1083288-UIM-A-0114
38
Johnson Controls Unitary Products
SECTION XII: WIRING DIAGRAM
FIGURE 40:
Wiring Diagram
115VAC
115VAC
1
2
3
4
5
6
8
7
9
10 11 12
MOT
IDM
EAC
HUM
EAC
HUM
HSI
HUM
DS
TST
GND
GND
GV
LS
PS1
EAC
R
G
Y1
W
ROS
ROS
W
Y1
G
C
R
24V SEC
115V COM
XFMR
PRI
C
C
NO
NO
NEUTRALS
HUM
LINE
XFMR
L1
EAC
HEAT
HI COOL
LO COOL
24V COM
G
PARK
BLU-MED HI
GRN
GND
GRY-MED
YEL-MED LO
RED-LOW
BLK-HI
MOT
SEE NOTE 2
BLK
DS
WHT
C
NO
FURNACE CONTROL
ROS
ROS
FS
GV
PS1
RED/WHT
RED/BLK
YEL
RED
YEL
PRP
ORN/BLK
RED
ORN
RED/GRN
C
LS
1
2
NO
WHT
EAC
HUM
BLU
WHT
24V SEC
COM 115V
PRI
XFMR
GRN
GND
C
G
R
W
Y/Y2
Y1
1
2
3
4
5
C
L
G
N
BLK
BRN
BLU/WHT
L
N
1,2,3,4
OR 5
G
Y/Y2
Y/Y2
MOT
C
PS2
C
NO
PS2
C
NO
WHT
BLK/WHT
PF
1600/2000 CFM
MODELS ONLY
1
2
4
3
HSI
IDM
GRY
GRY
TAN
TAN
WHT
WHT
2
1
S3
PF
1600/2000 CFM
MODELS ONLY
THE 40,000 INPUT
FURNACE HAS ONLY
ONE ROLLOUT SWITCH
Wiring Diagram - 95% Single-Stage X Furnace
Flashes
Diagnostic Fault Codes
Fault Condition
Power Off or blown fuse
Normal Operation
Normal Operation with call for heat
No G from thermostat
Control Failure
Flame present with gas off
Pressure switch stuck closed
Vent, intake, or termination problem
Airflow problem OR open fuse
Flame Rollout OR open fuse
Repeated 3 Red
Failed to light burners
Loss of flame during call for heat
Hot/Neutral reversed OR
poor ground/neutral
Gas valve shorted "ON"
Check blower motor/wiring
None
Slow Green
Slow Amber
4 Amber
Steady on Red
1 Red
2 Red
3 Red
4 Red
5 Red
6 Red
7 Red
8 Red
9 Red
10 Red
11 Red
SERVICING THIS UNIT
OPEN ALL DISCONNECTS BEFORE
CAUTION
PRECAUTION
OUVREZ LES DISJONCTEURS AVANT
DE PROCEDER AVEC LE SERVICE
1042427-UWD-A-0413
Fault Code Retrieval
To retrieve fault codes, push and release ERROR button on control board. The LED will flash the
last five error codes, beginning with the most recent. If there are no fault codes in memory, the LED
will give two green flashes. To clear the fault code memory, push and hold the ERROR button for
at least five seconds. The LED will give three green flashes when the memory has been cleared.
Notice - Only a qualified service technician should use this feature.
Fault code retrieval functions will work only if there are no active thermostat signals.
NOTES:
1. Si l'un des fils d'origine fourni avec ce four doit être remplacé, il doit être
remplacé avec le fil ayant un degré de température d'au moins
221 degrés F (105 degrés C ).
2. Les connexions à grande vitesse du moteur du ventilateur indiqués sont
typiques, mais peuvent varier selon le modèle et par application.
NOTES:
1. If any of the original wire as supplied with the furnace must be replaced,
it must be replaced with wiring material having a temperature rating of
at least 221 degrees F (105 degrees C ).
2. Blower motor speed connections shown are typical, but may vary by
model and application.
DS -
ROS -
FS -
TST -
PS1 -
PS2 -
MOT -
IDM -
HSI -
EAC -
LS -
HUM -
XFMR -
GV -
Legend
Door switch
Rollout switch
Flame sensor
Wall thermostat
Pressure switch
Condensate pressure switch
Circulating motor
Inducer motor
Hot surface igniter
Electronic air cleaner
Limit switch
Humidifier
Transformer
Gas valve
DS -
ROS -
XFMR -
LS -
HSI -
PS1 -
MOT -
IDM -
GV -
HUM -
PS2 -
TST -
FS -
HUM -
Legende
Commutateur de porte
Commutateur de roulement
Transformeur
Commutateur de limite
Ignition de surface chaud
Commutateur de pression
Moteur soufflerie
D'induct moteur
Soupape de gaz
Humidificateur
Commutater de pression,
condensation
Thermostat
Capteur de flame
Filtre électrique
