GREE Ceiling Cassette Owner’s Manual

CEILING CASSETTE OWNER’S MANUAL

Models:
CAS12HP230V1AC
CAS18HP230V1AC
CAS24HP230V1AC

Thank you for choosing a Multi21 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.

INTRODUCTION

Superior Design for Superior Performance
Gree’s discreet Multi21 Ceiling Cassette provides low-noise performance through design and innovation. The Ceiling Cassette is a one-stop solution for heating and air conditioning in 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.

Gree’s cutting-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.

NOMENCLATURE

SAFETY PRECAUTIONS

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: DANGER , WARNING , and CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death.
WARNING signifies hazards that could result in personal injury or death.
CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions that will result in enhanced installation, reliability, or operation
NOTE: Your actual air conditioning & heating system and related devices may differ from the images shown in this manual.

WARNING
This appliance is not intended for use by children without responsible adult supervision. Proper care should be taken to ensure safety.
WARNING
Heat 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

• 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.

CAUTION

• Do not put hands or any objects into the air inlets or outlets. This may cause personal injury or damage to the unit.
• When cleaning, be careful not to splash water on the unit. Doing this may cause electric shock or damage to the unit.
• In the event of a failure (burning smell, etc.), immediately disconnect all electrical power to indoor and outdoor units.

SYSTEM PARTS

Part Name

1. Power Supply and Communication Wires
2. Drain Pipe
3. Liquid Pipe
4. Decorative Discharge Air
Grille (sold separately)
5. Gas Pipe
6.  Wired Tether Controller
7. Remote Controller| 8. Service Cover
9. Power Supply and Communication Wires
10. Front Panel
11. Outdoor Power Supply
12. Liquid Pipe
13. Gas Pipe
14. Drain Hose
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Outdoor Unit

CASGRILLE1SM

CASGRILLE1LG

MC20700140

| Decorative Grille  for 12,000 & 18,000 BTU Cassettes

Decorative Grille  for 24,000 BTU Cassette

XK-19 Wired Tether Controller with touch buttons.

CAUTION
The refrigerant pipe, drain pipe and electrical wiring for this unit should be installed by a qualified HVAC professional only.

SYSTEM FUNCTIONS

WHISPER QUIET
Not only are the Gree systems energy efficient but they are quiet too. Ceiling Cassette operates with sound levels starting as low as 37 dB(A).
MULTI FAN SPEEDS
Whether operating in either Cooling or Heating mode, the indoor fan can be set to your choice of three different speeds (Low, Medium or High) to achieve maximum comfort.
BUILT-IN CONDENSATE LIFT PUMP
The unit features a built-in drain pump that lifts condensate up to 39 inches 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.
CONDENSATE SENTRY
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.
INTELLIGENT PRE-HEATING
Multi21 Systems guard 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 unit the indoor coil has warmed up to prevent blowing uncomfortable cool air into the room.
CONTROLLERS
The Ceiling Cassette unit comes with a factory-supplied Wireless Remote Controller and a Wire Tether Controller.
WIRELESS REMOTE
The Gree multi-functional infrared handheld wireless controller is sleek, ergonomically designed, easy to use, and has a large backlit LCD display.
TETHER CONTROLLER
The Gree wired Tether Controller mounts to the wall up to 25 feet from the unit. it provides complete control over your unit’s operation mode, desired temperature, fan speed, air flow direction, and more.

INTELLIGENT 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.
SWING LOUVER
The adjustable swing louvers can be controlled from the wireless controller. Vertical swing louvers allow 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 INTAKE
The Ceiling Cassette has a ventilation air knockout that allows a 4-inch 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 Multi21 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 the 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.

MODE BUTTON
The unit can be set to five different operating modes: HEAT, COOL, DRY, FAN ONLY, and AUTO.
NOTE: AUTO MODE has fixed setpoints of 68° F heating and 77° F 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-FAN 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 the coil.
FAHRENHEIT °F / CELSIUS °C
The remote controller can be set to display in either °F or °C.
SELF-DIAGNOSIS
With an onboard computer using real-time diagnostics, the Gree Multi21 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.
AGENCY LISTINGS
All systems are listed with AHRI (Air conditioning, Heating, and Refrigeration Institute) and are ETL certified per UL Standards.

OPERATION OF WIRELESS REMOTE CONTROLLER

Part Name

1. ON/OFF Button
2. Down Button
3. Up Button
4. Fan Button
5. Mode Button
6. I Feel Button
7. Clock Button| 8. Timer On Button
9. Swing Louver Button
10. X-Fan Button
11. Timer Off Button
12. Turbo Button
13. Sleep Button
14. Light Button
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INTRODUCTION FOR ICONS ON DISPLAY SCREEN

REMOTE CONTROLLER OPERATIONS
The wireless remote controller is sleek, versatile and allows you to change room temperatures and functions on your Multi21 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 the factory to display temperatures in °F. If °C is desired, turn the remote controller OFF with the ON / OFF button and then press the “ MODE “ and “ “buttons on the remote simultaneously for 5 seconds.

ON/OFF BUTTON
When the system is in OFF mode, the remote controller will display the time and last room setpoint. When you press the ON/OFF button, this indicator will be displayed and the unit will start in the last operating mode and room setpoint.
NOTE: If the ON/OFF button is pressed too soon after a stop, the compressor will not start for 1 to 5 min. due to the inherent protection against frequent compressor cycling.

4-DIMENSION SWING LOUVERS

• Press the Vertical Swing Louver button to select five different vertical (up & down) air discharge directions including Contin Sweep. The Swing Louver icon will be displayed. Press button to set swing  angle, which changes in direction as below

Indicates louver swings back and forth in the five directions, as shown.

MODE BUTTON
Use the “ MODE ” button to select one of the available modes. The selected mode will be displayed on the remote controller and the appropriate light will illuminate on the front display panel.
AUTO – Unit will automatically select heating or cooling to maintain room temperature between 68°F and 77°F. The remote controller will display the Auto Mode icon with no setpoint.

COOL– To cool to selected setpoint and remove moisture. Press or to adjust set temperature. The system varies compressor speed to maintain the desired temperature.
HEAT – To heat to selected room setpoint. Press or to adjust set temperature. The system varies compressor speed to maintain desired room temperature.

FAN ONLY – To circulate air without heating or cooling. Use the Fan Speed button to select a speed from low to high.
DRY – Select DRY MODE to increase moisture removal during warm humid conditions. In this mode, fan speed cannot be adjusted.

1. If the Room Temperature is above or equal to the set temperature, the system will be operating with high fan speed for several minutes and then it will switch to the selected fan speed.
2. If the Room Temperature is below the set temperature, the system will be OFF and the indoor fan will be at low speed.

I FEEL MODE
Press this button to use the I FEEL function, and the ( ) icon will be displayed. 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. Press the button again to exit this function. For best performance, keep the remote controller away from heat or cold temperature sources while using this function.

TIMER SETTING
Timer-ON / Timer-OFF BUTTON
To set when you want the unit to turn On at the end of a selected time period, use the button labeled “Timer-ON /Timer-OFF” on the remote controller. Press this button to ake the clock icon disappear replaced with the word “ON” (blinking). Press or buttons to adjust timer setting 1 minute at a time. Press and hold or button to set the timer more quickly. Press the “Timer-ON /Timer- OFF” button again to confirm the setting, and the word “ON” will stop blinking. To cancel, press the “Timer-ON /Timer-OFF” button again. To set when you want the unit to turn Off at the end of a selected time period, use the same button. Press this button to make the clock icon disappear,  replaced with the word “OFF” (blinking). Adjust settings the same as with the “Timer-ON /Timer-OFF” settings.

NOTE: Under Timer On and Off status, you can set“Timer-ON / Timer-OFF” simultaneously. Before setting the timer, be sure to set the clock to the correct time.

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.

LIGHT BUTTON
Press this button to turn off the display light on the indoor unit.
Press again to turn it back on.

FAN BUTTON
Press the FAN button to adjust the indoor fan speed:
Low ( ), Medium ( ), High ( ), Turbo and Auto.

• The Turbo function is not available in Dry and Auto mode.
• The fan operates at low speed in Dry and Auto modes, and the speed cannot be adjusted.
• When Auto is selected, the unit will select the proper fan speed automatically, according to the ambient temperature.
  NOTE: Turbo function is not available in Dry and Auto Modes.
  The Multi21 Ceiling Cassette unit will select proper fan speed automatically according to ambient temperature.

CLOCK SETTING
Press this button to set the clock time.“ ” icon on the remote controller will blink. Within 5 seconds, press or button to set the clock time. With each pressing of or buttons, the clock time will increase or decrease by 1 minute. To quickly adjust the time setting, press and hold   or button for 2 seconds. Release button when you have reached the desired time setting. Press the “CLOCK” button to confirm the time, and the “ ” icon will stop blinking.

NOTE: Clock time adopts 24-hour mode. A 12-hour time format is not available.

PRIVACY LOCK
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 5 seconds. The Privacy Lock icon will be displayed on the remote controller. Repeat the process to unlock the remote controller.

SLEEP MODE
The Multi21 Ceiling Cassette system 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 or Cancel. The SLEEP icon will appear.

TRADITIONAL MODE – SLEEP
In Traditional Mode the unit will slowly relax the room set temperature by up to 4° F until  Sleep Mode is canceled.
In Cool or Dry modes:
The unit will run at the current room setpoint for 1 hour. After 1 hour, the setpoint will increase by 2°F (1℃). After 2 hours, the setpoint will increase by 4°F (2℃) and maintain this setpoint until Sleep Mode is canceled.
In Heat mode:
The unit will run at the current room setpoint for 1 hour. After 1 hour, the setpoint will decrease by 2° F (1℃). After 2 hours, the setpoint will decrease by 4°F (2℃) and maintain this setpoint until Sleep Mode is canceled.

CHANGING BATTERIES AND ADDITIONAL NOTES
To change batteries, slide the cover off the battery compartment on the back of the remote controller. Remove and safely discard old batteries. Insert two new AAA 1.5V dry batteries, using correct polarity.
Reattach back cover.

NOTE:

• 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 the remote emits a signal, the icon will flicker; a tone will be heard when the unit receives that signal.

CHANGING BATTERIES

ON/OFF BUTTON
Press On/Off to turn On the unit. Press again to turn it Off.

MODE SETTING
When the unit is ON, press the Mode button to select an operating mode. It will change sequentially as shown below: Auto–Cool–Dry–Fan–Heat

TEMPERATURE SETTING
Press ▲ or ▼ to increase/decrease the setpoint temperature as shown below. In Cool, Dry, Fan, or Heat mode, the setpoint temperature range is 61°-86°F. In Auto mode, the setpoint temperature is not adjustable.

FAN SETTING
When the unit is ON, press the Fan button to select the fan speed of the indoor unit.
It will change sequentially as shown below.

TURBO MODE
Turbo mode will force the unit up to the maximum capacity to heat or cool the room in the shortest amount of time. Turbo Mode can only be used on Heat or Cool modes.

Turbo Setting
Press the Function button until the Turbo icon is displayed. Then press Enter/Cancel to confirm. To cancel, press the Function button to re-enter the Turbo setting status, then press Enter/Cancel.

TIMER SETTING
The Multi21 System has two timer modes. The Timer-On mode will turn the unit ON after the preset time period. The Timer-Off Mode will turn the unit OFF after the preset time period. The preset time period can be from 0.5 to 24 hours in 0.5-hour increments.

Timer-On Setting
Turn the unit Off, press the Timer button. The OFF icon will flash and the hours will be displayed.
Set the time period for the unit to remain OFF before turning ON by pressing the ▲ or ▼ buttons. Press the Timer button to confirm and start Timer-On mode.

Timer-Off Setting
Turn the unit On, press the Timer button. The ON icon will flash and the hours will be displayed.
Set the time period for the unit to remain ON before turning OFF by pressing the ▲ or ▼ buttons. Press the Timer button to confirm and start Timer-Off mode.

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:
The unit will run at the current room setpoint for 1 hour. After 1 hour, the setpoint will increase by 2° F. After 2 hours, the setpoint will increase by 4° F and maintain this setpoint until Sleep Mode is canceled.

In Heat mode:
The unit will run at the current room setpoint for 1 hour. After 1 hour, the setpoint will decrease by 2° F. After 2 hours, the setpoint will decrease by 4° F and maintain this setpoint until Sleep Mode is canceled.

Sleep Setting
Turn the unit On and select a mode (ex. Heat, Cool, or Dry). Press the Function button until the Sleep icon appears on the display. Press the Enter/Cancel button to start Sleep Mode.

X-FAN MODE
The X-Fan function may only be selected in Cool and Dry modes. After the unit is turned Off, the X-Fan function will keep the indoor fan running for 2 minutes to dry the indoor evaporator coil to help avoid mold and mildew growth.

X-Fan Settings
Turn the unit On and select Cool or Dry mode. Press the Function button until the X-fan icon is displayed and then press Enter/Cancel to activate this function.

I-FEEL MODE
The indoor unit will sense room temperature at the wired Tether Controller instead of at the return air section of the indoor unit.

I-Feel Settings
Press the Function button until the I-Feel icon is displayed, then press Enter/Cancel to activate the function.

POWER FAILURE MODES
The unit has two selectable system power-up modes:
IMPORTANT: This mode arrives set at “factory default,” but should not be left there. It must be reset to “Power Failure Recovery,” especially for use in commercial  T/server/computer rooms.
Power Failure Recovery
After the initial power-up, the unit will store user selections and system parameters in non-volatile memory. These parameters are retained during a power failure. When power is returned, the system will automatically return to the last operating mode.
Power Failure Standby
The system will power up in standby or off mode. This is the factory default setting.
POWER FAILURE MODE SETTINGS
To set Power Failure Recovery Mode, turn the unit OFF and press the Mode and ▲ buttons simultaneously for 5 seconds until the MEMORY Icon is displayed.
Repeat the process to select Standby mode. In Standby mode, the Memory icon is not displayed.

CELSIUS OR FAHRENHEIT TEMPERATURE DISPLAY
The wired Tether Controller is set from the factory to display temperature in Fahrenheit ( Fº ). If Celsius (Cº) is desired, turn the unit OFF, press the Mode and ▼ buttons at the same time for 5 seconds to alternate between temperature displays.

PRIVACY LOCK
The Privacy Lock prevents unauthorized access to the unit controls and prevents tampering with system settings. To lock the wired Tether Controller, press ▲ and ▼ buttons simultaneously for 5 seconds and the Lock Icon will be displayed. Repeat the process to unlock the Tether Controller and cancel Privacy Lock.

Routine maintenance consists of checking the condensate drain for clogs, hosing off the outdoor coil of the outdoor unit, and cleaning the air filter and the indoor decorative grille.

CARE AND CLEANING

WARNING
Turn off the power and disconnect from indoor and outdoor units before cleaning. Failure to do so could cause electric shock.

DECORATIVE GRILLE CLEANING
Wash the decorative grille using warm water and mild detergent with a soft cloth or soft brush.
NOTE : 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.

AIR FILTER CLEANING
Changing your air filter on a regular basis prevents many problems. Dirty air filters will affect the performance and longevity of your unit. It is recommended that air filters be cleaned every three (3) months.

HOW TO REMOVE AIR FILTER
For the 24K 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.

For the 12 and 18K cassette unit:

1. Remove screws with a screwdriver as shown.
2. Release the two fasteners and open the panel grille

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.

HOW TO CLEAN 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 the 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 the filter door, careful to align properly.

3. Close secure filter door.

TROUBLESHOOTING

delay to prevent short and/or rapid cycling of the compressor.
Solution:  Wait three minutes for the protection delay to expire.
The indoor unit emits unpleasant odor
when started| 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 a mild cleaner. If odors persist, contact a qualified service professional to clean the coil surfaces.
You hear a“water flowing” sound.| 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.
A thin fog or vapor coming out
of the discharge register when
the system is running.| 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.
You hear a slight cracking sound
when the system stops or starts.| 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 the temperature equalizes after 2 or 3 minutes.
The system will not run.| 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 the controller is not turned on.
• Controller is in sleep mode or timer mode.
• Otherwise, contact a qualified service professional for assistance.
The unit is not heating or cooling
adequately.| 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 filters that is restricting airflow into the system.
• Seal around the door or windows to prevent air infiltration into the room.
• Relocate or remove heat sources from the room.
Water leaking from the indoor
unit into the room.| 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 the problem persists, contact a qualified service professional for assistance.
The unit will not deliver air.| Cause: There are a number of system functions that will prevent airflow.
Solution:  Check for the following:
• In heating 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.

DIAGNOSTIC CODES

Malfunction Name| Indoor Unit
& Remote
Display| Outdoor Unit Indicators| Possible Causes
---|---|---|---
Yellow| Red
Liquid Valve Coil Temperature
Sensor Malfunction| b5| | | 1) Loose or bad connection between sensor and control board
2) Liquid  valve temperature sensor damaged
3) Control board malfunction
Gas valve temperature sensor
is open/short-circuited| b7| | | Hardware malfunction
System Configuration
Malfunction| C5| | | 1) No jumper cap inserted on the control board
2) Incorrect or damaged jumper cap on control board
3) Indoor and outdoor units are not compatible
Wrong connection of communication
wire or malfunction of electronic
expansion valve| dn| | | Hardware malfunction
System High Pressure| E1| | | 1) Over charged with refrigerant
2) Blocked or dirty outdoor coil
3) Extreme outdoor ambient conditions
Indoor Anti-Freeze Protection| E2| 3 flashes
and 1 sec Off| | 1) Low return airflow
2) Indoor fan speed is too low
3) Indoor coil is blocked or dirty
Low Pressure Protection| E3| | 9 flashes
and 1 sec Off| 1) Low on refrigerant
2) Pressure sensor is damaged
Compressor High Discharge
Temperature Protection| E4| 7 flashes
and 1 sec Off| | Please refer to the malfunction analysis (discharge
temperature, overload) in service manual
Overcurrent Protection| E5| 5 flashes
and 1 sec Off| | 1) Supply voltage is unstable
2) Supply voltage is too low and system load is too high
3) Indoor coil is blocked or dirty
Communication Malfunction| E6| Continuous
On| | 1) Communication cable is mis-wired between indoor
and outdoor units
2) Indoor or Outdoor control board malfunction
Mode conflict (Indoor units
calling for simultaneously
Heating and Cooling)| E7| | | Operation status
High Temperature
Resistant Protection| E8| 6 flashes
and 1 sec Off| | 1) Incorrect refrigerant charge level
2) Refrigerant metering device malfunction
3) Compressor malfunction
Cold Air Protection| E9| | | 1) Indoor coil has not reach minimum heating temperature
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
EEPROM Memory Malfunction| EE| 11 flashes
and 1 sec Off| | Control board malfunction
Module Phase Current Protection –
Frequency Decrease/Limit Mode| En| | | Outdoor control board malfunction
Module Temperature Protection –
Frequency Decrease/Limit Mode| EU| | 11 flashes
and 1 sec Off| 1) IPM module over heating or malfunctioning
2) Improper voltage at IPM Module
Refrigerant Leakage Protection| F0| | 9 flashes
and 1 sec Off| 1) refrigerant leak(s)
2) Indoor coil temperature sensor no calibrated
3) Refrigerant flow is restricted ( ex. valve, exv, debris)
Indoor Ambient Temperature
Sensor Malfunction| F1| | | 1) Loose or bad connection between sensor and control board
2) Indoor ambient temperature sensor damaged
3) Control board malfunction
Indoor Coil Temperature
Sensor Malfunction| F2| | | 1) Loose or bad connection between sensor and control board
2) Indoor coil temperature sensor damaged
3) Control board malfunction
Outdoor Ambient Temperature
Sensor Malfunction| F3| | 6 flashes
and 1 sec Off| 1) Loose or bad connection between sensor and control board
2) Outdoor ambient temperature sensor damaged
3) Control board malfunction
Outdoor Coil Temperature
Sensor Malfunction| F4| | 5 flashes
and 1 sec Off| 1) Loose or bad connection between sensor and control board
2) Outdoor coil temperature sensor damaged
3) Control board malfunction
Outdoor Discharge Temperature
Sensor Malfunction| F5| | 7 flashes
and 1 sec Off| 1) Loose or bad connection between sensor and control board
2) Discharge  temperature sensor damaged
3) Control board malfunction
Compressor Overload Protection –
Frequency Decrease/Limit Mode| F6| | 3 flashes
and 1 sec Off| 1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
Oil Return Protection – Frequency
Decrease/Limit Mode| F7| | | Normal function status code only
System Current Overload Protection Frequency
Decrease/Limit
Mode| F8| | 1 flash
and 1 sec Off| 1) Input voltage too low
2) System pressure too low
High Compressor Discharge
Temperature – Frequency
Decrease/Limit Mode| F9| 2 flashes and
1 sec Off| 4 flashes
and 1 sec Off| 1) Cooling load is too great
2) Outdoor ambient temperature too high
3) Refrigerant charge too low
4) Metering device malfunction
Indoor Coil Freeze Protection –
Frequency Decrease/Limit Mode| FH| | | 1) Indoor coil has not reached minimum heating temperature
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
Pump Down or Gathering
Refrigerant Status| Fo| 17 flashes
and 1 sec Off| | Optional Service Mode
Defrost Mode in Heating| H1| | | Operation status
Compressor Overload Protection| H3| 8 flashes
and 1 sec Off| | 1) Wiring terminal OVC-COMP is loose
2) Refer to the malfunction analysis in Service Manual
IPM Module Protection| H5| 4 flashes
and 1 sec Off| | 1) IPM module overheating
2) Improper or Low voltage at the IPM module
3) IPM module malfunction
Indoor DC Fan Motor
Malfunction| H6| | | 1) Loose connections between fan motor and control board
2) fan motor or blower wheel bearings malfunction
3) Control board malfunction
Compressor De-Synchronized
Malfunction| H7| | | 1) Compressor voltage is not balance
2) Control board malfunction
3)  Compressor malfunction
Power Factor Correction (PFC)
Protection| HC| | 14 flashes
and 1 sec Off| 1) Mis-wiring of the reactor filter and PFC capacitor
2) Reactor filter or  PFC capacitor malfunction
3) Control board malfunction
Compressor Demagnetization
Protection| HE| | | Compressor malfunction
High Input Power Protection| L9| 9 flashes
and 1 sec Off| | 1) Compressor malfunction
2) Power circuit malfunction
Start-Up Malfunction| LC| | | 1) Over charged with refrigerant
2) Control board malfunction
3) Compressor malefaction
Compressor phase-lacking/
phase-inverse protection| Ld| | | Hardware malfunction
Incompatible Indoor and
Outdoor Units| LP| 16 flashes
and 1 sec Off| | Indoor and outdoor units are not compatible
Compressor Phase Current
Protection| P5| | | 1) IPM module malfunction
2) Outdoor control board malfunction
3) Compressor malfunction
Module Temperature Sensor
Malfunction| P7| | | Outdoor control board malfunction
Module Temperature Protection| P8| | | 1) Lack of thermal grease on IPM module
2) Heat sink (radiator) not tightly mounted
3) Control board malfunction
High DC Bus Voltage Protection| PH| 13 flashes
and 1 sec Off| | 1) Supply voltage on L1 and N is above 265Vac
2) Capacitor on control board malfunction
3) Outdoor control board malfunction
Low DC Bus Voltage Protection| PL| 12 flashes
and 1 sec Off| | 1) Supply voltage on L1 and N is below 150Vac
2) Capacitor on control board malfunction
3) Outdoor control board malfunction
Capacitor Charging Malfunction| PU| | | Capacitor malfunction
Compressor Phase-Current
Detection Malfunction| U1| | | Outdoor control board malfunction
DC Bus Voltage Dip| U3| | | Outdoor control board malfunction
Input Current Detection  Malfunction| U5| | | Outdoor control board malfunction
The four-way valve is abnormal| U7| | | Hardware malfunction
Zero cross detection circuit
malfunction(for indoor unit)| U8| | | Hardware malfunction

Notes : 1) During the defrosting process, the heating indicator is on for 10s and off for 0.5s.
2) Refer to Service Manual for additional information.

ENERGY-SAVING TIPS

1. Relaxing room temperature at night is OK: During the nighttime hours, you don’t require the same level of conscious cooling or heating. Try using Sleep Mode to gradually relax room temperature and allow the unit to run less and save energy.

2. Curtains and shades: In the summer, you need to block the effects of the sun. Close window curtains and shades on the south and west side of your home to help block solar heat. In winter, the sun is your friend. Open curtains and shades to allow solar heat into your room.

3. Close doors: If you don’t need to heat and cool your whole home, confine the heating and cooling to one room by closing doors. Limit the space you’re heating and cooling to the specified capability of the unit.

4. Service the unit : Some basic maintenance might be all you need. The outdoor unit will greatly benefit from a good hosing out, especially in treed areas where seeds and other debris can stick to coil fins and make the unit work up to 15% harder!

5. Rearrange the room: Furniture that obstructs airflow means you could be heating and cooling the back of a chair or the front of a sofa instead of the actual living space. Remove or rearrange obstacles blocking airflow.

6. Try 75 degrees: 75°F is a good point for an air conditioner to run at its optimal performance level. Even a 5-degree change in temperature can make your unit use up to 40% more energy!

7. Lighting: Turning lights off can help reduce your heat. Each light bulb is a tiny heater.
   Your air conditioner must waste energy overcoming the heat from your lights to reach and hold your desired room temperature.

8. Is anyone home? If possible, while you’re away turn your unit to Auto mode and make sure windows and drapes are closed. Although room temperature may be less than optimal for a few minutes when you come home, the unit will soon have the room back to your desired temperature.

9. Don’t forget the fan: The fan is much like a car. The faster it runs, the more energy it uses. Sometimes we need the car to go fast, but slow is good enough most of the time. Try saving money by using the comfortable quiet low fan speed as much as possible.

LIMITED WARRANTY STATEMENT

FOR WARRANTY SERVICE OR REPAIR: Contact your installing contractor. You may find the installer’s name on the equipment or in your Owner’s packet or on your invoice.
ONLINE REGISTRATION IS AVAILABLE AT: www.greecomfort.com/resources/product- warranty/
Or complete product registration below:

Email completed form to: service@twclimate.com
or
Send a copy of completed form to:
Gree Warranty Registration
14610 Breakers Dr.
Jacksonville, FL 32258

• Keep a copy of the completed form for your files.

PRODUCT REGISTRATION

Indoor Model No:
Outdoor Model No:
Owner Name:
Serial No:
Serial No:
Date of Installation:
Address of Installation:
Installing Contractor:
Address:
Phone No. / Email:

GREE distributor (hereinafter “Company”) warrants this product against failure due to defects in materials or workmanship under normal use and maintenance as follows. All warranty periods begin on the date of original installation. If the date cannot be verified, the warranty period begins one hundred twenty (120) days from the date of manufacture. If a part fails due to a defect during the applicable warranty period, Company will provide a new or remanufactured part, at Company’s option, to replace the failed defective part at no charge for the part. This limited warranty is subject to all provisions, conditions, limitations, and exclusions listed below.

• A warranty period of Five (5) years on all parts to the original registered end-user when installed in a residential application.
• A warranty period of One (1) year on all parts to the original registered end-user, when installed in commercial applications.
• A warranty period of 90 days on remote controls from purchase date.
• The limited warranty applies only to systems that are properly installed by a state-certified or licensed HVAC contractor, under applicable local and state law in accordance with all applicable building codes and permits; GREE installation and operation instructions and good trade practices.
• Warranty applies only to products remaining in their original installation location.
• Defective parts must be returned to the distributor through a registered servicing dealer for credit.

LIMITATIONS OF WARRANTIES: ALL IMPLIED WARRANTIES AND/OR CONDITIONS (INCLUDING IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR USE OR PURPOSE) ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY, SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY OR CONDITION LASTS, SO THE ABOVE MAY NOT APPLY TO YOU.  THE EXPRESS WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON, WHATSOEVER.

THIS WARRANTY DOES NOT COVER:

1. Labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of either defective parts, or
   replacement parts, or new units.

2. Product cleaning is required prior to warranty service and repair.

3. Normal maintenance as outlined in the installation and servicing instructions or Owner’s Manual, including filter cleaning and/or replacement and lubrication.

4. Failure due to faulty installation or repairs, damage, misapplication, abuse, improper servicing, lack of or insufficient maintenance, unauthorized alteration or improper operation.

5. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due to the inadequacy or interruption of electrical service.

6. Failure or damage due to floods, winds, fires, lightning, accidents, corrosive environments(rust or residue etc.) or other conditions beyond the control of the Company.

7. Failure or damage of coils, piping or other parts due to corrosion, when installed within one (1) mile of sea coast or corrosive body.

8. Parts not supplied or designated by Company, or damages resulting from their use.

9. Products installed outside the 48 contiguous United States, except the District of Columbia and Hawaii.

10. Electricity or fuel costs, or increases in electricity or fuel costs from any reason whatsoever, including additional or unusual use of supplemental electric heat.

11. Any cost to replace, refill or dispose of refrigerant, including the cost of refrigerant.

12. Shipping damage or damage as a result of transporting the unit.

13. Accessories such as condensate pumps, line sets and so forth are not covered.

14. Any special, indirect or consequential property or commercial damage of any nature whatsoever. Some states do not allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.

15. Consumable components, such as air filters, are not covered under parts warranty.
    This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

CAT NO: GREE_MULTI_CASSETTE_A_OWNERS_050119

References

• System Documentation | GREE Comfort

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