IMPORTANT INFORMATION
2
IMPORTANT NOTICES FOR CONSUMERS
AND SERVICERS
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.
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.
HIGH VOLTAGE !
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
.
M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
D
O
NOT
CONNECT
TO
OR
USE
ANY
DEVICE
THAT
IS
NOT
DESIGN
CERTIFIED
BY
THE
MANUFACTURER
FOR
USE
WITH
THIS
UNIT
. S
ERIOUS
PROPERTY
DAMAGE
,
PERSONAL
INJURY
,
REDUCED
UNIT
PERFORMANCE
AND
/
OR
HAZARDOUS
CONDITIONS
MAY
RESULT
FROM
THE
USE
OF
SUCH
NON
-
APPROVED
DEVICES
.
WARNING
T
O
PREVENT
THE
RISK
OF
PROPERTY
DAMAGE
,
PERSONAL
INJURY
,
OR
DEATH
,
DO
NOT
STORE
COMBUSTIBLE
MATERIALS
OR
USE
GASOLINE
OR
OTHER
FLAMMABLE
LIQUIDS
OR
VAPORS
IN
THE
VICINITY
OF
THIS
APPLIANCE
.
WARNING
SAFE REFRIGERANT HANDLING
While these items will not cover every conceivable situa-
tion, they should serve as a useful guide.
R
EFRIGERANTS
ARE
HEAVIER
THAN
AIR
. T
HEY
CAN
“
PUSH
OUT
”
THE
OXYGEN
IN
YOUR
LUNGS
OR
IN
ANY
ENCLOSED
SPACE
. T
O
AVOID
POSSIBLE
DIFFICULTY
IN
BREATHING
OR
DEATH
:
• N
EVER
PURGE
REFRIGERANT
INTO
AN
ENCLOSED
ROOM
OR
SPACE
. B
Y
LAW
,
ALL
REFRIGERANTS
MUST
BE
RECLAIMED
.
• I
F
AN
INDOOR
LEAK
IS
SUSPECTED
,
THOROUGHLY
VENTILATE
THE
AREA
BEFORE
BEGINNING
WORK
.
• L
IQUID
REFRIGERANT
CAN
BE
VERY
COLD
. T
O
AVOID
POSSIBLE
FROST
BITE
OR
BLINDNESS
,
AVOID
CONTACT
AND
WEAR
GLOVES
AND
GOGGLES
. I
F
LIQUID
REFRIGERANT
DOES
CONTACT
YOUR
SKIN
OR
EYES
,
SEEK
MEDICAL
HELP
IMMEDIATELY
.
• A
LWAYS
FOLLOW
EPA
REGULATIONS
. N
EVER
BURN
REFRIGERANT
,
AS
P
OISONOUS
GAS
WILL
BE
PRODUCED
.
WARNING
T
HE
U
NITED
S
TATES
E
NVIRONMENTAL
P
ROTECTION
A
GENCY
(”EPA”)
HAS
ISSUED
VARIOUS
REGULATIONS
REGARDING
THE
INTRODUCTION
AND
DISPOSAL
OF
REFRIGERANTS
INTRODUCED
INTO
THIS
UNIT
.
F
AILURE
TO
FOLLOW
THESE
REGULATIONS
MAY
HARM
THE
ENVIRONMENT
AND
CAN
LEAD
TO
THE
IMPOSITION
OF
SUBSTANTIAL
FINES
. T
HESE
REGULATIONS
MAY
VARY
BY
JURISDICTION
. S
HOULD
QUESTIONS
ARISE
,
CONTACT
YOUR
LOCAL
EPA
OFFICE
.
WARNING
T
O
AVOID
POSSIBLE
EXPLOSION
:
•N
EVER
APPLY
FLAME
OR
STEAM
TO
A
REFRIGERANT
CYLINDER
. I
F
YOU
MUST
HEAT
A
CYLINDER
FOR
FASTER
CHARGING
,
PARTIALLY
IMMERSE
IT
IN
WARM
WATER
.
•N
EVER
FILL
A
CYLINDER
MORE
THAN
80%
FULL
OF
LIQUID
REFRIGERANT
.
•N
EVER
ADD
ANYTHING
OTHER
THAN
R-410A
TO
A
RETURNABLE
R-410A
CYLINDER
. T
HE
SERVICE
EQUIPMENT
USED
MUST
BE
LISTED
OR
CERTIFIED
FOR
THE
TYPE
OF
REFRIGERANT
USE
.
•S
TORE
CYLINDERS
IN
A
COOL
,
DRY
PLACE
. N
EVER
USE
A
CYLINDER
AS
A
PLATFORM
OR
A
ROLLER
.
WARNING
REFRIGERANT PIPING ............................................. 18
DUCT STATIC PRESSURES AND/OR STATIC PRES-
SURE DROP ACROSS COILS ................................... 22
AIR HANDLER EXTERNAL STATIC .......................... 22
COIL STATIC PRESSURE DROP .............................. 22
INDOOR UNIT TROUBLESHOOTING ...................... 23
DIAGNOSTIC CODES ................................................ 25
SETTING THE MODE DISPLAY ................................ 28
INDOOR UNIT ERROR CODES ................................ 30
CTK04 ADDENDUM .................................................... 49
TROUBLESHOOTING ..................................................... 69
WIRING DIAGRAMS ........................................................ 81
ACCESSORIES................................................................ 83
CHECKING HEATER LIMIT CONTROL(S) (OPTION-
AL ELECTRIC HEATERS) .......................................... 84
ELECTRIC HEATER OPTIONAL ITEM ..................... 84
CHECKING HEATER FUSE LINK (OPTIONAL ELEC-
TRIC HEATERS) .......................................................... 85