987158-UIM-B-1013
Johnson Controls Unitary Products
31
DIAGNOSTIC FAULT CODE STORAGE AND
RETRIEVAL
The control in this furnace is equipped with memory that will store up to
five error codes to allow a service technician to diagnose problems
more easily. This memory will be retained even if power to the furnace
is lost.
Only a qualified service technician should use this feature.
The control stores up to five separate error codes. If more than five
error codes have occurred since the last reset, only the five most recent
will be retained. The furnace control board has a button, labeled “
LAST
ERROR”
that is used to retrieve error codes. This function will only
work if there are no active thermostat signals. So any call for heating,
cooling or continuous fan must be terminated before attempting to
retrieve error codes.
To retrieve the error codes, push the
LAST ERROR
button. The
LED
on
the control will then flash the error codes that are in memory, starting
with the most recent. There will be a two-second pause between each
flash code. After the error codes have all been displayed, the
LED
will
resume the normal slow green flash after a five second pause. To
repeat the series of error codes, push the button again.
If there are no error codes in memory, the
LED
will flash two green
flashes. To clear the memory, push the
LAST ERROR
button and hold it
for more than five seconds. The
LED
will flash three green flashes
when the memory has been cleared, then will resume the normal slow
green flash after a five-second pause.
SECTION X: REPLACEMENT PARTS LIST
DESCRIPTION
MOTOR
MOTOR, DIRECT DRIVE BLOWER
BLOWER, COMBUSTION
ELECTRICAL
CAPACITOR, RUN
SWITCH, LIMIT
CONTROL, FURNACE
IGNITER
SENSOR, FLAME
SWITCH, PRESSURE
SWITCH, DOOR
TRANSFORMER
VALVE, GAS
CONTROL, TEMPERATURE
SENSOR, PRESSURE
SENSOR, THERMISTOR
AIR MOVING
HOUSING, BLOWER
WHEEL, BLOWER
FABRICATED PARTS
BAFFLE, FLUE
BURNER, MAIN GAS
BRACKET, IGNITER
SHELF, BLOWER
RAIL, BLOWER (2 Req’d)
FABRICATED PARTS Continued
BRACKET, BLOWER TRACK (2 Req’d)
HEAT EXCHANGER ASS’Y
MANIFOLD, GAS
PAN, BOTTOM
PANEL, TOP
PANEL, DOOR (2 Req’d)
VENT PAN, COMBUSTION (w/Gasket)
PANEL, BLOCKOFF
LO-NOX SCREEN (L-Models Only)
MISCELLANEOUS
ORIFICE, BURNER (Natural #45)
SIGHT GLASS, OVAL (2 Req’d)
GASKET, FOAM (Door) (1.5 ft req’d)
GASKET, INTAKE PAN
PLUG, VENT HOLE
BRACKET, DOOR
WIRING HARNESS
FERRULE (3 Req’d)
GROMMET (3 Req’d)
MOTOR MOUNT
HOSE ASSY, VACUUM
PLUG, ID (Control Board)
KNOB, QUARTER TURN (4 Req’d)
UNION
DIAGRAM, WIRING
DESCRIPTION
REPLACEMENT PART CONTACT INFORMATION
This is a generic parts list. To request a complete parts list, refer to the contact information below:
• Visit our website at www.source1parts.com for the following information:
1. Search for a part or browse the catalog.
2. Find a dealer or distributor.
3. Customer Service contact information.
a. Click on the “Brand Links” button
b. Click on the “Customer Service” button
• You can contact us by mail. Just send a written request to:
Johnson Controls Unitary Products
Consumer Relations
5005 York Drive
Norman, OK 73069
