Jet-Air JASA18HP230V1AC User manual

CEILI G CASSETTE
OW ER’S MA UAL
Models:
Indoor Unit Outdoor Unit
JASA18 P230V1AC
JASA18 P230V1AO
JASA24 P230V1AC
JASA24 P230V1AO
JASA30 P230V1AC
JASA30 P230V1AO
JASA36 P230V1AC
JASA36 P230V1AO
JASA42 P230V1AC
JASA42 P230V1AO
JASA48 P230V1AC
JASA48 P230V1AO
JET-AIR

Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Wireless Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-16
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-18
Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-20
Energy Saving Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Thank you for choosing a
Ceiling Cassette
Air Conditioning & Heating System!
You can feel confident in your selection because the same pride in craftsmanship
and engineering knowledge that goes into millions of other Gree installed
products worldwide has gone into your unit.
Please read this owner’s manual carefully before operation and retain it for
future reference.
Jet-Air

Superior Design for Superior Performance
dThe iscreet Ceiling Cassette provides low-noise performance through
design and innovation. The Ceiling Cassette is a one-stop solution for heating and air
conditioning large and small rooms. This flexible climate solution conveniently disappears
above the surface of any room’s drop ceiling. Features include a highly effective inverter
driven variable speed compressor, 4-way air discharge, multi speed fan, swing louver
and a cleanable air filter.
C utting edge fan technology is quiet and powerful. It efficiently circulates the
conditioned air throughout the space while safely removing water via the internal
condensate drain pump.
Flexibility and innovation make the Ceiling Cassette the best choice for creating ideal
climate conditions.
I TRODUCTIO
2

Indoor unit
Outdoor unit
3
OME CLATURE
Example: UMAT18HP230V1AC
Example:
JASA18HP230V1AO
JASA
Jet Air Conditioning South Africa
JASA

• Disconnect electrical power to the indoor and outdoor units before performing any
maintenance or cleaning.
• Do not attempt to repair the Gree system yourself. Incorrect repairs may cause electric
shock or fire. Contact a qualified service technician for all service requirements.
• Keep combustible materials away from the unit.
• Do not put hands or any objects into the air inlets or outlets. This may cause personal
injury or damage the unit.
• When cleaning, be careful not to splash water on the unit. Doing this may cause
electric shock or damage to unit.
• In the event of a failure (burning smell, etc.), immediately disconnect all electrical power
to indoor and outdoor units.
SAFETY PRECAUTIO S
Please read the following before operation.
Recognize safety information. This is the safety-alert symbol. When you see this symbol on
the unit and in instructions or manuals, be alert to the potential for personal injury. Understand
these signal words: DA GER, WAR I G, and CAUTIO . These words are used with the
safety-alert symbol.
DA GER identifies the most serious hazards which will result in severe personal injury or death.
WAR I G signifies hazards which could result in personal injury or death.
CAUTIO is used to identify unsafe practices which may result in minor personal injury or
product and property damage.
OTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
OTE: Your actual air conditioning & heating system and related devices may differ from
the images shown in this manual.
This appliance is not intended for use by children without responsible adult supervision.
Proper care should be taken to ensure safety.
eat pumps, air conditioners & heating equipment should be installed, started up, and
serviced only by qualified installers and service technicians. Air conditioning, heat pumps
and refrigeration systems are hazardous due to high voltage electrical components, high
refrigerant pressures, and moving parts.
WARNING
WARNING
WARNING
CAUTION
4

SYSTEM PARTS
Indoor unit
Part ame
1. Indoor Power Supply
2. Drain Pipe
3. Communication Cable
4. Decorative Discharge Air
Grille (sold separately)
5. Refrigeration Pipes
6. Wired Tether Controller
(sold separately)
7. Remote Controller
8. Service Cover
9. Communication Cable
10. Front Panel
11. Outdoor Power Supply
12. Liquid Pipe
13. Gas Pipe
14. Drain ose
Outdoor Unit
Air outlet
Air inlet
1
2
5
4
3
67
Air outlet
Air inlet
14 12 1110
The refrigerant pipe, drain pipe and electrical wiring for this unit should
be installed by a qualified VAC professional only.
CAUTION
98
13
5

SYSTEM FU CTIO S
WHISPER QUIET
Not only
are the
systems energy efficient but they are quiet too. Ceiling Cassette operates
with sound levels starting as low as 37 dB(A).
MULTI FA SPEEDS
Whether operating in either Cooling or eating mode, the indoor fan can be set to your choice
of three different speeds (Low, Medium or igh) to achieve maximum comfort.
BUILT I CO DE SATE LIFT PUMP
The
unit features a built-in drain pump that lifts condensate up to
90 cm
above the drain
pan to a gravity condensate drain system. In most cases, the internal condensate lift mechanism
will avoid the need for an external condensate pump.
CO DE SATE SE TRY
The unit’s fail-safe mechanism recognizes when there is a high level in the condensate pan and
shuts off the system to prevent overflow.
I TELLIGE T PRE-HEATI G
U-Match Systems guards against the annoying cool air blown into the room in heating mode.
The system constantly monitors the discharge air temperature. It will delay the indoor fan until
the indoor coil has warmed up to prevent blowing uncomfortable cool air into the room.
CO TROLLERS
The Ceiling Cassette unit comes with a factory supplied Wireless Remote Controller. An optional
Wired Tether Controller is sold separately.
OTE: The controllers are mutually exclusive. They cannot be used at the same time.
WIRELESS REMOTE
The multi-functional infrared hand held wireless controller is sleek, ergonomically
designed, easy to use and has a large backlit LCD display.
TETHER CO TROLLER
The wired Tether Controller mounts to the wall up to 8 m from the unit.
It provides complete control over your unit’s operation mode, desired temperature,
fan speed, airflow direction and more. (Sold Separately)
6

SYSTEM FU CTIO S
I TELLIGE T DEFROST
The Intelligent Defrost function increases room comfort and saves energy by eliminating
unnecessary defrost cycles. In heating mode, the unit will monitor the outdoor coil for frost
buildup. Once frost buildup has been detected, the system will switch into a defrost mode to
remove the frost.
I FEEL MODE
The unit will sense room temperature at the remote controller instead of at the indoor unit.
It then adjusts airflow and temperature accordingly for the ultimate in personal comfort
control and energy savings. This function is only available with the wired Tether Controller.
(Sold Separately)
SWI G LOUVER
The adjustable swing louvers can be controlled from the wireless controller. Vertical swing
louvers allows five different air discharge directions including Continuous Sweep. Maximize
comfort by adjusting the direction of airflow in the room by moving the louvers up or down.
FRESH AIR I TAKE
The Ceiling Cassette has a ventilation air knockout that allows a 100mm flex duct connection and
a field-supplied duct booster fan. The maximum fresh air allowed is 20% of the unit's high-speed
fan airflow rating.
POWER FAILURE MODE
Power interruptions are no problem for the U-Match system. User selections and system parameters
are stored in non-volatile memory. These parameters are retained during a power failure. When
power is returned, the Ceiling Cassette system will automatically return to the last operating mode.
TURBO MODE
Use Turbo Mode for situations where you wish to achieve the desired room temperature in the
shortest possible time. This mode runs the unit at ultra high speeds for quickest results.
CLOCK
The wireless remote controller has a built-in clock feature. The remote will display the time of
day in a 24-hour format.
TIMER MODE
The unit can be programmed to turn ON or OFF after a specific amount of time. The time period
is adjustable between one half and 24 hours.
7

SYSTEM FU CTIO S
MODE BUTTO
The unit can be set to five different operating modes: EAT, COOL, DRY, FAN ONLY and AUTO.
OTE: AUTO
MODE has
fixed setpoints of 20°C heating and 25°C cooling, which are
not adjustable. The system will automatically select heating or cooling to maintain room
temperature within this band.
SLEEP MODE
The unit will automatically adjust room temperature during your sleep time. This slight change
in temperature will not affect your comfort level due to the natural effects that sleeping has on
the body, but it will save on energy consumption and will lower electric bills.
X-FA MODE
When operating in humid areas, the X-fan or Dry Coil function allows the indoor fan to run for
a pre-determined amount of time after the unit is turned off (cooling or dry modes) to ensure
that additional moisture is removed from coil.
FAHRE HEIT °F / CELSIUS °C
The remote controller can be set to display in either °F or °C.
SELF-DIAG OSIS
With an on-board computer using real-time diagnostics, the system helps to
prolong its own life. The automatic diagnosis feature continuously scans for unacceptable
operating conditions or malfunctions. If such conditions occur, the system takes corrective action
or stops. Error codes are shown on the unit display to facilitate easy troubleshooting and repair.
PRIVACY LOCK MODE
The wireless remote controller has a Privacy Lock. The Privacy Lock averts unauthorized access
or tampering with system settings.
AGE CY LISTI GS
All systems are listed with A RI (Air conditioning, eating, and Refrigeration Institute) and are
ETL certified per UL Standards.
8

Remote Controller
I TRODUCTIO FOR ICO S O DISPLAY SCREE
OPERATIO OF WIRELESS REMOTE CO TROLLER
Part ame
1 Signal Transmitter
2 ON/OFF Button
3 Mode Button
4 – Button
5 + Button
6 Fan Button
7 Swing Button
8 Clock Button
9 Timer ON Button
10 X-Fan Button
11 Temp Button
12 Timer OFF Button
13 Turbo Button
14 Sleep Button
15 Light Button
1
2
4
6
8
10
13
3
5
7
9
11
14
12
15
Auto Mode
Cool Mode
Dry Mode
Fan Mode
eat Mode
Clock
Sleep Mode
Set Fan Speed
Operation Mode
X-Fan Mode
Set Temperature
Set Time
Timer On
Privacy Lock
Up & Down Swing
Light
Set Temp. Indoor
Ambient Temp.
Outdoor
Ambient Temp.
Temp. Display Type
Turbo Mode
9

The wireless remote controller is the interface between the user and the cassette
system. Commands are entered by the user to control the system. Any command that has
been entered with the remote controller will remain in memory until it is changed by the
user or the batteries are replaced.
When entering commands, point the remote controller in the direction of the unit. The unit
will emit an audible beep when the signals are received correctly.
O /OFF BUTTO
When you press the O /OFF button,“OPER” icon will be displayed
and the unit will start in the last operating mode and room setpoint.
When you press the O /OFF button again, the “OPER” icon will
disappear and the unit will shut down. The remote controller will
display the time and last room setpoint.
OTE: If the O /OFF button is pressed too soon after a
stop, the compressor will not start for 3 minutes due to the
inherent protection against frequent compressor cycling.
OPERATIO OF WIRELESS REMOTE CO TROLLER
REMOTE CO TROLLER OPERATIO S
The wireless remote controller is sleek, versatile and allows you to change room temperatures
and functions on your Ceiling Cassette system from the palm of your hand. The large
LCD display and buttons make it easy-to-understand and easy-to-use.
The remote controller is set from factory to display temperatures in°F. If °C is desired, turn the
remote OFF and then press “MODE“ and “––” buttons on the remote simultaneously.
ON Mode Display
SWI G LOUVERS
Press the Swing Louver button to select five different vertical
(up & down) air discharge directions including Continuous Sweep.
The Swing Louver icon will be displayed. Press this button
to set swing angle, which changes in direction as below:
Indicates louver swings back and forth in the five directions, as shown.
OFF
10234
8765
Swing Louver Display
10

OPERATIO OF WIRELESS REMOTE CO TROLLER
MODE BUTTO
Use the “MODE” button to select one of the available modes.
The selected mode will be displayed on the remote controller
and the appropriate icon will be displayed.
AUTO – Unit will automatically select heating or cooling to
maintain
room temperature between 20°C and 25°C.
The remote controller will display the Auto Mode icon with
no setpoint. The front panel display will show "25."
COOL –To cool to selected setpoint and remove moisture.
System varies compressor speed to maintain desired temperature.
HEAT – To heat to selected room setpoint. System varies compressor speed to maintain
desired room temperature.
FA O LY – To circulate air without heating or cooling. Use Fan Speed button to select
speed from low to high.
DRY – Select DRY MODE to increase moisture removal
during warm humid conditions. In Dry mode the indoor fan
will run at low speed during the cooling cycle. When setpoint
is reached, the indoor fan will turn off with the compressor.
: AUTO
: COOL
: DRY
: FA O LY
: HEAT
Icons Displayed
FA BUTTO
By pressing this button, AUTO, LOW ( ), MEDIUM ( ), or
IG ( ), speeds can be circularly selected. AUTO is the
default fan speed after Power ON.
OTE: In DRY mode, fan speed is not adjustable, it will remain at LOW.
Fan Button
LIGHT BUTTO
Press the LIG T button to turn On or Off the display on the ceiling
cassette. When the indoor unit first powers on, the ceiling cassette
display will default to ON. The LIG T icon will display when the
front panel display is ON.
Light Display
AUTO
11

PRIVACY LOCK MODE
The Privacy Lock prevents unauthorized access to the unit controls
and prevents tampering with system settings. The remote controller
can be locked by pushing the "+" and "-" buttons simultaneously
for 2 seconds. The Privacy Lock icon will be displayed on the remote
controller. Repeat the process to unlock the remote controller.
U
Privacy Lock Display
When the “TEMP” button is pushed once, the temperature
indicator is displayed. This indicates that the setpoint
temperature is displayed.
When the “TEMP” button is pushed a second time, the display will
show an icon with a thermometer inside a house. This indicates
that the room temperature is displayed.
When the "TEMP” button is pushed a third time, the display will
show an icon with a thermometer outside a house. This
indicates that the outdoor temperature is displayed. (Not available
on some models).
The room temperature and outdoor temperature will be displayed
for only 5 seconds before reverting back to displaying room setpoint.
OPERATIO OF WIRELESS REMOTE CO TROLLER
TIMER O MODE
The Ceiling Cassette unit can be programmed to automatically turn
ON after a selected time period. With the unit in OFF mode, press
TIMER button to activate the TIMER mode, and the ON/OFF icon
will begin blinking. Press + or - button to select a time setting from
0.5 to 24 hours. Press once for slow adjustment and hold down for
fast adjustment. Press TIMER button to confirm settings, and icon
will stop blinking. The unit will turn ON after the selected time period.
TIMER OFF MODE
The Ceiling Cassette unit can be programmed to automatically turn
OFF after a selected time period. With the unit in ON mode, press
TIMER button to activate the TIMER mode, and the ON/OFF icon will
begin blinking. Press + or - button to select a time setting from 0.5
to 24 hours. Press once for slow adjustment and hold down for fast
adjustment. Press TIMER button to confirm settings, and icon will
stop blinking. The unit will turn OFF after the selected time period.
Timer ON
Timer OFF
TEMP BUTTO
Temp Button
12

OPERATIO OF WIRELESS REMOTE CO TROLLER
SLEEP MODE
The unit will automatically adjust room temperature during
your sleep time. This slight change in temperature will not affect
your comfort level due to the natural effects that sleeping has
on the body, but it will save on energy consumption and will
lower your electric bill. Press the SLEEP button to select Sleep
Mode. The SLEEP icon will appear.
In Cool or Dry modes:
If setpoint is between 16°C to 23°C, temperature will slowly
increase 1°C
per hour
for 3 hours, then maintain this setpoint
for 4 hours, then reduce setpoint by 1°C and hold at this
setpoint until Sleep Mode is cancelled.
If setpoint
is between
23°C
to
27°C ,
temperature will slowly increase
1°C
per hour for 2 hours
,
then maintain
this setpoint for 5 hours, then reduce setpoint by
1°C
and hold at this setpoint
until Sleep Mode is cancelled.
If setpoint
is between
28°C
to
29°C ,
temperature will slowly increase
1°C
per hour for 1 hour,
then maintain
this setpoint for 6 hours, then reduce setpoint by
1°C
and hold at this setpoint
until Sleep Mode is cancelled.
If setpoint
is 86℉, unit will run at this setpoint for 7 hours, then reduce setpoint by
1°C
and
hold at this setpoint until Sleep Mode is cancelled.
In Heat mode:
If setpoint
is between
28 °C to
30°C, the unit will slowly reduce setpoint by
1°C
per hour for
3 hours, and then maintain this setpoint until Sleep Mode is cancelled.
If setpoint
is between 20
°C
to 27
°C ,
the unit will slowly reduce setpoint by
1°C
per hour for
2 hours, and then maintain this setpoint until Sleep Mode is cancelled.
If setpoint
is between
17°C
to 20
°C ,
the unit will reduce setpoint by
1°C ,
and then maintain
this setpoint until Sleep Mode is cancelled.
If setpoint
is
16°C ,
the unit will run at this setpoint until Sleep Mode is cancelled.
X-FA MODE
When operating in humid areas, the unit has a DRY COIL
function called X-Fan that will allow the indoor fan to run for a
pre-determined amount of time after the unit is turned off
(cooling or dry modes) to ensure that additional moisture is
removed from coil. Push the “X-FA ” button to enable this
feature. The X-FA icon will be displayed on remote
controller. To deactivate this feature, push the “X-FA ”
button again.
X-Fan Mode Display
Sleep Mode Display
13

OPERATIO OF WIRELESS REMOTE CO TROLLER
CLOCK BUTTO
Press the CLOCK button to enter Clock Setup Mode. The clock icon
will begin flashing. Set the clock by pressing the + or - buttons.
Press once for slow adjustment; press and hold down for fast
adjustment. When finished, press the CLOCK button to save your
clock settings. This is the current time, not the timer setting.
OTE: Clock time adopts 24-hour mode. A 12-hour format
is not available.
CHA GI G BATTERIES A D ADDITIO AL OTES
To change batteries, slide cover off battery compartment on back of remote controller. Remove and safely
discard old batteries. Insert two new AAA 1.5V dry batteries, using correct polarity. Reattach back cover.
OTE:
• If the remote controller will not be used for a long time, remove batteries to prevent leakage damage.
• Be sure to aim the remote controller at the receiver of the main unit when operating.
• When remote emits a signal, icon will flicker; a tone will be heard when unit receives that signal.
Remove
old batteries Install
new batteries
CHA GI G BATTERIES
Clock Display
TURBO MODE
The desired room setpoint can be achieved faster in TURBO
mode. After selecting the“HEAT”or“COOL” mode button,
push the“TURBO”button. The TURBO icon will be
displayed on the remote controller and the unit will run at an
ultra-high speed. To deactivate the feature, push the“TURBO”
button again. The unit will return to normal operation.
Turbo Mode Display
14

AIR FILTER CLEA I G
Changing your air filter on a regular basis prevents many problems. Dirty air filters will affect
the performance and the longevity of your unit. It is recommended that air filters be cleaned
every three (3) months.
Routine maintenance consists of checking the condensate drain for clogs, hosing off the outdoor
coil of outdoor unit and cleaning the air filter and the indoor decorative grille.
CARE A D CLEA I G
Turn off power and disconnect from indoor and outdoor units before cleaning. Failure to
do so could cause electric shock.
DECORATIVE GRILLE CLEA I G
Wash the decorative grille using warm water and mild detergent with a soft cloth or soft brush.
OTE: Do not use bleach, abrasives or water above 110°F (45°C) as it may cause
discoloration or damage to the surface of the unit.
WARNING
CAUTION
WARNING
WARNING
HOW TO REMOVE AIR FILTER
Remove the screw
Push the fastener
For the 24-42K cassette unit:
1. Push the latch as shown in the figure
2. Release the screws under clasps by a screwdriver.
3. Release the fastener and open the panel grille.
15

CARE A D CLEA I G
HOW TO CLEA AIR FILTER
1. Clean dust, lint and dirt from the air filter using a vacuum cleaner or
washing with water. If dirt is conspicuous, wash with a mild detergent in
lukewarm water. After washing air filter with water, let dry in the shade.
Do not expose the air filter to direct sunlight or direct heat to dry.
2. Reinsert the air filter into filter door, careful to align properly.
3. Close secure filter door.
Replace the screw
Re-install grille assembly
For the 18 and 48K cassette unit:
1. Remove screws with a screwdriver as shown.
2. Release the two fasteners and open the panel grille.
Remove the screw Push the fastener
Disassemble the air inlet grille:
1. Open the air inlet grille at 45°, lift up and remove the grille.
2. Disassemble the filter screen and remove it from the filter door.
16

TROUBLESHOOTI G
PROBLEM
System does not restart.
Indoor unit emits unpleasant odor
when started
You hear a“water flowing”sound.
A thin fog or vapor coming out
of the indoor unit when system is
running.
You hear a slight cracking sound
when the system stops or starts.
The system will not run.
The unit is not heating or cooling
adequately.
Water leakage from the
outdoor unit.
CAUSE/SOLUTIO
Cause: The system has a built-in three-minute delay to prevent short and/or rapid
cycling of the compressor.
Solution: Wait three minutes for the protection delay to expire.
Cause: Typically unpleasant odors are the result of mold or mildew forming on
the coil surfaces or the air filter.
Solution: Wash indoor air filter in warm water with mild cleaner. If odors persist,
contact a qualified service professional to clean the coil surfaces.
Cause: It is normal for the system to make“water flowing”or“gurgling”sounds
from refrigerant pressures equalizing when the compressor starts and stops
Solution: The noises should discontinue as the refrigerant system equalizes after
two or three minutes.
Cause: It is normal for the system to emit a slight fog or water vapor when
cooling extremely humid warm air.
Solution: The fog or water vapor will disappear as the system cools and
dehumidifies the room space.
Cause: It is normal for the system to make “slight cracking” sounds from parts
expanding and contracting during system starts and stops.
Solution: The noises will discontinue as temperature equalizes after 2 or 3 minutes.
Cause: There are a number of situations that will prevent the system from running.
Solution: Check for the following:
• Circuit breaker is “tripped” or “turned off.”
• Power button of remote is not turned on.
• Batteries in the remote controller are low.
• Remote controller is in sleep mode or timer mode.
• Otherwise, contact a qualified service professional for assistance.
Cause: There are a number of reasons for inadequate cooling or heating.
Solution: Check the following:
• Remove obstructions blocking airflow into the room.
• Clean dirty or blocked air filter that is restricting airflow into the system.
• Seal around door or windows to prevent air infiltration into the room.
• Relocate (if possible) other heat sources from the room.
Cause: It is normal for the outdoor unit to generate condensate
water in the reverse cycle heating and defrost mode.
Solution: This is normal. No action is required.
17

TROUBLESHOOTI G
PROBLEM
Water leaking from the indoor
unit into the room.
Wireless remote controller
does not work.
The unit will not deliver air.
Moisture or condensation
on the discharge air louvers
or outlet vents.
CAUSE/SOLUTIO
Cause: While it is normal for the system to generate condensate water in cooling
mode, it is designed to drain this water via a condensate drain system to a safe location.
Solution: If water is leaking into the room, it may indicate one of the following.
• The indoor unit is not level right to left. Level indoor unit.
• The condensate drain pipe is restricted or plugged. All restrictions must
be removed to allow continuous drainage by gravity.
• If problem persists, contact a qualified service professional for assistance.
Cause: There are a number of possible reasons
Solution: Check the following:
• The batteries might be low. Change the batteries.
• The remote controller must be within 25 ft. (7.5 m) with no obstructions
of the indoor unit. If remote controller needs to be replaced, contact a
qualified service professional for assistance. In the meantime, use the
optional Wired Tether Controller, if available.
Cause: There are a number of system functions that will prevent air flow.
Solution: Check for the following:
• In heat mode, the indoor fan may not start for three minutes if the room
temperature is very low. This is to prevent blowing cold air.
• In heat mode, if the outdoor temperature is low and humidity is high, the
system may need to defrost for up to 10 minutes before beginning a
heating cycle.
• In dry mode, the indoor fan may stop for up to three minutes during the
compressor off delay.
• Otherwise, you should contact a qualified service professional for assistance.
Cause: It is normal for the system to develop condensation or moisture on the
discharge air louvers when cooling warm humid air for a long period of time.
Solution: The condensation or moisture will disappear as the system cools and
dehumidifies the room space.
S top operation and call for service in the following circumstances:
• You hear a harsh or unusual sound during operation.
• Unusually foul odor is emitted during operation.
• Water is leaking in the room.
• You notice a burning smell or see smoke.
• Circuit breaker trips frequently, or unit stops abnormally often.
18
WARNING
CAUTION
WARNING
CAUTION

DIAG OSTIC CODES
o.
1
2
3
4
5
6
7
8
Description
If outdoor unit detects the high pressure switch is cut off for 3-sec
successively, high pressure protection will occur. All the loads
(except the 4-way valve in heating mode) will be switched off.
In this case, all the buttons and remote control signals except
ON/OFF button will be disabled and system won't be recovered
automatically. Switch off the unit or re-energize the unit after
cutting off power to eliminate this protection.
If indoor unit detects the evaporator temperature is lower than
protective temperate value after the unit has been running for a
period of time under cooling or dry mode, the unit will report this fault,
in which case the compressor and outdoor fan motor will be stopped.
The unit will not run until evaporator temperature is higher than
the protective temp. value and the compressor is stopped for 3-min.
If outdoor unit detects the discharge temperature is higher than
protective temperature value, the unit will report high discharge
temperature protection. If the protection occurs over 6 times, the
unit cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to reset this protection.
If the outdoor unit does not receive data from indoor unit,
communication malfunction will be reported. If there is
communication abnormality between display board and indoor
unit, communication malfunction will be reported.
If the indoor unit does not receive signal from indoor fan motor
for 30-sec successively when the fan motor is operating, indoor
fan motor malfunction will be reported. In this case, the unit can
automatically resume operation after stopping. If the malfunction
occurs 6 times within one hour, the unit cannot be recovered
automatically. Switch off the unit or re-energize the unit after
cutting off power to eliminate this malfunction.
If indoor unit detects the condensate overflow switch warning for
8-sec successively, the system will enter condensate overflow
protection. The unit will shut off and will not recover automatically.
Switch unit off and then switch it on to eliminate this malfunction.
If indoor unit detects the indoor ambient temperature sensor is open
circuit or short circuit for 5-sec successively, indoor ambient temp.
sensor malfunction will be reported. The unit can automatically
resume operation after the malfunction disappears. If indoor ambient
temperature sensor malfunction occurs in fan mode, only the error
code is displayed and the indoor unit will operate normally.
If indoor unit detects the evaporator temperature sensor is open
circuit or short circuit for 5-sec successively, evaporator temperature
sensor malfunction will be reported. The unit can automatically
resume operation after the malfunction disappears. If evaporator
temperature sensor malfunction occurs in fan mode, only the error
code is displayed and the indoor unit will operate normally.
Error
Code
E1
E2
E4
E6
E8
E9
F0
F1
Malfunction
ame
igh Pressure
Protection
Indoor Coil
Freeze
Protection
Compressor
igh Discharge
Temperature
Protection
Communication
Malfunction
Low Indoor
Airflow
Condensate
Overflow
Protection
Indoor Ambient
Temperature
Sensor at
Return Air Inlet
Malfunction
Indoor
Evaporator Coil
Temperature
Sensor
Malfunction
Origin of
Malfunction
igh Pressure
Switch
Indoor
Evaporator
Temperature
Sensor
Compressor
Discharge
Temperature
Comm. Failure
Between Indoor
and Outdoor
Main Board
Indoor
Fan Motor
Overflow
Switch
Indoor
Ambient
Temperature
Sensor
Evaporator
Coil
Temperature
Sensor
Error Codes
The U-Match System has on board diagnostics. The indoor unit and Tether Controller will display
error codes. The following is a summary of the codes with explanation:
19