International comfort products F8MVL Installation Instructions Manual page 44

wiring during installation, service, or maintenance will cause
this fuse to blow. If fuse replacement is required, use ONLY a
3−amp. fuse. The control LED turn off when fuse needs to be
replaced.
Proper instrumentation is required to service electrical
controls. The control in this furnace is equipped with a Status
Code LED (Light−Emitting Diode) to aid in installation,
servicing, and troubleshooting. Status codes can be viewed at
the sight glass in blower access door. The amber furnace
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 56, 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) continu-
ously to indicate proper operation.
8. Release blower access door switch, install blower access
door and replace outer door or refer to the SERVICE label
on the front of the blower access door for more informa-
tion.
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.
WARNING
!
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.
44
6. Component Test sequence will function as follows:
NOTE: To repeat component test, turn setup switch SW1−6
OFF then back ON.
7. RELEASE BLOWER ACCESS DOOR SWITCH, reattach
wire to "R" terminal on furnace control board, replace
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:
8. Spray or aerosol cans, rags, brooms, dust mops,
9. Soap powders, bleaches, waxes or other cleaning
10. Paint thinners and other painting compounds,
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.
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.
Specifications are subject to change without notice.
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) will flash. See com-
ponent test section of service label for explanation of
status codes.
f. Turn setup switch SW1−6 OFF.
WARNING
!
vacuum cleaners, or other cleaning tools.
compounds, plastic or
gasoline, kerosene, cigarette lighter fluid, dry
cleaning fluids, or other volatile fluids.
paper bags, or other paper products. Exposure to
these materials could lead to corrosion of the heat
exchangers.
WARNING
!
WARNING
!
plastic containers,
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