Troubleshooting - Amana CVC96 Installation Instructions Manual

Pressure Switches
The pressure switches are normally-open (closed during
operation) negative air pressure-activated switches. They
monitor the airflow (combustion air and flue products)
through the heat exchanger via pressure taps located on
the induced draft blower and the coil front cover. These
switches guard against insufficient airflow (combustion
air and flue products) through the heat exchanger and/or
blocked condensate drain conditions.
Flame Sensor
The flame sensor is a probe mounted to the burner/
manifold assembly which uses the principle of flame
rectification to determine the presence or absence of flame.
Burner Flame

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 control module
from damage. By putting the furnace, the control, and the
person at the same electrostatic potential, these steps
will help avoid exposing the 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.
Figure 68
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.
Diagnostic Chart
High voltage!
To avoid personal injury or death due to
electrical shock, disconnect electrical
power BEFORE performing any service or
maintenance.
Refer to the Troubleshooting Chart in the back of this
manual for assistance in determining the source of unit
operational problems. The 7-segment LED displays will
display an error code that may contain a letter and number.
The error code may be used to assist in troubleshooting
the unit.
Resetting From Lockout
Furnace lockout results when a furnace is unable to
achieve ignition after three attempts during a single call for
heat. It is characterized by a non-functioning furnace and
an EE0 code displayed on the 7-segment display. 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.
41
WARNING