41
441 01 2121 01
control LED is either flashing a heartbeat (bright−dim),
on−solid, or flashing a status code.
For an explanation of status codes, refer to service label
located on blower access door or Figure 51, and the
troubleshooting guide which can be obtained from your
distributor.
See Figure 57, a brief Troubleshooting Guide.
For 2−Stage Variable Speed ECM Controls the stored status
codes will NOT be erased from the control memory, when
115− or 24−v power is interrupted. The control will store up to
the last 7 Status Codes in order of occurrence.
1. To retrieve status codes, proceed with the following:
NOTE: NO thermostat signal may be present at control, and
all blower−OFF delays must be completed.
a. Leave 115−v power to furnace turned on.
b. Remove outer access door.
c. Look into blower access door sight glass for current
amber LED status. Removing blower access door
will open blower access door switch and terminate
115−v power to control so that status code is not
displayed.
d. Remove blower access door.
NOTE: The Status Codes cannot be retrieved by
disconnecting the limit switch or draft safeguard switch. To
retrieve Status Codes, follow the procedure below.
2. Turn Setup Switch, SW1−1 “ON.”
3. Manually close blower access door switch.
4. Control will flash up to 7 Status Codes.
5. The last Status Code, or 8th Code, flashing heartbeat
briefly.
6. Turn SW1−1 “OFF.”
7. The Amber LED will flash heartbeat (bright−dim) con-
tinuously to indicate proper operation.
8. Release blower access door switch, install blower ac-
cess door and replace outer door or refer to the SER-
VICE label on the front of the blower access door for
more information.
Component Self−Test
Component Test can ONLY be initiated by performing the
following:
1. Remove outer access door.
2. Remove blower access door.
3. Remove the wire from the “R” terminal of the control
board.
4. Turn Setup Switch, SW−1−6 “ON.”
5. Manually close blower access door switch.
Blower access door switch opens 115−v power to control. No
component operation can occur unless switch is closed.
Caution must be taken when manually closing this switch for
service purposes.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, or death.
Blower access door switch opens 115−v power to
furnace control. No component operation can occur
unless switch is closed. Exercise caution to avoid
electrical shock from exposed electrical components
when manually closing this switch for service
purposes.
!
WARNING
6. Component Test sequence will function as follows:
a. Inducer motor starts on high−speed and continues
to run until Step (d.) of component test sequence.
b. Hot surface igniter is energized for 15 sec, then
deenergized.
c. Blower operates for 10 sec, then turns off.
d. Inducer motor goes to low−speed for 10 seconds,
then turns off.
e. After component test is completed, one or more
status codes (heartbeat, 2+5, or 4+1) will flash. See
component test section of service label for explana-
tion of status codes.
NOTE: To repeat component test, turn setup switch SW1−6
OFF then back ON.
f. Turn setup switch SW1−6 OFF.
7. RELEASE BLOWER ACCESS DOOR SWITCH, reat-
tach wire to “R” terminal on furnace control board, re-
place blower access door, and replace outer access
door.
CARE AND MAINTENANCE
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never store anything on, near, or in contact with the
furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust
mops, vacuum cleaners, or other cleaning
tools.
2. Soap powders, bleaches, waxes or other
cleaning compounds, plastic or plastic
containers, gasoline, kerosene, cigarette lighter
fluid, dry cleaning fluids, or other volatile fluids.
3. Paint thinners and other painting compounds,
paper bags, or other paper products. Exposure
to these materials could lead to corrosion of the
heat exchangers.
!
WARNING
For continuing high performance and to minimize possible
furnace failure, periodic maintenance must be performed on
this furnace. Consult your local dealer about proper
frequency of maintenance and the availability of a
maintenance contract.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Turn off the gas and electrical supplies to the furnace
before performing any maintenance or service. Follow
the operating instructions on the label attached to the
furnace.
!
WARNING
CARBON MONOXIDE POISONING AND FIRE
HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never operate furnace without a filter or with filter
access door removed.
!
WARNING
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