Carrier Comfort 50VT C Series Owner's Information Manual

Also see for Comfort 50VT C Series: Installation instructions Installation instructions

5Refrigerant CircuitThe refrigerant circuit is difficult to check for leaks without theproper equipment. If inadequate cooling is suspected, contact yourlocal dealer for service.EXPLOSION, BURN AND ENVIRONMENTALHAZARDFailure to follow this warning could result in personalinjury, death or property damage.System under pressure. Relieve pressure and recover allrefrigerant before system repair or final unit disposal. Useall service ports and open all flow--control devices,including solenoid valves.! WARNINGUnit PanelsAfter performing any maintenance or service on the unit, be sureall panels are fastened securely in place to prevent rain fromentering unit cabinet and to prevent disruption of the correct unitairflow pattern.Regular Dealer MaintenanceIn addition to the type of routine maintenance you might be willingto perform, your unit should be inspected regularly by a properlytrained service technician. An inspection (preferably each year, butat least every other year) should include the following:1. Inspection and, if required, cleaning of the outdoor andindoor coils.2. Inspection and, if required, cleaning of the indoor coil drainpan.3. Inspection and cleaning of blower wheel housing andmotor.4. Inspection of all supply and return air ducts for leaks,obstructions, and insulation integrity. Any problems foundshould be resolved at this time.5. Inspection of the unit base to ensure that no cracks, gaps,etc., exist which may cause a hazardous condition.6. Inspection of the unit casing for signs of deterioration.7. Inspection of all electrical wiring and components to assureproper connection.8. Inspection for leaks in the refrigerant circuit. Pressure andtemperature check to determine appropriate refrigerantcharge.9. Operational check of the unit to determine workingconditions. Repair or adjustment should be made at thistime.Your servicing dealer may offer an economical service contract thatcovers seasonal inspections. Ask for further details.Complete service instructions can be found in the unit Installation,Start--up and Service Instructions.Warranty CertificateYour unit has a limited warranty. Be sure to read the warrantycarefully to determine the coverage for your unit.Before you call for service......check for several easily solved problems.If insufficient heating or cooling is suspected:( ) Check for sufficient airflow. Check the air filter for dirt. Checkfor blocked return or supply air grilles. Be sure they are open andunobstructed. If these checks do not reveal the cause, call yourservicing dealer.If your unit is not operating at all, check the following list foreasy solutions:( ) Check to be sure that your thermostat temperature selector isset below the indoor temperature during the cooling season orabove the indoor temperature during heating season. Be sure theSYSTEM switch or MODE control is in the COOL or HEAT andnot OFF.( ) If your unit still fails to operate, call your servicing dealer fortroubleshooting and repairs. Specify the model and serial numbersof your unit. (Record them in this manual in the space provided.) Ifthe dealer knows exactly which unit you have, he may be able tooffer suggestions over the phone, or save valuable time throughknowledgeable preparation for the service call.In Case of TroubleIf you perform the steps above and unit performance is stillunsatisfactory, shut off the unit and call your dealer.

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