Toshiba RAS-18N3AV2-E Page 80 Service Manual Download

Page: 80 / 108

11-7. How to Diagnose Trouble in Outdoor Unit

YES

Turn ON the unit

by remote controller

and wait for 3 min.

Check component

parts of control board

assembly by visual.

(damage, burn,.. Etc.)

Check Power Supply

(Voltage Rate ±10%)

Replace
fuse.

YES

Turn OFF power

supply.

Check 25A

fuse (F01)

failure?

Remove connector

of compressor.

Replace
control board.

Check terminal

Voltage of electrolytic

capacitor are in

(Voltage Rate

Turn ON power

Supply.

±10%) x 1.414?

Replace
control board.

(Cooling : 17°C)

•

Connect discharge
resistance (approx. 100

Ω

40W) or soldering iron
(plug) b, –
terminals of the electro-
lytic capacitor (500

F )

of C14 (with printed
CAUTION HIGH VOLTAGE)
on P.C. board.

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering
iron

FILE NO. SVM-12056

–

Summary of Contents for RAS-18N3AV2-E

Page 1: ...ER SPLIT TYPE SERVICE MANUAL FILE NO SVM 12056 Outdoor Unit Heat Pump Type RAS 18N3AV2 E RAS 22N3AV2 E Indoor Unit High Wall Heat Pump Type RAS 18N3KV2 E RAS B22N3KV2 E POWER SEL SWING FAN FIX QUIET HiPOWER ONE TOUCH COM FOR T SLEE P ...

Page 2: ... WIRING DIAGRAM 17 6 SPECIFICATIONS OF ELECTRICAL PARTS 19 7 REFRIGERANT CYCLE DIAGRAM 20 8 CONTROL BLOCK DIAGRAM 23 9 OPERATION DESCRIPTION 25 10 INSTALLATION PROCEDURE 49 11 HOW TO DIAGNOSE THE TROUBLE 64 12 HOW TO REPLACE THE MAIN PARTS 86 13 EXPLODED VIEWS AND PARTS LIST 102 FILE NO SVM 12056 1 ...

Page 3: ... EXPLOSION TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD PLACE THE UNIT WELL AWAY MORE THAN 2 M FROM HEAT SOURCES SUCH AS RADIATORS HEATERS FURNACE STOVES ETC WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN BE VERY CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT R410A WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE IF AIR OR ANY OTHER GAS IS MIXED ...

Page 4: ...t where flammable gas may leak It there is any gas leakage or accumulation around the unit it can cause a fire Do not select a location for installation where there may be excessive water or humidity such as a bathroom Deterioration of insulation may cause elestrical shock or fire Installation work must be performed following the instructions in this installation manual Improper installation may c...

Page 5: ... Ensure that drained water is discharged Improper drainage can result in water leakage causing water damage to furniture Tighten the flare nut with a torque wrench using the prescribed method Do not apply excess torque Otherwise the nut may crack after a long period of usage and it may cause the leakage of refrigerant Wear gloves heavy gloves such as cotton gloves for installation work Failure to ...

Page 6: ... chargeless length m Maximum height difference m Refrigerant Name of refrigerant Weight kg Wiring connection Power supply Interconnection Usable temperature range Indoor Cooling Heating o C Outdoor Cooling Heating o C Accessary Indoor unit Installation plate Wireless remote controller Batteries Batteries cover Remote controller holder Toshiba New IAQ filter Long Mounting screw Pan head wood screw ...

Page 7: ...Characteristic Curve Cooling Heating 2 3 Capacity Variation Ratio According to Temperature Cooling Heating FILE NO SVM 12056 0 00 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 9 00 10 00 0 10 20 30 40 50 60 70 80 90 100 110 120 Compressor Speed RPS Current A 0 00 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 9 00 10 00 0 10 20 30 40 50 60 70 80 90 100 110 120 Compressor Speed RPS Current A RAS 18N3KV2 E RAS 1...

Page 8: ... the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused 5 After completion of installation work check to make sure that there is no refrigeration gas leakage If the refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 6 When an air conditioning system charged with a large...

Page 9: ...er or dust does not enter the pipe interior that no other oil than lubricating oils used in the installed air water heat pump is used and that refrigerant does not leak When using lubricating oils in the piping processing use such lubricating oils whose water content has been removed When stored be sure to seal the container with an airtight cap or any other cover 1 Flare processing procedures and...

Page 10: ... diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 A mm Flare tool for R22 clutch type 0 to 0 5 0 to 0 5 0 to 0 5 0 to 0 5 Conventional flare tool Clutch type Wing nut type 0 5 to 1 0 1 0 to 1 5 0 5 to 1 0 1 0 to 1 5 0 5 to 1 0 1 5 to 2 0 0 5 to 1 0 1 5 to 2 0 Nominal Outer diameter Thickness diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 Dimension mm A B C...

Page 11: ...7 shows reference values NOTE When applying oil to the flare surface be sure to use oil designated by the manufacturer If any other oil is used the lubricating oils may deteriorate and cause the compressor to burn out Table 3 2 7 Tightening torque of flare for R410A Reference values Nominal Outer diameter Thickness diameter mm mm 1 4 6 35 0 8 3 8 9 52 0 8 1 2 12 70 0 8 5 8 15 88 1 0 3 4 19 05 1 0 ...

Page 12: ...e tools exclusive for R410A and their interchangeability Tools exclusive for R410A The following tools for R410A are required Tools whose specifications are changed for R410A and their interchangeability Note 1 When flaring is carried out for R410A using the conventional flare tools adjustment of projection margin is necessary For this adjustment a copper pipe gauge etc are necessary Note 2 Chargi...

Page 13: ...e connecting port of the electronic balance and charge liquid refrigerant Indoor unit Outdoor unit Opened Opened Refrigerant cylinder with siphon Check valve Open close valve for charging Electronic balance for refrigerant charging Opened Closed Service port 3 4 Recharging of Refrigerant When it is necessary to recharge refrigerant charge the specified amount of new refrigerant according to the fo...

Page 14: ...silver and copper It is used to join iron copper or copper alloy and is relatively expensive though it excels in solderability 2 Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy 3 Low temperature brazing filler Low temperature brazing filler is generally called solder and is an alloy of tin and lead Since it is weak in adhesive strength...

Page 15: ...ux which does not contain chlorine 3 When adding water to the flux use water which does not contain chlorine e g distilled water or ion exchange water 4 Remove the flux after brazing 3 5 3 Brazing As brazing work requires sophisticated techniques experiences based upon a theoretical knowledge it must be performed by a person qualified In order to prevent the oxide film from occurring in the pipe i...

Page 16: ...lle Inlet 132 150 200 222 200 278 525 Drain hose 0 5m Hanger Hanger Connecting pipe 0 39m Flare 6 35 Flare 12 70 Connecting pipe 0 49m 786 262 5 262 5 235 215 215 235 320 6 5 40 47 85 6 5 40 23 109 215 5 153 5 Hanger Installation plate outline Hanger Hanger Outline of indoor unit For stud bold 6 For stud bold 8 10 Center line 63 Remote controller holder 17 5 149 57 Wireless remote controller 172 1...

Page 17: ...Flare 6 35 Ø Flare 12 7 Gas side Service port 2 11 x 14 Long holes For 8 10 anchor bolt Installation dimension Air outlel 100 or more 100 or more 600 or more 600 or more Air intlel Ø Ø Ø Ø6 hole 86 Ø6 hole Ø11x14 hole R15 28 A 320 R5 5 36 108 125 50 137 92 5 4 600 320 90 600 90 275 290 550 Ø 436 Z R15 50 36 2 320 342 69 2 R5 5 x 17L Ushape For 8 10 anchor bolt FILE NO SVM 12056 16 ...

Page 18: ...Surge Absorber F01 Fuse 250V T25A Power Relay Relay DB01 DB02 C12 C14 C13 YEL P21 BRW P20 R220 R219 PMV Discharge pipe Temp Sensor TD 3 2 1 3 2 1 Condenser pipe Temp Sensor TE 2 1 2 1 Thermo Sensor TA 1 2 1 2 CN62 BLU Heat Exchanger Sensor TC 1 2 1 2 CN01 CN02 CN51 Outdoor Temp Sensor TO 2 1 2 1 R321 R320 R319 P19 P18 Reactor Reactor Coil for 4 way Valve Indoor Terminal Block Wireless Unit Assembl...

Page 19: ...r Surge Absorber F01 Fuse 250V T25A Power Relay Relay DB01 DB02 C12 C14 C13 YEL P21 BRW P20 R220 R219 PMV Discharge pipe Temp Sensor TD 3 2 1 3 2 1 Condenser pipe Temp Sensor TE 2 1 2 1 Thermo Sensor TA 1 2 1 2 CN62 BLU Heat Exchanger Sensor TC 1 2 1 2 CN01 CN02 CN51 Outdoor Temp Sensor TO 2 1 2 1 R321 R320 R319 P19 P18 Reactor Reactor Coil for 4 way Valve Indoor Terminal Block Wireless Unit Assem...

Page 20: ...p sensor TO sensor Heat exchanger temp sensor TE sensor Model name CH 57 Z T ICF 140 43 4R Inverter attached Inverter attached Inverter attached Inverter attached L 10mH 16A DC140V 43W 10kΩ 25 C 62kΩ 20 C 3 3kΩ 100 C 10kΩ 25 C 10kΩ 25 C 7 8 9 10 DA150A1F 20F CAM MD12TCTH 5 Rating 20A AC250V 3phases 4poles 1100W DC12V AC220 240V Terminal block 5P Compressor Coil for PMV Coil for 4 way valve JXO 5B ...

Page 21: ...at exchanger Cross flow fan Sectional shape of heat insulator Allowable height difference 10m Allowable pipe length P Pressure measurement Gauge attaching port Vacuum pump connecting port Strainer Pulse Modulating valve at liquid side CAM BD16TCTH 2 TD 4 way valve STF 0108 Z Compressor DA131S1B 31FZ Propeller fan Refrigerant amount 1 40kg OUTDOOR UNIT TC TA Outdoor heat exchanger Split capillary 2...

Page 22: ...position Refrigerant flow Cooling Refrigerant flow Heating OUTDOOR UNIT INDOOR UNIT T1 Temp measurement Indoor heat exchanger Cross flow fan TC TA Deoxidized copper pipe Outer dia 12 7mm Thickness 0 8mm Sectional shape of heat insulator P Pressure measurement Gauge attaching port Vacuum pump connecting port Deoxidized copper pipe Outer dia 6 35mm Thickness 0 8mm TD 4 way valve STF 0213 Z Compresso...

Page 23: ... Tempeature Standard Heat exchanger Indoor Outdoor Compressor condition C pressure pipe temp fan mode fan mode revolution Indoor Outdoor P MPa T1 C T2 C rps 20 15 7 6 18N3KV2 E 2 5 to 2 6 40 to 42 1 to 3 79 B22N3KV2 E 2 6 to 2 8 42 to 44 0 to 2 84 NOTES 1 Measure surface temperature of heat exchanger pipe around center of heat exchaner path U bent Thermistor themometer 2 Connecting piping conditio...

Page 24: ...mer Serial Signal Communication Clean Function Heat Exchanger Sensor TC Room Temperature Sensor TA Infrared Rays Signal Receiver and Indication Initializing Circuit Power Supply Circuit Converter D C circuit Noise Filter Clock Frequency Oscillator Circuit M C U Power Supply From Outdoor Unit Serial Signal Transmitter Receiver Serial Signal Communication Operation Command and Information Indoor Uni...

Page 25: ...end receive circuit Noise Filter MCC5009 PCB PWM synthesis function Input current release control IGBT over current detect control Outdoor fan control High power factor correction control Inverter output frequency control A D converter function PMV control Discharge temp control 4 way valve control Signal communication to indoor unit PMV Pulse Motor Valve MCU Micro Controller Unit Outdoor Fan moto...

Page 26: ...or unit controller Receiving the operation command signal Serial signal from the indoor unit controller the outdoor unit performs its role Compressor operation control Operation control of outdoor fan motor PMV control 4 way valve control Detection of inverter input current and current release operation Over current detection and prevention operation to IGBT module Compressor stop function Compres...

Page 27: ...peration 36 10 Temporary operation 37 11 Discharge temperature control 37 FILE NO SVM 12056 12 Pulse motor valve PMV control 38 13 Self Cleaning function 39 14 Remote Controller A or B selection 40 15 QUIET mode 41 16 COMFORT SLEEP 41 17 Short Timer 41 18 One Touch Comfort 42 19 Hi POWER Mode 42 20 FILTER Indicator 42 9 3 Auto Restart Function 9 3 1 How to Set the Auto Restart Function 43 9 3 2 Ho...

Page 28: ...ation select COOL HEAT AUTO DRY Temperature setup Air direction Swing Air volume select AUTO LOW LOW MED MED HIGH ECO COMFORT SLEEP ON timer setup QUIET OFF timer setup PRESET Hi POWER ONE TOUCH Indoor unit control Command signal generating function of indoor unit operation Calculation function temperature calculation Activation compensation function of indoor fan Cold draft preventive function Ti...

Page 29: ...led in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons Description 1 Detects the room temperature Ta when the operation started 2 Selects an operation mode from Ta in the left figure 3 Fan operation continues until an operation mode is selected 4 When AUTO operation has started within 2 hours after heating operation stopped and if the room t...

Page 30: ...to L L M M or H on the remote controller the operation is performed with the constant speed shown in Fig 1 2 When setting the fan speed to AUTO on the remote controller revolution of the fan motor is controlled to the fan speed level shown in Fig 2 and Table 1 according to the setup tempera ture room temperature and heat exchanger temperature Fig 1 FILE NO SVM 12056 Table 1 Indoor fan air flow rat...

Page 31: ...nt speed shown in Fig 3 and Table 1 2 When setting the fan speed to AUTO on the remote controller revolution of the fan motor is controlled to the fan speed level shown in Fig 5 according to the set temperature and room temperature 3 Min air flow rate is controlled by temperature of the indoor heat exchanger Tc as shown in Fig 4 4 Cold draft prevention the fan speed is controlled by temperature of...

Page 32: ...e fan is locked 4 According to each operation mode by the conditions of outdoor temperature To and compressor revolution the speed of the outdoor fan shown in the table is selected In cooling operation Compressor speed rps To To To During ECO QUIET and comfort sleep When To is abnormal 22 1 50 3 50 3 MIN MAX MIN MAX MIN MAX f 6 f 9 f 8 f B f A f E f 5 f 9 f 7 f B f 9 f E f 3 f 7 f 5 f 9 f 7 f B f ...

Page 33: ...ircuit of the compressor speed so that electric power of the compressor drive circuit does not exceed the specified value Description 1 The difference between set temperature on remote controller Ts and room temperature Ta is calculated 2 According to the temperature difference the correction value of Hz signal which determines the compressor speed is set up 3 The rotating position and speed of th...

Page 34: ...emperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value Description 1 When temperature of the indoor heat exchanger drops below 5 C the compressor speed is re duced P zone 2 When temperature of the indoor heat exchanger rises in the range from 6 C to under 7 C the compressor speed is kept Q zone 3 When temperature of the indoor hea...

Page 35: ...s 1 Stop operation of the compressor for 20 seconds 2 Invert ON 4 way valve 10 seconds after stop of the compressor 3 The outdoor fan stops at the same time when the compressor stops 4 When temperature of the indoor heat exchanger becomes 38 C or lower stop the indoor fan Finish of defrost operation Returning conditions from defrost operation to heating operation 1 Temperature of outdoor heat ex c...

Page 36: ... mode COOL HEAT The set louver position is stored in memory by the microcomputer and the louver returns to the stored position when the next operation is performed Cooling heating memory position The angle of the louver is indicated as the horizontal angle is 0 1 Louver position in cooling operation 2 Louver position in heating operation Swing operation is performed in width 35 with the stop posit...

Page 37: ...ax FAN Min Hz Fan speed depend on presetting and can change every speed 6 5 6 0 5 5 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 TSC 0 5 1 0 2 0 A B C A B C 0 5 0 1 0 1 5 2 0 2 5 3 0 4 0 5 0 5 5 11 0 11 5 Room temp Set temp Compressor speed 0Hz A zone aHz B zone a to cHz C zone cHz 30 minutes Time FILE NO SVM 12056 12 DRY max COOL min 6 5 COOL min 11 DRY max COOL min 6 4 COOL min 10 DRY max COOL min 6 ...

Page 38: ...re Pi sound is heard and the temporary COOL operation starts 4 If the filter lamp goes on push RESET button to go off the filter lamp and then push RESET button again 5 To stop the temporary operation push the button again FILE NO SVM 12056 11 Discharge temperature control Td value 117 C 112 C 108 C 105 C 98 C Control operation Judges as an error and stops the compressor Reduce the compressor spee...

Page 39: ...e open degree of valve by super heat amount SH control 3 If the discharge temperature was excessively up adjust the open degree of valve so that it is in the range of set temperature Discharge temp control 4 When defrost operation is performed the open degree of valve is adjusted according to each setup conditions during preparation for defrost or during defrost operation 4 way valve is inversed 5...

Page 40: ...specified period based on duration of the operation which was performed prior to the shutdown after which the Self Cleaning operation stops The Self Cleaning operation is not performed after a heating operation 2 Operation 1 When the stop signal from the remote controller or timer off function is received only the timer indicator light 2 The period of the Self Cleaning operation is determined by t...

Page 41: ...ting display Setting the remote controller To separate using of remote controller for each indoor unit in case of 2 air conditioner are installed nearly Remote Controller B Setup 1 Push RESET button on the indoor unit to turn the air conditioner ON 2 Point the remote controller at the indoor unit 3 Push and hold CHK button on the Remote Controller by the tip of the pencil 00 will be shown on the d...

Page 42: ...epeat pushing to select the hours 1hr 3hr 5hr or 9hr If the COMFORT SLEEP button is pushed again means cancel comfort sleep mode Heating mode The preset temperature will drop down as shown on ECO operation Item No 9 Push the COMFORT SLEEP button to choose the operating hours Repeat pushing to setect the hours 1hr 3hr 5hr or 9hr If the COMFORT SLEEP button is pushed again means cancel comfort sleep...

Page 43: ...n Auto Cooling or Heating operation Hi POWER mark is indicated on the display of the remote controller and the unit operates as follows 1 Automatic operation The indoor unit operates in according to the current operation 2 Cooling operation The preset temperature drops 1 degree The value of the preset temperature on the remote controller does not change The indoor unit s fan speed level increases ...

Page 44: ... being accidentally shut down When the unit is stand by Not operating When the unit is in operation Operation Push RESET button for more than 3 seconds Less than 10 seconds Motions The unit is in operation The green indicator is on The unit stops operating The green indicator is turned off After approx 3 seconds The unit beeps 3 times The green indicator flashes for 5 seconds If the unit is requir...

Page 45: ...push RESET button once more or use the remote controller to turn it off When the system is operating Operation Push RESET button for more than 3 seconds Less than 10 seconds Motions The unit is in operation The green indicator is on The unit stops operating The green indicator is turned off After approx 3 seconds The unit beeps 3 times If the unit is required to operate at this time push RESET but...

Page 46: ...perature 9 4 Remote control 9 4 1 Remote Controller and Its Functions Note The provided Remote Controller is a wireless type which also can be used as a wire Please see How to Connect The Remote Controller for Wired Operation located in installation instruction in case of wired control is required In wire operation remote controller will return to initial condition PRESET TIMER and CLOCK will retu...

Page 47: ...esired ON timer Press Set the desired OFF timer Press Set the timer Press Set the timer Press Cancel the timer Press Press Set the ON timer Press Press Set the OFF timer Press button during the or mark flashing 1 1 2 3 2 3 3 4 Daily timer allows the user to set both the ON OFF timers and will be activated on a daily basis Setting Daily Timer During the daily timer is activation both arrows are ind...

Page 48: ...mp blink 5 time sec for 5 seconds Do not operate ON timer and OFF timer 2 Press and hold the RESET button on the indoor unit for 3 seconds to cancel the Setting operation 3 beep sound but OPERATION lamp does not blink 11 QUIET OPERATION To operate at super low fan speed for quiet operation except in DRY mode Press Start and stop the operation Note Under certain conditions QUIET operation may not p...

Page 49: ... set B appears in the remote controller display When the remote controller setting is A there is no indication at this position 10 Comfort sleep Indicates when comfort sleep is activaled Push comfort sleep button to select 11 Quiet Indicates when quiet is activated Push quiet button to start and push it again to stop operation 12 One Touch Indicates when one touch comfort is activated Push one tou...

Page 50: ...t Left Bottom right Rear left Bottom left Insulate the refrigerant pipes separately with insulation not together 8 mm thick heat resisting polyethylene foam 8 Flat head wood screw 3 Batteries 2 Wireless remote control 4 Remote control holder 6 Filter 5 Filter 8 Flat head wood screw 9 Flat head wood screw 10 Battery cover A B C D Vinyl tape Apply after carrying out a drainage test Saddle Extension ...

Page 51: ...t with fixing bolts and nuts if the unit is likely to be exposed to a strong wind Use 8 mm or 10 mm anchor bolts and nuts If it is necessary to drain the defrost water attach drain nipple 12 and cap water proof 13 to the bottom plate of the outdoor unit before installing it When using a multi system outdoor unit is used refer to the installation manual provided with the model concerned Drain nippl...

Page 52: ...rol holder x 1 Flter x 1 Part No 4 5 6 Part No Others Name Owner s manual Installation manual Part name Q ty 11 Filter x 1 Battery cover x 1 7 10 Mounting screw 4 x 25 s x 6 Flat head wood screw 3 1 x 16 s x 2 Flat head wood screw 3 1 x 25 s x 1 Screw 4 x 10 s x 2 8 9 12 13 The part marked with asterisk is packaged with the outdoor unit Drain nipple x 1 Cap water proof x 2 51 ...

Page 53: ... Gas leakage detector Applicable to R22 model Changes As pressure is high it is impossible to measure by means of conventional gauge In order to prevent any other refrigerant from being charged each port diameter has been changed In order to increase pressure resisting strength hose materials and port size have been changed to 1 2 UNF 20 threads per inch When purchasing a charge hose be sure to co...

Page 54: ... hole brim ring sold separately Mounting the installation plate Fig 10 3 2 m from the right side edge is e center of pipe hole 35 120 180 240 23 mm 65 mm The center of the pipe hole is above the arrow Pipe hole Fig 10 3 1 Fig 10 3 3 FILE NO SVM 12056 5 4 45 5 7 Top view Reception range Remote control Remote control Side view Indoor unit I ndoor unit R e c e p t i o n r a n g e To unit out line 240...

Page 55: ...p horizontal direction FILE NO SVM 12056 l 10 3 3 Wiring Connection How to connect the connecting cable Wiring the connecting cable can be carried out without removing the front panel 1 Remove the air inlet grille Open the air inlet grille upward and pull it toward you 2 Remove the terminal cover and cord clamp 3 Insert the connecting cable according to the local rule into the pipe hole on the wal...

Page 56: ...may cause of batteries explosion 3 Make hole for insert control wire by use screwdriver break the polyester sheet as shown on figure 7 4 Insert control wire from rear side of remote controller as shown on figure 8 5 Fix control wire which arrange as shown on figure 9 and 10 to terminal by provided screws tighten firmly but not over 0 25 N m 0 03 kgf m 6 Set control wire through gutter way at rear ...

Page 57: ...in hose For leftward connection bottom leftward connection and rear leftward connection s piping it is necessary to change the drain hose and drain cap How to remove the drain cap Clip the drain cap by needle nose pliers and pull out Fig 10 3 13 CAUTI Die cutting front panel slit Changing drain hose Piping preparation Rear right Rear left Bottom left Left Bottom right Right 1 Die cutting front pan...

Page 58: ...d connection with piping Bend the connecting pipe so that it is laid within 43 mm above the wall surface If the connecting pipe is laid exceeding 43 mm above the wall surface the indoor unit may unstably be set on the wall When bending the connecting pipe make sure to use a spring bender so as not to crush the pipe Fig 10 3 18 In case of bottom right or bottom left piping After scribing slits of t...

Page 59: ...oor unit from the installation plate pull the indoor unit toward you while pushing its bottom up at the specified parts Push Push Push unhook 1 Installation plate Hook here 2 Hook 1 Fig 10 3 22 Fig 10 3 21 50 mm or more Do not rise the drain hose Do not form the drain hose into the waved shape Do not put the drain hose end into water Do not put the drain hose end in the drainage ditch 10 3 7 Drain...

Page 60: ...s directly To protect the outdoor unit from snow accumulation install a holding frame and attach a snow protection Do not use a double stacked desing hood and plate Snow protection plate Snow protection hood At least 50 cm Snow accumulation line Holding frame Front Anchor bolts Install at least 50 cm above the snow accumulation line CAUTION 1 Insall the outdoor unit in a location where there are n...

Page 61: ...an perform the air purge together at once AIR PURGE Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump Do not use the refrigerant in the outdoor unit For details see the manual of the vacuum pump Fig 10 4 6 Flare at indoor unit side Flare at outdoor unit side Using a vacuum pump Be sure to use a vacuum pump with counter flow prevention function so that inside oil o...

Page 62: ...kgf m 14 18 N m 1 4 to 1 8 kgf m 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 cap with torque in the following table 10 4 5 Wiring connection 1 Remove the valve cover the electric parts cover and the cord clamp from the oudoor unit 2 Connect the connecting cable to the terminal as identified by the mat...

Page 63: ...two units may receive the remote control signal simultaneously and operate In this case the operation can be preserved by setting either one remote control to B setting Both are set to A setting in factory shipment The remote control signal is not received when the settings of indoor unit and remote control are different There is no relation between A setting B setting and A room B room when conne...

Page 64: ... restart automatically in the same operating mode as before the power failure Information The product was shipped with Auto Restart function in the off position Turn it on as required How to set the auto restart 1 Press and hold the RESET button on the indoor unit 3 seconds to set the operation 3 beep sound and OPERATION lamp blink 5 time sec for 5 seconds 2 Press and hold the RESET button on the ...

Page 65: ...be caused in case of touching parts on the P C board by hand The new inverter 3DV inverter will be incorporated starting with this unit 3DV 3 shunt Discrete Vector control The control circuitry has an uninsulated construction Fig 11 1 IGBT 6 FET 6 MCU Compressor Fan motor Shared potential Driver Driver Amplifier Amplifier No 1 2 3 4 5 6 7 8 9 10 Troubleshooting Procedure First Confirmation Primary...

Page 66: ...mage to the components Do NOT lay the circuit board assembly flat Precautions when inspecting the control section of the outdoor unit NOTE A large capacity electrolytic capacitor is used in the outdoor unit controller inverter Therefore if the power supply is turned off charge charging voltage DC280 to 380V remains and discharging takes a lot of time After turning off the power source if touching ...

Page 67: ...d Increasing of compressor motor speed stops approx 30 seconds after operation started and then compressor motor speed increases again approx 30 seconds after In AUTO mode the operation mode is changed In HEAT mode the compressor motor speed does not increase up to the maxi mum speed or decreases before the temperature arrives at the set temperature Description The OPERATION lamp of the indoor uni...

Page 68: ...eration of the air conditioner 3 When item B and C or item B and apart of item E occur concurrently priority is given to the block of item B OPERATION Green Flashing display 1 Hz OPERATION Green TIMER Yellow FILTER Orange Flashing display 5 Hz OPERATION Green FILTER Orange Flashing display 5 Hz OPERATION Green TIMER Yellow Flashing display 5 Hz OPERATION Green Flashing display 5 Hz Protective circ...

Page 69: ... If there is no fault with a code the indoor unit will beep once Beep and the display of the remote controller will change as follows The TIMER indicator of the indoor unit flashes continuously 5 times per 1 sec Check the unit with all 52 check codes to as shown in Table 11 3 1 Press ON or OFF button to change the check code backward If there is a fault the indoor unit will beep for 10 seconds Bee...

Page 70: ...oom Operation Flashes when 1 Check the sensor TA and connection board temperature sensor is continues error is detected 2 In case of the sensor and its short Circuit or disconnection connection is normal check the P C board TC sensor The heat Operation Flashes when 1 Check the sensor TC and connection exchanger temperature continues error is detected 2 In case of the sensor and its sensor of the i...

Page 71: ...or unit open 4 The outdoor unit abnormal stop at circuit of signal some time Signal circuit of indoor If the other check codes are found P C board or outdoor concurrently check them together P C board is failure Check protector hardware such in some period as Hi Pressure switch Thermal Relay etc Check refrigerant amount or any possibility case which may caused high temperature or high pressure Che...

Page 72: ...en error is detected Flashes when trouble is detected on return serial signal and normal status when signal is reset Displayed when error is detected Displayed when error is detected Displayed when error is detected Judgment and action Even if trying operation again all operations stop immediately Replace P C board 1 Even if connecting lead wire of compressor is removed position detect circuit err...

Page 73: ...CN10 1 3 short circuit Item by symptoms Operation Check Item Considerable principle cause Measures Remote controller is defective Refer to 5 Troubleshooting for remote controller Unit operates normally Replace main P C board Replace fan motor Is fuse F01 of indoor control board blown Microcomputer is defective NO NO NO NO NO YES YES YES YES YES YES Point remote to digital camera Can see infrared r...

Page 74: ...connector CN31 Check this condition within 15 seconds after starting unit Start to operate the indoor unit in except heating operation At this time is it possible to detect DC 1V or more between 5 and 3 of motor connector CN31 Is it possible to detect DC 294 325V between 1 and 3 of motor connector CN31 Motor connection condition Is it possible to detect DC 15V between 4 and 3 of motor connector CN...

Page 75: ...evel to HIGH Is it possible to rotate cross flow fan by hand properly Fan motor operates normally Replace bearing of cross flow fan YES YES YES NO NO NO Does check cross flow fan bearing normal condition Replace indoor fan motor Peplace main P C board Does check display on remote show high Change the new PC board Does fan speed change Replace remote Replace motor NO NO NO YES YES YES A B FILE NO S...

Page 76: ... the P C board is also mounted to inside of the motor If the P C board is soldered imperfectly or the IC is defective the fan motor may automatically rotate by turning on power supply Inspection procedure 3 2 1 Remove the grille 3 2 2 Remove the cover terminal by release one screw 3 2 3 Check DC voltage with CN31 connector while the fan motor is rotating 1 Turn on breaker 2 After Fan motor operate...

Page 77: ...n Is transmission mark indicated Reciver P C board is defective Replace reciver P C board Replace batteries Replace remote controller Normal operation Remote controller is defective NO YES NO YES NO YES NO YES NO YES NO YES NO YES Push the button Does indoor unit beep and operate Reset by take off battery the push button till LCD 5 Troubleshooting for remote controller Primary check Check that A o...

Page 78: ... indoor unit to outdoor unit is correctly performed based upon the follow ing diagram NOTE Measurement should be performed 2 minutes and 30 seconds after starting of the operation Be sure to prepare a diode for judgment Normal time Voltage swings between DC15 and 60V Inverter Assembly check 11 5 1 Abnormal time Voltage does not vary 2 Outdoor unit stops in a little while after operation started Ch...

Page 79: ...ssure from service port and add gas if pressure is low Is connecter of coil connected to inverter Is coil of the pulse motor valve P M V correctly set Existence of condensation at outlet of P M V If there is condensation at outlet 1 4 inch Ø6 35mm valve side the valve is clogged Are temp sensors of indoor outdoor units correctly set to the holder NOTE The temperature sensors which are used to cont...

Page 80: ... failure Remove connector of compressor Replace control board Check terminal Voltage of electrolytic capacitor are in Voltage Rate Turn ON power Supply NO 10 x 1 414 Replace control board NO Cooling 17 C Connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electro lytic capacitor 500µF of C14 with printed CAUTION HIGH VOLTAGE on P C board Discharging positio...

Page 81: ...300 of outdoor fan motor Check winding resistance by ohmmeter are correct Check rotor locking by rotate Turn OFF power supply Replace outdoor fan motor NO Replace compressor Replace control board Replace compressor YES Does compresser operate normally with hand Can it rotate Turn OFF power supply Check compressor winding resistance correct is in rate A NO NO YES NO FILE NO SVM 12056 80 ...

Page 82: ...n removing the front panel or the P C board be sure to shut off the power supply breaker 2 When removing the P C board hold the edge of the P C board and do not apply force to the parts 3 When connecting or disconnecting the connec tors on the P C board hold the whole housing Do not pull at the lead wire 11 8 2 How to shorten time for start the compressor 1 Turn on remote 2 Setting requirment oper...

Page 83: ... 20 30 40 50 Resistance value kΩ Temperature C TD Discharge temp sensor TA Room temp sensor TC Heat exchanger temp sensor TO Outdoor temp sensor TE Outdoor heat exchanger temp sensor TS Suction temp sensor TA TC TO TE TS TD 1 Sensor characteristic table FILE NO SVM 12056 82 ...

Page 84: ...ch winding by using the tester Under 20 C Measure the resistance value of winding by using the tester Under 20 C Measure the resistance value of winding by using the tester Under 20 C Measure the resistance value of winding by using the tester Under 20 C Disconnect the connector and measure resistance value with the tester Normal temperature Temperature Sensor TD kΩ TO TS TE kΩ 10 C 20 C 25 C 30 C...

Page 85: ...al charging characteristics are shown in continuity test by the tester Case that product is good Pointer swings once and returns slowly When performing test once again under another polarity the pointer should return C12 C13 C14 500µF 400V or 760µF 400V 1 Turn OFF the power supply breaker 2 Completely discharge the four electrolytic capacitors 3 Remove the diode block from the P C board which is s...

Page 86: ...e outdoor fan motor 4 Motor drive circuit failure of the outdoor P C board 3 How to simply judge whether outdoor fan motor is good or bad NOTE However GND circuit error inside of the motor may be accepted in some cases when the above check is performed When the fan motor does not become normal even if P C board is replaced replace the outdoor fan motor If the resistance value between 1 Red lead 2 ...

Page 87: ...d they may ignite any oil mixed with the refrigerant gas 2 Do not use welding equipment in an airtight room Carbon monoxide poisoning may result if the room is not properly ventilated 3 Do not bring welding equipment near flammable objects Flames from the equipment may cause the flammable objects to catch fire If keeping the power on is absolutely unavoidable while doing a job such as inspecting t...

Page 88: ... 6 Take off four hooks of panel from rear side How to assemble the front panel 1 Press three center positions and two lower center positions of the air outlet and then hang the hanging hooks 4 pcs at the top side of the front panel to the rear plate 2 Tighten four screws Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound 2 Screws Three hooks 4 Screw ...

Page 89: ...once at the bottom 4 Disengage the display unit by simply pushing at the top of the display unit 5 Remove the fixing screw that secures the conduit mount electric parts box assembly LED assembly and remove the assembly Electric art box cover s screw TC sensor Earth Screw Fan motor connector Louver motor connector Fixing screw LED assembly Fixing screw Loof the qrunding wire p FILE NO SVM 12056 1 R...

Page 90: ...r shafts while sliding the horizontal louver leftward Evaporator Heat exchanger 1 Follow to the procedure in the item 2 Remove the pipe holder from the rear side of the main unit Figure 1 3 Remove two fixing screws at the left side of the end plate of the heat exchanger Remarks Screw Screw FILE NO SVM 12056 Figure 1 Figure 2 Figure 3 Pipe hoolder 89 ...

Page 91: ... is out from the housing push it into the specified position and then incorporate it in the main body Bearing Bearing base Two screws Bearing Bearing base FILE NO SVM 12056 One screw One screw 4 Remove three fixing screw at the right side of the heat exchanger and separate the heat exchanger from the back body Bearing Evaporator Heat exchanger Figure 5 Figure 4 5 Figure 4 n o 90 ...

Page 92: ...f the cross flow fan 3 Remove two fixing screws of the motor cover and them remove the motor cover 4 Remove two more fixing screws of the motor band and remove the motor band Remarks 5 Pull the fan motor outward Set screw Two screws on motor band Two screws on motor cover FILE NO SVM 12056 p 91 ...

Page 93: ...ain unit Holding the set screw install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw q FILE NO SVM 12056 Perform positioning of the fan motor as follows When assembling the fan motor the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front After assembling the two hooking ...

Page 94: ...he indoor unit 2 Attach the upper cabinet ST1TØ4 10L 5 pcs 3 Perform cabling of connecting cable and attach the cord clamp Fix the cord clamp by tightening the screws ST2T 4 x 14L 3 pcs fitting 2 concave parts of the cord clamp to each connecting cables 4 Attach the valve cover ST1T 4 x 10L 2 pcs Insert the upper part into the square hole of the side cabinet set hook claws of the valve cover to sq...

Page 95: ... fitted into the side cabinet left at the front left side so pull up the top of the front cabinet to remove it 2 Attachment 1 Insert the claw on the front left side into the side cabinet left 2 Hook the bottom part of the front right side onto the concave section of the bottom plate Insert the claw of the side cabinet right into the square hole in the front cabinet 3 Return the screws that were re...

Page 96: ...is capacitor is one with mass capacity Therefore it is dangerous that a large spark generates if short circuiting between Requirement As each connector has a lock mecha nism avoid to remove the connector by holding the lead wire but by holding the connector Discharging position Discharging period 10 seconds or more Plug of soldering iron The connector is one with lock so remove it while pushing th...

Page 97: ... be released before they are disconnected 2 Remove the control board assembly from the P C board base Remove the heat sink and control board assembly while keeping them screwed together NOTE Disengage the four claws of the P C board base hold the heat sink and lift to remove it 3 Remove the two fixing screws used to secure the heat sink and control board assembly 4 Mount the new control board asse...

Page 98: ...at exchanger Remarks Detail A Detail B Detail C 1 Perform work of item 1 of and 2 Remove the flange nut fixing the fan motor and the propeller Flange nut is loosened by turning clock wise To tighten the flange nut turn counterclockwise 3 Remove the propeller fan 4 Disconnect the connector for fan motor from the inverter 5 Remove the fixing screws 4 pcs holding by hands so that the fan motor does n...

Page 99: ...from the terminal 6 Remove pipe connected to the compressor with a burner Remarks Reactor 1 Perform work of item 1 of and 2 Remove screws fixing the reactors 7 Remove the fixing screw of the bottom plate and heat exchanger ST1TØ4 10L 1 pc 8 Remove the fixing screw of the bottom plate and valve fixing plate ST1TØ4 10L 1 pc 9 Pull upward the refrigeration cycle 10 Remove NUT 3 pcs fixing the compres...

Page 100: ...achment 1 Perform work of item 1 of 2 Remove the front cabinet and put it down so that fan guard side directs downward Perform work on a corrugated cardboard cloth etc to prevent flaw to the product 3 Remove the hooking claws by pushing minus screwdriver according to the arrow mark in the right figure and remove the fan guard 2 Attachment 1 Insert claws of the fan guard in the holes of the front c...

Page 101: ...the discharge pipe TO sensor Outside air temperature sensor Attachment Insert the outdoor air temperature sensor into the holder and install the holder onto the heat exchanger Procedure Remarks CAUTION During the installation work and on its completion take care not to damage the coverings of the sensor leads on the edges of the metal plates or other parts It is dangerous for these coverings to be...

Page 102: ... Wind the attached color tape round the both terminals of the protective tube when colored protective tube is used 10 Fix the sensor again Remarks 1 2 3 4 5 6 Parts name Sensor Sensor Spring A Sensor Spring B Thermal constringent tube Color tape Terminal Q ty 1 1 1 3 1 3 Cutting here Cutting here Cutting here Soldered part Dryer Winding the color tape 100 200 Connector Thermal sensor part Thermal ...

Page 103: ...207 43T82008 PLATE INSTALLATION 228 43T09471 GRILLE OF AIR INLET ASSY 209 43T19333 HOLDER SENSOR 229 43T80331 FILTER AIR 210 43T49043 HOLDER PIPE 230 43T00586 FRONT PANEL ASSY 212 43T39021 BASE BEARING RAS 18N3KV2 E 218 43T79313 CAP DRAIN 230 43T00594 FRONT PANEL ASSY 222 43T39020 BAND MOTOR LEFT RAS B22N3KV2 E 223 43T39023 BAND MOTOR RIGHT DOWN 232 43T62031 COVER TERMINAL 224 43T39022 BAND MOTOR ...

Page 104: ...07 43T69892 PC BOARD ASSY RAS B22N3KV2 E 402 43T60331 TERMINAL 3P 412 43T21434 STEPPING MOTOR 403 43T69320 TEMPERATURE SENSOR 413 43T60386 MOTOR CORD 404 43T62003 CORD CLAMP 414 43T50320 SENSOR HEAT EXCHANGER 405 43T6V316 PC BOARD ASSY WRS LED RAS B22N3KV2 E 407 43T69721 PC BOARD ASSY RAS 18N3KV2 E Description Description ...

Page 105: ...3T46370 VALVE 4WAY RAS 22N3AV2 E RAS 22N3AV2 E 27 43T63320 4 WAY VALVE COIL ASSEMBLY 9 43T43451 CONDENSER ASSEMBLY RAS 18N3AV2 E RAS 18N3AV2 E 27 43T63334 ASM COIL 4WAY 9 43T43452 CONDENSER ASSEMBLY RAS 22N3AV2 E RAS 22N3AV2 E 28 43T63319 HOLDER SENSOR 10 43T46358 VALVE PACKED 6 35 DIA 29 43T79305 DRAIN NIPPLE 11 43T46355 VALVE PACKED 12 7 DIA H4 30 43T39333 MOTOR BASE 12 43T47331 BONNET 6 35 DIA ...

Page 106: ...S 18N3AV2 E Location Part Location Part No No No No 701 43T62320 HEATSINK 705 43T60377 TEMPERATURE SENSOR 702 43T69943 PC BOARD 706 43T50304 SENSOR HEAT EXCHANGER 703 43T60392 TERMINAL 5P 707 43T62313 BASE PLATE PC 704 43T60326 FUSE Description Description ...

Page 107: ...S 22N3AV2 E Location Part Location Part No No No No 701 43T62331 HEATSINK 705 43T60377 TEMPERATURE SENSOR 702 43T69881 PC BOARD 706 43T50304 SENSOR HEAT EXCHANGER 703 43T60392 TERMINAL 5P 707 43T62313 BASE PLATE PC 704 43T60326 FUSE Description Description ...

Page 108: ...TOSHIBA CARRIER THAILAND CO LTD ...

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Toshiba RAS-18N3AV2-E, Service Manual

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