-2
Y/G
RED
P1
P2
VALVE-A
VALVE-B
CN18
CN19
6
6
ELECTRONIC
EXPANSION
VALVE
ELECTRONIC
EXPANSION
VALVE
CN7 CN17
T4
T3
T2B
CN15
AB
INDOOR COIL OUTLET
TEMP. SENSOR
CN14
LOW/HIGH
L-OUT
RY2
CN29
ON(4)
COM(3)
HIGH
PRESSURE
SWITCH
LOW
PRESSURE
SWITCH
4
RED
YELLOW
1(B)2(B)3(B)1(C)2(C)3(C)
TO C
33
BROWN
BLUE
BLACK
S-C
CN20
3
VALVE-C
CN22
6
ELECTRONIC
EXPANSION
VALVE
C
DC FAN
MOTOR
CHASSIS
HEATER
CRANKCASE
HEATER
OUTDOOR AMBIENT TEMP. SENSOR
COIL TEMP. SENSOR
COMP. DISCHARGE TEMP. SENSOR
REVERSE
VALVE
MAIN CONTROL BOARD
IPM DRIVE BOARD
NOTE: Use the magnetic ring
(field supplied) to connect the
connective cable of the indoor
and outdoor units after
installation. One magnetic ring
is used for one cable.
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