420706-UUM-C-0112
Johnson Controls Unitary Products
5
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 manufac-
turer 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 disassem-
bly 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.
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.
