5165698-UUM-A-1215
Johnson Controls Unitary Products
5
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.
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, the following visual checks
should be made before contacting your local contractor, dealer, or ser-
vice provider.
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. Refer to Figure 3.
3. Check that the ON/OFF switch on the gas valve is turned to the ON
position. Refer to Figure 3.
4. Check that the furnace blower access panel/door is correctly posi-
tioned. The electrical power supply will be 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 can flash 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 will indicate the failure code. If
the failure is internal to the control, the light will stay on continuously. In
this case, the entire control should be replaced, as the control is not
field repairable.
Flash sequence codes 1 through 10 are as follows: LED will turn “on”
for 1/4 second and “off” for 1/4 second. This pattern will be repeated 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 sec-
ond “off” period.
SLOW GREEN FLASH: Normal operation.
DOUBLE AMBER FLASH: Normal heating operation - Modulating Fur-
nace Models Only
SLOW AMBER FLASH: Normal operation with call for heat.
RAPID RED FLASHES: There is a problem with the operation of this
furnace. Contact your local dealer, contractor or service provider.
FURNACE MAINTENANCE - DEALER/CONTACTOR
The furnace should be cleaned and adjusted by a certified dealer or
qualified 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.
1. The vent terminal.
2. The furnace vent and combustion air intake passageways. Should it
be necessary to service the vent/air intake system, the manufacturer
recommends this service be conducted by a qualified service
agency. The operation of this appliance requires the reassembly
and resealing of the vent/air intake system.
3. The furnace burners, ignitor and flame sensor.
4. The condensate collection and disposal system. If any disassembly
of components containing flue or vent gases is required, a qualified
service agency must perform the service.
5. Heat exchanger assembly.
6. Induced draft motor assembly.
REPLACEMENT PARTS LIST
All components, assemblies, accessories, and replacement parts for
this furnace are available through qualified service agencies. It is not
recommended that the user purchase, install, or replace any compo-
nents 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.
NOTICE
The spring-loaded safety cut-off switch, mounted at the blower deck
will automatically cut 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
should be turned off before servicing.
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 will cause the fan wheel to vibrate.
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