Carrier 59MN7A Installation, Start-Up, Operating And Service And Maintenance Instructions page 80

2. Turn Setup Switch, SW1- -1 "ON."
3. Manually close blower door switch.
4. Control will flash up to 7 Status Codes.
5. The last Status Code, or 8th Code, will be Code 11.
6. Turn SW1- -1 "OFF."
7. A continuously- -lit Amber LED will appear and indicates
proper operation.
8. Release blower door switch, install blower door and refer
to the SERVICE label on the control door for more inform-
ation.
Component Self- - Test
Component Test can ONLY be initiated by performing the
following:
1. Remove blower door.
2. Remove the wire from the "R" terminal of the control
board.
3. Turn Setup Switch, SW- -1- -6 "ON."
4. Manually close blower door switch.
Blower 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 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.
5. Component Test sequence will function as follows:
a. The furnace control CPU turns the inducer motor IDM ON
at medium speed and keeps it ON through Step d.
b. The furnace control CPU will test communication with the
modulating gas valve GV.
c. After waiting 15 seconds the furnace control CPU turns the
hot surface igniter ON for 15 seconds, then OFF.
d. The furnace control CPU then turns the blower motor
BLWM ON at mid-range airflow for 15 seconds, then OFF.
e. After shutting the blower motor BLWM OFF the furnace
control CPU shuts the inducer motor IDM OFF.
NOTE: The EAC terminals are energized when the blower is
operating.
After the component test is completed, 1 or more status codes (11,
25, 35, 41, or 42) will flash. See Service Label on control door or
Service/Status Code Instructions for explanation of status codes.
NOTE: To repeat component test, turn setup switch SW1-6 to
OFF and then back ON.
f. Turn setup switch SW1- -6 OFF.
6. RELEASE BLOWER DOOR SWITCH, reattach wire to
"R" terminal on furnace control board and replace blower
door.
Care and Maintenance
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never store flammable or combustible materials 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.
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.
WARNING
!
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 and
install lockout tag 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 filtration device
installed. Never operate a furnace with filter or filtration
device access doors removed.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts, and servicing furnaces.
The minimum maintenance on this furnace is as follows:
1. Check and clean air filter each month or more frequently if
required. Replace if torn.
2. Check blower motor and wheel for cleanliness each heating
and cooling season. Clean as necessary.
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