Diagnostic Description
Green LED
Red LED
Control Fault (No Power)
Off
Off
L1/Neutral Polarity Fault
Flash
Flash
1 Hour Lockout
Alternating Flash
Normal Operation
On
On
Pressure Switch Closed Fault
On
Flash
Pressure Switch Open Fault
Flash
On
Open Limit Switch Fault
Flash
Off
Diagnostic Description
Yellow LED
Low Flame Sensor Signal
Continuous Flash
Flame Present
On
Place label with flash codes near the
III 11111111111111111111111 wiring
ring diaf gram on the furnace door for
f u t ure
7108790
SELECT INSTRUCTION
**ATTENTION INSTALLERS**
These instructions describe how to properly replace a
single stage *G6/L1 control board (PN 624631) with a
*G7 control board (PN 624690). These instructions only
apply to *G7 single stage furnaces.
WARNING:
To avoid electric shock, personal injury, or death,
turn off the electric power at the disconnect
or the main service panel before making any
electrical connections.
When connecting the wires from the blower motor, please
note which wire connects to the HEAT and COOL terminals
on the *G7 control board. NOTE: If the motor does not
have an orange wire, do not place any wire on the Medium
Low terminal, this should be left empty.
The 6 pin (P1) and the 9 pin (P2) wire plugs will connect
directly to the 624690 control board, there is no need to
change any wire position.
Place label with flash codes near the wiring diagram on
the furnace door for future reference.
*G6/L1 Terminal
(624631 Board)
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
When replacing the *G6/L1 control board (PN 624631)
with a *G7 control board (PN 624690), install all wires
from the door switch and 24V transformer on the same
pin locations they were removed from. This means the
wire that was attached to the L1 terminal on the 624631
control board will need to be attached to the L1 terminal
on the 624690 board, the wire on the XFMR terminal of
the *G6/L1 board should be placed on the XFMR terminal
of the *G7 board, etc.
When connecting the wires from the thermostat, heat
pump, AC unit, or air handler to the RCYGW terminals
of the *G7 board, install all wires on the same terminals
they were removed from.
180
120
90
60
I-
co
CT) 1'
3
EAC
Black
EAC
Neutral
White
Neutral
Black
HIGH
Blue
Blower
Motor
MH
COOUM1/M2/HEAT
Orange
ML
Red
LOW
Ll
Black
L1
Neutral
White
Neutral
HUM
Black
HUM
Neutral
White
Neutral
XFMR
Black
XFMR
Neutral
White
Neutral
24V
Black with
white stripe
24V
COM
White with
black stripe
COM
6 Pin
Connector
P1
Multi
P1
9 Pin
Connector
P2
Multi
P2
Door
Switch
Humidifier
24V
Transformer
0
CO CV 03
° °
CD
LOW '
XFMR
CC
ML [
BLOWER
OFF
DELAY
EAC
cn -5,
0
*G7 Terminal
(624690 Board)
Air Cleaner
Li
rn
Wire
Color
COOL r
tA
u_ 1
MH I
HIGH'
EACI
FEAT
m.
M3
M2
L1
HEAT
I No
XFMR '
COOL
ET= FAN
]
M1
HUM
HUM —
P2
P1
O
3)(2)1 )1j !
P2
(62[51(4)J
C Y GW
(6)(5) (4)
c)(6)(9
[
P1
L_J
7
-[[1
). C)
<
;918
RCYGW
j aXIJ
NEUTRALS
*G6/L1 Single Stage Control Board
j
[
121®
CX]01
*G7 Single Stage Control Board
NEUTRALS
+06 p ue+08 J Od
OW`uollud,0
3-L£LOLL#am
in
O
Yellow LED
ius F lash
0
FAULT COND
Diagnostic Descri pti on
Cont rol F aulUN o Power)
L l / Neut ral P olari ty F ault
1 H our Lockout
Normal Operation
P ressure Switch Closed Fault
P ressureSwitch Open Fault
OpenLi mit SwitchFault
Diagnostic Descri ption
Low Flame S ensor Signal
Flame P resent
U seco pperc ond u ct orsonl y.
m
WIRING DIAGRAM
For 80+ and 90+ Model Furnaces
I 1 ■./ E
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WV, SWITCH
IMMO
MOMS ONLY,
I
7
u a' 00 g tj,,
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KACK 127ffl
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ROOM 11011/011.TAT
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WWI,. WI
67111.1111.
SAIRTI•VATIN
MMACT YODELS ONL,
oQ
NLaeawnnrs.urn
wQ
Ith
I
I I
FppppF
O
Qs
Refer to the Installation
Instructions provided
with the furnace for the
proper heating and
cooling speeds for your
application.
.r.
TO OUTDOOR UNIT
II II
FLAME
SOP
BLUE
BLUE
3 OR SPEED MOTOR
mow
*nom
ORANGE
ORANGE
1-
S
7
BLACK
1177
NEUTRALS
•ve
I
I
03,
.
COW
• *Hit
iga
ram
lie 4
41!.!
MOM
Legend
Fb
CACI(
01ACK
Field Wiring — — — —
Factory Wiring:
Low Voltage
BLACK
High Voltage
■
■
STATUS
RED
LIGHT
N
FAULT CONDITION
=3
■
13131:11211EICIEI III
CIC11:9131E11:1EICSIO
Power On
ON
Limit Circuit Open or External Load On "W"
1 FLASH
Pressure Switch Is Open with Inducer On
2 FLASHES
Pressure Switch Is Closed with Inducer Off 3 FLASHES
Ignition Failure (Check Ground)
WHITE
5 FLASHES
False Flame or Gas Valve Relay Shorted
Continuous
Power OR
RED
ORANGE
BLUE
FAULT CONDITION
BLACK
Low Flame Sensor Signal
BLUE
Flame Present
*G7 Wiring Diagram
4 FLASHES
115 VAC & Neutral Reversed or no Ground
OFF
FLAME
YELLOW
LIGHT
Continuous
Flash
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 105° C.
Use copper
conductors only.
ON
`G6/L1 Wiring Diagram
These wires ere
not present
on all models
7103550 (Replaces 7 03250)
111111 11111111