39
39
Troubleshooting
Electrostatic Discharge (ESD) Precautions
NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affect
electrical components.
Use the following precautions during furnace installation and servicing to protect the integrated ignition control from
damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid
exposing the integrated ignition control 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 ignition control or any wire connected to the con-
trol prior to discharging your body’s electrostatic charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnaces near the control. Any tools held in a person’s hand
during grounding will be discharged.
3. Service integrated ignition control 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 ob-
jects, 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 in-
stalling the control on a furnace. Return any old or new controls to their containers before touching any un-
grounded object.
Furnace Lockout
Furnace lockout results when a furnace is unable to
achieve ignition after three attempts, or when it has lost
flame five times during a single call for heat. It is charac-
terized by a non-functioning furnace and a one flash
diagnostic LED code. If the furnace is in “lockout”, it will (or
can be) reset in any of the following ways.
1. Automatic reset. The integrated ignition control will
automatically reset itself and attempt to resume nor-
mal operations following a two hour lockout period.
2. Manual power interruption. Interrupt 115 volt power
to the furnace for 0 - 30 seconds.
3. Manual thermostat cycle. Lower the thermostat so
that there is no longer a call for heat then reset to
previous setting. Interrupt thermostat signal to the
furnace for 0 - 30 seconds.
NOTE: If the condition which originally caused the
lockout still exists, the control will return to lockout.
Refer to
Diagnostic Chart
section for aid in determining
the cause.
Diagnostic Chart
WARNING
To avoid electrical shock, injury or death, disconnect
electrical power before performing any service or
maintenance.
For assistance in determining the source of unit opera-
tional problems, refer to the troubleshooting chart on the
following pages The red diagnostic LED blinks to assist in
troubleshooting the unit. The number of blinks refers to a
specific fault code.
