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Wiring Diagram
Internal Faults or IRQ Loss
Lockout Due to Excessive Retries or Recycles
Pressure Switch Stuck Closed
Pressure Switch Open
Open High Limit Switch
Flame Detected When no Flame Should be Present
Open Fuse
Low Flame Signal
Ignitor Relay Fault
Reversed Line Polarity or Grounding Error
Internal Gas Valve Error
External Gas Valve Error
Open Rollout Switch
Ignitor Open
Inducer Relay Error
TWIN Error
Grounding Error
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
GY
RD
RD
YL
READ CODES FROM LEFT TO RIGHT
E21
E34
E24
W/W1 R
G
R
Y/Y1 Y2
ECM MTR
HARNESS
CHASSIS
BLOWER
CIRCULATOR
GROUND
Seven Segment Display
Error Code Status
Seg#3
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
BK
WH
PK
TH (3)
RLI (12)
HLO (1)
PS1(5)
HLI (8)
MV (10)
C
MVC (11)
TR (7)
TO
R
TO
MICRO
BK
BK
NOTES:
1. SET HEAT ANTICIPATOR ON ROOM THERMOSTAT AT 0.7 AMPS.
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED
WHEN SERVICING.
3. 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.
4. UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N.E.C.
AND LOCAL CODES.
5. TO RECALL THE LAST 6 FAULTS, MOST RECENT TO LEAST RECENT,
DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN STANDBY
(NO THERMOSTAT INPUTS)
Seg#2
Seg#1
COLOR CODES:
E
E
PK PINK
E
0
BR BROWN
E
1
WH WHITE
E
2
BL BLUE
GY GRAY
E
3
RD RED
E
4
YL YELLOW
E
5
OR ORANGE
PU PURPLE
E
6
GN GREEN
E
L
BK BLACK
E
A
E
b
E
C
1
1
E
n
E
j
E
H
1
0
63
*M9S92/*M9S96/*C9S96
POWER BEFORE
PROPERLY POLARIZED
40 VA
TRANSFORMER
C
NO
HI
C
C
NO
INDOOR
AIR
CIRCULATOR
BLWR
INTERGRATED CONTROL MODULE
EQUIPMENT GND
FIELD GND
FIELD SPLICE
SWITCH (TEMP.)
IGNITER
SWITCH (PRESS.)
OVERCURRENT
PROT. DEVICE
JUNCTION
TERMINAL
INTERNAL TO
INTEGRATED CONTROL
PLUG CONNECTION
LOW VOLTAGE (24V)
LOW VOLTAGE FIELD
HI VOLTAGE (115V)
HI VOLTAGE FIELD
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