31
LED will flash the Fault Code History (up to 5 fault codes
from newest to oldest)
Fault Code Display Means:
Multi-Color LED (green, am-
ber, red).
C
LEAR
F
AULT
M
EMORY
Function:
When the SW1 button is pressed and held for
an extended period (more than 5 seconds, less than 10
seconds), the control erases the stored fault code history.
Operation:
The control must be powered and the ther-
mostat satisfied (no call for heat or cool). Depress and
hold the SW1 button for at least 5 seconds (but not more
than 10 seconds), until the LED flashes a rapid green,
then release. The fault code history will be erased.
LED Display Indication:
Rapid Green Flash
R
ESETTING
F
ROM
L
OCKOUT
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
TURN
OFF
POWER
TO
THE
FURNACE
BEFORE
CHANGING
SPEED
TAPS
.
WARNING
Furnace lockout results when a furnace is unable to achieve igni-
tion after three attempts during a single call for heat. It is
characterized by a non-functioning furnace and a fault code
displayed. If the furnace is in “lockout”, it will (or can be) reset
in any of the following ways.
1. Automatic reset. The integrated control module will
automatically reset itself and attempt to resume normal
operations following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to
the furnace.
3. Manual thermostat cycle. Lower the thermostat so that
there is no longer a call for heat for 1 -20 seconds then
reset to previous setting.
NOTE:
If the condition which originally caused the lockout still
exists, the control will return to lockout. Refer to the
Troubleshooting Chart
for aid in determining the cause.
M
AINTENANCE
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
PERFORMING
ANY
SERVICE
OR
MAINTENANCE
.
WARNING
A
NNUAL
I
NSPECTION
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season. This will
ensure that all furnace components are in proper working
order and that the heating system functions appropriately.
Pay particular attention to the following items. Repair or
service as necessary.
•
Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections
at and internal to the furnace.
•
Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
•
Burners. Check for proper ignition, burner flame,
and flame sense.
•
Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
•
Wiring. Check electrical connections for tightness
and/or corrosion. Check wires for damage.
•
Filters.
F
ILTERS
F
ILTER
M
AINTENANCE
Improper filter maintenance is the most common cause of
inadequate heating or cooling performance. Filters should be
cleaned (permanent) or replaced (disposable) every two months
or as required. When replacing a filter, it must be replaced
with a filter of the same type and size.
F
ILTER
R
EMOVAL
Depending on the installation, differing filter arrangements
can be applied. Filters can be installed in either the central
return register or a side panel external filter rack (upflow
only). A media air filter or electronic air cleaner can be used
as an alternate filter. Follow the filter sizes given in the
Recommended Minimum Filter size table to ensure proper unit
performance.
To remove filters from an external filter rack in an upright
upflow installation, follow the directions provided with ex-
ternal filter rack kit.
H
ORIZONTAL
U
NIT
F
ILTER
R
EMOVAL
Filters in horizontal installations are located in the central
return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or
ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.