U-Line H-3778 User manual

0513 IH -3778PAGE 1 OF 10
READ THIS SECTION BEFORE ATTEMPTING TO
OPERATE AIR CONDITIONER. UNIT MUST BE
UPRIGHT ONE HOUR PRIOR TO OPERATING.
The power supply cord contains a current device that
senses damage to the power cord. To test your power
supply cord do the following:
1. Plug in the Air Conditioner.
2. The power supply cord will have TWO buttons on the
plug head. Press the TEST button. You will notice a
click as the RESET button pops out.
3. Press the RESET button. Again you will notice a click
as the button engages. (See Figure 1)
4. The power supply cord is now supplying electricity to
the unit.
NOTE: Do not use this device to turn the unit
on or off. Always make sure the RESET button
is pushed in for correct operation. The power
supply cord must be replaced if it fails to reset
when either the TEST button is pushed, or it
cannot be reset. A new one can be obtained
from the product manufacturer. If power supply
cord is damaged, it CANNOT be repaired. It
MUST be replaced by one obtained from the
product manufacturer.
OPERATING INSTRUCTIONS
ACCESSORIES INCLUDED
H-3778
H-3779
PORTABLE AIR
CONDITIONER
1-800-295-5510
uline.com
π
Figure 1
Exhaust Hose x 1
NOTE: Check that all accessories are included in the package
and please refer to the installation instructions for their usage.
Unit/Exhaust Adaptor A x 1 Window/Exhaust Adaptor B x 1 Foam Seal x 3
Battery (For Remote Control) x 2Safety Lock x 1Remote Control x 1
Window Sliding Kit x 1 ½" Screw x 4 ½" Screw Hex Head
Cap Screw x 2
¾" Screw x 2

0513 IH -3778PAGE 2 OF 10
NORMAL SOUNDS
UNIT DESCRIPTION
Today’s high efficiency
compressors may have a
high-pitched chatter during
the cooling cycle.
Unit may vibrate and make noise
because of uneven floor.
At the front of the unit, you may
hear the sound of rushing air
being moved by the fan.
“Gurgling or hissing” noise may be
heard due to refrigerant passing
through evaporator during normal
operation.
Sound of Rushing Air
Gurgle/Hiss
High-pitched Chatter
Vibration
Control Panel
Remote Control
Room Air Discharge
Caster
Carrying Handle
(Both Sides)
Remote Control
Storage Door
Exhaust
Air Outlet
Air Intake
Dehumidifying
Drain Outlet
Bottom Tray Drain Outlet
Exhaust Hose
(Storage When
Not In Use)
Exhaust
Adaptor A

0513 IH -3778PAGE 3 OF 10
INSTALLATION INSTRUCTIONS
EXHAUSTING HOT AIR
In the COOLING Mode the appliance must be placed
close to a window or opening so that the warm exhaust
air can be ducted outside.
First position unit on a flat floor and make sure there's
a minimum of 12" clearance around the unit, and is it
within the vicinity of a single circuit outlet power source.
1. Take the hose out from back of the unit.
(See Figure 1)
2. Remove adaptor A from unit by sliding sideways.
(See Figure 2)
3. Extend either side of the hose (See Figure 3)
and screw the hose to adaptor A. (See Figure 4)
4. Extend the other side of the hose and screw it to
adaptor B. (See Figure 5)
5. Slide the assembly onto unit. (See Figure 6)
6. Affix the adaptor B into the window slider kit and seal.
(See Figures 7 & 8)
The hose can be extended from its original length of
15" up to 55", but it is the best to keep the length to
minimum required. Also make sure that the hose does
not have any sharp bends or sags. (See Figure 9)
Take the hose out
Slide out
Extend the side of hose
Slide onto
Window Slider Kit
Minimum:26.6"(67.5cm)
Maxmum:48.5"(123cm)
Vertical
window
Window Slider Kit
Minimum:26.6"(67.5cm)
Maxmum:48.5"(123cm)
Horizontal
window
Figure 5
Figure 7
Figure 8
Figure 2
Figure 1
Figure 3
Figure 4
Figure 9
Figure 6

0513 IH -3778PAGE 4 OF 10
INSTALLATION INSTRUCTIONS CONTINUED
INSTALLATION IN A DOUBLE-HUNG SASH
WINDOW
1. Cut the foam seals (adhesive type) to the proper
lengths and attach them to the window and stool.
(See Figure 10)
2. Open the window sash and place the window slider
kit on the window stool. (See Figure 11) Adjust the
length of the window slider kit according to the
width of window. Screw down the two screws on the
window slider kit. (See Figure 11) Cut the adjustable
window slider kit if the width of window is less than
26.6 inches. (See Figure 12)
3. Close the window sash securely against the window
slider kit. (See Figure 13)
4. Drive two ½" screws to secure the window slider kit to
the window sash. (See Figure 13)
5. Secure the window slider kit to the window stool.
(See Figure 13)
A: For wooden windows: Use ¾" screws for securing.
B: For Vinyl-Clad windows: Use ½" hex head cap
screws for securing.
6. To secure lower sash in place, attach right angle
sash lock with ½" (12.77mm) screw as shown.
(See Figure 14)
NOTE: It is difficult to lock the windows with the
sash lock for Vinyl-Clad windows, so you can
use lock by window itself.
7. Cut the foam seal to an appropriate length and seal
the open gap between the top window sash and
outer window sash, as shown. (See Figure 15)
Foam seal A
(adhesive type)
Window slider kit
Window stool
26.6"~48.5"
screws
Cut this side to fit your window
hex head cap screws
Window slider kit
Window stool
screws
screws or
Foam seal
Figure 12
F i g u re 11
Figure 10 Figure 13
Fig ure 14
Figure 15

0513 IH -3778PAGE 5 OF 10
INSTALLATION IN A SLIDING SASH
WINDOW
1. Cut the foam seals (adhesive type) to the proper
lengths and attach them to the window frame.
(See Figure 16)
2. Open the window sash and place the window slider
kit on the window stool. (See Figure 17) Attached
the window slider kit to the window stool. Adjust the
length of the window slider kit according to the
height of the window. Screw down the two screws
on the window slider kit. (See Figure 17) Cut the
adjustable window slider kit if the height of the
window is less than 26.6 inches. (See Figure 18)
3. Close the sliding sash securely against the window
slider kit. (See Figure 19)
4. Drive two ½" screws to secure the window slider kit to
the window sash. (See Figure 19)
5. Drive two ¾" screws to secure the window slider kit to
the window sash. (See Figure 19)
6. Cut the foam seal to an appropriate length and seal
the open gap between the sliding sash and outer
window sash. (See Figure 20)
7. To secure the sliding sash in place, attach right
angle sash lock with ½" (12.7mm) screw.
(See Figure 21)
INSTALLATION INSTRUCTIONS CONTINUED
Foam seal
(adhesive type)
screws
26.6"~48.5"
Window stool Window slider kit
Window stool Window slider kit
screws screws
F i g u re 17
Figure 18
Figure 16
screws
26.6"~48.5"
Window stool Window slider kit
Foam seal
Figure 19
Figure 20
Figure 21

0513 IH -3778PAGE 6 OF 10
AIR CONDITIONER FEATURES
CONTROL PANEL
REMOTE CONTROL
Swing
Button
Remote Signal
Receiver
Check Filter
Reset Button
Adjusts
Temperature
or Time
Displays
Temperature/Time
Sets Fan Speed
Sleep Mode
Sets Mode
Activates Timer
Turns Unit On or Off
Mode Indication
Mode Selector
Fan Speed Selection
Fan Speed Selector
Temperature/Timer
Control Buttons
On/Off Button
Timer Buttons
Reset + Lock
Pin Buttons
Swing Button
Sleep Button
Battery Size: AAA
WARNING: 1. Do not mix old and new batteries. Do not mix alkaline, standard (carbon-zinc), or
rechargeable (nickel-cadmium) batteries.
2. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
NOTE: The RESET button is depressed when you want to return to the initial factory settings. The LOCK
button is depressed to lock the keypad so the settings cannot be changed. The key symbol will appear in
the display of the remote control, depress the LOCK button again to release. Use a small pin to depress
these buttons.

0513 IH -3778PAGE 7 OF 10
OPERATING INSTRUCTIONS
COOLING MODE:
In this mode the exhaust adaptor hose MUST be used:
1. Press the MODE button until the "Cool" indicator lights .
2. Press the " " Temp buttons for desired settings.
3. Press the FAN button for desired fan speed.
HEATING MODE (ON SOME MODELS):
In this mode you do not need to use the exhaust
adaptor hose:
1. Press the MODE button until the "Heat" indicator lights.
2. Press the " " Temp buttons for desired heat
settings.
DRY MODE:
In this mode you do not need to use the exhaust
adaptor hose, BUT the water collected must be
discharged. See Drainage Section.
1. Press the MODE button until the "DRY" indicator lights.
2. The fan will run at low speed and the display will
show the room temperature.
3. Keep doors and windows closed for best effect.
AUTO MODE:
Always have the exhaust hose attached in this mode.
When you set the air conditioner in AUTO mode, it will
automatically select cooling, heating (inapplicable for
cooling-only models), or fan only operation depending
on what temperature you have selected and the room
temperature. The air conditioner will control room
temperature automatically round the temperature point
set by you. Under AUTO mode, you cannot select the
fan speed.
FAN MODE:
In this mode there is no need to use the exhaust hose
or drainage hose. However, if you require stale or
smokey air to be removed from the room, hook up the
duct accessories as described in the "EXHAUSTING HOT
AIR" section.
1. Press the MODE button until the "FAN" indicator lights.
2. Press the FAN button to choose the desired fan speed.
3. The fan will run at the select speed and the display
will show the room temperature.
TIMER OPERATION:
You can set both delay stop and delay start while unit
is in ON position or OFF position. When unit is in ON
position, first press TIMER button to go to delay stop
setting, then "timer off" light will illuminate. Tap or hold
the UP arrow ( ) or the DOWN arrow ( ) to change
delay stop timer at 0.5 hour increments up to 10 hours,
then at 1 hour increments up to 24 hours. Then press
the TIMER button to confirm the setting (the control will
confirm the setting automatically after 5 seconds) and
go to delay start setting. Use the same way as above
to set the delay start timing. If you don't need to set
delay start, press the TIMER button again to exit. After
5 seconds, the control will automatically change the
display back to previous temperature display. If you
want to check remaining time, press the TIMER button.
The delay start operation automatically selects mode,
temperature and fan speed the same as last operation
you set.
When unit is in OFF position, press TIMER button to first go
to delay start setting, then "timer on" light will illuminate;
set the delay start and delay stop timing the same way
as above.
To cancel the timer setting, simply tap ( ) or ( ) button
to change the timing to 0.0.
SLEEP OPERATION:
In this mode the selected temperature will increase
by 2°F 30 minutes after the mode is selected. The
temperature will then increase by another 2°F after an
additional 30 minutes. This new temperature will be
maintained for 7 hours before it returns to the originally
selected temperature. This ends the "Sleep" mode
and the unit will continue to operate as originally
programmed. The "Sleep" mode program can be
cancelled at any time during operation by again
pressing the "Sleep" button.
NOTE: This feature is unavailable under
FAN or DRY modes.
NOTE: The following instructions are for the Control Panel, the same instructions can be used for the
Remote Control.
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0513 IH -3778PAGE 8 OF 10
OPERATING INSTRUCTIONS CONTINUED
SWING OPERATION:
When you turn on the unit, the louver will swing and stop
at a certain angle. You can press the SWING button
to let the louver swing automatically. Press the SWING
button again when you want the louver stop at desired
angle.
CHECK FILTER FEATURE:
This feature is a reminder to clean the Air Filter (See
Care and Cleaning) for more efficient operation. The
LED (light) above the "Filter" button will illuminate after
250 hours of operation. To reset after cleaning the filter,
press the "Filter" button and the light will go off.
FAULT CODE:
If the display reads "EA", the room
temperature sensor has failed. Contact
Uline Customer Service.
If the display reads "ES", the evaporator
temperature sensor has failed. Contact
Uline Customer Service.
If the display reads "E4", the display
panel communication has failed.
Contact your Uline Customer Service.
If the display reads "P1", bottom tray is
full. Carefully move the unit to a drain
location, remove the bottom drain plug
and let the water drain away. Restart
the machine until the "P1" symbol
disappears. If error repeats, call for
service.
DRAINAGE:
During the dehumidifying mode, you will need a
garden hose (sold separately) to drain the condensate
from the unit. Remove the rubber stopper from the hose
connector. (See Figure 22)
The hose may then:
A. Discharge into a drain that is lower than the unit.
B. Be connected to a condensate pump (sold
separately).
REMOTE CONTROL STORAGE:
Door on the side of
the unit is for storing
the remote. To open,
press it (See Figure 23),
to close, simply push it
back into position.
Remove the
supplied rubber
stopper
Garden hose
Press here
Figure 22
Figure 23

0513 IH -3778PAGE 9 OF 10
OPERATING INSTRUCTIONS CONTINUED
ADDITIONAL THINGS YOU SHOULD KNOW:
Now that you have mastered the operating procedure,
here are more features in your control that you should
become familiar with.
• The "Cool" circuit has an automatic 3 minute
time delayed start if the unit is turned off and on
quickly. This prevents overheating of the compressor
and possible circuit breaker tripping. The fan will
continue to run during this time.
• The control will maintain the set temperature within
2°F, between 62°F and 86°F (17°C and 30°C).
• The control is capable of displaying temperature in
degrees Fahrenheit or degrees Celsius. To convert
from one to the other and back, press and hold the
"Temp"Up ( ) and Down ( ) buttons together for 3
seconds.
• There is a 2-second delay for the compressor
shutting down when selecting FAN ONLY/HEAT. This
is to cover the possibility of having to roll through to
select another mode.
• After a power outage, the unit will memorize the last
setting and return the unit to the same setting once
power is restored.
Clean your air conditioner occasionally to keep it looking new. Be sure
to unplug the unit before cleaning to prevent shock or fire hazards.
AIR FILTER CLEANING
• This unit has three filters: filter A, B and C. Grasp the upper panel
tab and take off the filter A behind the grill of the back panel
(See Figure 24). Remove the lower filter B and C by loosening the
screws. Take down the air inlet grille, then remove the air filter.
(See Figure 25 & 26)
• Wash the filter using liquid dishwashing detergent and warm
water. Rinse filter thoroughly. Gently shake excess water from the
filter. Be sure filter is thoroughly dry before replacing.
• Or, instead of washing, you may vacuum the filter clean.
CABINET CLEANING
• Be sure to unplug the air conditioner to prevent shock or fire
hazard. The cabinet and front may be dusted with an oil-free
cloth or washed with a cloth dampened in a solution of warm
water and mild liquid detergent. Rinse thoroughly and wipe dry.
• Never use harsh cleaners, wax or polish on the cabinet front.
• Be sure to wring excess water from the cloth before wiping
around the controls. Excess water in or around the controls may
cause damage to the air conditioner.
WINTER STORAGE
If you plan to store the appliance during the winter, cover it with plastic
or return it to its carton.
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CARE AND CLEANING
Filter A
Filter B
Remove two
screws and
take the air
intake grille
down
Slide out the filter B
behind the side panel
Filter C
Remove the filter C
out from the grille
Figure 24
Figure 25
Figure 26

0513 IH -3778PAGE 10 OF 10
TROUBLESHOOTING
OCCURRENCE SOLUTION
Air conditioner will not
operate.
Wall plug disconnected. Push plug firmly into wall outlet.
Plug Current Device Tripped. Press the RESET button.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker.
Control is OFF. Turn Control ON and set to desired setting.
P1 appears in the display window. Drain water as described in Drainage Section.
Shut off in Heat mode. When the air outlet exceeds 158° F (70° C), the automatic heat protection
engages. Remove any blockages and let appliance cool down.
Room Temperature lower than the set temperature (Cool Mode). Reset the temperature.
Room Temperature higher than the set temperature (Heat Mode). Reset the temperature.
Air from unit does not feel
cold enough.
Room temperature below 60°F (16°C). Cooling may not occur until room temperature rises above 60°F (16°C).
Reset to a lower temperature.
Compressor shut off by changing modes. Wait approximately 3 minutes and listen for compressor to
restart when set in a COOL mode.
Air conditioner cooling,
but room is too warm - ice
forming on cooling coil
behind decorative front.
Outdoor temperature below 60°F (16°C). Cooling may not occur until room temperature rises above 60°F (16°C).
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section (page 9). To defrost, set to FAN ONLY mode.
Temperature is set too low for nighttime cooling. To defrorst the coil, set to FAN ONLY mode. Thent set
temperature to a higher setting.
Exhaust duct not connected or blocked. See EXHAUSTING HOT AIR section (page 3).
Air conditioner cooling,
but room is too warm - NO
ice forming on cooling coil
behind decorative front.
Dirty air filter - air restricted. Clean air filter. Refer to Care and Cleaning section (page 9).
Temperature is set too high. Set temperature to a lower setting.
Air directional louvrers positioned improperly. Position louvrers for better air distribution.
Front of unit is blocked by drapes, blinds, furniture, etc. which restrict air distribution. Clear blockage in
front of unit.
Doors, windows, registers, etc., open and cold air escapes. Close doors, windows, registers, etc.
Unit recently turned on in hot room. Allow additional time to remove "stored heat" from walls, ceiling, floor
and furniture.
Air conditioner turns on
and off rapidly.
Dirty air filter - air restricted. Clean air filter.
Outside temperature extremely hot. Set FAN speed to a faster setting to bring air through cooling coils
more frequently.
Noise when unit is cooling. Air movement sound. This is normal. If too loud, set to lower FAN setting.
Vibration from uneven floor. Move or support appliance correctly on even surface.
Room too cold. Set temperature too low. Increase set temperature.
Room too hot. Set temperature too high. Lower setting.
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-800-295-551
0
uline.com