TECHNICAL & SERVICE MANUAL Indoor Unit FCR518/522CL AWR518/522CL Outdoor Unit AER518SC3 AER518SCL3 AER522SC3 AER522SCL3 SPLIT SYSTEM AIR CONDITIONER AER518SC3 AER518SCL3 FCR518/522CL AER522SC3 AER522SCL3 AWR518/522CL 0.8180.143.
When Transporting Important! Please Read Before Starting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.
Table of Contents Page 1 1 OPERATING RANGE 2 SPECIFICATIONS 2-1 Unit Specification 2-2 Major Components Specifications 2-3 Other Component Specifications 2 10 16 3 DIMENSIONAL DATA 22 4 REFRIGERANT FLOW DIAGRAM 26 5 PERFORMANCE DATA 5-1 Air Throw Distance Chart 5-2 Cooling Capacity 28 31 ELECTRICAL DATA 6-1 Electrical Characteristic 6-2 Electric Wiring Diagrams 37 41 INSTALLATION INSTRUCTION 7-1 Installation Site Selection 7-2 Remote Control Unit Installation P osition 7-3 Recommended Wire
11-3 Checking Motor Capacitor 12 DISASSEMBLY PROCEDURE FOR INDOOR UNIT 12-1 Removing air intake grille 12-2 Removing side panels 12-3 Access and removal of electrical component box 12-4 Removing flap motor 12-5 Removing evaporator 12-6 Removing fan and fan motor 72 73 74 74 75 75 77
1. OPERATING RANGE Temperature Cooling Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 32°C D.B. / 23°C W.B. 43°C D.B. Minimum 19°C D.B. / 14°C W.B. 19°C D.B.(*) (*) SCL Models : -15°C D.B.
2. SPECIFICATIONS 2-1. Unit Specifications Indoor Unit Outdoor Unit AWR518CL AER518SC3 Power Surce.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit V 230 V 50 Hz Cooling kW Capacity 5.1 BTU/h 17400 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 760 2.3 342 to 418 Running amperes A 3.7 Power input W 2100 Power factor C.O.P. Compressor locked rotor amperes % 82 W/W 2.4 A 21.
Indoor Unit Outdoor Unit AWR522CL AER522SC3 Power Source..... Voltage Rating 400V - 3N - 50Hz........ 400 V Electrical Rating Performance Control Circuit 230 V 50 Hz Cooling Capacity kW 6.15 BTU/h 21000 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 830 3.3 342 to 418 Running amperes A 4.8 Power input W 2800 Power factor % C.O.P. 84 W/W Compressor locked rotor amperes 2.20 A 28 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit AWR518CL AER518SCL3 Power Source.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit V 230 V 50 Hz Cooling kW Capacity 5.0 BTU/h 17100 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 760 2.3 342 to 418 Running amperes A 3.6 Power input W 2000 Power factor C.O.P. Compressor locked rotor amperes % 80 W/W 2.5 A 21.5 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit AWR522CL AER522SCL3 Power Source..... Voltage Rating 400V - 3N - 50Hz........ 400 V Electrical Rating Performance Control Circuit 230 V 50 Hz Cooling Capacity kW 6.15 BTU/h 21000 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 830 3.3 342 to 418 Running amperes A 4.8 Power input W 2800 Power factor % C.O.P. 84 W/W Compressor locked rotor amperes 2.20 A 28 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit FCR518CL AER518SC3 Power Surce.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit 230 V 50Hz Cooling kW Capacity 5.0 BTU/h 17100 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 800 2.3 342 to 418 Running amperes A 3.6 Power input W 2000 Power factor % C.O.P. 80 W/W 2.50 Compressor locked rotor amperes 21.5 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit FCR522CL AER522SC3 Power Surce.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit V 230 50Hz Cooling Capacity kW 6.15 BTU/h 21000 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 900 3.3 342 to 418 Running amperes A 4.8 Power input W 2800 Power factor C.O.P. Compressor locked rotor amperes % 84 W/W 2.2 A 28 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit FCR518CL AER518SCL3 Power Surce.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit 230 V 50Hz Cooling kW Capacity 5.0 BTU/h 17100 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 800 2.3 342 to 418 Running amperes A 3.6 Power input W 2000 Power factor % C.O.P. 80 W/W 2.50 Compressor locked rotor amperes 21.5 Controls / Temperature control Microprocessor / I.C.
Indoor Unit Outdoor Unit FCR522CL AER522SCL3 Power Source.......Voltage Rating 400V - 3N - 50Hz .. ....400 V Electrical Rating Performance Control Circuit V 230 50Hz Cooling Capacity kW 6.15 BTU/h 21000 m3/h Air circulation (High) Moisture removal (High) Liters/h Available voltage range V 900 3.3 342 to 418 Running amperes A 4.8 Power input W 2800 Power factor % C.O.P. 84 W/W Compressor locked rotor amperes 2.20 A 28 Controls / Temperature control Microprocessor / I.C.
2-2. Major Component Specifications 2-2-1. Indoor Unit Controller PCB Indoor Unit AWR518CL Part No. POW – K188E Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8PS3E Type Cross-flow Q´ty ... Dia. and length mm 1 ... ø88 / L746 Fan motor model ... Q´ty UF2– 31A5PA– S ... 1 Fan & Fan Motor No. of poles ... rpm (High) 2 ... 1,305 Nominal output W 30 Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 130.4 WHT – PNK : 169.
Circuit Board Ass´y Indoor Unit AWR522CL Part No. POW – K228E Controls Microprocessor Control circuit fuse 250 V – 3.15 A Remote Control Unit RCS – 8PS3E Type Cross-flow Q´ty ... Dia. and length mm 1 ... ø88 / L746 Fan motor model ... Q´ty UF2– 31A5PA– S ... 1 Fan & Fan Motor No. of poles ... rpm (High) 2 ... 1,380 Nominal output W 30 Coil resistance (Ambient temp. 20°C) Ω WHT – BRN : 130.4 WHT – PNK : 169.8 Safety devices Type Operating temp.
Controller PCB Indoor Unit FCR518CL Part No. POW–K185GS–N Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 5PN3E Type Centrifugal Number ... Dia. and length mm 2 ... ø 130 / L 180 Fan motor model ... Number K48410–M01417 ... 1 Fan & Fan Motor No. of poles ... rpm (230 V, High) 4 ... 1,140 Nominal output W Coil resistance (Ambient temp. 20°C) Ω WHT – VLT : 87 ± 7% VLT – YEL : 87 ± 7% WHT – PNK : 273 ± 7% Safety devices Type Operating temp.
Controller PCB Indoor Unit FCR522CL Part No. POW–K185GS–N Controls Microprocessor Control circuit fuse 250 V – 3 A Remote Control Unit RCS – 5PN3E Type Centrifugal Number ... Dia. and length mm 2 ... ø 130 / L 180 Fan motor model ... Number K48410–M01418 ... 1 Fan & Fan Motor No. of poles ... rpm (230 V, High) 4 ... 1,280 Nominal output W Coil resistance (Ambient temp. 20°C) Ω WHT – VLT : 73 ± 7% VLT – YEL : 73 ± 7% WHT – PNK : 207 ± 7% Safety devices Type Operating temp.
2-2-2. Outdoor Unit Outdoor Unit Controller PCB AER518SC3 / AER518SCL3 Part No. POW-C181BL (Only CLR model) Control circuit fuse 250V – 5A Type Rotary (Hermetic) Compressor model C-2RN173H8W 80807088 380 – 400 V – 3N ~ 50 Hz Source Nominal output W 1,700 Compressor oil ... Amount cc FV68S ... 800 Coil resistance (Ambient temp. 25°C) Ω C – R : 6.369 Compressor C – S : 6.073 R – S : 6.217 Type Safety devices Internal protector Overload relay Operating temp.
Outdoor Unit AER522SC / AER522SCL3 Controller PCB Part No. Johnson Control (Only CLR model) Type Rotary (Hermetic) Compressor model C-RN223H8A 80244088B 380 – 400 V – 3N ~ 50 Hz Source Nominal output W 2200 Compressor oil ... Amount cc FV68S ... 1350 Coil resistance (Ambient temp. 25°C) Ω C – R : 4.97 Compressor C – S : 4.64 R – S : 4.88 Type Safety devices Internal protector Overload relay Operating temp.
2-3. Other Component Specifications Indoor Unit AWR518CL AWR522CL Transformer (TR) Rating ATR-J105 Primary AC 230V, 50 / 60 Hz Secondary 19V, 0.526A Capacity Coil resistance 10VA Ω (at 21°C) Primary (WHT – WHT): 205 ± 10% Secondary (BRN – BRN): 2.0 ± 10% Thermal cut-off temp. 150°C Thermistor (Coil sensor) Resistance DTN-TKS131B kΩ 0°C Thermistor (Room sensor) Resistance 15.0 ± 2% DTN-TKS142B kΩ 25°C 16 5.
Indoor Unit FCR518CL FCR522CL Thermistor (Room sensor TH2) Resistance KTEC-35-S6 kΩ 10°C 10.0 ± 4% 30°C 4.0 ± 4% 15°C 7.9 ± 4% 35°C 3.3 ± 4% 20°C 6.3 ± 4% 40°C 2.7 ± 4% 25°C 5.0 ± 4% 50°C 1.8 ± 4% Thermistor (Coil sensor TH1) Resistance PBC-41E-S14 kΩ –20°C 40.1 ± 5% –10°C 24.4 ± 5% 30°C 4.4 ± 5% 0°C 15.3 ± 5% 40°C 3.0 ± 5% 10°C Transformer (TR) Rating 9.9 ± 5% 50°C 2.1 ± 5% ATR-H85 Primary AC 230V, 50/60Hz Secondary 11V, 0.727A Capacity Coil resistance 20°C 6.
Outdoor Unit AER518SC3 Thermostat (Fann speed Control 23S) Switching temp. MQT5S-27YZJ °C high → LOW 23.5°C + 0 / - 2.
Outdoor Unit AER518SCL3 Thermistor (Coil sensor TH3 / Air sensor TH4) Resistance PBC-41E-S4 / PBC-41E-S8 kΩ –20°C 40.1 ± 5% –10°C 24.4 ± 5% 30°C 4.4 ± 5% 0°C 15.3 ± 5% 40°C 3.0 ± 5% 10°C Solid State Relay (SSR) 20°C 6.5 ± 5% 9.9 ± 5% 50°C 2.1 ± 5% G3L-205TL-TS1 Input Rated voltage DC 12V Control voltage range DC 0V to 6.
Outdoor Unit AER522SC3 Electro Magnetic Contactor (MG) HE-10TB TH-7A Magnetic Contactor Coil rating Coil resistance AC 220–240V, 50Hz / AC 240–260V, 60Hz Ω (at 25°C) 1,260 ± 10% Contact rating (Main) AC 440V, 8A TH-7A Thermal relay (Overcurrent relay) Operating amperes 7A Negative Phase Relay (47C) RDR-S400 Rating AC 415V, 3-phase 50Hz Contact rating AC 400V, 1A Operation Positive phase: ON Negative phase: OFF YTB-S383 Thermostat (Fan Speed Control 23S) Switching temp.
Outdoor Unit AER522SCL3 Electro Magnetic Contactor (MG) HE-10TB TH-7A Magnetic Contactor Coil rating Coil resistance AC 220–240V, 50Hz / AC 240–260V, 60Hz Ω (at 25°C) 1,260 ± 10% Contact rating (Main) AC 440V, 8A Thermal relay (Overcurrent relay) Operating amperes 7A Negative Phase Relay (47C) RDR-S400 Rating AC 415V, 3-phase 50Hz Contact rating AC 400V, 1A Operation Positive phase: ON Negative phase: OFF YTB-S383 Thermostat (Fan Speed Control 23S) Switching temp. °C high → LOW 28.
3. DIMENSIONAL DATA Indoor Unit AWR518CL AWR522CL 285 995 206 (3) 45 45 172.5 Remote control unit 147.5 147.5 Center of tubing hole (2 places) 61 18.5 Drain hose ø18 Narrow tube ø6.35 (1/4") Wide tube ø12.7 (1/2") -------- - -KR188E Wide tube ø15.
Indoor Unit FCR518CL FCR522CL 190 86 86 680 900 74 Center of tubing hole ø75 (4 places) Wide tube ø12.7 (1/2") Wide tube ø15.88 (5/8") FCR518CL FCR522CL 172.5 74 Narrow tube ø6.35 (1/4") Drain hose ø26 18.
AER518SC3 AER518SCL3 538 146 337 307 Air intake 4 – ø12 holes Air discharge Wide tube service valve ø12.7 (1/2") Narrow tube service valve ø6.
Outdoor Unit AER522SC3 AER522SCL3 Air intake 325 20 20 Air discharge 130 620 100 55 Wide tube service valve ø15.88 (5/8") Narrow tube service valve ø6.35 (1/4") 6 – ø3.1 holes 285 86 73 229 57 835 560 250 Check port ø6.
4. REFRIGERANT FLOW DIAGRAM Indoor Unit AWR518CL FCR518CL Outdoor Unit Indoor Unit Indoor Unit AER518SC3 Outdoor Unit Outdoor Unit AWR522CL FCR522CL Indoor Unit AER522SC3 Outdoor Unit Wide tube Wide tube service valve Muffler Accumulator O.D. ø15.88 mm (5/8 ") Compressor Evaporator Condenser Capillary for liquid injection Narrow tube Narrow tube service valve O.D. ø6.
Indoor Unit AWR518CL FCR518CL Outdoor Unit Indoor Unit AER518SCL3 Outdoor Unit Muffler Outdoor Unit Indoor Unit AWR522CL FCR522CL Indoor Unit AER522SCL3 Outdoor Unit Wide tube Wide tube service valve O.D. ø15.88 mm (5/8 ") Muffler Accumulator Compressor Evaporator Condenser Capillary for liquid injection Narrow tube Narrow tube service valve O.D. ø6.
5. PERFORMANCE DATA 5-1. Air Throw Distance Chart Indoor Unit AWR518CL Room air temp. : Fan speed : 27°C High Horizontal distance (m) 0 1 2 3 4 5 6 7 8 9 8 9 Axis air velocity (m/s) Vertical distance (m) 0 1 2 3 4 : Flap angle 0° , : Flap angle 30°, : Axis air velocity 0° : Axis air velocity 30° Heating AWR522CL Room air temp.
AIR FLOW CHART FCR518CL Room air temp.
FCR522CL Room air temp.
5-2. Coolling capacity INDOOR UNIT: OUTDOOR UNIT: AWR518CL AER518SC3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 5 kW 760 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP.
Indoor Unit Outdoor Unit AWR518CL AER518SCL3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 TC: 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 5 kW 760 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP. 25 30 35 4.74 4.60 4.38 1.65 1.76 1.89 3.25 3.18 3.08 3.68 3.61 3.50 4.10 4.02 3.91 4.54 4.
INDOOR UNIT: OUTDOOR UNIT: AWR522CL AER522SC3 / AER522SCL3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 6,15 kW 830 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP.
INDOOR UNIT: OUTDOOR UNIT: FCR518CL AER518SC3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 5.1 kW 800 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP.
INDOOR UNIT: OUTDOOR UNIT: FCR518CL AER518SCL3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 5 kW 800 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP.
INDOOR UNIT: OUTDOOR UNIT: FCR522CL AER522SC3 / AER522ACL3 400V 50 Hz RATING CAPACITY AIR FLOW RATE EVAPORATOR ENT.TEMP. °C W.B. D.B. 15 17 19 21 23 21 23 25 27 29 31 21 23 25 27 29 31 21 23 25 27 29 31 23 25 27 29 31 25 27 29 31 6,15 kW 900 m³/h TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC SHC TC CM SHC SHC SHC SHC CONDENSER OUTDOOR AMBIENT TEMP.
6. ELECTRICAL DATA 6-1. Electrical Characteristics Indoor Unit Outdoor Unit AWR518CL AER518SC3 Indoor Unit Outdoor Unit Fan Motor Performance at Rating Conditions Running Amps. Power Input Full Load Conditions Running Amps. Power Input A kW A kW Fan Motor 230 V 50 Hz 0.30 0,071 0.40 Complete Unit Compressor 400 V - 3N - 50Hz 3.17 3.6 0,086 1,98 2,0 0.37 0.50 3.7 4.1 0,070 0,093 2,30 2,40 Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B. Outdoor Air Temperature 35°C D.
Indoor Unit Outdoor Unit AWR518CL AER518SCL3 Indoor Unit Outdoor Unit Fan Motor Performance at Rating Conditions Running Amps. Power Input Full Load Conditions Running Amps. Power Input A kW A kW Fan Motor 230 V 50 Hz 0.37 0,070 0.50 Complete Unit Compressor 400 V - 3N - 50Hz 2.97 3.6 0,093 1,85 2,0 0.37 0.50 3.7 4.1 0,070 0,093 2,30 2,40 Rating Conditions : Indoor Air Temperature 27°C D.B. / 19°C W.B. Outdoor Air Temperature 35°C D.B.
Indoor Unit FCR518CL Outdoor Unit AER518SC3 Indoor Unit Outdoor Unit Complete Unit Fan Motor Performance at Fan Motor Compressor 230 V ~ 50Hz Running Amps. 400 V – 3N ~ 50Hz A 0.28 0.40 3.15 3.6 kW 0.072 0.086 A 0.33 0.40 3.37 4.1 kW 0.071 0.082 2.247 2.4 Rating Conditions Power Input Running Amps. 1.98 2.
Indoor Unit FCR518CL Outdoor Unit AER518SCL3 Indoor Unit Outdoor Unit Complete Unit Fan Motor Performance at Fan Motor Compressor 230 V ~ 50Hz Running Amps. 400 V – 3N ~ 50Hz A 0.33 0.40 2.9 3.6 kW 0.071 0.082 1.847 2.0 A 0.33 0.40 3.37 4.1 kW 0.071 0.082 2.247 2.4 Rating Conditions Power Input Running Amps.
6-2 Electric Wiring Diagrams Indoor Unit FCR518CL FCR522CL WARNING 41 To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts
Indoor Unit AWR518CL AWR522CL 42
WARNING Outdoor Unit AER518SC3 AER522SC3 43 To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts
WARNING Outdoor Unit AER518SCL3 AER522SCL3 44 To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts
, 7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection Indoor Unit WARNING To prevent abnormal heat generation and the possibility of fire, don’t place obstacles, enclosures and grills in front of or surrounding the air conditioner in a way that may block air flow. AVOID: ● direct sunlight. 15 cm min. INDOOR UNIT Front View Fig.1 ● nearby heat sources that may affect performance of the unit. INDOOR UNIT ● areas where leakage of flammable gas may be expected.
Outdoor Unit AVOID: ● heat sources, exhaust fans, etc. (Fig. 3) ● damp, humid or uneven locations. Exhaust fan Hot air Heat source DO: ● choose a place as cool as possible. Outdoor unit ● choose a place that is well ventilated. ● allow enough room around the unit for air intake/exhaust and possible maintenance. (Figs. 4a to 4c) Fig. 3 Fig.
7-2. Remote Control Unit Installation Position Removable mounting Wall The remote control unit can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places: Special mounting screw ● In direct sunlight ● Behind a curtain or other place where it is covered ● More than 8 m away from the air conditioner ● In the path of the air conditioner's airstream Fig.
7-3. Recommended Wire Length and Size Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. NOTE Refer to the WIRING SYSTEM DIAGRAM for the meaning of "A" and "B" in Table 2. Table 2 lists recommended wire lengths and cross section area for power supply systems.
8. FUNCTION 8-1. Room Temperature Control ● Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the remote control unit. ● The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit. Signal from remote control unit 3 minutes 3 minutes 3 minutes Thermo. OFF set temp. 3 minutes Thermo. ON Thermo. OFF 3 minutes 3 minutes 3 minutes Thermo. ON Thermo.
8-2. Dry Operation (Dehumidification) ● Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by running at low level to dehumidify without greatly reducing the room temperature. The air conditioner repeats the cycle of turning ON and OFF automatically as shown in the chart below according to the room temperature. Room temp. Cooling operation T+2 °C Set temp.
8-4 LOW AMBIENT FAN SPEED CONTROL < FOR AER518SCL3 > ● This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the compressor when the outdoor temperature is very low. ● When the air temp. thermistor (TH4) on the outdoor units detects a change in temperature, the solid state relay (SSR) inside the electrical component box activates to control the fan speed accordingly. ● As the outdoor temperature decreases and drops below 28.
(FOR AER522SCL3) This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the compressor when the outdoor temperature is very low. When the outdoor air tem. thermistor (TH4) on the outdoor unit detects a change in temperature,(below 28.5°C) the outdoor fan speed goes to low speed of the motor. When the Liquid Pressure decresases and drops below 16 bar,the outdoor fan speed startito gradually slow down following the line as in the diagram below.
9. REFRIGERANT R407C : SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9-1. Characteristics of new refrigerant R407C 9-1-1. What is new refrigerant R407C R407C is a new refrigerant that contains three types of non-azeotropy-type mixed refrigerant which does not adversely affect the Earth's ozone layer. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 9-1-2. Components (mixing proportions) HFC32 (23%) / HFC125 (25%) / HFC134a (52%) 9-1-3.
9-3. Tools specifically for R407C ● For servicing, use the following tools for R407C Tool Distinction Tool Name • Gauge manifold • Charging hose • Gas leak detector • Refrigerant cylinder • Charging cylinder Tools specifically for R407C • Refrigerant recovery unit • Vacuum pump with anti-reverse flow (✽1) (Solenoid valve-installed type, which prevents oil from flowing back into the unit when the power is off, is recommended.) • Vacuum pump (✽2) ..... can be used if the following adapter is attached.
9-5. In case of compressor malfunction CAUTION ● Should the compressor malfunction, be sure to replace compressor as quickly as possible. ● Use only the tools indicated exclusively for R407C. ➞ See "10-3. Tools specifically for R407C". 9-5-1.Procedure for replacing compressor (1) Recovering refrigerant • Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the refrigerant recovery unit for R407C. (1).
(5) Recharging Valve • Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation. CAUTION Liquid ● Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.
9-6. In case refrigerant is leaking CAUTION ● Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant. (1) Detecting Leaks • Use the detector for R407C to locate refrigerant leak points. (2) Recovering refrigerant (1).
(6) Recharging Valve • Be sure to charge the specified amount of refrigerant in liquid state using the service port of wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation. CAUTION ● Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.
9-7. Charging additional refrigerant 9-7-1.When tubes are extended • Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state. CAUTION ● Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "10-6. In case refrigerant is leaking" and completely carry out repairs. Only then should you recharge the refrigerant. 9-8.
10. TROUBLESHOOTING 10-1. Check before and after troubleshooting WARNING Hazardous voltage can cause ELECTRIC SHOCK or DEATH. Disconnect power or turn off circuit breaker before you start checking or servicing. 10-1-1. Check power supply wiring. ● Check that power supply wires are correctly connected to terminals L and N on the terminal plate in the outdoor unit.
10-2. Air conditioner does not operate. 10-2-1. Circuit breaker trips (or fuse blows). A. When the circuit breaker is set to ON, it is tripped soon. (Resetting is not possible.) ● There is a possibility of ground fault. ● Check insulation resistance. If resistance value is 2MΩ or less, insulation is defective (“NO”). 1 Power supply wiring L1 Power L2 supply L3 1 Outdoor unit L1 2 Inter-unit wiring Indoor unit 1 1 2 2 4 4 L2 L3 Circuit breaker N N Ground * Set circuit breaker to OFF.
10-2-2. Neither indoor nor outdoor unit runs. A. Power is not supplied. • Check power supply. Circuit breaker is tripped. Reset breaker. Power failure Wait for recovery or contact power company. NO Power is being supplied to the outdoor unit. B. Check remote control unit. • Try to run with another remote control unit. Does not run. Refer to Step C below. OK First remote control unit is defective. • Check for residue buildup on transmitter of remote control unit. Clean transmitter.
E. Check fuse on the indoor PCB Ass'y. • Check fuse on indoor PCB Ass'y for continuity. (F) If fuse has been blown, • Measure resistance of indoor fan motor winding. (FMI ) OK OK • Measure resistance of outdoor fan motor winding. (FMO) • Check operation lamp to see if light is ON. Light is OFF OK • Measure resistance of primary and secondary winding of transformer. (TR) • Measure resistance of flap motor winding. (FLP) OK OK Measure resistance of either power relay or magnetic contactor.
10-2-3. Only outdoor unit does not run. A. Check MODE selector switch of remote control unit. • Check that MODE selector switch is not set at "FAN". If it is set at FAN, Set to "COOL". NOTE Outdoor unit does not run when air conditioner is in following conditions. ● During thermo OFF (when the room temperature is below the set temperature). ● During freeze prevention (for at least 6 minutes). B. Check setting temperature.
E. Check negative phase relay. • Check negative phase relay to see if it has operated. (47C) YES • Rewire power supply wires. F. Check magnetic contactor. • Check coil resistance of magnetic (MG) contactor. G. Check indoor PCB Ass'y. H. Check compressor motor protector. Temperature of compressor is abnormally high. • Check compressor motor internal protector. (49C) YES Outdoor heat exchanger coil is dirty or there are obstacles near air suction inlet. NO Refrigerant gas shortage.
10-3. Some part of air conditioner does not operate. 10-3-1. Only indoor fan does not run. • Check fan rotation. Turn fan gently once or twice by hand. • Check fan casing foreign matter on inside. Fan cannot be turned. Fan motor burnout or foreign matter in bearings. Remove foreign matter or repair. Repair or replace. • Measure resistance of indoor fan motor winding. OK • Check fan motor capacitor. 10-3-2. Only outdoor fan does not run. • Check fan rotation. Turn fan gently once or twice by hand.
● Check transformer in outdoor unit. (AER518SCL3 Only) • Measure resistance of primary and secondary winding. (TR2) ● Check fuse on outdoor PCB Ass'y. (AER518SCL3 Only) • Check fuse on outdoor PCB Ass’y (F) for continuity. If fuse blows, • Measure resistance of primary (TR2) winding of transformer. OK • Measure resistance of outdoor fan motor winding. OK • Outdoor PCB Ass’y is defective.
10-3-3. Only compressor does not run. • Measure resistance of compressor motor winding. 10-3-4. Only flap motor does not run • Measure resistance of flap motor winding. (FLP) 10-3-5. Function of outdoor fan speed control does not work properly. ( For AER518SCL3) • Check solid state relay in outdoor (SSR) unit. 10-3-4. Only flap motor does not run. 10-3-5. Function of outdoor fan speed control does not work properly. 10-3-4. Only flap motor does not run. 10-3-5.
10-4. Air conditioner operates, but abnormalities are observed. 10-4-1. Poor cooling. • Check position of remote control unit. • Cool air from air conditioner reaches position directly. YES Change position of remote control unit. • Wide and narrow tubes between indoor unit and outdoor unit are insulated. NO Insulate both wide and narrow tubes separately and then tape together. YES • Measure temperature of suction and discharge air of air conditioner. Temperature difference is small.
10-5. If a sensor is defective. 10-5-1. Indoor coil temp. thermistor (TH1) is defective. A. Open When thermistor opens, the air conditioner will be in the following conditions as the controller tries to detect extremely low indoor coil temperature. In Cooling mode: Finction of freeze prevention continues to work. That is, the controller turns both compressor and outdoor fan motor periodically ON and OFF for several minutes. (Refer to "5-2. Freeze Prevention") B.
11. CHECKING ELECTRICAL COMPONENTS 11-1. Measurement of Insulation Resistance Ground wire Clip ● The insulation is in good condition if the resistance exceeds 2MΩ. Probe 11-1-1. Power Supply Wires Insulation tester Clamp the ground wire of the power supply wires with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires. (Fig. 1) Fig. 1 Terminal plate Then measure the resistance between the ground wire and the other power wire.
11-2. Checking Continuity of Fuse on PCB Ass'y Fuse ● Remove the PCB Ass’y from the electrical component box. Then pull out the fuse from the PCB Ass’y. (Fig. 5) ● Check for continuity using a multimeter as shown in Fig. 6. PCB Ass’y Fig. 5 11-3. Checking Motor Capacitor Remove the lead wires from the capacitor terminals, and then place a probe on the capacitor terminals as shown in Fig. 7.
12. DISASSEMBLY PROCEDURE FOR INDOOR UNIT IMPORTANT! Please Read Before Starting Safety precautions for servicing the CEILING-MOUNTED indoor unit ● Before attempting to replace heavy and bulky parts such as the evaporator and fan motor, disconnect the indoor unit from the system and place it on the floor. Refer to the steps given below. ● When checking or servicing the air intake grille, side panels, or electrical component box, first check that power is completely disconnected.
12-2. Removing Side Panels Hook (1) Remove the 3 screws attaching the left side panel. (Fig. 3) Slot (2) Note the position of the hook on the inside of the left side panel. To disengage the hook from the slot, slide down the panel for removal. (Fig. 3) Hook (3) Do the same procedure for the right side panel. Tapping screws (4 × 10 mm) Side panel 12-3. Access and Removal of Electrical Component Box Fig.3 WARNING Hazardous voltage can cause ELECTRIC SHOCK or DEATH.
12-4. Removing Flap Motor (1) Remove the 3 screws used to mount the top panel. (Fig. 6) Screw Top panel (2) While unlatching the 2 tabs inside the back of the top panel, lift the top panel diagonally in the direction of the arrow.(Fig. 6) (3) Remove the 2 screws to pull off the flap motor. The arm and cam come off together with the motor. (Fig. 7) Flap motor Fig.6 Blade Arm Cam Screw Flap motor 12-5. Removing Evaporator (=Indoor Heat Exchange Coil) Fig.
(3) Remove the 6 screws of the front panel and pull it toward you. (Fig. 9) (4) Remove the 2 screws used to mount the evaporator. (Fig. 10) Screw (5) Remove the rubber cap to pull the thermistor out of the evaporator. (Fig. 10) Front panel (6) Cut the plastic clamp securing the drain hose to the front fan casing. (Fig. 10) Fig.9 (7) The evaporator is built into the drain pan. Pull out the drain pan together with the evaporator in the direction of the arrow. (Fig.
12-6. Removing Fan and Fan Motor (1) Unlatch the 2 hooks on each side to take off the front fan casing. (Fig. 12) Hook Hook Front fan casing Fig.12 (2) Remove the 2 screws attaching the rear fan casing and then pull the fan casing out. Rear fan casing Fig.13 (3) Insert a hex wrench in the fan boss and turn it counterclockwise to loosen the centrifugal fan. Centrifugal fan The fan can be removed by sliding it to the left. (Fig. 14) Hex wrench (3mm or 7/64") Fig.
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