Toshiba RAS-07EK Service Manual
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Toshiba RAS-07EK Service Manual

Toshiba RAS-07EK Service Manual

Split wall type air-conditioner
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FILE NO. A10-9507
SERVICE MANUAL
AIR-CONDITIONER
SPLIT WALL TYPE
RAS-07EK/RAS-07EA
RAS-09EK/RAS-09EA
PRINTED IN JAPAN, Jan., 1996 S

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Summary of Contents for Toshiba RAS-07EK

  • Page 1 FILE NO. A10-9507 SERVICE MANUAL AIR-CONDITIONER SPLIT WALL TYPE RAS-07EK/RAS-07EA RAS-09EK/RAS-09EA PRINTED IN JAPAN, Jan., 1996 S...

  • Page 2: Table Of Contents

    3-3. Pipe Process Points ......................... 10 4. WIRING DIAGRAM ......................12 5. SPECIFICATIONS OF ELECTRICAL PARTS ..............13 5-1. RAS-07EK/RAS-07EA ........................13 5-2. RAS-09EK/RAS-09EA ........................13 6. REFRIGERANT CYCLE DIAGRAM ................14 7. MICRO-COMPUTER BLOCK DIAGRAM ................. 15 8. OPERATION DESCRIPTIONS................16 ~ 28 8-1.

  • Page 3: Specifications

    1. SPECIFICATIONS Model RAS-07EK/EA RAS-09EK/EA Item Capacity 220V 230V 240V 220V 230V 240V 1.85 1.87 1.90 2.25 2.27 2.30 Btu/h 6310 6380 6480 7680 7750 7850 Phase Single Single Power source 220/230/240 220/230/240 Power consumption 0.51/0.52/0.53 0.71/0.72/0.73 Power factor 95/94/93...
  • Page 4 Note: *1 • Capacity is based on the following temperature conditions. JIS C9612-1994 Cooling (DB) 27°C Indoor unit inlet air temperature (WB) 19°C (DB) 35°C Outdoor unit inlet air temperature (WB) 24°C Note: *2 CHARGELESS • No additional refrigerant required. •...

  • Page 5: Construction Views

    2. CONSTRUCTION VIEWS 2-1. Indoor Unit RAS-07EK RAS-09EK Fig. 2-1 – 5 –...

  • Page 6: Outdoor Unit

    2-2. Outdoor Unit RAS-07EA RAS-09EA Fig. 2-2 – 6 –...

  • Page 7: Caution In Installation

    3. CAUTION IN INSTALLATION 3-1. Installation of Indoor Unit 3-1-1. Removing the Front Panel (1) Open the screw caps and remove the two screws (2) Close the screw caps as behind. securing the front panel. (3) Open the air outlet direction (up-down) louver hori- zontally by hand.
  • Page 8 (2) Insert the connective cable fully into the termi- (5) Fix the wiring cover, rear plate bushing and front nal block and secure it by screw tightly. panel on the indoor unit. (3) Secure the connective cable with the cord clamp. (4) Tightening torque should be 1.2 N.m (12 kgf.cm) Fig.

  • Page 9: Flaring

    3-2. Flaring (2) Left-hand connection with piping When the piping runs to the left, be sure to use a tool 3-2-1. Pipe Cutting such as a pipe bender to bend the pipe. (1) Cut the pipe little by little advancing the blade of Note: pipe cutter slowly.

  • Page 10: Pipe Process Points

    Note: • Fine flaring work shows even brightness on the flared surface and uniform thickness of pipe. • Be sure to remove burrs to avoid unevenness on the flare face which will cause gas leaks. • Unsuccessful flaring work causes gas leaks, therefore rework it.
  • Page 11 (3) The radius of the pipe bend should be 100 mm or Note: more. • Insufficient tightening causes gas leaks. Over tightening results in cracks the flared surface. CAUTION: • Do not use the spanner from the beginning of tightening. Fig.

  • Page 12: Wiring Diagram

    4. WIRING DIAGRAM RAS-07EK/RAS-07EA RAS-09EK/RAS-09EA Fig. 4-1 – 12 –...

  • Page 13: Specifications Of Electrical Parts

    5. SPECIFICATIONS OF ELECTRICAL PARTS 5-1. RAS-07EK/RAS-07EA Parts name Type Specifications Output (Rated) 500W, 2 pole, 1 phase, 220 – 240V, 50 Hz Compressor PH70T White-Black Winding resistance (Ω) Red-Black (at 20°C) 3.44 6.18 Output (Rated) 18W, 2 pole, 1 phase, 200 – 240V, 50 Hz...

  • Page 14: Refrigerant Cycle Diagram

    6. REFRIGERANT CYCLE DIAGRAM RAS-07EK/RAS-07EA RAS-09EK/RAS-09EA Fig. 6-1 Table 6-1 Surface temp. of heat Ambient temp. Standard pressure exchanger interchang- conditions DB/WB ing pipe (°C) (°C) 50Hz (kg/cm Outdoor Indoor Standard 49.0 27/19 35/24 Cooling High temperature 15.0 60.0 32/23...

  • Page 15: Micro-Computer Block Diagram

    7. MICRO-COMPUTER BLOCK DIAGRAM Fig. 7-1 – 15 –...

  • Page 16: Operation Descriptions

    8. OPERATION DESCRIPTIONS 8-1. Names and Functions of Indicators and Controls on Indoor Unit 8-1-1. Display Panel The operating conditions are indicated below. Fig. 8-1 8-1-2. Control Panel Lift the front panel to perform control panel setting. (1) Opening the front panel 1) Push the PUSH on both lower corners of the front panel.
  • Page 17 (e) Fan speed button (FAN) • Push this button to select fan speed. • When you select AUTO, the fan speed is au- tomatically adjusted according to the room temperature. You can also manually select the desired fan speed from three settings. (A receiving beep is heard.) (f) Auto louver button (AUTO) •...

  • Page 18: Names And Functions Of Indicators On Remote Controller

    8-4. Handling the Remote Controller 8-3. Names and Functions of Indicators on Remote Controller 8-4-1. Location of the Remote Controller (a) Transmission indicator Keep the remote controller where its signals can reach the receiver of the air conditioner (a distance of 7m is •...
  • Page 19 8-4-3. Replacing Batteries CAUTIONS: The remote controller uses two alkaline dry batteries (LR03). • The air conditioner will not operate if curtains (1) Remove the cover of the battery compartment at doors or other materials block the signal from the back of the remote controller by sliding it out the remote controller to the indoor unit.

  • Page 20: Automatic Operation

    OPERATING MODE: Once you select the operating mode, the operating conditions are saved in the unit’s microcomputer memory. Thereafter, the air conditioner will start operating under the same conditions when you simply push the START/STOP button of the remote controller. 8-5.

  • Page 21: Cooling/Fan Only Operation

    8-6. Cooling/Fan Only Operation 8-6-1. Operation Steps Start • The OPERATION lamp (green) on the display panel of the indoor unit starts flashing. (1) Mode button • Select COOL, or FAN ONLY. (2) TEMP. button • Push the TEMP. button. •...

  • Page 22: Dry Operation

    8-7. Dry Operation 8-8. Timer Operation 8-7-1. Operation Steps 8-8-1. Operation Steps Start The timer-reserved time indicates the time remaining available. The time indicated on the remote controller • The OPERATION lamp (green) on the display changes accordingly. panel of the indoor unit starts flashing. (1) ON or OFF TIMER button (1) Mode button •...
  • Page 23 (2) ON TIMER (Stop ∅ ∅ ∅ ∅ ∅ Operation) CAUTION: The ON TIMER feature is useful when you wake up in the morning or when you return home. The When you select the timer operation, the remote air conditioner will automatically start operating controller automatically transmits the timer signal at the time set.

  • Page 24: Adjusting Air Flow Direction

    8-9. ADJUSTING AIR FLOW DIRECTION (4) During cool and dry operation, change the air flow direction within the range indicated. 8-9-1. Adjustment of Vertical Air Flow Direction (1) When using the wireless auto louver, the air flow direction is automatically set to the desired posi- tion of the last time adjusted during operation.
  • Page 25 8-9-2. Adjusting the Horizontal Air Flow Direction Preparation: For the cooling or dry operation, move the vertical air flow louver downward using the SET button on the remote controller. (1) Take hold of the lever on the horizontal air flow grilles and move them to adjust the air flow direc- tion as required.

  • Page 26: Fan Only Operation

    Table 8-2 Manual setting of FAN SPEED PREPARATION: Indication of FAN SPEED Air volume • When the power plug (or cord) is connected to EK: AC 220/230/240V (50 Hz) outlet, the OP- ERATION (ON) lamp starts flashing, indicat- HIGH HIGH ing that power has been turned on (or that power failure occurred).

  • Page 27: Econo. Mode

    8-12.ECONO. Mode 8-13.DRY Operation (The remote controller’s ECONO. button is pushed (The remote controller’s MODE button is set to the and ECONO. display is lit.) DRY position.) (1) When the ECONO. button is pushed, the indoor (1) In this mode, a microprocessor control lowers hu- unit operates quietly and mildly with controlling midity while maintaining a constant temperature.

  • Page 28: Auto Operation

    8-14.AUTO Operation (The remote controller’s MODE button is set to the AUTO position and AUTO display is lit.) (1) Either the cooling mode or dry mode is selected according to room temperature at which opera- tion is to start, as shown in Fig. 8-25. The Fan mode will continue until room temperature reaches a level at which another mode is selected.

  • Page 29: Troubleshooting Chart

    9. TROUBLESHOOTING CHART Troubleshooting Procedures: • Following details of “What to be prechecked first”, make sure of the basic items. • When there is no trouble corresponding to above, check in detail the faulty parts following “How to judge faulty parts by symptoms” later. 9-1.

  • Page 30: Primary Judgement Of Trouble Sources

    9-2. Primary Judgement of Trouble Sources 9-2-1. Role of Indoor Unit Controller 9-2-2. Display of Abnormalities and Judgement The indoor unit controller receives the operation com- of the Abnormal Spots mands from the remote control and assumes the fol- The indoor unit of this machine observes the opera- lowing functions.
  • Page 31 (2) Self-diagnosis with remote controller 2) Selecting ordinary mode With the indoor unit controller, self-diagnosis of Push the all clear button (ACL) on the rear protective circuit action can be done by turning bottom of the wireless remote control with a the remote controller operation into service mode, tip of pencil for more than 3 seconds.
  • Page 32 <Self-diagnosis by check codes> 2) Remote control key operation under the ser- vice mode is conducted by ON/OFF or TEMP. 1) The self-diagnosis by the check codes is con- ducted under the block displays of item B-E. The remote control display by each key op- eration is varied as shown below.
  • Page 33 Table 9-5 Block level Diagnosis function Judgement and action Check Check Air conditioner Block Symptom Condition code code status Indoor PC Thermo sensor Continued Indicated when • Check thermo sensor. board short/break. operation detected abnor- • If it is OK, check PC mal.

  • Page 34: Troubleshooting Flowcharts

    9-3. Troubleshooting Flowcharts 9-3-1. Power cannot be Turned on (No Operation At All) <Preliminary checks> (1) Is the supply voltage normal? (2) Is the connection to the AC output O.K.? (3) Are the connection of the primary side and the secondary side of the power transformer inserted into the PC board? Color identification WHI : WHITE...
  • Page 35 9-3-2. Relay RY07, RY08 do not Operate. Louver is not controlled automatically. Note: • When wiring to the thermal fuse has been broken, the timer lamp and operation lamp will flash with 5 Hz. 9-3-3. Only the Indoor Fan does not Operate. <Preliminary checks>...

  • Page 36: Test Points On The Pc Board And List Of Voltage Values

    12 ± 2V Is the voltage of the primary side of the – 220/230/240V AC transformer O.K.? (RAS-07EK, 09EK) – 5V AC or less: normal Are both PTH terminals 5V AC or less? 5V AC or more: abnor- Either end of PTH...

  • Page 37: How To Check The Remote Control (Including The Indoor Pc Board)

    9-5. How to Check the Remote Control (Including the Indoor PC Board) – 37 –...
  • Page 38 9-5-1. How to check the PC board 2) The PC board consists of the following 4 parts: (1) Operating precautions a. Main PC board part: 1) When removing the front panel or the PC Power relay, indoor fan motor drive circuit and board, be sure to disconnect the power plug control circuit, C.P .U.
  • Page 39 Procedure Check point (Symptom) Trouble cause Push the START/STOP button once to 1.The compressor does not operate. • The temperature of the Indoor set in operation mode. heat exchange unit is extremely low. 1.Setting the anti-resistor timer 2.The operation lamp flashes. •...

  • Page 40: Pc Board Layout

    9-6. PC Board Layout Top view – 40 –...
  • Page 41 Bottom view – 41 –...

  • Page 42: Exploded Views And Parts List

    10. EXPLODED VIEWS AND PARTS LIST 10-1. Indoor Unit Location Part Location Part Description Description 43005209 Front Panel 43047332 Pipe, Suction 43003218 Rear Plate 43068357 Remote Controller 43007963 Bush, Rear Plate, Right 43021794 Motor, Louver 43007967 Lid, Rear Plate 43070090 Hose, 3M, Drain 43011503 Pipe Sealed 43070140 Hose, Drain...
  • Page 43 43033211 Capacitor, Film 43069627 SS-Sensor, Thermostat 43033213 Capacitor, ECQ-UV, 43060023 Cord, Power 0.1MFD, 250V 43082263 Screw-Driver 43055284 Toshiba Non Linear Resistor 43060007 Thermal Fuse Set 43032488 Posistor, 820HM 43068355 P.C. Board Assembly, Trans 43060013 Fuse, Time Delay – 43 –...

  • Page 44: Outdoor Unit

    10-2. Outdoor unit Location Part Location Part Description Description 43005038 Back Cabinet 43021928 Fan-Motor, UE6-21A5P 43005037 Front Cabinet 43020227 Condenser 43019769 Guard, Fan 43020228 Condenser 43019653 Handle 43046228 Packed valve, 6.35 43062193 Cover, E-Parts 43046229 Packed valve, 3/8 43047549 Flange, Nut 43147196 Bonnet, 6.35 DIA 43020223 Fan, Propeller...
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  • Page 49 1–1, SHIBAURA 1– CHOME, MINATO – KU, TOKYO 105 – 01, JAPAN...

This manual is also suitable for:

Ras-07eaRas-09ekRas-09ea

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