Manuals / Thermo Products / Household Appliance / Furnace

Thermo Products CMC1-75DV3N Filter Maintenance Procedure, Filter Replacement, Diagnostic Features

Models: CMC1-75DV3N CMA3-75D36N CMA3-50D36N CMC1-75D36N CMC1-50D36N CMC1-50DV3N

1 65
Download 65 pages 47.5 Kb
Page 53
Image 53

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

51

Page 52 Page 54
Page 53
Image 53
Thermo Products CMC1-75DV3N Filter Maintenance Procedure, Filter Replacement, Viii. Troubleshooting, Diagnostic Features
Page 52 Page 54

FAQ

How do I clean the filter?

To clean the filter, remove it from the front door of the furnace and vacuum, rinse, hose, or dip it in a detergent solution. Ensure the filter is completely dry before replacing it with the retaining rod.

What type of filter should I use for replacement?

Replace the filter with the same size and type as originally supplied with the furnace to ensure efficient operation.

What do the flashing lights on the control indicate?

The flashing lights on the control indicate different failure statuses. Refer to the diagnostic features for the specific flash-pause sequences and failure statuses.