User manual TOSHIBA RAS-18UKHP-ES4 SERVICE MANUAL

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Manual abstract: user guide TOSHIBA RAS-18UKHP-ES4SERVICE MANUAL

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[. . . ] SVM-05011 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-24UKHP-ES4 / RAS-24UAH-ES4 RAS-18UKHP-ES4 / RAS-18UAH-ES4 RAS-24UKP-ES4 / RAS-24UA-ES4 RAS-18UKP-ES4 / RAS-18UA-ES4 18 Class (Heat pump model) 18 Class (Cooling only model) 24 Class May 2005 FILE NO. SPECIFICATIONS CONSTRUCTION VIEWS 2-1 2-2 2-3 2-4 Indoor Unit Outdoor Unit (RAS-24UAH-ES4, RAS-24UA-ES4) Outdoor Unit (RAS-18UAH-ES4) Outdoor Unit (RAS-18UA-ES4) RAS-24UKHP-ES4 / RAS-24UAH-ES4 RAS-18UKHP-ES4 / RAS-18UAH-ES4 RAS-24UKP-ES4 / RAS-24UA-ES4 RAS-18UKP-ES4 / RAS-18UA-ES4 Indoor Unit (RAS-24UKHP-ES4, RAS-18UKHP-ES4) Outdoor Unit (RAS-24UAH-ES4) Outdoor Unit (RAS-18UAH-ES4) Indoor Unit (RAS-24UKP-ES4, RAS-18UKP-ES4) Outdoor Unit (RAS-24UA-ES4) Outdoor Unit (RAS-18UA-ES4) RAS-24UKHP-ES4 / RAS-24UAH-ES4 RAS-18UKHP-ES4 / RAS-18UAH-ES4 RAS-24UKP-ES4 / RAS-24UA-ES4 RAS-18UKP-ES4 / RAS-18UA-ES4 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-ES4, RAS-18UKHP-ES4 6-2 RAS-24UKP-ES4, RAS-18UKP-ES4 7. OPERATION DESCRIPTION 7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8 7-9 Outline of Air Conditioner Control Description of Operation Circuit Hi POWER Mode High-Temperature Limit Control Low-Temperature Limit Control Defrost Operation Auto Restart Function Filter Check Lamp Self-Cleaning function 7-10 QUIET Mode 7-11 COMFORT SLEEP mode -1- FILE NO. INSTALLATION PROCEDURE 8-1 8-2 8-3 8-4 8-5 8-6 8-7 Safety Cautions Installation Diagram of Indoor and Outdoor Units Installation Indoor Unit Outdoor Unit How to Set Remote Control Selector Switch Others 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-ES4, RAS-24UA-ES4) Outdoor Unit (RAS-18UAH-ES4) Outdoor Unit (RAS-18UA-ES4) Indoor Unit (E - Parts Assy) Indoor Unit Outdoor Unit (RAS-24UAH-ES4) Outdoor Unit (RAS-18UAH-ES4) Outdoor Unit (RAS-24UA-ES4) Outdoor Unit (RAS-18UA-ES4) 9. 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 10. [. . . ] Operate the vacuum pump to start evacuating. 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). Close the low pressure side valve handle of gauge manifold. Open fully the valve stem of the packed valves (both side of Gas and Liquid). Remove the charging hose from the service port. 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-05011 TO CHARGE REFRIGERANT Refrigerant No need to charge refrigerant Need to charge refrigerant 24 Class 15 m or les s Over 15 m up to 25 m (20g/m) 18 Class 15 m or les s Over 15 m up to 20 m (20g/m) 8-5-4. Remove the valve cover from the outdoor unit. 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. Insulate the unused cords (conductors) from any water coming in the outdoor unit. Proceed them so that they do not touch any electrical or metal parts. <Stripping length of connecting cable> Terminal block <Packed valve handling precautions> · Open the valve stem all the way out; but do not try to open it beyond the stopper. · Securely tighten the valve stem cap with torque in the following table: Gas side (12. 70 mm) Gas side (9. 52 mm) Liquid side (6. 35 mm) Service port 50 to 62 N·m (5. 0 to 6. 2 kgf·m) 30 to 42 N·m (3. 0 to 4. 2 kgf·m) 16 to 18 N·m (1. 6 to 1. 8 kgf·m) 9 to 10 N·m (0. 9 to 1. 0 kgf·m) Hexagonal wrench is required. 4m m L N 1 2 3 Terminal screw Cord clamp Earth line Screw Cord clamp Power supply cord Connecting cable LN 10 12 3 10 10 70 70 10 80 60 Fig. 8-5-7 Power supply cord Earth line Connecting cable Fig. [. . . ] 1) Perform the common procedure 1 2) Remove the fixing screw. (1 screw 4 x 10L) 3) Disconnect the lead wires from the capacitor terminal. 1) Perform the common procedure 1 2) Remove the fixing screw. (2 screws 4 x 10L) 3) Disconnect the lead wires from the terminal. [. . . ]

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