ICM Controls ICM2913 General instructions
Installation, Operation & Application Guide
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ICM2913
Gas Ignition Replacement Board
• Controls blower motors, gas valve, & spark ignitor in sequence
• Protects against short cycling
• Selectable Heat/Cool blower off-delay time
• FlashcodesfromtheonboardLEDindicatespecicproblemsforeasiertroubleshooting
• Repeatedignitionfailuresoramelosseswilldisableheatoperationforsafety
FEATURES
The ICM2913 is a form, t, and functional replacements for the boards shown in the cross-reference
section of this guide. The control boards are designed as automated gas ignition controls which monitor
the ignition sequence including the inducer, pressure switch, spark ignition, gas valve, ame sense, and
circulating blower while maintaining full safety circuit monitoring including the high limit switch, roll out
switch and auxiliary limit switch circuits. Onboard diagnostics will indicate when a fault condition exists.
INTRODUCTION
• Line voltage: 230 VAC
• Line frequency: 50/60 Hz
• Control voltage: 18-30 VAC
• Circulator blower: 10 FLA, 30 LRA @ 240 VAC
• Inducer blower: 0.7 FLA, 1.5 LRA @ 240 VAC
• Combined gas valve load: 1.5 A @ 24 VAC
• Minimumamesignalthreshold:0.75 uA
SPECIFICATIONS
TRANE P/N #: D674711P01
REPLACES
CAUTION!
To service control, and prior to disconnection, label all wires. Failure to do so may
result in wiring errors that can cause dangerous operation.
1. Turn thermostat to the OFF position or set it to the lowest possible setting.
2. Turn OFF the electrical supply to furnace.
3. Turn OFF the gas supply to furnace.
CAUTION!
Failure to turn off gas and electric supplies can result in explosion, re, death or
personal injury.
4. Remove the furnace blower and control access doors.
5. Disconnect the thermostat wires and humidier wires (if equipped with a humidier).
6. Disconnect the line voltage, blower, electronic air cleaner wires (if equipped) and transformer wires.
7. Remove screws and any other fasteners and the old circuit board.
8. Examine the control and the control box for water stains.
9. Make repairs if any sources of water leakage are found. Be sure to check humidiers, evaporator
coils and vent systems in the area of the control.
REMOVE EXISTING CONTROL
1. Ground yourself. When handling the circuit board; hold it by the edges.
2. Fasten the circuit board with the retaining screws.
3. Connect all line voltage, low voltage and accessory wires.
4. Verify the sequence of operation.
INSTALL NEW CONTROL
The control will go into a 1-hour soft lockout if the following faults are detected:
• Limit switch open 4 times in one heat call
• Ignition failed (ame not sensed) 4 times in one heat call
• Flame lost after successful ignition 3 times in one heat call
• Gas valve sensed on when it should not be
• Gas valve sensed off when it should be on, 10 times in one heat call
Flame sensed while the gas valve is closed puts the control in lockout state, but lockout clears after the
blower off delay is complete (90 seconds or 60 seconds, depending on jumper selection).
LOCKOUT
Function Time Units
Heat “ON” delay 45 Sec
Cool “ON” delay 2Sec
Flame recognition time 0.8 Sec
Flame establishing period 7 Sec
Flame failure response time (before 10
seconds after trial for ignition period)
2Sec
Flame failure response time (otherwise) 0.8 Sec
Recycle time 27 Sec
Lockout time 300 Sec
Pre–purge time 20 Sec
Post–purge time 5Sec
Auto-restart purge time 5Sec
Trial for ignition period 7 Sec
Interpurge time 60 Sec
Auto restart time 60 Min
Retry 2Each
Recycle 10 Each
Heat fan OFF delay 60 or 90 sec., eld selectable, default will be 90 sec.
Cool fan OFF delay 0 or 45 sec., eld selectable, 45 sec. will be default for
HEM, 45 sec. will be default for PSC.
(@ 25 VAC, 60 Hz, 25ºC unless noted)
TIMING
Fault code retrieval & clearing
When powering on, the control
ashes the last four error codes that
have occurred in the last 14 days.
The control will ash the newest error
rst and oldest error last. The fault
memory can be manually erased by
powering on with a G call in place
and toggling W 3 times.
TwoLED’sontheboard
• Status LED (Green)
– Slow Flash: Normal operation
with no call for heat
– Fast Flash: Normal operation with
call for heat
• Fault LED (Red)
– See table
FAULT CODE TABLE
# of Flashes Error
2External lockout (retries or recycles
exceeded)
3Pressure switch/Inducer error
4Open limit switch and rollout
5Flame sensed when no ame should
be present
6Not used
7 External gas valve circuit error
8Low ame sense
Solid Red Internal board error
Solid Red w/solid
‘STATUS’ LED
Continuous reset caused by an internal
board error
On a call for heat (24 VAC on the W input), the following occurs:
• Upon a call for heat the control checks the status of the pressure switch; if the pressure switch is open,
the control will energize the draft inducer.
• When the control veries the pressure switch has closed, the control will start a 20-second prepurge.
• When the pre-purge time delay is over, the control will energize the gas valve and initiate spark.
• The ignitor must be de-energized when the ame is sensed or at the conclusion of the trial for ignition
period, whichever comes rst.
• When ame is sensed, the control will energize the circulator fan within the ON-delay period.
When the call for heat is terminated, the following occurs:
• The control shall de-energize the gas valve and the draft inducer within the post purge period.
• When the heat mode fan OFF delay timer expires, the control will de-energize the circulator fan.
With a call for cooling, the following occurs:
On a call for cooling (24Vac on Y and G), the circulator fan is energized within the cool on delay period.
The control will ignore a call for Y without a call for G. After the thermostat is satised, the compressor
is de-energized and the jumper selected cool Off delay period begins. Following the cooling Off delay
period, the circulator fan is de-energized.
OPERATION
Use caution when installing and servicing the furnace to avoid and control electrostatic
discharge; ESD can impact electronic components. These precautions must be followed to
prevent electrostatic discharge from hand tools and personnel. Following the precautions will
protect the control from ESD by discharging static electricity buildup to ground.
1. Disconnect all power to the furnace. Do not touch the control or the wiring prior to discharging your
body’s electrostatic charge to ground.
2. To ground yourself, touch your hand and tools to a clean, metal (unpainted) furnace surface near
the control board.
3. Service the furnace after touching the chassis. Your body will recharge with static electricity as you
shufe your feet or move around, and you must reground yourself.
4. Reground yourself if you touch ungrounded items.
5. Before handling a new control, reground yourself, this will protect the control. Store the used and
new controls in separate; containers before touching ungrounded objects.
6. ESD damage can also be prevented by using an ESD service kit.
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
ELECTRICAL SHOCK HAZARD!
Before installing this unit, turn off power at the
main service panel by removing the fuse or switching the appropriate circuit breaker to
the OFF position. Follow all Local, State and National Electrical Codes when installing
this device.
CAUTION!
Only trained personnel should install or service heating equipment. When
working with heating equipment, be sure to read and understand all precautions in the
documentation, on labels, and on tags that accompany the equipment. Failure to follow
all safety guidelines may result in damage to equipment, severe personal injury or death.
> > >
CAUTION
< < <
Automatic Restart Purge
Lockout resets automatically after 1 hour. Whether a call is in place or not, the control activates the
inducer blower for 5 seconds. The inducer will deactivate and ensure the pressure switch is not stuck
closed before starting a new heat call.
Automatic Inducer Pre-purge Reset
If the pressure switch remains open after 2 minutes of draft inducer run time, the draft inducer will be de-
energized for 30 seconds. The sequence will start again checking for an open pressure switch.
Continuous Fan Off delay (single stage units only)
On a call for continuous fan (24 VAC on G), the circulator fan is energized. During a call for cooling
while the cool “On” delay is in place, the control will not respond to the fan input (G). If the fan was
called prior to the call for cool, the circulator fan will remain energized during the Cool “On” delay. When
the call for continuous fan is terminated, the selected cool Off delay period begins. When the cool Off
delay period expires, the circulator fan is de-energized.
Note:
If the fan is called prior to a call for heat,
the circulator fan will remain energized during the entire call for heat sequence.
Fault Code Retrieval
When powering on, the control ashes the last four error codes that have occurred in the last 14 days.
The control will ash the newest error rst and oldest error last. The fault memory can be manually
erased by powering on with a G call in place and toggling W three times.
Flame Sense Test Points
The ignition board is equipped with a set of ame sense test points. A multimeter can be used to test
ame sense by placing the meters probes on the two test pins and taking a DC voltage reading while
the ame sensor is in the presence of ame. 1VDC = 1µA ame current. Weak or poor ame sense is
represented by a reading of 0.7 VDC or lower.
SPECIAL FEATURES
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LIAF313
Thermostat interference There are some thermostats which can interfere with the way the ICM furnace boards sense the call for heat. If you are having any issues with establishing
ame, the rst step would be to remove all the thermostat wires from the board and temporarily jump R – W to test. If the furnace cycle completes, remove
the jumper, and replace the existing thermostat with a battery-operated thermostat or a hardwired thermostat which uses a R & C connection.
Weak or intermittent spark Make sure the furnace frame is grounded to earth ground. Ensure the common of the 24 VAC is grounded to Earth ground. Check or replace the spark
igniter. Check the primary and secondary voltage of the transformer for proper voltage.
Flame Loss • Check for bad or dirty ame sensor
• Check thermostat (bypass for testing)
• Check for proper ame sense signal at ame sense test pins
• Check for proper earth ground on furnace.
• 4 ame losses in a single heat call will put the control into a one-hour lockout.
No ame/Ignition failure If the ame is not established and proven during the initial sequence, there will be two more successive attempts allowed each having a sixty second
inducer purge between attempts. After three successive attempts if the ame is still not proven, there will be a 1 hour lock out before the system will try for
ignition again.
• Check the thermostat (bypass for testing)
• Check the pressure switch
• Check gas valve operation
• Check for good spark & check for good earth ground
Flame out of sequence Flame out of sequence represents a scenario where ame is sensed while the gas valve is closed. The control goes into a lockout state when ame is out
of sequence and the indicator LED blinks the appropriate code (see “lockout” section).
• Check and replace ame sensor
Furnace does not ignite and main blower runs
continuously
Check the high temperature limit switch for open circuit. Check all safeties. Clean or replace air lter. Check duct work and return air ducts for blockages.
TROUBLESHOOTING
B24 VAC common
C24 VAC common
ECM Electonically commutated motor
F1 Fuse
FS Flame sensor
GND Ground
GV Gas valve
IDM Induced draft motor
K1, K2 Gas valve relays
LIM Limit switch
PRI Transformer primary
PS Pressure switch
R24 VAC
ROS Roll out switch
SEC Transformer secondary
TH Transformer 24 VAC hot
TR Transformer 24 VAC common
1. N/A
2. Gas valve
3. Pressure switch in
4. Flame sensor
5. N/A
6. Fusible link (Roll out switch)
7. Common (24 VAC), B
8. Limit switch (out)
9. Limit switch (in)
LEGEND 9-PIN CONNECTION
B24 VAC common
C24 VAC common
ECM
F1 Fuse
FS Flame sensor
GND Ground
GV Gas valve
IDM Induced draft motor
N/A
K1, K2 Gas valve relays
LIM Limit switch
PRI Transformer primary
PS Pressure switch
R24 VAC
ROS Roll out switch
SEC Transformer secondary
TH Transformer 24 VAC hot
TR Transformer 24 VAC common
1. N/A
2. Gas valve
3. Pressure switch in
4. Flame sensor
5. N/A
6. Fusible link (Roll out switch)
7. Common (24 VAC), B
8. Limit switch (out)
9. Limit switch (in)
LEGEND 9-PIN CONNECTION
B24 VAC common
C24 VAC common
ECM Electonically commutated motor
F1 Fuse
FS Flame sensor
GND Ground
GV Gas valve
IDM Induced draft motor
K1, K2 Gas valve relays
LIM Limit switch
PRI Transformer primary
PS Pressure switch
R24 VAC
ROS Roll out switch
SEC Transformer secondary
TH Transformer 24 VAC hot
TR Transformer 24 VAC common
1. N/A
2. Gas valve
3. Pressure switch in
4. Flame sensor
5. N/A
6. Fusible link (Roll out switch)
7. Common (24 VAC), B
8. Limit switch (out)
9. Limit switch (in)
LEGEND 9-PIN CONNECTION
B24 VAC common
C24 VAC common
ECM Electonically commuted motor
F1 Fuse
FS Flame sensor
GND Ground
GV Gas valve
IDM Induced draft motor
K1, K2, K3 Gas valve relays
LIM Limit switch
PRI Transformer primary
PS Pressure switch
R24 VAC
ROS Roll out switch
SEC Transformer secondary
TH Transformer 24 VAC hot
TR Transformer 24 VAC common
1. Stage two of gas valve (HI)
2. Stage one of gas valve (LO)
3. Pressure switch in
4. Flame sensor
5. N/A
6. Fusible link (Roll out switch)
7. Common (24 VAC), B
8. Limit switch (out)
9. Limit switch (in)
LEGEND 9-PIN CONNECTION
Blower
ICM2914
MADE IN THE USA
LED2
FAULT
LED1
STATUS
HEAT
COOL
90 60
045
BLOWER RELAY
Inducer
PARK
B GWYR
E_GND
GWYRC
Thermostat
PRI
460 VAC
SEC
24 VAC
Earth
Ground
ECM
ECM
L1 L2
K4
K3
24 VAC
Load
Load
IN
IN
Spark
Electrode
Earth Ground
Earth Ground
WIRING DIAGRAM
FLAME CURRENT
1VDC = 1uA
TR
TH
F1
Blower
BLOWER
ICM2913
MADE IN THE USA
LED2
FAULT
LED1
STATUS
HEAT
COOL
90 60
045
BLOWER RELAY
Inducer
PARK
B
C
Load
Load
IN
IN
Earth Ground
B GWYR
E_GND
GWYRC
Thermostat
IDM
PRI
230 VAC
SEC
24 VAC
Earth
Ground
L1 L2
Spark
Electrode
Earth Ground
WIRING DIAGRAM
FLAME CURRENT
1VDC = 1uA
TR
TH
F1
Earth
Ground
Blower
ICM2916
MADE IN THE USA
LED2
FAULT
LED1
STATUS
HEAT
COOL
90 60
045
BLOWER RELAY
Inducer
PARK
B GWYR
E_GND
GWYRC
Thermostat
PRI
230 VAC
SEC
24 VAC
TR
TH
ECM
L1 L2
K4
K3
24 VAC
Line
VAC
IDM
Earth Ground
Spark
Electrode
Earth Ground
WIRING DIAGRAM
FLAME CURRENT
1VDC = 1uA
F1
WIRING DIAGRAM
ICM2915
LED1
STATUS
Thermostat
Earth
Ground
Spark
Electrode
F1
G
W2
W1
R
C
Y
W1
R
B
W2
G
Y
HEAT
COOL
9060
0 45
L2_BLO HIGH LOW L2_IND IND_HI
IND_LO
NC
NO
COM
NC
NO
COM
NC
NO
COM
NC
NO
NC
NO
COM
NC
NO
COM
NC
NO
COM
SEC
24 VAC
PRI
230 VAC
CR
L2L1
ECM Controller
R
B
IDM
Earth
Ground
PS ROS LIM
GV
PS RO FS
K2 K1
(C) (R)
PRI
460 VAC
SEC
24 VAC
Earth
Ground
Earth
Ground
B GWYR
E_GND
GWYRC
Thermostat
TR
TH
Chassis
Ground
Flame
Sensor
CONNECTION DIAGRAM
LIM (OUT) LIM (IN)
PS ROS LIM
Flame
Sensor
GV
PS RO LIM (OUT) FS
K2 K1
(C) (R)
PRI
230 VAC
SEC
24 VAC
Earth
Ground
Earth
Ground
B GWYR
E_GND
GWYRC
Thermostat
TR
TH
Chassis
Ground
CONNECTION DIAGRAM
LIM (IN)
PS ROS LIM
GV
PS RO FS
K2 K1
(C) (R)
PRI
230 VAC
SEC
24 VAC
Earth
Ground
Earth
Ground
B GWYR
E_GND
GWYRC
Thermostat
TR
TH
Chassis
Ground
Flame
Sensor
CONNECTION DIAGRAM
LIM (OUT) LIM (IN)
CONNECTION DIAGRAM
(C) (R)
PRI
230 VAC
SEC
24 VAC
Earth
Ground
TR
TH
Chassis
Ground
B G
W1 W2
R
Y
G
W2
WRC
Thermostat
Y
PS ROS LIM
GV
PS (IN)HILO ROS FS
K3
K1
Flame
Sensor
LIM (OUT) LIM (IN)
K2
B (COM)
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