Filter
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All installations and services must be performed by qualified service personnel.
FILTER MAINTENANCE PROCEDURE
The filter is located inside front door of the CMA/CMC. Remove filter retaining rod
and remove dirty filter. Clean the filter by vacuuming, rinsing with tap water,
hosing or dipping in an ordinary detergent solution. After cleaning, replace the
completely dry filter and retain with retaining rod. If the filter has a mesh, the
mesh side of the filter must be towards the furnace.
FILTER REPLACEMENT
Should the filter require replacement, replace with like size and type filter as
originally supplied with furnace.
IMPORTANT: Remind homeowner of importance of monthly filter inspections
during the heating season to ensure efficient and trouble-free operation of their
furnace.
VIII. TROUBLESHOOTING
NOTICE: BEFORE TROUBLESHOOTING, FAMILIARIZE YOURSELF WITH THE
START UP AND CHECKOUT PROCEDURE.
ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED
HEATING CONTRACTORS.
To assist you in troubleshooting this furnace, it is equipped with an integrated
ignition control with diagnostics. These diagnostics evaluate what control system has
experienced a failure and will activate a flashing light on the control in different
sequences to help pinpoint the failure which has occurred.
Note – check diagnostic code through view port prior to removing access door.
DIAGNOSTIC FEATURES
The 50A65 control used on this furnace continuously monitors its operation and the
operation of the system. If a failure occurs, the LED light on the control will flash a
code. If the failure is internal to the control, the light will stay on continuously.
In this case, the entire control should be replaced, as the control is not field-
repairable.
If the sensed failure is in the system (external to the control), the LED will flash in the
following flash-pause sequences to indicate failure status (each flash will last
approximately 0.25 seconds, and each pause will last approximately 2 seconds).
1 flash, then pause system locked
2 flashes, then pause pressure switch stuck closed
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