User manual TOSHIBA RAS-18UA-ES2 SERVICE MANUAL

[. . . ] SVM-03009 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 RAS-18UKHP-ES2 / RAS-18UAH-ES2 RAS-24UKP-ES-1 / RAS-24UA-ES-1 RAS-18UKP-ES2 / RAS-18UA-ES2 18 Class (Heat pump model) 18 Class (Cooling only model) 24 Class Feb. , 2003 FILE NO. SPECIFICATIONS CONSTRUCTION VIEWS 2-1 2-2 2-3 2-4 Indoor Unit Outdoor Unit (RAS-24UAH-ES-1, RAS24UA-ES-1) Outdoor Unit (RAS-18UAH-ES2) Outdoor Unit (RAS-18UA-ES2) RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 RAS-18UKHP-ES2 / RAS-18UAH-ES2 RAS-24UKP-ES-1 / RAS-24UA-ES-1 RAS-18UKP-ES2 / RAS-18UA-ES2 Indoor Unit (RAS-24UKHP-ES-1, RAS-18UKHP-ES2) Outdoor Unit (RAS-24UAH-ES-1) Outdoor Unit (RAS-18UAH-ES2) Indoor Unit (RAS-24UKP-ES-1, RAS-18UKP-ES2) Outdoor Unit (RAS-24UA-ES-1) Outdoor Unit (RAS-18UA-ES2) RAS-24UKHP-ES-1 / RAS-24UAH-ES-1 RAS-18UKHP-ES2 / RAS-18UAH-ES2 RAS-24UKP-ES-1 / RAS-24UA-ES-1 RAS-18UKP-ES2 / RAS-18UA-ES2 3. WIRING DIAGRAM 3-1 3-2 3-3 3-4 4. SPECIFICATION OF ELECTRICAL PARTS 4-1 4-2 4-3 4-4 4-5 4-6 5. REFRIGERATION CYCLE DIAGRAM 5-1 5-2 5-3 5-4 6. CONTROL BLOCK DIAGRAM 6-1 RAS-24UKHP-ES-1, RAS-18UKHP-ES2 6-2 RAS-24UKP-ES-1, RAS-18UKP-ES2 7. OPERATION DESCRIPTION 7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8 Outline of Air Conditioner Control Description of Operation Circuit Hi POWER Mode High-Temperature Limit Control Low-Temperature Limit Control Defrosting Operation Auto Restart Function Filter Check Lamp Safety Cautions Installation Diagram of Indoor and Outdoor Units Installation Indoor Unit Outdoor Unit Others 8. INSTALLATION PROCEDURE 8-1 8-2 8-3 8-4 8-5 8-6 ­1­ FILE NO. TROUBLESHOOTING CHART 9-1 9-2 9-3 9-4 9-5 9-6 9-7 9-8 9-9 10-1 10-2 10-3 10-4 11-1 11-2 11-3 11-4 11-5 11-6 Troubleshooting Procedure Basic Check Items Primary Judgement Self-Diagnosis by Remote Control (Check Code) How to Diagnose Faulty Part Troubleshooting for Indoor Unit Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire) Troubleshooting for P. C. Board Troubleshooting for Remote Control Indoor Unit Outdoor Unit (RAS-24UAH-ES-1, RAS-24UA-ES-1) Outdoor Unit (RAS-18UAH-ES2) Outdoor Unit (RAS-18UA-ES2) Indoor Unit (E - Parts Assy) Indoor Unit Outdoor Unit (RAS-24UAH-ES-1) Outdoor Unit (RAS-18UAH-ES2) Outdoor Unit (RAS-24UA-ES-1) Outdoor Unit (RAS-18UA-ES2) 10. [. . . ] of copper pipe 6. 35 9. 52 12. 70 R410A tool used 0 to 0. 5 0 to 0. 5 0 to 0. 5 Conventional tool used 1. 0 to 1. 5 1. 0 to 1. 5 1. 0 to 1. 5 Imperial (wing nut type, conventional tool) Outer dia. of copper pipe 6. 35 9. 52 12. 70 <Tightening connection> Align the centers of the connecting pipes and tighten the flare nut as far as possible with your fingers. Then tighten the nut with a spanner and torque wrench as shown in the figure. R410A 1. 5 to 2. 0 1. 5 to 2. 0 2. 0 to 2. 5 Strong wind CAUTION · Do not apply excess torque. · Otherwise, the nut may crack depending on the conditions. Fig. of copper pipe 6. 35 mm 9. 52 mm 12. 70 mm Tightening torque 16 to 18 (1. 6 to 1. 8 kgf·m) 30 to 42 (3. 0 to 4. 2 kgf·m) 50 to 62 (5. 0 to 6. 2 kgf·m) AIR PURGE Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. <Using a vacuum pump> Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops. (If oil inside of the vacuum pump enters into the air conditioner, which use R410A, refrigeration cycle trouble may result. ) 1. Connect the charge hose from the manifold valve to the service port of the gas side packed valve. Perform evacuating for about 15 minutes if the piping length is 20 meters. (15 minutes for 20 meters) (assuming a pump capacity of 27 liters per minute. Then confirm that the compound pressure gauge reading is ­101 kPa (­76 cmHg). Open fully the valve stem of the packed valves (both side of Gas and Liquid). Securely tighten the caps on the packed valves. Compound pressure gauge -101kPa (-76cmHg) Manifold valve Handle Lo Charge hose (For R410A only) Connecting pipe Handle Hi (Keep full closed) Charge hose (For R410A only) Pressure gauge After the piping has been connected to the indoor unit, you can perform the air purge together at once. · Tightening torque of flare pipe connections The operating pressure of R410A is higher than that of R22. It is therefore necessary to firmly tighten the flare pipe connecting sections (which connect the indoor and outdoor units) up to the specified tightening torque. Incorrect connections may cause not only a gas leakage, but also damage to the refrigerant cycle. Flare at indoor unit side Flare at outdoor unit side Fig. 8-5-4 Half union Flare nut Externally threaded side Internally threaded side Use a wrench to secure. Use a torque wrench to tighten. Fig. 8-5-5 CAUTION · KEEP IMPORTANT 4 POINTS FOR PIPING WORK (1) Take away dust and moisture (Inside of the connecting pipes. ) (2) Tight connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using VACUUM PUMP. (4) Check gas leak (connected points) Vacuum pump adapter for counter-flow prevention (For R410A only) Vacuum pump Packed valve at gas side Service port (Valve core (Setting pin)) Packed valve at liquid side Fig. SVM-03009 TO CHARGE REFRIGERANT Refrigerant RAS-24UKHP-ES-1/24UAH-ES-1 RAS-18UKHP-ES2/18UAH-ES2 RAS-24UKP-ES-1/24UA-ES-1 RAS-18UKP-ES2/18UA-ES2 8-5-4. Connect the connecting cable to the terminal as identified with their respective matched numbers on the terminal block of indoor and outdoor unit. When connecting the connecting cable to the outdoor unit terminal, make a loop as shown in the installation diagram of indoor and outdoor unit, to prevent water coming in the outdoor unit. [. . . ] Board after unhooking 4 clams. Running capacitor for compressor Running capacitor for fan motor 3 Running capacitor for fan motor 4 Relay 5 Transformer P. C. SVM-03009 10-4 Outdoor Unit (RAS-18UA-ES2) No. 1 Part name Common procedure Procedures 1) Stop the operation of the air conditioner and turn off its main power supply or remove the power supply cord. (2 screws 4 x 10L) 3) Remove 2 cord clamps (4 screws 4 x 22L) and disconnect the power supply cord and connecting cable after removing 6 screws on the terminal block and 1 ground screw on the electrical parts base. (8 scerws 4 x 10L) (Pull the front lower portion toward you, and pull out it upward to remove it. ) 5) Remove the back cabinet. [. . . ]