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