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Indoor and Outdoor
Coils
Cleaning ofthe coilsshould only be doneby qualified serviceper-
sonnel. Contact your dealer for the required annual maintenance.
Condensate
Drain
The drain pan and condensate drain line should be checked and
cleanedatthesametimethecoolingcoilsarecheckedbyyourdeal-
er.
Compressor
Allcompressorsarefactoryshippedwithanormalchargeofthecor-
rect type and quantity of refrigeration grade oil. A c ompressor
should rarely require additional oil.
Condenser
Fan
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failureto follow this warning could resultin personal injury,
death or property damage.
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades.
!
WARNING
The fan must bekept freeof allobstructionsto ensure propercool-
ing. Contact your dealer for any required service.
Electrical Controls and W
iring
Electricalcontrolsaredifficulttocheckwithoutproperinstrumenta-
tion. If there are any discrepancies in the operating cycle, c ontact
your local dealer and request service.
Refrigerant
Circuit
Therefrigerantcircuitisdifficulttocheckforleakswithouttheprop-
erequipment.Ifinadequatecoolingissuspected,contactyourlocal
dealer for service.
EXPLOSION, BURN AND ENVIRONMENTAL
HAZARD
Failureto follow this warning could resultin personal injury,
death or property damage.
System under pressure. Relieve pressure and recover all
refrigerant before system repair orfinal unit disposal. Use all
service ports and open all flow--control devices, including
solenoid valves.
!
WARNING
Unit Panels
Afterperforminganymaintenanceorserviceontheunit,besureall
panels are fastened securely in place to prevent rain from entering
unitcabinetandtopreventdisruptionofthecorrectunitairflowpat-
tern.
Regular Dealer Maintenance
In addition to thetype of routinemaintenanceyou might bewilling
to perform, your unit should be inspected regularly by a properly
trained service technician. An inspection (preferably each year,but
at least every other year) should include the following:
1. Inspection and, if required, cleaning of the outdoor and
indoor coils.
2. Inspection and,ifrequired,cleaningof theindoor coildrain
pan.
3. Inspectionandcleaningofblowerwheelhousingandmotor.
4. Inspection of all supply and return air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at this time.
5. Inspectionoftheunitbasetoensurethatnocracks,gaps,etc.,
exist which may cause a hazardous condition.
6. Inspection of the unit casing for signs ofdeterioration.
7. Inspection ofallelectrical wiring and components to assure
proper connection.
8. Inspection for leaks in the refrigerant circuit. Pressure and
temperature check to determine appropriate refrigerant
charge.
9. Operational check of the unit to determine working
conditions.Repairoradjustmentshouldbemadeatthistime.
Yourservicingdealermayofferaneconomicalservicecontractthat
covers seasonal inspections. Ask for further details.
Completeservice instructionscan be found in the unitInstallation,
Start--up and Service Instructions.
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. Check
forblockedreturnorsupplyairgrilles.Besuretheyareopenandun-
obstructed.Ifthesechecksdo notrevealthecause,call yourservic-
ing dealer.
If your unit is not operating at all, check the following list for
easy solutions:
( )Checktobesurethatyourthermostattemperatureselectorisset
below the indoor temperature during the cooling season or above
theindoortemperatureduringheatingseason.BesuretheSYSTEM
switch or MODE control is in the COOL or HEAT and not OFF.
( ) If your unit still fails to operate, call your servicing dealer for
troubleshooting and repairs. Specify the modeland serial numbers
of yourunit.(Recordthem inthismanualin thespaceprovided.)If
thedealerknowsexactlywhichunityouhave,hemaybeabletoof-
fer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
In Case of Trouble
Ifyouperformthestepsaboveandunitperformanceisstillunsatis-
factory, shut off the unit and call your dealer.
HEA T ING & C OOL ING
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under the
“Heating Equipment” or “Air Conditioning Contractors & Systems” heading for dealer listing by brand name.
Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part.
Copyright2009 CarrierCorporation Printedi n theU.S.A.
EditionDate: 06/09
Catalog No: OM50JZ---C01
Re
p
laces: OM50---C2
Manufacturer reservesthe righttochange,at anytime,specifications anddesignwithout notice andwithout obligation.