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Manuals
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Bryant Manuals
Air Conditioner
SM03-4
Service manual
Bryant SM03-4 Service Manual page 17
Residential fan coil units
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Troubleshooting
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FU1
FU3
YEL
YEL
BLU
BLK
VIO
SEQ1
RED
ORG
SEQ2
BRN
YEL
BLK
BLU
COMMON
COMM
R
ON TERMINAL BOARD ABOVE
LS 4 HTR4
BLK
YEL
8
SEQ 2
LS 3 HTR3
BLK
YEL
6
LS 2 HTR2
BLK
YEL
4
SEQ 1
LS 1 HTR1
BLK
YEL
2
3
2
1
6
5
4
9
8
7
12
11
10
PLUG
AC LINE
T1
T2
T3
DUMMY
BLK
BLU
RED
(208V)
(230V)
C
RED
TRAN
BRN
(24V)
COMM
C
Fig. 13—Wiring Schematic
—17—
FU4
BLK
7
BLK
5
BLK
3
BLK
1
TERM BOARD
W3
W2
E
L
O
C
5 AMP
FUSE
Y
MAX
C
R
G
RELAY
240 VDC
DUMMY
DUMMY
L2
EAC2
FAN
L1
EAC1
240 VAC
240 VAC
YEL-COMMON
FM
BRN
CAP
BRN
GRN/YEL-GND
FU2
BLK
AUX1
AUX2
F4
F3
F2
F1
COMMON
RED-LO
BLU-MED
BLK-HI
A97032
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Table of Contents
Troubleshooting
SAFETY CONSIDERATIONS
2
Troubleshooting PCB
5
CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING
8
Troubleshooting PCB
11
ELECTRIC HEATER FUNCTION AND TROUBLESHOOTING
19
Troubleshooting KFA, KFB, KFC, and KFD Series Electric Heaters
20
Troubleshooting PCB
24
Troubleshooting ICM2
26
FAN COIL DESCRIPTION
28
Troubleshooting PCB
32
Troubleshooting ICM2
34
FF1A/FF1B/FF1C SERVICE AND TROUBLESHOOTING
40
FD3A SERVICE AND TROUBLESHOOTING
44
Care and Maintenance
45
Maintenance
46
Electrical Operating Sequences and Troubleshooting
48
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