This document is an installation manual for a Samsung air conditioner, model AC*NXSC. It provides detailed instructions and safety precautions for the proper installation, operation, and maintenance of the unit.
Function Description
The Samsung air conditioner is designed to provide cooling and heating for indoor spaces. It operates as a split system, consisting of an indoor unit and an outdoor unit. The system uses R-410A refrigerant. The manual emphasizes that the air conditioner should only be used for its intended applications and is not suitable for installation in areas like laundries.
Important Technical Specifications
Refrigerant: The air conditioner uses R-410A refrigerant.
Power Supply:
- 1-phase models: 220-240V~, 50Hz, with a voltage range of 198-264V.
- 3-phase models: 380-415V, 50Hz, with a voltage range of 342-457V.
- Maximum allowable voltage variation between phases is 2%.
Outdoor Unit Dimensions (Unit: mm):
- A Type (AC052NX*SEC): 880 (W) x 638 (H) x 310 (D)
- B Type (AC071NX*SEC): 880 (W) x 793 (H) x 310 (D)
- C Type (AC090NX*SEC): 880 (W) x 967 (H) x 320 (D)
- D Type (AC100NXSGC / AC120NXSGC / AC140NX*SGC / AC160NXMSGC): 932 (W) x 1162 (H) x 375 (D)
Pipe Length or Height:
- AC052NXSEC / AC071NXSEC: Max. allowable length 30m or less, allowable height length 15m or less.
- AC090NXSEC / AC100NXSGC / AC120NXSGC / AC140NXSGC / AC160NXMSGC: Max. allowable length 50m or less, allowable height length 30m or less.
Refrigerant Pipe Specifications:
- Outer Diameter (D) [mm] / Minimum thickness [mm] / Temper grade:
- Ø6.35 / 0.7 / C1220T-O
- Ø9.52 / 0.7 / C1220T-O
- Ø12.70 / 0.8 / C1220T-O
- Ø15.88 / 1.0 / C1220T-O
- Ø15.88 / 0.8 / C1220T-1/2H OR C1220T-H
- Ø19.05 / 0.9 / C1220T-1/2H OR C1220T-H
- Ø22.23 / 0.9 / C1220T-1/2H OR C1220T-H
- For pipes larger than Ø19.05mm, C1220T-1/2H (Semi-hard) pipe is recommended to prevent breakage.
Adding Refrigerant Quantity:
- AC052NXSEC / AC071NXSEC: +10g/m over 5m interconnection pipe length.
- AC090NX*SGC: +15g/m over 5m interconnection pipe length.
- AC100NXSGC / AC120NXSGC / AC140NX*SGC / AC160NXMSGC: +20g/m over 5m interconnection pipe length.
Electrical Connections:
- Indoor Power Supply: 1.5mm², 3 wires.
- Communication Cable: 0.75-1.5mm², 2 wires.
- Home Server Cable: 0.75mm², 2 wires.
- Power supply cords should be polychloroprene sheathed flexible cord (IEC:60245 IEC 57 / CENELEC: H05RN-F or IEC:60245 IEC 66 / CENELEC: H07RN-F).
- For computer or network rooms, use double shielded (Tape aluminum / polyester braid + copper) FROHH2R type cable.
Tightening Torques:
- Flare nut (Nm):
- Ø6.35 mm (1/4"): 14~18
- Ø9.52 mm (3/8"): 34~42
- Ø12.70 mm (1/2"): 49~61
- Ø15.88 mm (5/8"): 68~82
- Ø19.05 mm (3/4"): 100~120
- Terminal board screws (kgf·cm):
- M3: 5.0~6.0
- M4: 12.0~15.0
- M5: 20.0~25.0
- Stop valve body cap (N·m):
- Ø6.35: 20~25
- Ø9.52: 20~25
- Ø12.70: 25~30
- Ø15.88: 30~35
- Over Ø19.05: 35~40
- Charging port cap (N·m): 10~12
Usage Features
Installation Location:
- Outdoor Unit: Must be installed on a rigid, stable, flat surface, not on its side or upside down. It should be in a dry, sunny location, not exposed to direct sunlight or strong winds. Sufficient clearance (e.g., 300mm from stereo systems, 200mm from air guide duct) is required. If installed near the seashore, a protection wall (1.5 times larger than the unit, 700mm clearance for ventilation) is recommended to block sea breeze.
- Indoor Unit: Not suitable for laundry areas.
Safety Precautions:
- Always disconnect power before servicing.
- Installation and testing must be performed by qualified personnel.
- Do not install in easily accessible areas.
- Ensure proper grounding connection.
- Verify power supply voltage and frequency comply with specifications.
- Use suitably dimensioned cut-off and protection switches.
- Do not modify power cables, use extension wiring, or multiple wire connections.
- Do not attempt to repair, move, alter, or reinstall the unit if unauthorized.
- Do not place containers with liquids or other objects on the unit.
- Avoid environments with hazardous substances or free flames.
- Units must be installed with accessibility for maintenance and repairs.
Refrigerant Handling:
- The air conditioner contains refrigerant that must be disposed of as special waste at authorized centers.
- Air in refrigeration pipes must be purged to prevent compressor damage and malfunction.
- Refrigerant for air purging is not charged in the outdoor unit; a vacuum pump must be used.
Testing Operations:
- After installation, check power supply, indoor unit connections (power, communication, thermistor sensor, drain pump/hose, display), and outdoor unit PCB buttons.
- Use the K2 button on the outdoor unit PCB to run and stop the test mode.
- The K3 button can be pressed for over 1 second to reset the power supply of the outdoor unit.
- A "View Mode" (accessed via K4 switch) provides system state information, including order frequency, current frequency, number of indoor units, sensor temperatures (outdoor air intake, discharge, Eva-In, Cond), current, fan RPM, target discharge temperature, EEV, capacity sum, protective control status, heat radiating plate temperature, and S/W check.
Maintenance Features
Regular Inspections:
- Regularly inspect the unit, electrical connections, refrigerant tubes, and protections. These operations should be performed by qualified personnel only.
- If installed near the seashore, clean the outdoor unit heat exchanger and spread corrosion inhibitor at least once a year.
- Check product condition periodically (every 3 months) and perform anti-corrosion treatment (e.g., R-Pro supplied by Samsung or commercial water repellent grease and wax).
Grounding:
- Ensure correct grounding according to specifications, using a suitable grounding electrode.
- The grounding wire for the telephone line cannot be used.
- Measure grounding resistance with a ground resistance tester.
Pump Down Procedure:
- This procedure is used to collect all system refrigerant in the outdoor unit when replacing an evaporator or relocating the unit.
- It involves running the system in cooling mode, closing high and low-pressure valves sequentially, and then stopping the air conditioner before disconnecting pipes.
Troubleshooting:
- The manual includes a "Troubleshooting" section with display codes and explanations for various errors, such as:
- Compressor errors (freezing, overload, discharge temperature protection).
- Power source errors (3-phase miss wiring).
- Outdoor unit operation temperature range errors.
- Condenser temperature sensor control errors.
- Low pressure switch errors.
- Fan errors (outdoor/indoor unit).
- Sensor errors (outdoor temperature, condenser, discharge temperature, indoor unit temperature, heat exchanger input/output).
- Floating switch errors (indoor unit).
- Indoor terminal block thermal fuse errors.
- Electronic expansion valve errors.
- Indoor unit address overlap errors.
- Communication errors (system down, indoor/outdoor, wired remote controller).
- Wired remote controller option setting errors.
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