This document is a service manual for Hisense Smart DC Inverter Split Type Air Conditioners, covering models AS-07UR4SYDDB15, AS-09UR4SYDDB15, AS-11UR4SYDDB15, AS-13UR4SVDDB5, AS-18UR4SUADB5, and AS-24UR4SFBDB5. The manual provides essential information for installation, operation, and troubleshooting of these units.
Function Description
The Hisense Smart DC Inverter Air Conditioners are split-type units designed for both cooling and heating, utilizing R410A refrigerant. These systems incorporate inverter technology for efficient operation and precise temperature control. Key functions include:
- Cooling and Heating: The units provide a wide operating range for both cooling (18~46°C) and heating (-15~24°C).
- Dehumidifying Mode: This mode operates at varying frequencies (30-60Hz) based on the temperature difference between indoor ambient and set temperatures, to effectively remove moisture from the air.
- Fan Only Mode: In this mode, the compressor and outdoor fan stop, while the indoor fan operates at a pre-set air volume, with louver swing.
- Anti-cold Air System: During heating mode, the indoor fan motor operation is regulated to prevent cold air from being discharged, ensuring comfort.
- Air Flow Direction Control: The horizontal louver is controlled by a step motor, allowing for automatic swing or manual adjustment.
- Smart Function and Super Function: These features enhance user convenience and performance, with the Super function providing rapid cooling at 16°C with highest fan speed and compressor frequency for 15 minutes.
- Sleep Operation: Designed for quiet operation and energy saving during sleep.
- 24 Hours Timer: Allows users to program the unit to turn on or off at specific times.
- Auto Restart: The unit automatically restarts with previous settings after a power outage.
- Dimmer: Adjusts the brightness of the display panel.
- Self-diagnosis and Error Code Display: The system can detect and display error codes on the indoor unit's 7-segment tube and LEDs, aiding in troubleshooting.
Important Technical Specifications
The manual details specifications for various models, including:
General Specifications (Example for AS-07UR4SYDDB15):
- Type: T1, H/P, INVERTER
- Energy Class: A (Cooling & Heating)
- Refrigerant: R410A
- Refrigerant Charge Volume (5M): 480g
- Additional Ref. Volume: 20g
- Power Supply: 220-240V~, 50Hz, 1P
- Compressor Type: Rotary (e.g., GS089MBB by LG)
- Expansion Device: Capillary
- Evaporator/Condenser: Copper tube and Aluminum Fin
- Connecting Pipe Diameter: Liquid Pipe 1/4 inch, Gas Pipe 3/8 inch
- Cooling/Heating Setting Temperature Range: 16~30°C
- Cooling Operating Temperature Range: 18~46°C
- Heating Operating Temperature Range: -15~24°C
Performance (Example for AS-07UR4SYDDB15):
- Cooling Capacity: 2.10 kW (0.90-2.50)
- Heating Capacity: 2.15 kW (0.90-2.50)
- Rated Input-Cooling: 0.650 kW (0.28-0.80)
- Rated Input-Heating: 0.590 kW (0.23-0.80)
- Moisture Removal: 0.5 L/h
- Air Circulation (High/Mid/Low): 550/460/400 m³/h
- EER for Cooling: 3.23 W/W
- COP for Heating: 3.64 W/W
- Rated Current (Cooling/Heating): 3.0A/2.7A
- Max Suction Pressure: 1.6 MPa
- Max Discharge Pressure: 4.15 MPa
Noise Levels (Example for AS-07UR4SYDDB15):
- Indoor Unit Noise Level (High/Mid/Low): 38/33.5/29.5 dB(A)
- Outdoor Unit Noise Level: 51 dB(A)
Dimensions & Weight (Example for AS-07UR4SYDDB15):
- Indoor Unit Net Dimensions (WxHxD): 765×280×220 mm
- Outdoor Unit Net Dimensions (WxHxD): 660×483×240 mm
- Indoor Unit Net Weight: 7 Kg
- Outdoor Unit Net Weight: 23 Kg
Wiring Recommendations:
- 5K~12K Capacity: 1.0mm² (Power wire), 1.0mm² (Connect wire). Fuse/Circuit Breaker: 3.15A (indoor), 15A (outdoor).
- 18K Capacity: 2.5mm² (Power wire), 1.5mm² (Connect wire). Fuse/Circuit Breaker: 3.15A (indoor), 20A (outdoor).
- 22K~30K Capacity: 2.5mm² (Power wire), 2.5mm² (Connect wire). Fuse/Circuit Breaker: 3.15A (indoor), 30A (outdoor).
Usage Features
- Remote Controller: The units are operated via an LCD wireless remote controller, offering various settings like mode selection, fan speed, timer, sleep, quiet, dimmer, and economy functions.
- Front Panel Display: An LED display on the front panel shows the set temperature or indoor temperature, and fault codes.
- Removable and Washable Panel/Filter: Facilitates easy cleaning and maintenance.
- 5 Speed and Auto Indoor Fan Control: Provides flexibility in fan speed settings.
- Vertical Auto Swing Louver and Manual Adjustable Horizontal Swing Louver: Allows for precise control over airflow direction.
- Emergency Switch: In case of remote control malfunction, an emergency switch allows basic operation (cooling mode, high-speed indoor fan).
- I Feel Function: When activated, the room temperature is sensed by the remote control, allowing for more accurate temperature regulation based on the user's immediate vicinity.
Maintenance Features
- Error Code Table: Comprehensive tables list error codes, their display patterns (LEDs and 7-segment tube), and potential root causes, aiding in quick diagnosis.
- Trouble Diagnosis of Protection: Detailed explanations of various protection mechanisms (e.g., over-voltage, over-current, anti-freezing, compressor exhaust temperature protection) and their conditions for activation and release.
- Test the Jumper Terminals: A method to bypass communication failures by short-circuiting specific terminals on the outdoor control panel, forcing the outdoor unit to run independently for diagnostic purposes.
- Compressor Diagnosis: Instructions for testing compressor winding resistance and identifying common compressor faults (motor lock, discharge pressure issues, winding abnormality).
- Electric Filter Board Diagnosis: Visual examination and voltage testing procedures for the electric filter board.
- Electric Communication Diagnosis: A step-by-step guide to check wiring, connections, and voltage fluctuations between indoor and outdoor units to diagnose communication issues.
- Temperature Sensor Parameter Tables: Detailed resistance and voltage values for indoor coil, indoor room, outdoor coil, and outdoor sensors at different temperatures, crucial for sensor troubleshooting.
- Print Circuit Board Diagrams: Visual representations of indoor and outdoor unit PCBs, indicating key components and connection points for easier identification and repair.
- Refrigerant Flow System Diagrams: Illustrations of the refrigerant flow in both cooling and heating modes, useful for understanding system operation and diagnosing issues related to refrigerant circuit.
- Safety Considerations: Emphasizes the importance of reading instructions, following electrical codes, proper handling during transport, secure installation, and safety precautions during servicing to prevent injury or damage.
- Air Purging and Leakage Test: Step-by-step instructions for connecting charging hoses, evacuating the system, checking for leaks, and performing a test run after installation.
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