Gree Slim Duct B Series

Questions and Answers

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Sara HammondAug 16, 2025
Why is my Gree Slim Duct B Air Conditioner not coming on?
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  Robert CookAug 16, 2025
  Your Gree Air Conditioner might not be turning on due to several reasons. It could be a power failure, in which case you should wait until the power is restored. There might be loose wiring, requiring you to contact your contractor or an electrician. Another potential cause is a tripped circuit breaker or a burnt-out fuse, which would need professional replacement. Overheating wiring may also be the issue and needs professional repair or replacement. If the unit has restarted immediately after stopping, turn it off, wait 3 minutes, and then turn it back on. Also, ensure that the remote controller shows the correct settings by resetting the function.
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Autumn DunnAug 19, 2025
What to do if Cooling / Heating is insufficient in my Gree Slim Duct B Air Conditioner?
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  Darren MitchellAug 19, 2025
  If your Gree Air Conditioner isn't cooling or heating sufficiently, several factors could be the cause. The voltage might be too low, potentially requiring an HVAC technician. A dirty filter could be restricting airflow, so try cleaning the filter. Make sure the set temperature is appropriate and adjust it if necessary. Finally, check if any doors or windows are open, and close them to improve efficiency.
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Eric GomezAug 22, 2025
Why is my Gree Slim Duct B indoor unit isn’t receiving the remote controller signal?
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  ijacksonAug 22, 2025
  If your Gree Air Conditioner's indoor unit isn't responding to the remote, consider these possibilities: static electricity interference—disconnect power at the breaker for 3 minutes. Ensure the remote is within the 26 ft signal range and has a clear path to the indoor unit receiver. Verify you're pointing the remote at the receiving window at the proper angle. Check the remote's batteries and replace them if they're weak, or replace the remote if it appears damaged. Electronic interference could also be a factor; try moving closer to the indoor unit and turning off other electronics.
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fhollandAug 26, 2025
How to fix no air coming from Gree Slim Duct B Air Conditioner indoor unit?
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  Denise TuckerAug 26, 2025
  If no air is coming from your Gree Air Conditioner's indoor unit, check for these issues: ensure that neither the air inlet nor the air outlet is blocked by any obstacles and eliminate them. If you are in HEAT mode, the indoor fan will stop once the set temperature is reached. Also, if you've just turned on the HEAT mode, it's normal for the fan to take several minutes to start to prevent cold air from blowing out.
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douglascoxAug 28, 2025
Why can’t I adjust the “Set” temperature on my Gree Air Conditioner?
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  Francis Ramirez MDAug 28, 2025
  You might not be able to adjust the set temperature on your Gree Air Conditioner because your desired temperature is outside the allowed range. The set temperature range is 16°C~30°C (61°F~86°F).
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Brianna LeonAug 31, 2025
Why is there mist coming from Gree Air Conditioner indoor unit’s air outlet?
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  Kim BrownAug 31, 2025
  The mist coming from your Gree Air Conditioner's indoor unit's air outlet is likely due to high indoor temperature and humidity. This occurs when the indoor air is cooled rapidly. The mist should disappear as the indoor temperature and humidity decrease over time.
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Jonathan PorterSep 3, 2025
How to get rid of strange smells from Gree Slim Duct B?
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  Michael SchwartzSep 3, 2025
  To eliminate strange smells from your Gree Air Conditioner, first identify and remove the source of the odor. Then, clean the filter.
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Katherine KellySep 6, 2025
Why is my Gree Fan not cooling properly?
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  Gabrielle RobertsSep 6, 2025
  If your Gree Fan isn't cooling well, several factors could be at play: * A dirty filter might be restricting airflow. * The room might have too much heat (too many people). * Open doors or windows could be letting heat in. * The inlet and outlet of the indoor unit might be blocked. * The temperature setting could be too high. * The refrigerant level could be low, possibly due to a leak.
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Daniel DunlapSep 9, 2025
Why is my Gree Fan heating poorly?
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  John LambSep 9, 2025
  If your Gree Fan isn't heating effectively, check these potential causes: * A dirty filter can impede performance. * Open doors or windows could be letting heat escape. * The temperature setting might be too low. * Low refrigerant levels, possibly from a leak, could also be the issue.
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qmcclureSep 12, 2025
Why doesn’t the indoor fan of my Gree Fan start up during heating?
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  Douglas WilliamsSep 12, 2025
  If the indoor fan of your Gree Fan doesn't start during heating, here's why: 1. At startup, the indoor unit (IDU) fan will not operate until the heat exchanger (indoor coil) becomes hot to prevent cold air delivery. 2. During Defrost, the IDU fan stops because the system temporarily switches to cooling mode to prevent cold air delivery. The fan will resume operating after defrosting.

The provided document is an Owner's Manual for the GREE Slim Duct B Series Indoor Unit, an air conditioning and heating system designed for residential and commercial applications.

Function Description

The GREE Slim Duct B Series indoor unit is a versatile air conditioning and heating system that provides year-round comfort. It operates in various modes including Cooling, Heating, Dry, Fan Only, and Auto, allowing users to select the most appropriate setting for their needs. The system is designed to be energy-efficient and quiet, with sound pressure levels as low as 25 dB(A).

Key functions include:

Whisper Quiet Operation: Engineered for low noise levels, ensuring a peaceful indoor environment.
Multi Fan Speeds: Offers multiple fan speed options (Auto, Low, Medium Low, Medium, Medium High, High, Turbo) to achieve desired airflow and comfort.
Intelligent Preheating: In heating mode, the system delays the indoor fan operation until the coil has warmed up, preventing the discharge of uncomfortable cool air.
I-FEEL Function: Senses room temperature at the remote controller for more accurate temperature control and personalized comfort.
Turbo Mode: Allows the unit to operate at ultra-high speeds to quickly reach the desired room temperature.
Vacation Mode (Freeze Guard): Sets the unit to 46°F (8°C) in heating mode to prevent freezing when the space is unoccupied.
Timer Mode: Enables programming the unit to turn ON or OFF after a specific time, adjustable from 0.5 to 24 hours.
Sleep Mode: Automatically adjusts room temperature during sleep to enhance comfort and save energy.
Energy Savings Mode: Automatically selects optimal compressor and fan speeds in Cooling or Heating modes to maximize energy efficiency.
Self-Diagnosis: Features a built-in computer for real-time diagnostics, displaying fault codes to facilitate troubleshooting and repair.
Power Failure Mode: Retains user settings and system parameters in non-volatile memory, automatically resuming the last operating mode after a power interruption.
Intelligent Defrost: Monitors the outdoor coil for frost buildup in heating mode and initiates a defrost cycle when necessary, improving efficiency and comfort.
Remote Lock-Out: A security feature on the remote controller to prevent unauthorized access or tampering with settings.
WiFi Function: Allows control of the unit via the "Gree+" APP, enabling remote ON/OFF, mode selection, temperature setting, and fan speed adjustment.

Important Technical Specifications

The manual provides a nomenclature breakdown for the Slim Duct B Series, indicating various model types and their specifications.

Model Examples: DUCT09HP230V1BD, DUCT12HP230V1BD, DUCT18HP230V1BD, DUCT24HP230V1BD.

Series Designation: DUCT (Slim Duct)

Capacity (BTUH):

09: 9,000 BTUH
12: 12,000 BTUH
18: 18,000 BTUH
24: 24,000 BTUH

Model Type: HP (Heat Pump)

Electrical Rating: 230V - 208/230V-1PH-60Hz

Product Type: D (Indoor Slim Duct)

Agency Listings: All systems are listed with AHRI (Air Conditioning, Heating, and Refrigeration Institute) and are ETL certified per UL Standards.

Usage Features

The system can be controlled via a wired controller (XE72) and a remote controller.

Wired Controller (XE72) Features:

ON/OFF: Simple button press to turn the unit on or off.
Mode Setting: Cycles through Auto, Cooling, Dry, Fan, and Heating modes.
Temperature Setting: Adjusts preset temperature from 61°F to 86°F (16°C to 30°C) in 0.5s increments. Unadjustable in Auto mode.
Fan Setting: Cycles through fan speeds (Auto, Low, Medium Low, Medium, Medium High, High, Turbo).
Timer Setting: Programs ON/OFF times from 0.5 to 24 hours.
Swing Setting (Up & Down, Left & Right): Controls the louver movement for air distribution. Can be set to simple swing (continuous movement) or fixed swing (stops at a desired position).
Sleep Setting: Activates or deactivates Sleep mode.
Turbo Setting: Engages Turbo mode for rapid cooling or heating.
Energy Saving Function Setting: Activates an energy-saving mode that automatically adjusts settings for maximum efficiency.
X-fan Setting: After the unit is turned off in Cooling or Dry mode, the indoor fan runs for a few minutes to dry the evaporator and prevent mildew.
Quiet Function Setting: Activates a quiet operation mode.
46°F Vacation Mode Setting: Engages the freeze guard function.
I-Demand Setting: (Cooling mode only) Adjusts temperature and fan speed to lower levels for demand response.
WiFi Function Setting: Resets the WiFi function for APP control.
Lock-out Function: Locks the wired controller to prevent unauthorized changes.
Memory Function: Retains the unit's ON/OFF status and settings after a power failure.
Temperature Sensor Selection: Allows selection of the temperature sensor location (return air inlet or wired controller).
Fan Speed Selection: Offers options for three low levels or three high levels of fan speeds.

Remote Controller Features:

ON/OFF: Turns the unit on or off.
Mode Selection: Selects operation modes (Auto, Cool, Dry, Fan, Heat).
Temperature Adjustment: Increases or decreases the set temperature.
Fan Speed Adjustment: Cycles through fan speeds (Auto, Low, Medium, High).
Swing Control: Adjusts horizontal and vertical louver angles.
Timer ON/OFF: Sets programmed ON/OFF times.
I FEEL: Activates the I-FEEL function, sensing temperature at the remote controller.
LIGHT: Turns the display light on or off.
CLOCK: Sets the current time.
SLEEP: Activates Sleep mode.
TURBO: Activates Turbo mode.
Combination Buttons:
- TEMP + CLOCK: Activates/deactivates Energy-saving function (in COOL mode) or 46°F Vacation mode (in HEAT mode).
- △ + ▽: Activates/deactivates Remote lock-out.
- ▽ + MODE: Switches temperature display between °C and °F (under OFF status).

Maintenance Features

Care and Cleaning:

Safety Precautions: Always turn off the air conditioner and disconnect power before cleaning to prevent electric shock. Do not use water, volatile liquids (gasoline, benzene, thinner), corrosive detergents, or polishing powder for cleaning.
Indoor Unit Surface: Clean the outside panels with warm water.
Air Filter:
- Do not operate the unit without the filter installed.
- Do not remove the air filter except for cleaning, as improper handling can damage it.
- Increase cleaning frequency in highly contaminated rooms (recommended every six months).
- Replace the air filter if dirt becomes impossible to clean.

Troubleshooting: The manual provides a comprehensive troubleshooting guide for common issues, including:

Indoor unit not receiving remote controller signal: Check power, signal range (26 ft), obstacles, remote controller angle, battery power, and for electronic interference.
No air coming from indoor unit: Check for blocked air inlets/outlets, if the unit has reached set temperature (in HEAT mode), or if it's in the preheating phase.
Air conditioner not coming on: Check for power failure, loose wiring, tripped circuit breaker/blown fuse, overheating wiring, or if the unit was recently stopped (wait 3 minutes before restarting).
Mist coming from indoor unit's air outlet: Normal in high temperature and humidity conditions.
Strange smells: Identify and eliminate the odor source, clean the filter.
Inability to adjust "Set" temperature: Check if the desired temperature is within the adjustable range (16°C-30°C or 61°F-86°F).
Insufficient cooling/heating: Check for dirty filter, proper temperature setting, open doors/windows.
Abnormal operation: Disconnect power, then reconnect and restart.
"Water flowing" noise: Normal sound of refrigerant.
Cracking noise: Normal sound due to expansion/contraction of parts from temperature changes.
Air guide louver not closing normally: Disconnect power for 3s, then reconnect. If the problem persists, contact an HVAC technician.

Safety Warnings:

Qualified Personnel: Installation, startup, and servicing should only be performed by qualified installers and service technicians due to high voltage, refrigerant pressures, and moving parts.
Electrical Disconnection: Always disconnect electrical power to indoor and outdoor units before maintenance or cleaning.
No Self-Repair: Do not attempt to repair the system yourself; contact a qualified service technician.
Combustible Materials: Keep combustible materials away from the unit.
Children Supervision: Not intended for use by children without responsible adult supervision.
Emergency Situations: In case of overheating wiring, abnormal sound, frequent circuit breaker trips, burning smell, or unit leakage, turn off the unit and disconnect power immediately, then contact a professional.

Energy Saving Tips: