Amana GUCA045AX30 Service Instructions Manual page 49

Troubleshooting
Electrostatic Discharge (ESD) Precautions
Note: Discharge body's static electricity before touching
unit. An electrostatic discharge can adversely affect elec-
trical components.
Use the following precautions during furnace installation
and servicing to protect the integrated control module from
damage. By putting the furnace, the control, and the per-
son at the same electrostatic potential, these steps will
help avoid exposing the integrated control module to elec-
trostatic discharge. This procedure is applicable to both in-
stalled 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
furnaces near 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 un-
grounded object.
SYSTEM OPERATION
Diagnostic Chart
To avoid electrical shock, injury or death, disconnect
electrical power before performing any service or main-
tenance.
Refer to the troubleshooting chart for assistance in deter-
mining the source of unit operational problems.
Resetting From 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 characterized 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 control module will au-
2. Manual power interruption. Interrupt 115 volt power to
3. Manual thermostat cycle. Lower the thermostat so that
Note: If the condition which originally caused the lockout
still exists, the control will return to lockout. Refer to Trouble-
shooting - Diagnostic Chart on pages 50 and 51 for aid in
determining the cause.
WARNING
tomatically reset itself and attempt to resume normal
operations following a one hour lockout period.
the furnace for 0 - 20 seconds.
there is no longer a call for heat then reset to previous
setting. Interrupt thermostat signal to the furnace for 0 -
20 seconds.
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