Carrier 38MGRBQ18B-3 - Page 10

38MGRBQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
WIRING DIAGRAMS (CONT)
Size 36K HH
Fig. 11 — Wiring Diagram Size 36K HH - 4 Zone Max
NOTE: Electronic Expansion Valve E is only available on the 48K - 5 Zone Max (See Fig. 12 — on page 12).
B
CN1
BLUE
XT1
Y/G
RED
BLACK
CN3
P5
Y/G
P6
Y/G
CN2
CT1
CN4
RED
BLACK
RED
BLACK
CN2
CN3
IPM&PFC BOARD
U
V
W
RED
BLACK
U
V
W
COMP
CN9
10
CN6
CN8
CN5
3
3
DCFAN1 DCFAN2
CN8
TP
T3
T4
CN9
INDOOR COIL
OUTLET
TEMP.SENSOR
A
CD
T2B- D C B A
CN11
ELECTRONIC EXPANSION VALVE A
ELECTRONIC EXPANSION VALVE B
ELECTRONIC EXPANSION VALVE C
ELECTRONIC EXPANSION VALVE D
MAIN CIRCUIT ELECTRONIC EXPANSION VALVE F
CN14
CN10
H-PRO
L-PRO
CN15 A
CN23
B
CN26 C
CN30
D
CN38 F
6
6
6
6
6
CN17
CN18
1(A)
2(A)
3(A)
1(B)
2(B)
3(B)
BLUE
BLUE
4-WAY
SV
RED
BLACK
RED
CN24
CN25
HEAT_Y
RED
BLACK
WHITECN19
CN20
HEAT_D
MAIN POWER SUPPLY
XT3
1(C)
2(C)
3(C)1(D) 2(D)
3(D)
XT2
TO C
TO D
COMP TOP
YELLOWRED
L1 L2
CN21
S-C
CN16
S-D
TO A
TO B
CN37
S-A
CN29
S-B
3
3
3
3
BROWN
BLUE
BLACK
BROWN
BLUE
BLACK
BROWN
BLUE
BLACK
BROWN
BLUE
BLACK
Notes:
This symbol indicates
the element is optional,
the actual shape shall be prevail
MAIN CONTROL BOARD
Y/G