3
some steam may rise from the outdoor unit as the warm
coil causes the melting frost to evaporate. When defrost
is completed, the outdoor fan motor will start, and the
compressor will turn off again. In approximately 30
seconds the compressor will start up again and continue
normal operation.
Operating the Heat Pump for Automatic
Cooling & Heating
1. SetthethermostatsystemswitchtoAUTOandthe
thermostatfanswitchtoAUTO.SeeFigure1.
NOTE:Thermostats will vary. Some models will not
include theAUTO mode, andothers will have the
AUTOinplaceoftheHEATandCOOL,andsome
will include all three.
2. Set the thermostat temperature to the desired heating
and cooling temperature level(s).The outdoor unit
and the indoor blower will then cycle on and off
in either the heating or cooling mode of operation
as required to automatically maintain the indoor
temperature within the desired limits.
Operating the Indoor Blower Continuously
Thecontinuousindoorbloweroperationistypicallyusedto
circulate the indoor air to equalize a temperature unbalance
due to a sun load, cooking, or fireplace operation.
SetthethermostatfanmodetoON(Figure1).Theindoor
blower starts immediately, and will run continually until the
fanmodeisresettoAUTO.
Thecontinuousindoorbloweroperationcanbeobtained
with the thermostat system mode set in any position,
includingOFF.
Shutting the Heat Pump Off
Changethethermostat’ssystemmodetoOFFandthefan
modetoAUTO.SeeFigure1.NOTE:Thesystemwillnot
operate, regardless of the temperature selector setting
TROUBLESHOOTING
BeforeyoucallaTechnician,checkthefollowing:
• Checkthethermostatsetting.Makesurethesystem
mode and temperature settings are correct.
• Checktheelectricalpanelfortrippedcircuitbreakers.
• Checktheltersfordustaccumulation.
• Check the unit and make sure it is clean and not
covered with grass or leaves.
• Iftheitemsabovedon’tresolveyourproblems,then
call your nearest service technician.
HEAT PUMP MAINTENANCE
WARNING:
The T4BD heat pump contains liquid and
gaseous refrigerant under pressure. Installation
and servicing should only be attempted by
qualified, trained personnel thoroughly familiar
with the equipment and safe responsible
refrigerant handling procedures. Failure to
comply with this warning could result in
equipment damage, personal injury, or death.
WARNING:
To prevent electrical shock, personal injury,
or death, disconnect all electrical power to
the unit before performing any maintenance
or service. The unit may have more than one
electrical supply.
Proper maintenance is important to achieve optimum
performancefromtheheatpump.Theabilitytoproperly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills,contactyourdealerformaintenance.Consultyour
local dealer about the availability of maintenance contracts.
Routinemaintenanceshouldincludethefollowing:
Regular Cleaning
CAUTION:
DO NOT touch any of the internal electrical
components while cleaning the unit.
• Theareaaroundtheunitandthevicinityofanyother
appliances must be kept clear and free of combustible
materials, gasoline, and other flammable vapors and
liquids. Do not store or use flammable items such as
gasoline, paint, varnish, or strippers in the vicinity of
the unit.
• Keeptheoutdoorunitclean.Hoseoffperiodicallyand
keep unit fins clear of leaves and grass clippings. Be
careful not to damage the aluminum fins. Clean
the outdoor coil and fins as necessary using a mild
detergent and water. Rinse thoroughly with water.
• Keeptheoutdoorunitclearofobstructions.DONOT
obstructairowwithtallplantsorshrubs.Checkforand
remove any obstructions such as twigs, sticks, etc.
• Inspectthecondensatedrainandoutdoorcoilatthe
beginning of each cooling season. Remove any debris.
• Annually inspectthephysical support of theunitto
ensure that it is physically sound without sagging,
cracks, gaps, etc.
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