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Refrigerant
Circuit
Therefrigerantcircuitisdifficulttocheckforleakswithouttheprop-
erequipment.Ifinadequatecoolingissuspected,contactyour local
dealer for service.
EXPLOSION, BURN AND ENVIRONMENTAL
HAZARD
Failure to follow thiswarning could result in personalinjury,
death or property damage.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unitdisposal. Useall
service ports and open all flow--control devices, including
solenoid valves.
!
WARNING
Unit Panels
Afterperforming any maintenanceorserviceontheunit,besureall
panels are fastened securely in place to prevent rain from entering
unitcabinetandtopreventdisruptionofthecorrectunitairflowpat-
tern.
Regular Dealer Maintenance
In addition to t hetype of routine maintenance you 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,if required,cleaningof theindoorcoildrain
pan.
3. Inspectionandcleaningofblowerwheelhousingandmotor.
4. Inspection of all supply--air 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 of deterioration.
7. Inspection of all electricalwiring and components to assure
proper connection.
8. Inspection for leaksin therefrigerant circuit. Pressure check
to determine appropriate refrigerant charge.
9. Inspection of compressor oil level by service person to
ensureproperoillevelismaintainedinthecompressorwhen
it is installed and running.
10. Operational check of the unit to determine working
conditions.Repairoradjustmentshouldbemadeatthistime.
Your servicingdealermayofferan economicalservicecontractthat
covers seasonal inspections. Ask for further details.
Completeservice instructionscan befound 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 s ufficient a irflow . Check the air filter for dirt. Check
for blocked return--air or supply--air grilles. Be sure they are open
and unobstructed.If thesechecksdo not reveal thecause, call your
servicing dealer.
If your unit is not operating at all, check the following list for
easy solutions:
( ) Check to be sure that the temperature specified by your User
Interfaceissetbelowtheindoortemperatureduringthecoolingsea-
sonorabovetheindoortemperatureduring heating season.Besure
the User Interface is set to 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.(Record them inthismanualin thespace provided.)If
the dealer knows exactly which unit you have, he may be able to
offer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
In Case of Trouble
Ifyouperformthestepsaboveand unitperformanceis stillunsatis-
factory, shut off the unit and call your dealer.
HEA T ING & COOLING
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 CarrierCo rporation Printed inthe U.S.A. EditionDate: 06/09
Catalog No: OM50GL---C01
Replaces: OM50--- C1
Manufacturer reserves theright tochange,at anytime, specifications anddesign withoutnotice andwithout obligation.