Gree Cassette B Series User manual

OWNER’S
MANUAL
Indoor Unit
CAS12HP230V1BC
CAS18HP230V1BC
CAS24HP230V1BC
MODELS:
CAT NO:GREE_CASSETTE B_OWNERS_11102022
Thank you for choosing our product.
Please read this Owner’s Manual carefully before
operation and retain it for future reference.
To download an electric version of this manual visit
https://gree-comfort-dev.web.app/system-documentation/

Thank you for choosing a Cassette B Series indoor unit!
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.
TABLE OF CONTENTS
Nomenclature...................................................................................................................................................................... 3
Safety Precautions............................................................................................................................................................. 4
Part Names.......................................................................................................................................................................... 6
System Functions ...............................................................................................................................................................7
Wired Controller ................................................................................................................................................................. 9
Operation of Remote Contoller .......................................................................................................................................16
Care and cleaning..............................................................................................................................................................21
Troubleshooting................................................................................................................................................................22
Energy Saving Tips.......................................................................................................................................................... 23
Warranty............................................................................................................................................................................. 24
Owner’s manual FAQ

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 3
NOMENCLATURE
EXAMPLE: CAS18HP230V1BC
CAS 18 HP 230V 1 B C
Revision Level
Electrical Rating
230V - 208/230V-1PH-60Hz
Style/Color Designation
Product Type
O – Outdoor Units
C – Indoor Cassette
D – Indoor Slim Duct
F – Indoor Floor/Ceiling
Model Type
HP – Heat Pump
Capacity
12 – 12,000 BTUH
18 – 18,000 BTUH
24 – 24,000 BTUH
Series Designation
CAS – Cassette
DUCT – Slim Duct
FLR – Floor/Ceiling
CONS – Mini Console
Nomenclature

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 4
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 which 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 which 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.

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 5
Please read the following before operation
CAUTION
• 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.
• Do not use or place any flammable, combustible or noxious substance next to the unit.
• In the event of a failure (burning smell, etc.), immediately disconnect all electrical power to indoor and
outdoor units.
• Never try repairing the system yourself; contact a qualified service technician for all repairs.
SAFETY PRECAUTIONS (Continued)

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 6
PART NAMES
Part Name
1. Drainage device
2. Drainage pipe
3. Air Flow flap
4. Connection pipe
5. Wired Controller
6. Remote Controller
7. Big handle
8. Liquid Pipe
9. Gas pipe
10. Drainage pipe
11. Front Board
Indoor unit
Outdoor unit
2
3
4
7
5 6
1
8
9
10
11
Air inlet
Air outlet
Fig.1
DISCLAIMER
Not all items shown may
be included with equipment
purchase.Consult your
equipment supplier for a list
of all items included for
your application.

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 7
SYSTEM FUNCTIONS
WHISPER QUIET
Not only are the GREE systems energy efficient but they are quiet too. Cassette B Series units operate with sound
pressure levels starting as low as 34 dB(A).
MULTI FAN SPEEDS
Whether operating in either Cooling or Heating mode, the indoor fan can be set to your choice of fan speed plus Turbo
to achieve maximum comfort.
INTELLIGENT PREHEATING
This system 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.
I-FEEL FUNCTION
The unit will sense room temperature at the remote controller instead of at the indoor unit. It then adjusts airflow and
temperature accordingly for ultimate personal comfort.
ADJUSTABLE AIRFLOW
The Cassette B Series system has a four directional airflow for maximum comfort. The indoor unit
has adjustable vertical swing louvers and can be set from the remote or wired controller.
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.
VACATION MODE (FREEZE GUARD)
Vacation mode (freeze guard) sets the unit to 46°F (8°C) in heating to keep the temperature in the space above freezing.
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.
SLEEP MODE
The Cassette B Series offers a Sleep Mode function for your comfort. The unit will automatically adjust room

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 8
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.
ENERGY SAVINGS MODE
This feature will automatically select the optimal compressor and fan speeds to allow for energy savings while
operating in Cooling or Heating modes. The compressor and fan will automatically slow down as the room temperature
reaches the set point.
SELF-DIAGNOSIS
Your Cassette B Series has a built-in computer which uses real-time diagnostics which help prolong the unit’s life.
The automatic diagnosis feature continuously scans for errors or malfunctions and fault codes are shown on the unit
display to facilitate troubleshooting and repair.
POWER FAILURE MODE
Power interruptions are no problem for the Cassette B Series 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
Cassette B Series system will automatically return to the last operating mode.
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 build up. Once frost buildup has been detected, the
system will switch into a defrost mode to remove the frost.
WASHABLE POLYMERIC AIR FILTER
The polymeric mesh filters save energy by preventing the indoor coils from being plugged with dirt and lint. This
economical and sturdy filter may be washed, vacuumed and reused.
FAHRENHEIT / CELSIUS
The remote controller and wired controller can be set to display in either °F or °C.
REMOTE LOCK-OUT
The remote controller has a Lock feature. The 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.
SYSTEM FUNCTIONS (Continued)

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 9
WIRED CONTROLLER (XE72)
1 Symbols on LCD
1.1 Outside View of the Wired Controller
No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
Display
Auto
Cool
Dry
Fan
Heat
Sleep
Fresh air
Quiet
Health
46°F Vacation mode
I-DEMAND
WiFi
Lock-out
Up & down swing
Follower wired controller
Fan speed
No card
Left & right swing
X-fan
Temperature
E-heater
Memory
Clean
Save
Defrost
Timer
Shield
Instruction of Display
Automatic mode (under auto mode, the indoor unit will
select its operating mode according to the variation of room
temperature)
Cooling mode
Dry mode
Fan mode
Heating mode
Display when sleep function is set
This function is unavailable for this unit
Display when sleep function is set
This function is unavailable for this unit
Display when 46°F Vacation mode is set
Display when I-DEMAND function is set
Display when WiFi function is set
Lock-out status, display when lock-out function is set
Display when up and down swing function is set
Icon of follower controller, it will display when follower wired
controller is set (this function is unavailable for this unit)
The fan speed set currently (including auto, low, medium low,
medium, medium high, high, and turbo)
This function is unavailable for this unit
Display when left and right swing function is set
Display when X-fan function is set
It will display the setting temperature
This function is unavailable for this unit
Memory status (After power failure and re-energizing the
unit, it will resume to ON/OFF status of unit before the power
failure)
Filter washing reminder (this function is unavailable for this
unit)
Display when energy-saving function is set
Defrosting status
Display when timer status is set
Shielding status
1.2 LCD of the Wired Controller
DISCLAIMER
All functions are not available for
this unit.
Fig. 1 Outside View
Fig. 2 LCD of the Wired Controller

CASSETTE B SERIES OWNERS MANUAL - INDOOR UNIT | 10
2 Buttons
2.1 Buttons on the Wired Controller
2
213
4
5678
Fig. 3 Buttons on the Wired Remote Controller
No.
1
3
7
6
4
5
2
8
3+4
6+7
3+7
4+7
2+5
2+5
5+6
Display
SWING/ENTER
FAN
MODE
FUNCTION
TIMER
ON/OFF
+ MODE
FAN +
+
MODE +
TIMER+FUNCTION
TIMER+FUNCTION
FUNCTION + FAN
Instruction of Display
1Function selection and cancellation.
2Setting of the up and down swing function.
1Running temperature setting of the indoor unit, range:61~86°F(16~300C).
2Timer setting, range:0.5-24 hr.
Setting of the auto/low/medium low/medium/medium high/ high fan speed.Heating mode
Setting of the Cooling/Heating/Fan/Dry/Auto mode of the indoor unit.
Switchover among the functions of Turbo/WiFi/X-fan etc..
Timer setting.
Turn on/off the indoor unit.
Press them for 5s under off state of the unit to Enter/Cancel the Memory function(If memory is set, indoor unit after power
failure and then power recovery will resume the original setting state. If not, the indoor unit is defaulted to be off after power
recovery. (Memory off is the factory default setting).
By pressing them at the same time under off state of the unit, will be displayed on the wired controller for the cooling only
unit, while will be displayed on the wired controller for the cooling and heating unit.
Upon startup of the unit without malfunction or under off state of the unit, press them at the same time for 5s to enter the lock
state, in which case, any other buttons won’t respond.
Repress them for 5s to quit this state. Under OFF state, the Celsius and Fahrenheit scales can be switched by pressing “MODE”
and “ ” for 5s.
Under OFF state, go to the commissioning status by pressing “FUNCTION” and “TIMER” for five seconds, and let “00” displayed
on he temperature display area by pressing “MODE”, then adjust the options which is shown on the timer area by pressing “ ”
and “ ”. There are four options, as follows:
1Indoor ambient temperature is sensed by the return air temperature sensor (01 displayed on the timer area).
2Indoor ambient temperature is sensed by the wired controller (02 displayed on the timer area).
3The return air temperature sensor is selected under the cooling, dry, or fan mode; while the wired controller temperature
sensor is selected under the heating or auto mode. (03 is displayed on the timer area).
4The wired controller temperature sensor is selected under the cooling, dry, or fan mode; while the return air temperature
sensor is selected under the heating mode. (04 is displayed on the timer display area).
Under OFF state, go to the commissioning status by pressing “FUNCTION” and “TIMER” for five seconds. Press “MODE” button
to until “01” icon is shown at the temperature display area. The setting status will be shown at timer area. Press “ ” and “ ”
button to adjust and two options are available: 1Three low levels (01) ; 2Three high levels (02).
Reset the WiFi function: Under off status, press “FUNCTION” + “FAN” combination buttons on its wired controller for 5s. Once
“oC” is displayed, this indicates that reset was successful.
WIRED CONTROLLER (Continued)