1010352-UUM-N-0121
Johnson Controls Ducted Systems
5
Call a certified dealer or servicing contractor to check or clean your fur-
nace, or for more information if you have questions about the operation
of your furnace.
If all components appear to be in good operating condition, replace the
furnace access panels/doors. Turn
on
the gas and electrical power sup-
plies to the furnace, and set the thermostat to the preferred tempera-
ture.
Cleaning your filter
High-velocity filters may be cleaned with a vacuum cleaner or washed
with a garden hose. Be sure to shake off excess water and allow the fil-
ter to completely dry before re-installing the filter.
Replace throwaway filters with the same size new filters. Throwaway fil-
ters may be replaced with cleanable filters at this time.
Blower care
Even with good filters properly in place, blower wheels and motors will
become dust laden after months of operation. The entire blower assem-
bly should be inspected annually. This service must be performed by a
qualified service agency.
Note:
The spring-loaded safety cut-off switch, mounted at the blower
deck, automatically cuts off the electrical power supply to the furnace
when the furnace blower access panel/door is removed. As a safety
precaution, all electrical power and the gas supply to the furnace must
be turned off before servicing.
Motor lubrication
The motors in these furnaces are permanently lubricated and do not
require periodic oiling.
SECTION V: SERVICE INFORMATION
Troubleshooting problems
If your furnace is not operating correctly, make the following visual
checks before contacting your local contractor, dealer, or service pro-
vider:
1. Check that electrical power to the furnace is turned on.
2. Check that the manual gas shut-off valve in the gas piping supply is
turned to the
on
position. See Figure 6.
3. Check that the
on/off
switch on the gas valve is turned to the
on
position. See Figures 7 to 9.
4. Check that the furnace blower access panel/door is correctly posi-
tioned. The electrical power supply is cut off if this door is removed.
Furnace control diagnostics
The furnace has built-in, self-diagnostic capability. If a system problem
occurs, a blinking LED shows a fault code. The LED flashes red, green,
or amber to indicate various conditions. It is located behind a clear view
port in the blower compartment door.
The control continuously monitors its own operation and the operation
of the system. If a failure occurs, the LED indicates the failure code. If
the failure is internal to the control, the light stays on continuously. In
this case, the entire control must be replaced, as the control is not field
repairable.
Flash sequence codes 1 through 10 are as follows: LED turns on for
1/4 s and off for 1/4 s. This pattern repeats the number of times equal to
the code. For example, six
on
flashes equals a number 6 fault code. All
flash code sequences are broken by a 2-s
off
period.
Slow green flashes:
Normal operation.
Double amber flashes:
Normal heating operation - Modulating furnace
models only
Slow amber flashes:
Normal operation with call for heat.
Rapid red flashes:
There is a problem with the operation of this fur-
nace. Contact your local dealer, contractor, or service provider.
Furnace maintenance - dealer/contractor
The furnace must be cleaned and adjusted by a certified dealer or qual-
ified service contractor once a year or before the start of every heating
season. The following items must be cleaned and serviced or replaced
if there are signs of deterioration:
• The vent terminal.
• The furnace vent and combustion air intake passageways.
Should it be necessary to service the vent/air intake system, this
service must be conducted by a qualified service agency. The
operation of this appliance requires the reassembly and resealing
of the vent/air intake system.
• The furnace burners, ignitor, and flame sensor.
• The condensate collection and disposal system. If any disassem-
bly of components containing flue or vent gases is required, a
qualified service agency must perform the service.
• Heat exchanger assembly.
• Induced draft motor assembly.
Replacement parts list
All components, assemblies, accessories, and replacement parts for
this furnace are available through qualified service agencies. The user
must not purchase, install, or replace any components of this furnace.
Contact your local contactor, dealer, or service provider for additional
information.
Wiring diagram
The unit wiring diagram may be found on the inside of one of the access
panels on the furnace. It is intended for reference only. If service is
required, contact your local contactor, dealer, or service provider.
WARNING
Make sure you do not move the clip on weight on the indoor
fan wheel when cleaning the wheel. This weight is used to
balance the wheel. Moving the weight causes the fan wheel
to vibrate.
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