This document is a service manual for the Gree Cassette B Series multi-zone air conditioning units, providing comprehensive information for installation, service, and troubleshooting.
Function Description:
The Gree Cassette B Series units are designed for multi-zone air conditioning, offering both cooling and heating functionalities. They operate by circulating refrigerant through an indoor unit (evaporator) and an outdoor unit (condenser) to regulate indoor temperature. The indoor unit is a cassette type, designed for ceiling installation, and features a centrifugal fan to distribute conditioned air. The system includes various sensors to monitor ambient and pipe temperatures, ensuring efficient and safe operation. Control is managed via a remote controller, allowing users to select operation modes (Auto, Cool, Dry, Fan, Heat), adjust fan speed, set temperature, and control swing angles of the louvers. Advanced functions like "I FEEL" mode, energy-saving, 8°C heating, child lock, and X-FAN (anti-mold) are also available. The units are designed to operate automatically based on sensed temperatures in Auto mode, and include protection functions for various malfunctions.
Important Technical Specifications:
The manual details specifications for three models: CAS12HP230V1BC, CAS18HP230V1BC, and CAS24HP230V1BC.
- Power Supply: All models operate on 208/230V~, 60Hz, single phase.
- Cooling Capacity:
- CAS12HP230V1BC: 12000 Btu/h
- CAS18HP230V1BC: 14400 Btu/h
- CAS24HP230V1BC: 22800 Btu/h
- Heating Capacity:
- CAS12HP230V1BC: 13000 Btu/h
- CAS18HP230V1BC: 16000 Btu/h
- CAS24HP240V1BC: 27400 Btu/h
- Airflow Volume (H/M/L/SL):
- CAS12HP230V1BC: 330/306/265/- CFM
- CAS18HP230V1BC: 394/347/265/- CFM
- CAS24HP230V1BC: 718/647/518/- CFM
- Dehumidifying Volume: Ranges from 2.96 to 5.28 Pint/h.
- Fan Type: Centrifugal for all models.
- Evaporator Material: Aluminum fin-copper tube.
- Evaporator Pipe Diameter: Φ1/4 inch for all models.
- Fuse Current: 5A for all models.
- Sound Pressure Level (SH/H/M/L/SL): Ranges from 34-44 dB(A) for CAS12HP230V1BC to 36-47 dB(A) for CAS24HP230V1BC.
- Dimensions (LxWxH):
- CAS12HP230V1BC & CAS18HP230V1BC: 23 7/16 x 23 7/16 x 9 7/16 inch
- CAS24HP230V1BC: 33 1/16 x 33 1/16 x 9 7/16 inch
- Net Weight: Ranges from 44.1 lb to 57.33 lb.
- Pipe Connections:
- Liquid pipe: Φ1/4 inch for CAS12HP230V1BC & CAS18HP230V1BC, Φ3/8 inch for CAS24HP230V1BC.
- Gas pipe (to indoor unit): Φ3/8 inch for CAS12HP230V1BC, Φ1/2 inch for CAS18HP230V1BC, Φ5/8 inch for CAS24HP230V1BC.
- Nominal Capacities Conditions: Based on specific indoor and outdoor temperatures for cooling and heating modes, and a piping length of 3/16 inch.
Usage Features:
- Remote Controller (YAP1FFB): A general-use remote controller with buttons for ON/OFF, MODE, FAN, TURBO, temperature adjustment (▲/▼), swing control (horizontal and vertical), I FEEL, T-ON/T-OFF, CLOCK, X-FAN, LIGHT, and TEMP display.
- Operation Modes: Auto, Cool, Dry, Fan, Heat.
- Temperature Setting Range: 61-86°F (16-30°C).
- Fan Speed: Auto, Low, Medium, High.
- Swing Function: Horizontal and vertical louver swing for optimal air distribution.
- I FEEL Function: The remote controller detects ambient temperature and sends it to the unit, which adjusts the indoor temperature accordingly.
- Timer Functions: T-ON (timer on) and T-OFF (timer off) for scheduled operation.
- SLEEP Function: Automatically adjusts set temperature for comfortable sleep.
- X-FAN Function: Continues indoor fan operation for a few minutes after shutdown in COOL or DRY mode to dry the evaporator and prevent mold.
- LIGHT Function: Controls the display light on the indoor unit.
- TEMP Button: Cycles through displaying set temperature, indoor ambient temperature, or outdoor ambient temperature on the indoor unit's display.
- Combination Buttons:
- Energy-saving: TEMP + CLOCK buttons in cooling mode.
- 8°C Heating: TEMP + CLOCK buttons in heating mode.
- Child Lock: ▲ + ▼ buttons.
- Temperature Display Switchover: ▼ + MODE buttons in OFF status to switch between °C and °F.
- WIFI Function: MODE + TURBO buttons to enable/disable Wi-Fi connectivity.
- Display Indicators: The indoor unit features a dual-8 nixie tube display for set temperature, error codes, and various indicators (Power, Timer, Auto).
Maintenance Features:
- Error Code List: Provides a list of error codes (e.g., E6 for communication malfunction, H6 for fan motor no feedback, F1/F2 for temperature sensor issues, C5 for jumper cap malfunction, F0 for insufficient fluorine protection, E9 for full water protection) and their corresponding AC status and malfunctions.
- Troubleshooting Flowcharts: Detailed flowcharts guide technicians through diagnosing and resolving common malfunctions, including:
- Temperature sensor (F1, F2) issues: Checking wiring, short circuits, sensor integrity, and mainboard.
- IDU Fan Motor Blocked Protection (H6): Checking fan blade movement, wiring, and motor interface voltages.
- Jumper Cap Protection (C5): Verifying jumper cap presence, insertion, and integrity.
- Communication Malfunction (E6): Checking wiring connections, mainboard compatibility, and communication cord.
- Insufficient Fluorine Protection (F0): Checking heat exchangers, compressor operation, system blockages, and refrigerant leaks.
- Full Water Protection (E9): Checking water pump and full water switch.
- Maintenance Method for Normal Malfunction: A table outlining possible causes, discriminating methods, and troubleshooting steps for issues like "Air Conditioner Can't be Started Up," "Poor Cooling (Heating)," "Horizontal Louver Can't Swing," "ODU Fan Motor Can't Operate," "Compressor Can't Operate," "Air Conditioner is Leaking," and "Abnormal Sound and Vibration."
- Exploded View and Parts List: Detailed diagrams and lists of components for each model (CAS12HP230V1BC, CAS18HP230V1BC, CAS24HP230V1BC) to aid in part identification and replacement.
- Removal Procedure: Step-by-step instructions for disassembling key components such as the water tray, centrifugal fan, and motor, including warnings about power discharge and refrigerant handling.
- Reference Sheets: Includes conversion tables for Celsius and Fahrenheit, configuration details for connection pipes (standard lengths, additional refrigerant charging), pipe expanding methods, and resistance lists for ambient and tube temperature sensors (15K and 20K) and discharge temperature sensor (50K) to assist in accurate measurements and diagnostics.
- Safety Precautions: Emphasizes critical safety measures for installation and maintenance, including electrical safety (power disconnection, proper wiring, grounding), installation safety (unit weight, fixing bolts, foreign objects), and refrigerant safety (avoiding contact with fire, using specified refrigerant, leak checks).
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