Carrier OM38/40-6 User manual

OWNER'S MANUAL
High-Wall Fan Coil Unit
CONTENTS
Page
GENERAL ....................................... 2,3
OPERATING MODES ............................ 2
REMOTE CONTROL ............................. 2
OPERATION ................................... 3-9
REMOTE CONTROL OPERATION ................ 3
INDOOR UNIT DISPLAY ......................... 5
EMERGENCY OPERATION ...................... 5
PRESSING THE ON/OFF BUTTON ................ 5
SELECTING AN OPERATING MODE ............... 6
SETTING THE TEMPERATURE SET POINT ....... 6
SELECTING THE DIRECTION
OF LOUVER POSITION ........................ 6
SELECTING THE FAN SPEED .................... 7
USING THE TURBO SETTING ................... 7
USING THE ECONOMICAL SETTING ............ 7
SETTING THE ON TIMER ........................ 7
SETTING THE OFF TIMER ....................... 8
SETTING THE DAILY TIMER .................... 8
SETTING THE SLEEP TIMER .................... 8
USING THE IONIZER FUNCTION ................ 9
REMOTE CONTROL ADDRESS SELECTION ..... 9
Page
RESETTING THE REMOTE CONTROL ........... 9
OPERATING CONDITIONS ...................... 9
TIME DELAY ................................... 9
MINIMUM OPERATION TIME ................... 9
HEATING FEATURES ............................ 9
DEFROST OPERATION .......................... 9
AUTO RECOVERY .............................. 9
INDOOR UNIT FROST PREVENTION IN
COOLING AND DEHUMIDIFICATION
MODE ........................................ 9
CLEANING, MAINTENANCE AND
TROUBLESHOOTING .......................... 9-11
PERIODIC MAINTENANCE ...................... 9
CLEANING THE COIL ........................... 9
AIR FILTERS ................................... 10
IONIZER ....................................... 10
INDOOR UNIT FRONT PANEL .................. 10
PREPARING FOR A LONG SHUTDOWN PERIOD.. 10
SYSTEM OPERATION CHECK LIST ............. 10
ENERGY SAVING RECOMMENDATIONS ........ 10
TROUBLESHOOTING ........................... 10
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 02-38H40Q01-OM Printed in U,S.A. Form OM38/40-6 Pg 1 2-06 Replaces: New

GENERAL
The high wall fan coil unit provides quiet, maximum
comfoll. In addition to cooling trod/or heating, the high wall
fan coil unit matched with an outdoor condensing unit will
filter and dehumidify the air in the room to provide maximum
comfort. See Fig. 1.
IMPORTANT: The high wall fan coil unit should be
installed by authorized personnel only. using approved
tubing and accessories. If technical assistance, service
or lepair is needed, contact the installer or call
1-800-227-7437.
The high wall fan coil unit can be set up and operated from
the remote control (provided). See Fig. 2. If the remote is
misplaced, the system can be operated from the "Auto" setting
on the unit.
Operating Modes -- The high wall fan coil unit has 5
operating modes:
• Fan only
• Auto (heat pump models only)
• Heating (heat pump models only)
• Cooling
• Dehumidification
FAN ONLY- In Fan Only mode, the system filters and
circulates room air without changing room air temperature.
AUTO -- In Auto mode, the system will automatically cool or
heat the room according to the user selected set point.
If the room temperature is 2° F lower than the set point, the
system will operate in Heating mode. If the room temperature
is 2° F higher than the set point, the system will operate in
Cooling mode.
HEATING -- In Heating mode, the system heats and filters
room tfi]_
COOLING --In Cooling mode, the system cools, dries and
filters room _dl:
DEHUMIDIFICATION- In Dehumidification mode, the
system &ies, filters and slightly cools room tfir temperature.
This mode does not take the place of a dehumidifiel:
NOTE: Two settings ale avtfilable for use with selected modes.
The Turbo setting provides maximum capacity. The Economi-
cal setting provides quiet, energy saving operation. Cooling
and Heating modes can be operated in either the Turbo or
the Economical setting. The Dehumidification mode can be
operated in the Turbo setting, and the Auto mode can be
operated in the Economical setting. See the Using the Turbo
Setting or Using the Economic_fl Setting sections for more
information.
Remote Control (Fig. 2-6)-- The remote control
transmits commands to set up and operate the system. The
controller has a window display panel that shows the current
system status. The controller can be secured to a surface when
used with the mounting rack provided. See Fig. 2.
@ ® ®® ®
/ /
L
/ /
LEGEND
A -- Outdoor Unit
B -- Indoor Unit
1 -- Automatic Swinging Louver
2 -- Air Filters
3 -- Remote Control Signal Receiver
4 -- Unit Operating Status Indicators
5 -- Interconnecting Tubing
6 -- Condensate Drain
//////////////////////////////,
Fig. 1 -- Indoor and Outdoor Unit Components

Fig.2-- High Wall Fan Coil Unit and Remote Control
(A((.o))
_//,b \\
%(g_o
Handle tile controller with care and avoid getting the con-
troller wet. Damage to the device may result.
IMPORTANT: The remote control can operate tile unit
fiom a distance of up to 16 ft as long as there are not any
obstructions.
The remote control can perform the following functions:
• Turn the system ON and OFF
• Select operating mode
• Adjust room air temperature set point and fan speed
• Set time periods for automatic system operation
BATTERY INSTALLATION -- Two AAA 1.5-v alkaline
batteries (included) are required for operation of the remote
control. See Fig. 3 for batte Ulocation.
After new batteries have been inserted, press the leset
button with a paper clip or the tip of a pen. Do not use old
batteries or batteries of different types, as this may cause the
® ®
Fig. 3 -- Location of Batteries on Remote Control
unit to malfunction. Batteries should only be changed after
turning the unit off. The average battery life during normal
use is approximately one year If the air conditioner does not
operate normally after replacing the batteries, refit the batteries
and press the reset button again after 5 seconds.
To install batteries:
1. Remove battery compartment cover by pushing the tab
up and removing it from the remote.
2. Insert batteries being sure to follow polarity markings
inside battery compartment.
3. Replace battery compartment covel:
NOTE: Replace batteries whenever "Ix_w battery" indicator
appears on remote control display panel. See Fig. 4.
DISPLAY SCREEN -- There me five operating mode indica-
tors that appear on the remote control display screen. See Fig. 4.
OPERATION
Remote Control Operation-- The remote control
has 3 buttons (see Fig. 5) used for operating and controlling the
system:
•/_ -- changes operating mode
• A V -- adjust temperature
• (!) -- turns the system on or off.
NOTE: When transmitting a command from the remote
control to the unit, be sure to point the controller toward the
right side of the unit. See Fig. 6. The unit will confirm receipt
of a command by sounding an audible beep.
IMPORTANT: If no changes zue made within 10 sec- [
onds, the remote control will return to its previous I
setting.

SETTINGTHETIMEON THEREMOTECONTROL
(CunentTimeAdjustingCandResetButtons)-- Plesscur-
renttimeadjustingbuttonCtoadjustthecurrenttime.Press
the resetbuttonwiththetipofapenorapaperclipifthere-
motecontrolisnotoperatingproperlyorafterleplacingthe
batteries.
1. Withtheremotecon- _ )
trol ON or OFK
pressC for at least
5seconds.
2. Thecurrenthourflash-
es.PresseitherA or
g to setthecurrent
horn:PressC again
to moveto setthe
minutes.
3. Oncethecurrenttime
isset,pressCtocon-
firmit.
FAN SPEED -- To select the Fan mode and change the Fan
Speed, follow the steps below:
1. Press the Mode button to select the Fan mode.
2. Press the Fan Speed button to select desired fan speed.
NOTE: If unit is operating in Dehumidification mode the fan
will only operate in low speed and cannot be changed.
TEMPERATURE SETTINGS- The temperature set point
can be easily changed by pointing the controller toward the unit
and pressing the increase/decrease temperature set point
buttons until the desired temperatme appears on screen.
AIRFLOW DIRECTION- The louveLs can be manually
operated by pressing the Louver button to change airflow
direction. Refer to Table 1 for louver positions.
2
4
I
I
15 16 14
1. Operating mode (from left to right)
•Fan only
• Heating (heat pump models only)
• Automatic (heat pump models only)
• Cooling
• Dehumidification
2. Signal transmission symbol
3. Temperature set point selected
4. Address selected
5. Temperature unit of measurement (°C or °F)
6. Unit configuration
7. Low Battery indicator
8. Louver position
9. Fan speed
10. Turbo setting
11. Economical setting
12. ON timer selected
13. Night timer active
14. DAILY timer active (Everyday)
15. ON timer and OFF timer or current time
16. OFF timer selected
17. Ionizer active
Fig. 4- Remote Control Display Icons

L
O
K
M
N
Fig. 5 -- Operating Mode Indicators on
O Display readout
A. Mode selection button
B. ON/OFF button
C. Increase temperature button
D. Decrease temperature button
E. Fan speed selection button
E Turbo setting button
G. Economical setting button
H. Louver control button (Flap)
I. ON timer button
J. DALLY timer button (Everyday)
K. Cancel timer button /Current time
button
L. OFF timer button
M. Sleep timer button (night)
N. Ionizer button
O. Reset button
Remote Control
_ __=_: _- ))) BEEP
9
Fig. 6 -- Proper Positioning of Remote Control
Table 1 -- Louver Positions
SYMBOL ON DESCRIPTION
REMOTE CONTROL
Louver position will be set automatically.
Louver will be set to the preset position
according to the operation mode.
The louver can be set to one of
/_. _ _ six different airflow directions.
/I
The louver will continuously swing
up and down. The "swing" setting will
...._1 provide optimal, even air distribution
in the room.
Indoor Unit Display (Fig. 7) -- The indoor unit dis-
play has three LED indicators at the lower right hand portion of
the unit. Tile Blue light is illuminated when the ionizer is
active. Tile Orange light is illuminated during timer mode. The
Green light is illuminated during operation.
Emergency Operation -- When the remote control is
lost or damaged or the batteries are exhausted, the EMER.
button can be used to run the unit.
Press the EMER. button once briefly when the system is off.
To stop emergency operation, push the EMER. button again
or operate the remote control.
The set conditions of emergency operation are as follows:
• Preset set point: 77 F
• Fan speed: AUTO
• Timer mode: Disabled
• Discharge air direction: Pre-set position based on opera-
tion in "Cool" or "Heat" mode.
(_ Pressing the On/Off Button -- When the
air conditioner is not in operation, the remote
control readout will display the time of day only.
Press the On/Off button to stm-t the unit.
The unit will start in the last operating mode.
Press button On/Off to stop the unit.
All indicator lights on the unit will go out, and file remote
control will display only the current time.
If the unit does not stop, turn the control on (by pressing the
On/Off button) and repeat the operation.
NOTE: If the On/Off button is pressed too soon after a stop,
the compressor will not start for 3 to 5 minutes due to the
inherent protection against frequent complessor cycling. The
unit will only emit an audible beep when file signals am
received correctly.

r
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-- EMER. button
Fig. 7 -- Unit Display and Switch Panel
(T) Blue indicator light
@ Orange indicator light
@ Green indicator light
@ Switch panel
MSelecting an Operating Mode-- Use the
/_ button to select the unit operating mode.
Repeatedly press the Operating Mode button to select avail-
able modes.
The chosen mode is shown as follows, while the unit will
acknowledge signal receipt with a beep.
Indicated symbol:
v_ Fan Only
-,O_- Heating
A Automatic
O Cooling
Dehumidification
Setting the Room Temperature Set Point --
Pressing the increase temperature set point A and decrease
g buttons will raise or lower the temperature.
The unit will confirm signal receipt with a beep, and the
value of the set temperature on the display will change
accordingly.
The temperature can be set between 63 F and 90 F at
1 degree intervals.
NOTE: In Cooling mode, if the temperature selected is higher
than the room temperature the unit will not start; the same
applies for the Heating mode, if the selected temperature is
lower than the room temperature.
The remote control can be set to display the temperature in
degrees Fahrenheit or degrees Celsius. To change the tempera-
ture setting, complete the following steps while the unit is off:
1. Press the decrease set point button and the louver button
simultaneously for 5 seconds.
2. The display will show the channel setting (CH).
3. Press the mode /_ button once to go to the Temperature
(tu) screen.
4. Use the increase or decrease set point arrows to change
the temperature display setting.
5. Press the louver button to transmit the temperature dis-
play setting to configure the remote.
_/_/_1 Selecting the Direction of Louver Posi-
tion- qn_eairflow direction can be adjusted to
optimize air distribution.
Press the louver button _ repeatedly to choose one of the
louver positions. See Table 1.
In the Cooling, Dehumidification and Fan Only mode, the
louver will swing in the cooling range. In the Heating mode,
the louver will swing in the heating range. See Fig. 8.
NOTE: Always use the remote control to adjust the louver
position, otherwise abnormal operation may occur If the
louver is manually adjusted out of its range, turn the unit off
and then on again.
Cooling
".9_Heating
Fig. 8 -- Cooling and Heating Louver Position

LEFT AND RIGHT CONTROL -- To adjust the direction of
the discharge air to the left or right, adjust the vellical guide
vane with the handle after opening the louvel: See Fig. 9.
NOTE:
• Do not set tile louver to position _ for long periods of
/
time, because this position minimizes air circulation
resulting in uneven room temperature.
• Do not adjust the louver manually during SWING opera-
tion because it may damage the air swing mechanism.
• For maximum cooling or heating capacity, please louver
to position _.
/
Selecting the Fan Speed -- Tile fan speed
can be selected by pressing tile fan speed button
÷
SYMBOL DESCRIPTION
(_:_) Low speed.
((_:_)) Medium speed.
(((v_))) Highspeed.
C4 ;) Automatic(fan will automaticallyswitch to the
appropriate speedfor optimum comfort)
Using the Turbo Setting -- For maximum
capacity while in Cooling, Dehumidification and Heat-
ing modes, press the Turbo Setting button t._. On the
display, the Turbo Setting icon _ will appem:
1. Turbo Cooling mode performs the
turbo cooling operation until room tem-
perature reaches 63 F or 20 minutes af-
ter pressing the Turbo Setting button.
While in Turbo Cooling mode, indoor
fan speed is high and compressor speed
is over-rating speed to obtain maximum
cooling capacity.
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2. Turbo Heating mode performs the
turbo heating operation until room
temperature reaches 90 F or 20 minutes
after pressing the turbo setting button.
While in Turbo Heating mode, the
indoor fan and compressor operates in
high speed in order to obtain maximum
heating capacity.
Turbo Dehumidification mode per-
forms the dehumidification operation
until room temperature is under 63 F or
3 hours after pressing the turbo setting
button. While in Turbo Dehumidifica-
tion mode, indoor fan speed operates in
low speed in order to remove humidity
more effectively.
During the turbo setting, room temperature and fan speed
cannot be changed using the remote controller
Press /_, _ or E to cancel turbo setting mode.
Fig. 9 -- Using the Vertical Guide Vane
EUsing the Economical Setting -- For quiet,
energy saving operation in Cooling, Heating find Auto
modes, press the Economical Setting button E On the
display, the Economicfd Setting icon E will appem:
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Economical Cooling mode:
The indoor tim and compressor operate
fit a minimum speed for maximum en-
ergy savings.
2. Economical Heating mode:
The indoor fan and compressor operate
fita minimum speed for maximum en-
ergy savings.
3. Economicffl Auto mode:
Unit operates in Economical Cooling
mode or Economical Heating mode
depending on the room temperature
find set point.
During the Economical setting, the room temperature and
louver position can be set by using the remote control. Fan
speed cannot be changed while in the Economical setting.
Press /_, _ or E to cancel the economical setting.
-------]Setting the ON Timer
• --i i--i oc
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1. ON TIMER button []
Press the [] , even if the unit is off.
The relevant icon and time figure will
start to flash.
If 10 seconds have elapsed and no
button is pressed, the remote control
returns to the previous setting without
making any changes.
2. Setting the ON time with A V.
When the unit is ON, the only possible selection is the
start-up time. The Operating mode and set point remain
file same as the currant operation.
To select the stmt-up time when the unit is off. use A
V.
First select the hours and confirm by pressing []. Then
select the minutes using either A or g.
To finish setting file time, press [] again.
3. Choose the unit Operating mode.
To select the operating mode, use the /_ button. Once
the operating mode has been selected, press [].
The icon of the selected mode will stop flashing.
4. Select the desired set point temperature.
To select the desired temperature, use either A or g.
Push [] to confirm the selection. The set point numbers
will stop flashing.

Fanspeed:
Choosefilefanspeed,using'@. When the selection has
been completed, press button [] for confirmation. The
fan speed icon will stop flashing.
Ix)uver positioning:
Use _, to select desired louver position. Press [] for
confirmation. Now all icons are fixed on display. To can-
cel selections made up to this point, push C; to cancel _dl
of the selected options once the timer has been set,
push [] and then C. The ON Timer settings ale now
complete.
Setting the Off Timer -- Set the OffTimer toselect a time for the system to turn off.
I.
• --inoc
E)_(
((c÷>)) _,_
_ :l.nn 2.
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, []
Press the Off Timer button.
The Off timer icon and numbers for a
time selection flash.
NOTE: This function can be set even if
the remote control is OFF.
Setting the Off time (buttons A and
V).
To set the Off time, press either button
A orV.
To move from hour to minute, press
.
Press [] again to confirm Off time
setting.
Setting the DALLY Timer -- Push file but-
ton _ when the ON or OFF timer is active. The
icon will appem on display.
In this way the ON and OFF timer settings will be repeated
every &ty.
To deactivate the daily function, press [] again.
EXAMPLE 1: Combining the ON, OFF and DAILY timer
features.
To start the unit at 5:30 RM. and stop at 10:30 RM. for one
day only, complete the following steps:
1. Set the ON timer for 5:30 RM.
2. Set the OFF timer for 10:30 RM.
3. Select desired operating mode ( M ).
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EXAMPLE 2: To stop operation at 10:30 RM. and start again
at 7:30 A.M. with the same operating mode, complete the fol-
lowing steps:
1. Set the OFF timer for 10:30 RM. while the system is
operating.
2. Set the ON timer for 7:30 A.M.
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For everyday operation to stml at 5:30 RM. and stop at
10:30 RM. complete the following steps:
1. Set the ON timer for 5:30 RM.
2. Set the OFF timer for 10:30 RM.
3. Press the DAILY timer button [].
DU (U.__U
II
CANCELLING THE ON, OFF AND DAILY TIMER
SETTINGS -- To cancel the ON or OFF timer setting, press
the following buttons in order:
1. Button [] or [] ;
--I)--I °C
Eu
5:30
2. Button C.
To deactivate the Daily timer func-
tion, press [].
NOTE: Every&_y operation will remain
active until one of the two timers (ON
or OFF) is active.
1_ Setting the Sleep Timer-- Press this button
to set the SLEEP timer with the system on. The icon
will appear on the display.
This procedme pennits setting the remaining unit operating
time until the Sleep mode is entered.
1. "1 :hr" will be displayed together with the
_z
--II I°C
l_--n
/l I
l:hr
[]
icon.
2. P]ess A. The display will show the
following settings in sequence: 1:hr, 2:hr,
3:hr, 4:hr, 5:hr, 6:hr, 7:hi, 8:hr and 9:he
3:hr ri]
3. Once the remaining operating hours have been selected
with either button ,,A or --V, press the [] button to
confirm.
4. When the SLEEP timer is set, the unit will control the set
temperature to avoid overcooling or oveflleating during
operation. The set temperature will change as in Fig. 10.

oF
SET
TEMP.
+I°F
, I i ' I _i
i 30 70 110 150 TIME (MIN.)
SETTIME
(Cooling only or Dehumidification mode)
° F
SET
TEMP.
I
i' I i ID
30 90 150 TIME (MIN.)
SETTIME
(Heating mode)
Fig. 10 -- Set Temperature Levels
_. Using the Ionizer Function -- The ionizer
helps to eliminate odors in the conditioned space.
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1. Press _- to activate the Ionizer
function.
2. Press _b again to turn off Ionizer
function.
Remote Control Address Selection -- If two in-
door units are in the same room, one remote control can be
linked to one indoor unit, and the other remote control to the
other indoor unit, or both indoor units can be controlled with a
single remote control.
For more information, refer to the installation instructions.
Resetting the Remote Control -- If the remotecon-
trol is not functioning properly it can be reset by pressing the
reset button with a paper clip or tip of a pen.
Operating Conditions- Temperatureranges suitable
for unit operation _u'eas follows.
MODE INDOOR OUTDOOR
(°F) (°F)
Cool 59-90 59-110
Heat Max. 81 14- 75
Dehumidification 59-90 59-110
If the unit operates above 59 to 90 F maximum temperature
conditions for a long period of time, system diagnostics may
modify the system operation to prevent &mmge to the system.
Time Delay -- If unit operation is started aller the power
is turned off. there will be a 3-minute time delay until the
compressor turns on.
When heating operation starts, hot air delivery may be
delayed due to a warm-up period.
Minimum Operation Time -- In norm;d operation,
there is a minimum operation time of 5 to 7 minutes between
the compressor turning on and turning back off.
Heating Features --ff the unit starts in Heating mode,
there may be a preheating period before the unit is ready to
deliver warm all:
Defrost Operation -- In heating mode, if the outdoor
coil is fi_sted, the indoor fan and outdoor fan will turn off
while system removes the frost on the outdoor coil.
The system will automatically revert to normal operation
when frost is removed from the outdoor unit.
Auto Recovery -- If the power fails while the unit is
operating, the unit memorizes the operating condition, and it
will start operation automatically when the power is restored.
Indoor Unit Frost Prevention in Cooling and
Dehumidification Mode--If the unit operates at a
low ambient temperature, frost may appear on the indoor coil.
If the indoor coil temperature is near 32 E the compressor's
speed is reduced or stopped to protect the unit from frost.
CLEANING, MAINTENANCE
AND TROUBLESHOOTING
To avoid the possibility of electric shock, always turn off
power to the system before performing any cleaning or
maintenance to the system. Turn off the outdoor disconnect
switch located near outdoor unit. Be sure to disconnect
indoor unit if on a separate switch.
Operating the system with dirty air filters may damage the
indoor unit and could cause reduced cooling performance.
intermittent system operation, fi_st build-up on indoor coil
or blown fuses.
Periodic Maintenance- Periodic maintenance is
recommended to ensure proper operation of the unit. Recom-
mended maintenance intervals may vary depending on the
installation environment, e.g., dusty zones, etc. Refer to
Table 2.
The coil fins are very sharp. Use caution when cleaning
the coil fins to prevent unit dmnage and to avoid personal
injury.
Cleaning the Coil -- Clean the coil at the beginning of
each cooling season, or when necessary. Use a vacuum cleaner
or a long-bristle brush to avoid dmnage to the coil fins.

Air Filters- Remove and clean the air filters once a
month.
NOTE: If air filters show signs of excessive wear or are torn,
they must be replaced. Contact your local de;der for replace-
ment filters.
1. Open fiont panel on unit.
2. Pull filters down to remove.
3. Vacuum filters.
4. Clean with w_um water
5. Shake filter to remove excess water and dry thoroughly.
6. Replace filter by sliding filter behind fiont grille until fil-
ter snaps in place.
When cleaning the front panel, do not use water hotter than
105 F and do not pour water onto file fan coil.
Do not use abrasive or petroleum based cleaners as they
may dmnage the front panel.
Ionizer -- Clean the ionizer with a brush every four months.
Disconnect the unit from the main power supply prior to
cleaning or performing maintenance on the ionizel: Serious
pel,sonal injury could result.
1. Unscrew and lift the ionizer covel:
2. Brush the needles on the base of the ionizel:
3. Close the cover and tighten the sclew.
Indoor Unit Front Panel -- To clean the front panel on
the indoor unit, wipe the outside with a soft, chy cloth. If neces-
sary, a mild liquid detergent can be applied and wiped off with
a dry cloth.
Preparing for a Long Shutdown Period --
Clean the filters and reposition them in the unit. Operate the
unit in Fan only mode for 12 hours to dly all internal parts.
Turn main power supply off and remove batteries from the
remote control.
System Operation Check List-- The items out-
lined in the following list will help to assure proper system
operation:
• Be sure unit is connected directly to electrical supply.
• Replace both remote control batteries at the same time
when the Low Battery indicator appears.
• Point the remote control toward the unit display panel
when transmitting a command.
• Keep doors and windows closed while unit is operating.
• Close air vents in unoccupied rooms to save electricity.
• Contact an authorized service representative if a problem
arises that cannot be easily resolved.
• Do not perform cleaning or maintenance activities while
unit is on.
• Keep display panel on unit away from dilect sunlight and
heat as this may interfere with remote control transmissions.
• Do not block air intakes and outlets on the indoor or out-
door units.
Energy Saving Recommendations -- _e follow-
ing recommenckttions will add greater efficiency to the duct-
free system:
• Select a comfortable thermostat setting and leave it at
chosen setting. Avoid continually raising and lowering
the setting.
• Keep unit filter clean. Frequent cleaning may be neces-
sary depending on indoor air quality.
• Use drapes, curtains or shades to keep direct sunlight
from heating room on very hot days.
• Do not obstruct front grille air intake on front panel.
• Turn on air conditioning before indoor air becomes too
uncomfortable.
Troubleshooting -- Refer to Tables 3 and 4 before con-
tacting your loc;d dealel:
Table 2 -- Periodic Maintenance
INDOOR UNIT EVERY MONTH EVERY4 MONTHS EVERY YEAR
Clean Air Filter* •
Clean Drain Pipe •
Change Remote Control Batteries •
Clean Ionizer •
OUTDOOR UNIT EVERY MONTH EVERY4 MONTHS EVERY YEAR
Clean Outdoor Coil from Outside •
Clean Outdoor Coil from Inside1" •
Blow Air Over Electric Parts1" •
Check Electric Connection Tightening1. •
Clean Fan Wheel1" •
Check Fan Tightening1. •
Clean Drain Pans']" •
*Increase frequency in dusty zones.
1-Maintenance to be carried out by qualified service personnel. Refer to the Installation Manual.
10

Table 3 -- Troubleshooting
PROBLEM POSSIBLE CAUSE SOLUTION
• The circuit breaker has tripped or a fuse has Reset the circuit breaker or replace the fuse with the
blown, specified replacement fuse.
• Power failure. Restart operation when the power is restored.
Unit/System Does Not Work • Green or Orange LED is flashing on and off, Call your service representative.
which could indicate an indoor or outdoor unit
fault.
• Voltage is too low. Call your service representative.
• The filter is blocked with dust. Clean the air filter.
• Temperature is not set properly. Check the temperature and reset if necessary.
• A window or door is open. Close the window or door.
Cooling is Not Working Properly • The outdoor unit is obstructed. Remove the obstruction.
• The fan speed is too low. Change the fan speed selection.
• The operation mode is in Fan or Auto instead of Change the operating mode to Cool or reset the unit.
Cool.
• The filter is blocked with dust. • Clean the air filter.
Heating is Not Working Properly • Temperature is set too low. • Check the temperature and reset if necessary.
• A window or door is open. • Close the window or door.
• The outdoor unit is obstructed. • Remove the obstruction.
• The Off timer is not operating correctly. • Restart the operating mode.
• Green or Orange LED is flashing on and off, • Call your service representative.
Unit Stops During Operation which could indicate an indoor or outdoor unit
fault.
LEGEND
LED -- Light Emitting Diode
Table 4 -- Unit Protection Devices
TYPE OF PROTECTION EFFECT OF PROTECTION OPERATING MODE
Indoor Coil High Temperature Protection Compressor speed slow down or off Heating and Auto mode at high
outdoor temperatures
Indoor Coil Freeze Up Protection Compressor speed slow down or off Cooling, Dehumidification and Auto mode
at low outdoor temperatures
Discharge Gas High Temperature Protection Compressor speed slow down or off Cooling, Heating, Dehumidification and
Auto mode outdoor temperatures
Frequent Compressor Cycling Compressor time delay All
During heating operation the unit may defrost to remove
ice that might collect on the outdoor unit. During defrost,
the indoor fan will automatically stop, the louver will be
fixed at a horizont_d position and can not be changed until
the defrost cycle is completed. Forcing tile louver to
change its position during defiost could result in equipment
&image.
Fill out the following to save time on any future service calls.
Dealer's Name
Address
Telephone
Indoor Model #
Indoor Serial #
Purchase Date
Outdoor Model #
Outdoor Serial #
11

Copyright 2006 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 02-38H40QO1-OM Printed in U.S.A. Form 0M38/40-6 Pg 12 2-06 Replaces: New