Carrier 48HC User's Information Manual page 8

Condenser Fan
WARNING
!
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury.
Do not poke sticks, screwdrivers, or other object into
revolving fan blades.
Electrical Controls and Wiring
Ensure wires do not contact refrigerant tubing or sharp
edges. Electrical controls are difficult to check without
proper instrumentation. If inadequate cooling is suspected,
contact your qualified local dealer for service.
Combustion Area and Vent System
The combustion area and vent system should be visually
inspected before each heating season.
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury equipment damage.
If your unit makes any unusual or especially loud
noises during heating, shut down the heating section
and call your qualified service technician.
Proceed as follows to inspect the combustion area and
power- - venting system of your unit.
S Turn off gas supply to your unit.
S Turn off electrical power to your unit; install lockout tag.
S Remove gas component access panel.
S Using a flashlight, carefully inspect the burner areas for
dirt, soot, or scale.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to
equipment.
If dirt, soot, rust or scale accumulations are found, call
your service technician and do not operate your
heating section.
S When you have completed your inspection, follow the
start- - up procedures in this manual to restore your unit
to operation.
WARNING
!
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury.
Components in heat section may be hot after unit has
been started up. When observing flame, be careful not
to get close to or touch heating components.
S Observe unit heating operation. Watch the burner flame
to see if it is bright blue. If you observe a suspected
malfunction or that the burner flame is not bright blue,
shut down the unit and call your dealer.
S Replace gas component access panel.
ComfortLink Control Alarm Status
The Scrolling Marquee display incorporates an Alarm
Status LED that turns on to indicate an active alarm or
alert. These alarms and alerts are in addition to those that
re indicated by the Integrated Gas Control (IGC). The
ComfortLink control active alarm codes and alarm history
can be viewed with the Scrolling Marquee or other Carrier
R
Comfort Network (CCN) devices. Alarms may also be
configured to broadcast automatically on CCN. If the unit
will not operate and the Alarm Status LED is on, contact
the local dealer and request service.
Integrated Gas Controller (IGC)
The IGC board incorporates an LED that emits a flashing
light to indicate an alarm code. If the furnace section will
not operate and the LED is flashing a code (1 to 9 flashes
in succession), contact your dealer and request service.
NOTE: Make note of the flash code before powering off
the unit. The alarm codes clear after power cycle.
Unit Panels
After performing any maintenance or service on the unit,
be sure all panels are securely fastened in place to prevent
rain from entering unit cabinet and to prevent disruption
of the correct unit airflow pattern.
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