IMPORTANT INFORMATION
2
IMPORTANT NOTICES
RECOGNIZE SAFETY SYMBOLS, WORDS AND
LABELS
Pride and workmanship go into every product to provide our
customers with quality products. It is possible, however, that
during its lifetime a product may require service. Products
should be serviced only by a qualified service technician who
is familiar with the safety procedures required in the repair
and who is equipped with the proper tools, parts, testing in-
struments and the appropriate service manual.
REVIEW ALL
SERVICE INFORMATION IN THE APPROPRIATE SERVICE
MANUAL BEFORE BEGINNING REPAIRS.
WARNING
HIGH VOLTAGE
Disconnect ALL power before servicing or in-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper-
ty damage, personal injury or death.
WARNING
Do not connect to or use any device that is not designed
certified by the manufacturer for use with this unit. Serious
property damage, personal injury reduced unit performance
and/or hazardous conditions mat result from the use of such
non-approved devices.
OUTSIDE THE U.S.,
call 1-713-861-2500
.
(Not a technical assistance line for dealers.) Your telephone company will bill you for the call.
WARNING
To prevent the risk of property damage, personal injury, r
death, do not store combustible materials or use gasoline
or other flammable liquids or vapors in the vicinity of this
appliance.
Notice: Inverter H/P models can only be matched
with an AVPEC* air handler pr TXV-V** expansion
valve kit. Damage resulting from operation with any
other combination is not covered by the warranty.
SAFE REFRIGERANT HANDLING
While these items will not cover every conceivable situa-
tion, they should serve as a useful guide.
WARNING
Refrigerant are heavier than air. They can “push out” the
oxygen in your lungs or in any enclosed space. To avoid pos-
sible difficulty in breathing or death.
•
Never purge refrigerant into an enclosed room or
space. By law, all refrigerants must be reclaimed.
•
If an indoor leak is suspected, thoroughly ventilate the
area before beginning work.
•
Liquid refrigerant can be very cold. To avoid possible
frost bite or blindness, avoid contact and wear gloves
and goggles. If liquid refrigerant does contact your
skin or eyes, seek medical help immediately.
•
Always follow EPA regulations. Never burnt refriger-
ant, as poisonous gas will be produced.
WARNING
The United States Environmental Protection Agency (“EPA”)
has issued various regulations regarding the introduction
and disposal of refrigerants introduced into this unit. Fail-
ure to follow these regulations may harm the environment
and can lead to the imposition of substantial fines. These
regulations may vary by jurisdiction. Should questions arise,
contact your local EPA office.
DUCT STATIC PRESSURES AND/OR STATIC
PRESSURE DROP ACROSS COILS ........................ 22
AIR HANDLER EXTERNAL STATIC .......................... 22
COIL STATIC PRESSURE DROP .............................. 22
INDOOR UNIT TROUBLESHOOTING ...................... 23
DIAGNOSTIC CODES ................................................ 25
AIR HANDLER TROUBLESHOOTING MATRIX ....... 26
AIR HANDLER DISPLAY ............................................ 28
SETTING THE MODE DISPLAY ................................ 36
7 - SEGMENT DISPLAY .............................................. 42
TROUBLESHOOTING .................................................
WIRING DIAGRAMS .................................................... 58
ACCESSORIES ........................................................... 60
CHECKING HEATER LIMIT CONTROL(S)
(OPTIONAL ELECTRIC HEATERS) ......................... 61
ELECTRIC HEATER OPTIONAL ITEM ..................... 61
CHECKING HEATER FUSE LINK (OPTIONAL
ELECTRIC HEATERS) ................................................ 62
