Carrier 59SP6A Installation, Start-Up, Operating, Service And Maintenance Instructions page 62

59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
the switch is 0.10 inches of water above the maximum break point of the
switch.
Example: Nominal break point on pressure switch is 0.68-in. W.C. The
minimum break point of the switch is 0.63-in. W.C. The maximum break
point of the switch is 0.73-in. W.C. The maximum make point of the
switch is 0.83-in. W.C.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
There may be more than one electrical supply to the furnace. Check
accessories and cooling unit for additional electrical supplies that must
be shut off during furnace servicing. Lock out and tag switch with a
suitable warning label.
The electrical ground and polarity for 115-v wiring must be properly
maintained. Refer to Fig. 33 for field wiring information and to
for furnace wiring information.
NOTE: If the polarity is not correct, the STATUS LED on the control
will flash rapidly and prevent the furnace from heating. The control
system also requires an earth ground for proper operation of the control
and flame-sensing electrode.
The 24-v circuit contains an automotive-type, 3-amp. fuse located on the
control. See Fig. 39. Any shorts of the 24-v 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 will display
status code 24 when fuse needs to be replaced.
Troubleshooting
Refer to the service label. See Fig.
The Troubleshooting Guide can be a useful tool in isolating furnace
operation problems. Beginning with the word "Start," answer each
question and follow the appropriate arrow to the next item. See
The Guide will help to identify the problem or failed component. After
replacing any component, verify correct operation sequence.
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 indicator in blower
door. The Amber furnace control LED is either ON continuously, rapid
flashing, or a code composed of 2 digits. The first digit is the number of
short flashes, the second digit is the number of long flashes.
For an explanation of status codes, refer to service label located on
blower door or Fig. 68, and the troubleshooting guide which can be
obtained from your distributor.
Retrieving Stored Status Codes
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. Look into blower door indicator for current LED status.
c. Remove blower door.
NOTE: The Status Codes cannot be retrieved by disconnecting the limit
switch. To retrieve Status Codes, follow the procedure below.
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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 75
68.
Fig.
6. Turn SW1-1 "OFF."
7. Amber will be ON continuous which indicates proper operation.
8. Release blower door switch, install blower door and refer to the
SERVICE label on the blower door for more information.
Component Self-Test
Component Test can ONLY be initiated by performing the following:
1. Remove blower door.
2. Shut off the room thermostat or disconnect the "R" terminal lead
off the control board.
3. Reset power and then put setup Switch, SW-1-6 in the "ON"
position to start the component test sequence.
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.
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 ON. The
inducer motor will run for the entire test.
b. The hot surface igniter and the blower motor will be turned ON
for 15 seconds each.
c. When the blower is turned OFF the inducer will be switched to
low speed to 10 seconds.
74.
NOTE: When the component test is completed, one or more status
codes 11 or 25 will flash. See component test section or Service Label
(Fig. 68) for explanation of status codes.
NOTE: To repeat component test, turn setup switch SW1-6 to OFF and
then back ON.
d. Turn setup switch SW1-6 OFF position and reconnect the "R"
thermostat lead.
6. RELEASE BLOWER DOOR SWITCH, reattach wire to "R"
terminal on furnace control board and replace blower 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 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.
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WARNING
!
WARNING
!