FILE NO.
Adoption of New Refrigerant This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer. WARNING Cleaning of the air filter and other parts of the air filter involves dangerous work in high places, so be sure to have a service person do it. Do not attempt it yourself. The cleaning diagram for the air filter is there for the service person, and not for the customer. CONTENTS SAFETY CAUTION .....
7. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS ........... 45 7-1. Outdoor Unit Control ........................................................................................ 45 7-2. Outline of Main Controls .................................................................................. 49 8. TROUBLESHOOTING .............................................................................. 55 8-1. Summary of Troubleshooting ...........................................................................
SAFETY CAUTION The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents (Indications/Illustrated marks), and keep them.
WARNING Check earth wires. Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of the main unit, otherwise an electric shock is caused when a leak occurs. If the earth wire is not correctly connected, contact an electric engineer for rework. Do not modify the products. Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury. Prohibition of modification. Use specified parts. Do not bring a child close to the equipment. ∗).
WARNING Insulator check After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 2MΩ or more between the charge section and the non-charge metal section (Earth position). If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side. Ventilation When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches to a fire, poisonous gas generates.
• New Refrigerant (R410A) This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer. 1. Safety Caution Concerned to New Refrigerant The pressure of R410A is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed.
4. Tools 1. Required Tools for R410A Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.
n Combination Pattern (Indoor Unit / Outdoor Unit) Simultaneous twin 4-way air discharge cassette type Concealed duct type Ceiling type RAV-SM1104UT-E RAV-SM1102BT-E RAV-SM1102CT-E RAV-SM1104UT-E RAV-SM1102BT-E RAV-SM1102CT-E Simultaneous triple 4-way air discharge cassette type Concealed duct type Ceiling type High wall type (2 series) RAV-SM804UT-E RAV-SM802BT-E RAV-SM802CT-E RAV-SM802KRT-E RAV-SM804UT-E RAV-SM802BT-E RAV-SM802CT-E RAV-SM802KRT-E RAV-SM804UT-E R
RAV-SM2244AT series Slimultaneous twin SM110 — SM110 Simultaneous triple SM80 — SM80 — SM80 Simultaneous double twin SM56 — SM56 — SM56 Branch kit RBC-TWP101E RBC-TRP100E — SM56 RAV-SM2804AT series Slimultaneous twin SM140 — SM140 Simultaneous triple SM80 — SM80 — SM80 Simultaneous double twin SM80 — SM80 — SM80 RBC-DTWP101E Branch kit RBC-TWP101E – 10 – RBC-TRP100E — SM80 RBC-DTWP101E
1. SPECIFICATIONS 1-1. Indoor Unit 1-1-1. 4-Way Cassette Type Model Indoor unit 1 RAV-SM 1104UT-E 1404UT-E 1104UT-E 1404UT-E Indoor unit 2 RAV-SM 1104UT-E 1404UT-E 1104UT-E 1404UT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.0 Power supply 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Indoor unit Running current (A) Power consumption Cooling Power factor 10.09 – 9.
1-1-2. Duct Type Model Indoor unit 1 RAV-SM 1102BT-E 1402BT-E 1102BT-E 14002BT-E Indoor unit 2 RAV-SM 1102BT-E 1402BT-E 1102BT-E 1402BT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.0 Power supply 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Indoor unit Running current (A) Power consumption Cooling Power factor 9.55 7.12 9.55 (%) 94 94 94 94 2.81 2.41 2.
1-1-3. Ceiling Type Model Indoor unit 1 RAV-SM 1102CT-E 1402CT-E 1102CT-E 1402CT-E Indoor unit 2 RAV-SM 1102CT-E 1402CT-E 1102CT-E 1402CT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.0 Power supply 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Indoor unit Running current (A) Power consumption Cooling Power factor 9.55 7.12 9.55 (%) 94 94 94 94 2.81 2.41 2.
1-1-4. 4-Way Cassette Type Indoor unit 1 RAV-SM 804UT-E 804UT-E 804UT-E 804UT-E Indoor unit 2 RAV-SM 804UT-E 804UT-E 804UT-E 804UT-E Indoor unit 3 RAV-SM 804UT-E 804UT-E 804UT-E 804UT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Model Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-1-5. Duct Type Indoor unit 1 RAV-SM 802BT-E 802BT-E 802BT-E 802BT-E Indoor unit 2 RAV-SM 802BT-E 802BT-E 802BT-E 802BT-E Indoor unit 3 RAV-SM 802BT-E 802BT-E 802BT-E 802BT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Model Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.0 Power supply 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Indoor unit Running current (A) Power consumption Cooling Power factor 9.
1-1-6. Ceiling Type Indoor unit 1 RAV-SM 802CT-E 802CT-E 802CT-E 802CT-E Indoor unit 2 RAV-SM 802CT-E 802CT-E 802CT-E 802CT-E Indoor unit 3 RAV-SM 802CT-E 802CT-E 802CT-E 802CT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Model Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.0 Power supply 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Indoor unit Running current (A) Power consumption Cooling Power factor 9.
1-1-7. High Wall Type Indoor unit 1 RAV-SM 802KRT-E 802KRT-E 802KRT-E 802KRT-E Indoor unit 2 RAV-SM 802KRT-E 802KRT-E 802KRT-E 802KRT-E Indoor unit 3 RAV-SM 802KRT-E 802KRT-E 802KRT-E 802KRT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Model Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-1-8. 4-Way Cassette Type Model Indoor unit 1 RAV-SM 564UT-E 804UT-E 564UT-E 804UT-E Indoor unit 2 RAV-SM 564UT-E 804UT-E 564UT-E 804UT-E Indoor unit 3 RAV-SM 564UT-E 804UT-E 564UT-E 804UT-E Indoor unit 4 RAV-SM 564UT-E 804UT-E 564UT-E 804UT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-1-9. Compact 4-Way Cassette (600 × 600) Type Model Indoor unit 1 RAV-SM562MUT-E RAV-SM562MUT-E Indoor unit 2 RAV-SM562MUT-E RAV-SM562MUT-E Indoor unit 3 RAV-SM562MUT-E RAV-SM562MUT-E Indoor unit 4 RAV-SM562MUT-E RAV-SM562MUT-E Outdoor unit RAV-SM2244AT8-E RAV-SM2244AT7 Cooling capacity (kW) 20.0 20.0 Heating capacity (kW) 22.4 22.4 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz 11.51 – 10.54 11.51 (kW) 7.12 7.12 (%) 94 94 2.81 2.81 C — 10.34 – 9.47 10.
1-1-10. Slim Duct Type Model Indoor unit 1 RAV-SM564SDT-E RAV-SM564SDT-E Indoor unit 2 RAV-SM564SDT-E RAV-SM564SDT-E Indoor unit 3 RAV-SM564SDT-E RAV-SM564SDT-E Indoor unit 4 RAV-SM564SDT-E RAV-SM564SDT-E Outdoor unit RAV-SM2244AT8-E RAV-SM2244AT7 Cooling capacity (kW) 20.0 20.0 Heating capacity (kW) 22.4 22.4 3 phase 380 – 415V 50Hz 3 phase 380V 60Hz Power supply Indoor unit Running current (A) Power consumption Cooling Power factor 11.51 – 10.54 11.
1-1-11. Duct Type Model Indoor unit 1 RAV-SM 562BT-E 802BT-E 562BT-E 802BT-E Indoor unit 2 RAV-SM 562BT-E 802BT-E 562BT-E 802BT-E Indoor unit 3 RAV-SM 562BT-E 802BT-E 562BT-E 802BT-E Indoor unit 4 RAV-SM 562BT-E 802BT-E 562BT-E 802BT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-1-12. Ceiling Type Model Indoor unit 1 RAV-SM 562CT-E 802CT-E 562CT-E 802CT-E Indoor unit 2 RAV-SM 562CT-E 802CT-E 562CT-E 802CT-E Indoor unit 3 RAV-SM 562CT-E 802CT-E 562CT-E 802CT-E Indoor unit 4 RAV-SM 562CT-E 802CT-E 562CT-E 802CT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-1-12. High Wall Type Model Indoor unit 1 RAV-SM 562KRT-E 802KRT-E 562KRT-E 802KRT-E Indoor unit 2 RAV-SM 562KRT-E 802KRT-E 562KRT-E 802KRT-E Indoor unit 3 RAV-SM 562KRT-E 802KRT-E 562KRT-E 802KRT-E Indoor unit 4 RAV-SM 562KRT-E 802KRT-E 562KRT-E 802KRT-E Outdoor unit RAV-SM 2244AT8-E 2804AT8-E 2244AT7 2804AT7 Cooling capacity (kW) 20.0 23.0 20.0 23.0 Heating capacity (kW) 22.4 27.0 22.4 27.
1-2. Outdoor Unit Model Outdoor unit RAV-SM 2804AT8-E 2244AT7 2804AT7 1 phase 380 – 415V 50Hz 1 phase 380V 60Hz (Power exclusive to outdoor is required.) Power supply Type Compressor 2244AT8-E Hermetic compressor Motor (kW) Pole Refrigerant charged (kg) Refrigerant control Hermetic compressor 3.75 3.75 3.75 3.75 4 4 4 4 5.9 5.9 5.9 5.9 Pulse motor valve Pulse motor valve Max. total length (m) 70 70 70 70 Min. length (m) 7.5 7.5 7.5 7.
1-3. Operation Characteristic Curve • Operation characteristic curve RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E 18 18 16 16 14 14 SM280 SM280 12 Current (A) Current (A) 12 10 8 SM224 6 4 0 0 20 40 60 SM224 8 6 4 • Conditions Indoor : DB27˚C/WB19˚C Outdoor : DB35˚C Air flow : High Pipe length : 7.5m 400V, 50Hz (3 phase) 2 10 80 • Conditions Indoor : DB20˚C Outdoor : DB7˚C/WB6˚C Air flow : High Pipe length : 7.
• Capacity variation ratio according to temperature RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG) 105 120 100 110 95 100 90 Capacity ratio (%) Capacity ratio (%) 90 85 80 75 70 65 60 55 80 70 60 50 40 30 20 • Conditions Indoor : DB27˚C/WB19˚C Indoor air flow : High Pipe length : 7.5m 10 50 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Outdoor temp.
2. CONSTRUCTION VIEWS (EXTERNAL VIEWS) 2-1.
RBC-DTWP101E (Simultaneous Double Twin) Outer diameter Ø25.4 B 24 Inner diameter ØC 54 Inner diameter ØD 22 Inner diameter ØD A Inner diameter Ø28.6 1 pc. Model Gas side A B C D Q’ty 74 37 25.4 15.9 1 42 23 15.9 15.9 2 43 23 15.9 12.7 2 35 18 12.7 9.5 1 34 14 9.5 9.5 2 36 14 9.5 6.
RBC-TRP100E (Simultaneous Triple) Header assembly 300 80 Inner diameter Ø15.9 80 100 Inner diameter Ø25.4 100 1 pc. Branch pipe assembly 35 80 80 Inner diameter Ø9.52 100 Inner diameter Ø12.7 100 1 pc. Insulator Gas side socket Liquid side socket Ø15.9 Outer diameter Ø25.4 Ø12.7 (External diameter) (External diameter) 1 pc. Inner diameter Ø28.6 1 pc. Ø9.5 Ø12.7 (External diameter) (External diameter) 3 pcs. – 29 – 9 6 26 22 Ø25.
RBC-TWP101E (Simultaneous Twin) Outer diameter Ø25.4 B 24 Inner diameter ØC 54 Inner diameter ØD 22 Inner diameter ØD A Inner diameter Ø28.6 1 pc. Model A B C D Q’ty Gas side 74 37 25.4 15.9 1 Liquid side 35 18 12.7 9.
3. OUTDOOR UNIT REFRIGERANTING CYCLE DIAGRAM RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG) Solenoid valve Check joint High-pressure side TO sensor Muffler Ø45 × 230 L P Pressure switch Check valve TL sensor 4-way valve Check joint Low-pressure side TD sensor TE sensor P Pressure sensor Distributor Heat exchanger Ø8, 2 rows, 60 stages + Ø9.
Systematic diagram of refrigerating cycle RAV-SM2244 series Pressure (MPa) Cooling Heating Pipe surface temperature (°C) (kg/cm²g) Discharge Suction Indoor heat exchanger Compressor Outdoor heat drive revolution frequency exchanger (rps) (TE) ∗ Pd Ps Pd Ps (TD) (TS) (TC) Standard 3.14 0.88 32.0 9.0 84 14 10 37 64 Overload 3.54 1.14 36.1 11.6 88 17 16 46 Low load 1.65 0.65 16.8 6.6 41 7 5 Standard 2.60 0.67 26.5 6.8 73 2 Overload 3.24 1.08 33.1 11.
4. WIRING DIAGRAM 4-1. Outdoor Unit RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG) Compressor IPDU board MCC-1596 Noise Filter P.C. board MCC-1600 Fan IPDU board MCC-1597 Interface (CDB) P.C.
5. SPECIFICATIONS OF ELECTRICAL PARTS 5-1. Outdoor Unit RAV-SM2244AT8 (Z) (ZG) -E, RAV-SM2804AT8 (Z) (ZG) -E RAV-SM2244AT7 (Z) (ZG), RAV-SM2804AT7 (Z) (ZG) No.
6. REFRIGERANT R410A This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer. The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22).
Table 6-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R410A R22 1/4 6.4 0.80 0.80 3/8 9.5 0.80 0.80 1/2 12.7 0.80 0.80 5/8 15.9 1.00 1.00 1. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.
c) Insertion of Flare Nut d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ according to the type of flare tool. When using a conventional flare tool, be sure to secure “dimension A” by using a gauge for size adjustment. ØD A Fig.
6˚ to 4 45˚ A B C 43˚ D to 4 5˚ Fig. 6-2-2 Relations between flare nut and flare seal surface 2. Flare Connecting Procedures and Precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. b) Correctly align the processed flare surface with the union axis. c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is the same as that for conventional R22.
6-3. Tools 6-3-1. Required Tools Refer to the “4. Tools” (Page 8) 6-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.
1) Be sure to make setting so that liquid can be charged. 2) When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
2. Characteristics required for flux 6-5-3. Brazing • Activated temperature of flux coincides with the brazing temperature. • Due to a wide effective temperature range, flux is hard to carbonize. • It is easy to remove slag after brazing. • The corrosive action to the treated metal and brazing filler is minimum. • It excels in coating performance and is harmless to the human body.
6-6. Instructions for Re-use Piping of R22 or R407C Instruction of Works: The existing R22 and R407C piping can be reused for our digital inverter R410A products installations. WARNING Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site. If the definite conditions can be cleared, it is possible to update the existing R22 and R407C pipes to those for R410A models. 6-6-1.
6-6-5. Final Installation Checks Is there no scratch or dent on the existing pipes? Existing pipe: NO * Use a new pipes. NO Is it possible to operate the existing air conditioner? YES ∗ After the existing air conditioner operated in cooling mode for approx. 30 minutes or longer*, recover the refrigerant. ∗ For cooling the pipes and recovering of oil • Refrigerant recovery: Pump down method Nitrogen gas pressure 0.
6-6-6. Handling of Existing Pipe When using the existing pipe, carefully check it for the following: • Wall thickness (within the specified range) • Scratches and dents • Water, oil, dirt, or dust in the pipe • Flare looseness and leakage from welds • Deterioration of copper pipe and heat insulator • Before recovering the refrigerant in the existing system, perform a cooling operation for at least 30 minutes. • When using a Ø19.
7. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS 7-1. Outdoor Unit Control 7-1-1. Print Circuit Board, MCC-1596 (Compressor IPDU) CN851 (Red) Connector for MCC-1597 (CN505) CN07 (Blue), CN08 (Blue) Terminal for reactor CH44 CN101 (White) Connector for MCC-1597 (CN502) CN03 (Black) Terminal for power relay F02 Electric circuit protective fuse (500V, 31.5A) CN02 (White) Terminal for MCC-1600 (CN17) F01 Electric circuit protective fuse (500V, 31.
7-1-2.
7-1-3. Print Circuit Board, MCC-1599 (Interface (CDB)) CN708 (Blue) Connector for power relay coil CN702 (White) 2-way valve connector CN608 (White) Connector for MCC-1600 (CN50) CN02 (Red) Connector for MCC-1600 (CN10 and CN19) CN802 (White) Connector for MCC-1597 (CN504) F01 CN700 (Yellow) 4-way valve connector Power supply protective fuse (250V, 3.15A) Temp.
7-1-4. Print Circuit Board, MCC-1600 (Noise Filter) CN05 (Red) Power supply terminal (L1) CN10 (Red) Terminal for MCC-1599 (CN02) and Terminal for PTC thermistor CN16 (Red) Terminal for power relay F01 Varistor protective fuse (250V, 6.3A) CN06 (White) Power supply terminal (L2) CN17 (White) Terminal for F02 Varistor protective fuse MCC-1596 (CN02) (250V, 6.
7-2. Outline of Main Controls 1. PMV (Pulse Motor Valve) control 1) The aperture of the PMV (1, 2) is controlled between 88 (44 + 44) to 1000 (500 + 500) pulses during operation. 2) During cooling and heating operations, the PMV aperture is controlled by the temperature difference between a detected temperature from a TS sensor and a saturation temperature equivalent value (TU temperature) from a Ps sensor. (SH control).
3. Outdoor fan revolution number control Control of fan revolution number and the fan taps in this unit are shown below.
4. Defrost control 1) During heating operations, defrost operations are performed when the temperature from the TE sensor satisfies any of the conditions in the A to D zones. 2) During defrosting operations, defrost will be terminated if the temperature from the TE sensor continues at 12°C or higher for 3 seconds or if the temperature is 7°C ≤ TE < 12°C for 1 minute.
7. Heat sink temperature detection control 1) IGBT overheating prevention is protective control performed by a thermistor (TH sensor) in proximity to IGBT. 2) When a temperature of TH ≥ 83°C is detected, the fan tap is moved by 1 step up. Thereafter step-up is performed at a rate of +1 tap/5 seconds until a maximum fan tap is reached. 3) After 2) above, operation is returned to normal fan control at a temperature of TH < 78°C. 4) Operation of the compressor is terminated at a temperature of TH ≥ 100°C.
12. SV2 valve control The conditions for opening and closing the SV2 valve are shown in the table below. SV2 Valve “Open” Conditions SV2 Valve “Close” Conditions (1) When operation stopped after operating (2) When power placed “ON” (3) When 30 second elapses after first startup operation when power ON at TO ≤ 5° C When 8 minutes elapsed after starting operation. (4) When Ps ≤ 0.23 MPa When Ps ≥ 0.
14. Coil heating control 1) This control has the function of heating the compressor by applying a current to the compressor when not operating instead using a case heater. This control is for the purpose of preventing stagnation of the refrigerant inside the compressor. 2) Malfunction in the compressor may result if a current is not applied for a specified time before a test run after installation as was previously the case.
8. TROUBLESHOOTING 8-1. Summary of Troubleshooting 1. Before troubleshooting 1) Required tools/instruments • + and – screwdrivers, spanners, radio cutting pliers, nippers, push pins for reset switch • Tester, thermometer, pressure gauge, etc. 2) Confirmation points before check a) The following operations are normal. 1. Compressor does not operate.
1. Before troubleshooting 1) Required tools/instruments • + and – screwdrivers, spanners, radio cutting pliers, nippers, etc. • Tester, thermometer, pressure gauge, etc. 2) Confirmation points before check a) The following operations are normal. 1. Compressor does not operate.
8-2. Troubleshooting 8-2-1. Outline of judgment The primary judgment to check whether a trouble occurred in the indoor unit or outdoor unit is carried out with the following method. Method to judge the erroneous position by flashing indication on the display part of the indoor unit (sensors of the receiving part) The indoor unit monitors the operating status of the air conditioner, and the blocked contents of self-diagnosis are displayed restricted to the following cases if a protective circuit works.
Lamp indication Operation Timer Ready Check code F01 F02 Alternate flash P10 Cause of trouble occurrence Heat exchanger sensor (TCJ) error Heat exchanger sensor (TC) error Heat exchanger sensor (TA) error Indoor unit sensor error F04 F06 Operation Timer Ready F07 F08 Alternate flash F12 F13 Discharge temp. sensor (TD) error Temp. sensor (TE) error Temp. sensor (TL) error Temp. sensor (TO) error Temp. sensor (TS) error Temp. sensor (TH) error Temp.
8-2-2.
8-2-3. Monitor Function of Remote Controller Switch n Calling of sensor temperature display Each data of the remote controller, indoor unit and outdoor unit can be understood by calling the service monitor mode from the remote controller. 1 2 CL TEST Push + buttons simultaneously for 4 seconds to call the service monitor mode. The service monitor goes on, the master indoor unit No. is displayed at first and then the temperature of item code is displayed. TEMP.
8-2-4.
ALT (Alternate): Alternate flashing when there are two flashing LED Remote controller indication F01 F02 F10 F29 P01 P10 P12 P31 — Sensor lamp part Block indication Operation Timer Ready Flash ALT ¥ ¥ ALT ¥ ¥ ALT ¥ ¥ SIM ¥ ¥ ALT ¥ ¥ ALT ¥ ¥ ALT ¥ ¥ ALT ¥ ¥ l l l — l By unit with warning No. — L20 l l l l ALT — ¥ ¡ — Representative defective position Detection Indoor unit Heat exchanger sensor (TCJ) error Indoor unit Heat exchanger sensor (TC) error Indoor unit Room temp.
Error mode detected by indoor unit Operation of diagnostic function Check code Cause of operation E03 No communication from remote controller (including wireless) and communication adapter E04 The serial signal is not output from outdoor unit to indoor unit. • Miswiring of inter-unit wire • Defective serial sending circuit on outdoor P.C. board • Defective serial receiving circuit on indoor P.C.
Error mode detected by outdoor unit The check code has been ramified from 4 series and after. The ramified check code is displayed only when both the indoor unit and the outdoor unit are 4 series and after. (Ex. Combination of RAV-SM1404UT-E with RAV-SM2804AT8-E) When the indoor unit is 3 series and before, the conventional check code is displayed. (Ex. Combination of RAV-SM1402CT-E and RAV-SM2804AT8-E: Outdoor unit only is 4 series.
Operation of diagnostic function Check code Indoor unit before 3 series Cause of operation after 4 series Status of air conditioner Condition H03 Current detection circuit error Stop Displayed when error is detected P05 Open phase of 3-phase power supply Stop Displayed when error is detected H03 Judgment and measures 1. Check outdoor P.C. board (MCC-1596). (AC current detection circuit) 1. Check open phase of 3-phase power supply. 2.
Error mode detected by remote controller or central controller (TCC-LINK) Operation of diagnostic function Check code Cause of operation Status of air conditioner Judgment and measures Condition Power supply error of remote controller, Indoor EEPROM error 1. Check remote controller inter-unit wiring. 2. Check remote controller. 3. Check indoor power wiring. 4. Check indoor P.C. board. 5. Check indoor EEPROM. (including socket insertion) → Automatic address repeating phenomenon generates.
8-2-5. Diagnostic Procedure for Each Check Code (Outdoor Unit) 1) This section describes the diagnostic method for each check code displayed on the remote controller. 2) In some cases, a check code indicates multiple symptoms. In this case, confirm LED display on the outdoor P.C. board to narrow the contents to be confirmed. 3) The check code on the remote controller is displayed only when the same error occurred continuously by multiple times while LED of the outdoor P.C.
Check code Outdoor LED display [F04] ¡ ¡ l l ¡ ¡ [Discharge temp. sensor (TD) error] ¡ l l ¥ l l [F06] NO Is CN603 connection normal? Is resistance value of TD sensor normal? Correct connector. Sensor error → Replace YES Check outdoor P.C. board (MCC-1599). Defect → Replace • There is a possibility that it is one of the following errors. Confirm LED on outdoor P.C. board to judge which error it is. Heat exchanger temp. sensor (TE) error, Heat exchanger temp.
Check code Outdoor LED display [F08] ¡ ¡ l l ¡ ¡ Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Outside air temp. sensor (TO) error] ¡ l ¥ l l l Is CN602 connection normal? Is resistance value of TO sensor normal? NO Correct connector. Sensor error → Replace YES Check outdoor P.C. board (MCC-1599). Defect → Replace [F12] ¡ ¡ l l ¡ ¡ [Suction temp.
Check code Outdoor LED display [F23] ¡ ¡ ¡ ¥ ¡ ¡ ¥ ¥ ¥ l l l Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [PS sensor error] Is connector of Ps sensor correctly connected? YES Correct connection of connector. Connector: CN606, White Are the output current characteristics of Ps sensor normal? YES NO NO Sensor error ∗ Pressure by pressure gauge (Check joint) Pressure display on LED display Output power of I/F (CDB) P.C.
Check code Outdoor LED display [H02] ¡ ¡ l ¡ l l ¡ Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Compressor lock] l l l Is power supply voltage normal? AC342 to 457V l Is wire connection normal? Compressor lead (Board side, Compressor side), Reactor lead, Power supply lead ¥ NO Correct power supply line. YES NO Check wire connection and correct it. YES Check outdoor P.C. board.
Check code Outdoor LED display [H06] ¡ ¡ ¡ ¡ ¥ ¥ Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Low pressure protective operation] l l l l l Are gas pipe, liquid pipe and service valve of the outdoor unit fully opened? NO Open the service valve fully.
Check code Outdoor LED display Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) ∗ There is a possibility that it is one of the following errors. Confirm LED on outdoor P.C. board to judge which error it is. Communication error between MCU, Heat sing temp.
Check code Outdoor LED display [P03] ¡ ¡ ¡ ¡ ¡ ¡ ¥ ¥ l l l l Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Discharge temp. error] Is there no gas leak? Is refrigerant charge amount adequate? NO Repair defective position. Recharge refrigerant. NO Repair defective position. Replace defective part. YES Is PMV normal? YES YES Is it not abnormal overload? Correct and clear the cause.
Check code Outdoor LED display Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [P04] C Heating operation Does the heating indoor fan normally operate? NO Are connections of connectors,capacitors and fan motor normal? YES NO YES Is there any element which blocks indoor heat exchanger? Filter clogging Clogging of heat exchanger Short circuit YES Elimination of blocking element Repair defective position.
Check code Outdoor LED display [P05] ¡ ¡ ¡ ¡ ¡ ¡ ¥ l Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Power supply error (Voltage error)] l l Is there no open phase of the power supply? l Is there no down or up of power supply voltage? (AC342 to 457V) ¥ YES Correct wiring. NO YES Confirm electric construction, etc. NO [P07] ¡ ¡ ¡ ¡ ¡ ¡ ¥ ¥ ¥ l l l Check outdoor P.C. board (MCC-1600).
Check code Outdoor LED display [P20] ¡ ¡ ¡ ¥ ¡ ¡ ¡ ¥ l l l l Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [High pressure protective operation] NO Is valve fully opened? Open valve fully. YES Reset the power supply and then perform test run matching to the season.
Check code Outdoor LED display [P22] ¡ ¡ ¡ ¥ ¡ ¡ ¡ ¥ ¥ l l l Check and troubleshooting (Item without special mention Indicates part of outdoor unit.) [Fan system error] NO Is there no problem on power supply voltage? (342 to 457V) Check wiring construction. Ask repair of power supply.
Temperature sensor Temperature – Resistance value characteristic table TD, TL sensors TA, TC, TCJ, TE, TS, TO sensors Representative value Representative value Ω) Resistance value (kΩ Temperature (°C) (Minimum value) (Standard value) (Maximum value) Ω) Resistance value (kΩ Temperature (°C) (Minimum value) (Standard value) (Maximum value) 0 32.33 33.80 35.30 0 10 19.63 20.35 21.09 10 150.5 92.76 161.3 99.05 172.7 20 12.23 12.59 12.95 20 58.61 62.36 66.26 25 9.75 10.00 10.
9. SETUP AT LOCAL SITE AND OTHERS 9-1. Calling of Error History The error contents in the past can be called. 1 2 3 TEMP. SET TEST Push + buttons simultaneously for 4 seconds or more to call the service check mode. Service Check goes on, the CODE No. 01 is displayed, and then the content of the latest alarm is displayed. The number and error contents of the indoor unit in which an error occurred are displayed.
n Indoor unit power-ON sequence Power ON • The unit without power feed waits entirely → Waiting status is released by system start • Reboot when power is fed on the way Not normal NO 3 minutes elapse Gr construction check YES Normal ∗ Gr normal 1) There is no duplicated indoor unit address. 2) There is no invalid indoor unit address. 3) Individual unit and master/follower units are not intermingled. 4) Only a unit for individual.
9-3. Outdoor Unit 9-3-1. Various Setting on Outdoor Unit (Existing piping, Power save, Cooling-only, etc.) The following settings are available by DIP switch setup and jumper line setup. Function Set position Existing piping setup Turn the switch to ON when Ø19.1 is used for the existing pipe. In this case, the heating capacity may lower according to outside temp. and indoor temp. in heating operation.
9-3-2. Service Support Function (LED Display, Switch Operation) 1. Outline A various setup and operation check can be performed by DIP switches at 3 positions (SW802, SW803, SW804) and the pushdown button switches (SW800, SW801) at 2 positions. Operation part Part No. Specifications SW800 Pushdown button switch SW803 DIP switch SW801 Pushdown button switch SW804 DIP switch SW802 DIP switch Operation contents Exchanges the displayed contents of LED (D800 to D804) on the outdoor control P.C.
9-3-3. Others 1. Selection of LED display (SW800, SW803 operation) 1) Display selection list The displayed contents of LED D800 to D804 on the outdoor control P.C. board can be exchanged by operation of SW803. Switch Function / Contents SW803 ON 1 2 3 SW803 TD SW803 2 3 4 TS SW803 1 2 3 4 3 4 1 TA SW803 3 4 1 2 3 4 2 3 4 2 3 ON 2 3 3 Current display The current value which flows in the outdoor unit is displayed.
2) Error display The error which is generating at present and the latest error (Latest error information including present) can be confirmed by lighting LED D800 toD804 on the outdoor control P.C. board. a) When all DIP switch SW803 are OFF, the status of error which is generating at present is displayed. b) <1> only of DIP switch SW803 is turned on, the error which generated before (Latest error information including present) is displayed.a) c) If there is an error, any of LED D800 to D804 goes on.
3) Sensor, current, compressor operation frequency, PMV opening display The values detected by the controller, such as temperature sensor or current value are simply confirmed.
4) Specific operation for maintenance check (SW801, SW804) The following specific operations for the maintenance check are performed by operation of SW801 or SW804. a) Select DIP switch SW804. (See table below) b) Push the pushdown button switch SW801 for approx. 1 second. c) The following functions start. While each function starts, LED D805 (Green) flashes. d) When pushing the pushdown button switch SW801 again for approx.
SW804 4 4-way valve relay operation (For RY700, CN70 check) Turn on 4-way valve power relay (RY700). When pushing SW801 again or when 2 minutes elapsed, the operation returns to the normal control. 4 SV valve relay operation (For RY702, CN702 check) Turn on SV valve relay (RY702). When pushing SW801 again or when 2 minutes elapsed, the operation returns to the normal control.
10. ADDRESS SETUP 10-1. Address Setup Procedure When an outdoor unit and an indoor unit are connected, or when an outdoor unit is connected to each indoor unit respectively in the group operation even if multiple refrigerant lines are provided, the automatic address setup completes with power-ON of the outdoor unit. The operation of the remote controller is not accepted while automatic address works. (Approx.
10-2. Address Setup & Group Control Indoor unit No. : N - n = Outdoor unit line address N (Max. 30) - Indoor unit address n (Max. 64) Group address : 0 = Single (Not group control) 1 = Master unit in group control 2 = Sub unit in group control Master unit (= 1) : The representative of multiple indoor units in group operation sends/receives signals to/from the remote controllers and sub indoor units. (* It has no relation with an indoor unit which communicates serially with the outdoor units.
10-2-2. Automatic Address Example from Unset Address (No miswiring) 1.
10-2-3. Automatic Address Example from Unset Address (No miswiring) 1. Standard (One outdoor unit) 1) Single 2) Twin 3) Triple (1-1) 1-2 Master/Header 1-1 Individual (1-1) (1-2) 1-2 Sub/Header 1-1 Sub/Follower (1-2) (1-3) 1-3 Master/Follower 1-1 Sub/Follower (Master/Header) Only turning on source power supply (Automatic completion) 2.
10-3. Remote Controller Wiring • Strip off approx. 9 mm the wire to be connected. • For single system, use non polarity, 2 core wire is used for wiring of the remote controller. (0.5 mm² to 2.0 mm² wires) • For the synchronous twin, triple system, use 2-conre shield wire (Vinyl cord for microphone 0.5 to 2.0 mm²) to conform to the EMC standard.
10-4. Address Setup (Manual setting from remote controller) In case that addresses of the indoor units will be determined prior to piping work after cabling work • Set an indoor unit per a remote controller. • Turn on power supply.
10-5. Confirmation of Indoor Unit No. Position 1. To know the indoor unit addresses though position of the indoor unit body is recognized • In case of individual operation (Wired remote controller : indoor unit = 1 : 1) (Follow to the procedure during operation) 1 2 ON / OFF Push button if the unit stops. UNIT LOUVER Push button. Unit No. 1-1 is displayed on LCD. (It disappears after several seconds.) The displayed unit No. indicate line address and indoor unit address.
Aiming in environmental preservation, it is strictly recommended to clean and maintain the indoor/outdoor units of the operating air conditioning system regularly to secure effective operation of the air conditioner. It is also recommended to maintain the units once a year regularly when operating the air conditioner for a long time. Check periodically signs of rust or scratches, etc. on coating of the outdoor units.
Digital Inverter Digital Inverter 11. INSTALLATION MANUAL Please read this Installation Manual carefully before installing the Air Conditioner. • This Manual describes the installation method of the outdoor unit. • For installation of the indoor unit, follow the Installation Manual attached to the indoor unit. 1 ACCESSORY PARTS Accessory Parts Part name Q’ty Shape Usage Installation manual 1 (Hand this directly to the customer.
Digital Inverter Digital Inverter 2 SAFETY PRECAUTIONS • • • • • • • Ensure that all Local, National and International regulations are satisfied. Read these “SAFETY PRECAUTIONS” carefully before installation. The precautions described below include important items regarding safety. Observe them without fail. After the installation work, perform a trial operation to check for any problem. Follow the Owner’s Manual to explain to the customer how to use and maintain the unit.
Digital Inverter Digital Inverter Required Tools/Equipment and Precautions for Use Prepare the tools and equipment listed in the following table before starting the installation work. Newly prepared tools and equipment must be used exclusively. 4 INSTALLATION CONDITIONS Before installation Legend Earthing Be sure to prepare to the following items before installation. WARNING : Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc.
Digital Inverter Digital Inverter Necessary Space for Installation (Unit: mm) CAUTION Do not install the outdoor unit in a location that is subject to combustible gas leaks. Accumulation of combustible gas around the outdoor unit may cause a fire. 500 mm Above unit is free 1. Single unit installation Obstacle at rear side Upper side is free 1. Single unit installation 2. Serial installation of two or more units 2.
Digital Inverter Digital Inverter Serial installation in front and rear NO GOOD Open above and to the right and left of the unit. The height of an obstacle in both the front and rear of the unit should be lower than the height of the outdoor unit. Do not support the outdoor unit only with the fixing leg. If only the end of the fixing leg is supported, it may deform.
Digital Inverter Digital Inverter Connecting the Gas Side Pipe Flaring 1. Cut the pipe with a pipe cutter. Be sure to remove burrs that may cause a gas leak. 2. Insert a flare nut into the pipe, and then flare the pipe. Use the flare nuts supplied with the air conditioner or those for R410A. Insert a flare nut into the pipe, and flare the pipe. As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended.
Digital Inverter Digital Inverter 6 Refrigerant Pipe Length AIR PURGING Simultaneous twin, triple Outdoor unit SM2244 SM2804 Outdoor unit SM2244 SM2804 Allowable pipe length (m) Branch piping Branch piping • 2 • 3– 2 • 3 • 4– 2 • 4 • 4– 3 Maximum Maximum 20 10 20 10 Total length • 1+ 2 • 1+ 3 • 1+ 4 Maximum 70 70 Indoor unit: Upper Outdoor unit: Upper 30 30 30 30 Indoor-indoor ('h) 0.5 0.5 Pipe diameter (mm) Main pipe Gas side Ø28.6 Ø28.
Digital Inverter Digital Inverter How to Open the Valve Insulating the Pipes Open or close the valve. • Liquid side Open the valve with a 4 mm hexagon wrench. • Gas side • Valve unit • • Using a minus screwdriver, turn it counterclockwise by 90° until it hits the stopper.
Digital Inverter 7 Digital Inverter ELECTRICAL WORK • WARNING 1. Using the specified wires, ensure that the wires are connected, and fix wires securely so that the external tension to the wires does not affect the connecting part of the terminals. Incomplete connection or fixation may cause a fire, etc. 2. Be sure to connect the earth wire (grounding work). Incomplete grounding may lead to electric shock.
Digital Inverter Digital Inverter Stripping length power cord and connecting wire Indoor/outdoor connecting wire Power supply wire 10 1 2 3 10 10 Earth screw 1 2 3 Earth screw L1 L2 L3 10 30 50 40 (mm) Earth line Earth line Connecting wire Cord clamp FINISHING After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and clamp them to the wall with off-the-shelf support brackets or their equivalent.
Digital Inverter Digital Inverter 13 FUNCTIONS TO BE IMPLEMENTED LOCALLY 14 TROUBLESHOOTING • • • • Do not reuse a flare nut to prevent gas leaks. Replace it with the supplied flare nut and then process it to a flare. Blow nitrogen gas or use an appropriate means to keep the inside of the pipe clean. If discolored oil or much residue is discharged, wash the pipe. Check welds, if any, on the pipe for gas leaks.
Digital Inverter Digital Inverter No. Display mode 1 Cause Display mode 2 15 APPENDIX D800 D801 D802 D803 D804 D800 D801 D802 D803 D804 1 Normal Work instructions 2 Discharge (TD) sensor error 3 Heat exchanger (TE) sensor error The existing R22 and R407C piping can be reused for our digital inverter R410A product installations.
Digital Inverter Are there scratches or dents on the existing pipes? YES Existing pipes: Cannot be used. • Use new pipes. NO Is it possible to operate the existing air conditioner? NO YES • After the existing air conditioner is operated in cooling mode for approx. 30 minutes or longer,* recover the refrigerant. • For cleaning the pipes and recovering oil • Refrigerant recovery: Refrigerant recovery equipment Nitrogen gas pressure 0.
12. REPLACEMENT OF THE SERVICE P.C. BOARD (4316V392) MCC-1599 1. Setting the jumper wires and DIP switches Part name Setting Function J800 to J803 Model switching Cut these jumper wires according to the following table. J804 to J811 Settings Set these jumper wires to the settings of the P.C. board before replacement SW802 Settings Set SW802 to the setting of the P.C. board before replacement SW803 LED indication switching Set SW803 to all OFF.
13. HOW TO EXCHANGE COMPRESSOR 13-1. Exchanging Procedure of Compressor (Outline) START Has refrigerant recovery work been done? NO Open PMV forcedly and then recover refrigerant using a refrigerant recovery unit. YES Turn off the leakage breaker. Remove the defective compressor. Mount a service compressor. Never recover the refrigerant to the outdoor unit. For the refrigerant recovery work during reinstallation of repair work, be sure to use the refrigerant recovery unit.
14. DETACHMENTS 14-1. Outdoor Unit RAV-SM224, RAV-SM280 series No. 1 Procedure Part name Common procedure Remarks WARNING Service panel Stop operation of the air conditioner and turn off breaker switch. CAUTION Ensure wearing of gloves when performing any work in order to avoid injury from parts, etc. 1. Detachment 1) Remove the service panel. (Hexagonal screws Ø4 × 10, 3 pcs.) • Remove the screws and then pull service panel downward to remove.
No. Part name 3 Discharge port cabinet Remarks Procedure 1. Detachment 1) Carry out the operation in 1. of Q and 1. of R above. 2) Remove the screws fixing the inverter assembly, the discharge port cabinet and the partition board. (ST1T Ø4 × 8, 4 pcs.) 3) Remove the screws for the discharge port cabinet and the bottom plate. (Hexagonal screw Ø4 × 10, 2 pcs.) 4) Remove screw for the discharge port cabinet and heat exchanger. (ST1T Ø4 × 8, 1 pc.
No. Part name 4 Side cabinet Remarks Procedure 1. Detachment 1) Carry out the operation in 1. of Q and 1. of R above. 2) Remove the screws fixing the inverter assembly and the side cabinet. (ST1T Ø4 × 10, 3 pcs.) 3) Remove the screws for the side cabinet and the valve fixing plate. (ST1T Ø4 × 10, 2 pcs.) 4) Remove screw for the side cabinet and piping panel (rear). (Hexagonal screw Ø4 × 10, 1 pc.) 5) Remove screw for the side cabinet and the bottom plate. (Hexagonal screw Ø4 × 10, 1 pc.
No. Part name 5 Inverter assembly Remarks Procedure 1. Detachment 1) Carry out the operation in 1. of Q, 1. of R and 1. of T above. 2) Remove the connectors connected to the fan motor relay board and the Fan IPDU board, the connector connected to other components from the control board (Interface board).
No. 6 Part name Interface board (Control board) MCC-1599 Procedure Remarks 1. Detachment 1) Carry out the operation in 1. of Q, 1. of R and 1. of T above. 2) Remove lead wires and connectors to other components from the interface board (control board).
No. Part name 7 Fan-IPDU board MCC-1597 Procedure Remarks 1. Detachment FAN-IPDU board 1) Carry out the operation in 1. of Q, 1. of R and 1. of T above. 2) Remove lead wires and connectors to other components from the Fan-IPDU board.
No. Part name 8 Noise filter board MCC-1600 Remarks Procedure 1. Detachment 1) Perform the operation in 1. of Q, 1. of R, 1. of T, 1.-2 of V and 1.-2 of W. 2) Remove the screws (4 positions) fixing the inverter assembly (front) to remove the lead wires from the upper left clamp. Then slide the inverter assembly (front) upwardly and remove. 3) Remove the lead wires connector to other components from the noise filter board.
No. Part name 9 Compressor IPDU board MCC-1596 Procedure Remarks 1. Detachment 1) Carry out the operation in 1. of Q, 1. of R, 1. of T, 1. of V, 1. of W and 1. of X. 2) Pull the compressor lead from the space in the partition plate. 3) Remove the screw (1 position) fixing the discharge port cabinet and the screws (4r positions) fixing the inverter assembly (IPDU) and then remove the lead wire from the top clamp.
No. Part name 10 Fan motor Procedure Remarks 1. Detachment 1) Carry out the operation in 1. of Q , 1. of R and 1. of S above. 2) Remove the flange nut fixing the fan motor and the propeller fan. • The flange nut is loosened by turning to the right. (When tightening, turn it to the left) 3) Remove the propeller fan. 4) Remove the connector for the fan motor from the inverter. 5) Remove the fan motor lead from the fan motor lead fixing rubber member of the through section of the partitioning board.
No. Part name 11 Compressor Procedure Remarks 1. Detachment 1) Recover the refrigerant gas. 2) Carry out the operation in 1. of Q and T above. 3) Remove the piping panel (front). Remove the piping panel (front) and screws of the bottom plate. (Hexagonal screw Ø4 × 10, 2 pcs.) Remove screw of the piping panel (front) and the piping panel (rear). (Hexagonal screw Ø4 × 10, 1 pc.) 4) Remove the piping panel (rear). Remove the piping panel (rear) and screws of the bottom plate.
No. Part name 11 Compressor (continued) Procedure Remarks 2. Attachment 1) Mount the compressor by reversing the procedure for removal. CAUTION The fixing torque for the hexagonal bolts fixing the compressor is 19.6N•m (200kgf•cm). 3. Vacuuming 1) Connect the vacuum pump to the charge port and the high-pressure check joint of the liquid pipe and the gas pipe valve and then operate the vacuum pump. 2) Carry out vacuuming until the vacuum low pressure gauge indicates 1 (mmHg).
No. Part name 13 Fan guard Remarks Procedure 1. Detachment 1) Carry out work of item 1. of Q and 1. of S above. Remover screw (2 pcs.) CAUTION To prevent scratches to the product, carry out the work on cardboard, cloth, etc. 2) Remove the discharge port cabinet and place the fan guard side facing upwards. 3) Remove the fixing screws for the fan guard. (Hexagonal screws Ø4 × 10, 2 pcs.) 4) Remove the discharge port cabinet and then put on it so that the fan guard side faces downward.
15. EXPLODED VIEWS AND PARTS LIST 15-1.
Location No. Part No.
15-2.
Model name Location No. Part No.
15-3.
Location No. Part No.
15-4.
Model name Location No. Part No.
WARNINGS ON REFRIGERANT LEAKAGE Important Check of Concentration Limit The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit. The refrigerant R410A which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer.
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