39
integrated control module to electrostatic discharge. This procedure is applicable to both installed and uninstalled (ungrounded)
furnaces.
1. Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to
discharging your body’s electrostatic charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnace away from the control. Any tools held in a person’s hand during
grounding will be discharged.
3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge
your body with static electricity; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come
in contact with an ungrounded object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the
control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.
D
IAGNOSTIC
C
HART
Refer to the
Diagnostic Codes chart
for assistance in determining the source of unit operational problems.
FAULT RECALL (96% Models Only)
The last five fault codes stored can be displayed on the diagnostic LED. When the control is in standby mode (no call for
heat or cool), press the FAULT RECALL switch for approximately two seconds or until the diagnostic LED turns off. Release
the switch and the LED will remain off for two seconds. Then the fault codes will display beginning with the most recent
fault first with a two second pause between codes. After the stored fault codes have all displayed, the LED will remain off
for two seconds and then turn on to indicate return to normal status. While displaying the stored fault codes, the control will
ignore any new call for heat, cool or fan.
FAULT CODE RESET (96% Models Only)
The stored fault codes can be erased from memory. When the control is in standby mode (no call for heat or cool), press the
FAULT RECALL switch for five to ten seconds or until the diagnostic LED begins to rapid flash. When the switch is released,
the LED will turn off for two seconds to indicate the codes are erased. After two seconds the LED will turn on to indicate
return to normal status. If the switch is held pressed for over ten seconds the rapid flash will stop and the LED will be on to
indicate return to normal status.
R
ESETTING
F
ROM
L
OCKOUT
Furnace lockout results when a furnace is unable to achieve ignition after three attempts during a single call for heat. It is character-
ized 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
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.
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
PERFORMING
ANY
SERVICE
OR
MAINTENANCE
.
WARNING
