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Toshiba RAC-08EW-E Service Manual
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Toshiba RAC-08EW-E Service Manual

Toshiba RAC-08EW-E Service Manual

Room air-conditioner portable type
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FILE NO. A00-9607
SERVICE MANUAL
ROOM AIR-CONDITIONER
PORTABLE TYPE
RAC-08EW-E
PRINTED IN JAPAN Mar., 1996 S

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Summary of Contents for Toshiba RAC-08EW-E

  • Page 1 FILE NO. A00-9607 SERVICE MANUAL ROOM AIR-CONDITIONER PORTABLE TYPE RAC-08EW-E PRINTED IN JAPAN Mar., 1996 S...

  • Page 2: Table Of Contents

    2. SPECIFICATIONS OF ACCESSORIES ................3 3. APPEARANCE ........................4 4. SPECIFICATIONS OF ELECTRICAL PARTS ..............4 5. WIRING DIAGRAM (RAC-08EW-E) .................. 5 6. COOLING CHARACTER CHART ..................6 7. REFRIGERATING CYCLE DIAGRAM................7 8. MICROCOMPUTER BLOCK DIAGRAM ................8 9.

  • Page 3: Specifications

    1. SPECIFICATIONS Model RAC-08EW-E Item Height Dimensions Width Depth Net weight Frequency Power source Rated voltage 1 phase, 220/230/240 Cooling capacity 2.10/2.18/2.18 Standard Airflow, high 390/400/410 performance Moisture removal lit/h Running current 3.82/3.80/3.85 Electrical Power consumption 780/800/840 characteristics Power factor...

  • Page 4: Appearance

    3. APPEARANCE Fig. 3-1 4. SPECIFICATIONS OF ELECTRICAL PARTS Parts name Type Specifications Single phase, 50 Hz, 220/230/240V ~, AC. 750W output Compressor PH94X1-4G1 Winding resistance Red-Black White-Black Red-White (Ω) (at 20°C) 4.55 8.55 13.1 Single phase, 50 Hz, 230V, AC. 20W output Fan motor STF-230-20-4C Winding resistance...

  • Page 5: Wiring Diagram (Rac-08Ew-E)

    5. WIRING DIAGRAM (RAC-08EW-E) Fig. 5-1 – 5 –...

  • Page 6: Cooling Character Chart

    6. COOLING CHARACTER CHART Fig. 6-1 – 6 –...

  • Page 7: Refrigerating Cycle Diagram

    7. REFRIGERATING CYCLE DIAGRAM RAC-08EW-E Fig. 7-1 RAC-08EW-E Table 7-1 Surface temp. of heat exchanger Ambient temp. interchanging pipe (°C) conditions DB/WB (°C) Conditions Indoor Outdoor 27/19 35/24 Standard Cooling High temperature 32/23 43/26 Low temperature 21/15 21/15 Note: Measure the heat exchanger temperature at the center of U-bend. (By means of thermistor thermometer.)

  • Page 8: Microcomputer Block Diagram

    8. MICROCOMPUTER BLOCK DIAGRAM Mode selector Functions (Cool/Dry/Fan only) 3-minute delay at Restart for Operation indicator compressor Start-up Compensation for fan Economy indicator motor Timer Economy indicator Processing Warning indicator (Temperature processing) Timer selector (ON, CONTINUE, OFF) Timer setting Air flow selection (Fan selector High, C.P.U.

  • Page 9: Operation Descriptions

    9. OPERATION DESCRIPTIONS 9-1. Operation Control Knobs on Control Panel Fig. 9-1 – 9 –...

  • Page 10: Outline Of Operations

    10. OUTLINE OF OPERATIONS 10-1.Basic Operation 10-2.Economy Mode (1) When I/O button is pushed, the relays RY01, This control mode establishes some zones corre- RY02 or RY03 and power relay RY07 start ac- sponding to different combinations of on and off in- cording to the conditions set by FAN SPEED knob tervals of the compressor and selects a suitable zone selector switch.

  • Page 11: Dry Mode

    10-3.Dry Mode The compressor and airflow fan will operate indepen- In this mode, a microcomputer control lowers humid- dent of the temperature control, though the pattern ity while maintaining a constant temperature. The of operation depends on the relation between room microcomputer turns the compressor on and off at temperature (T ) and set temperature (Ts), as shown...

  • Page 12: Troubleshooting Chart

    11. TROUBLESHOOTING CHART Troubleshooting procedures: • Following the 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”...

  • Page 13: How To Judge Faulty Parts By Symptoms

    11-2. How to Judge Faulty Parts by Symptoms One of the most important matters for the repair of air conditioners is accurate trouble analysis. For this purpose, it is required to make a correct judgement about the problem by asking the user. 11-2-1.
  • Page 14 11-2-2. No Power Turns On (Air Conditioner Does Not Operate) <Precheck> (1) Is voltage to wall socket normal? (3) Is water filled in the tank? (2) Has cord plug fully sealed in the socket? (4) Is timer set in timer mode? (Is timer select switch set to ON?) <Checking Procedures>...
  • Page 15 11-2-4. Only Fan Does Not Work <Precheck> (1) Does fan rotate even in the cool mode and the fan only mode? <Checking Procedures> – 15 –...
  • Page 16 11-2-5. Compressor Does Not Operate <Precheck> (1) Is room temperature control on the control panel higher than room temperature in the cool mode? (2) Is the MODE selector knob on the control panel left set to “FAN ONLY”? <Checking Procedures> –...
  • Page 17 11-2-6. Compressor Does Not Operate <Precheck> (1) Is the target room temperature specified by the remote controller assembly higher than current room tem- perature, in the cool mode? (2) Are the wiring and contacts of connecting cables in a satisfactory condition? <Checking Procedure>...
  • Page 18 11-2-7. The Unit Repeats ON/OFF Operation Frequently – 18 –...
  • Page 19 11-2-8. Operable But Abnormal (A) No or insufficient cooling/drying – 19 –...
  • Page 20 (B) Water Leaks Installation condition of the air conditioner is defective. Normal Dew condensation on the external body. Water stays here. Causes: (1) There is a moisture generating source in the room. (3) Window has been kept open while raining, and after that, cooling operation is started.
  • Page 21 (C) Abnormal Noise – 21 –...

  • Page 22: Pc Board Layout

    11-3. PC Board Layout Top view – 22 –...
  • Page 23 Bottom view – 23 –...

  • Page 24: Installation Instruction

    Exhaust hose source rating rating Caster seat 1φ 50 Hz, RAC-08EW-E Cap (for exhaust hole) 220/230/240V 12-1.Installation Method 12-2.Routine Maintenance (1) Insert the connection port (round) into the air con- (1) Be sure to observe the following for a longer ser- ditioner surely to its root.

  • Page 25: Changing Of Water

    12-4.Changing of Water 12-5.Relocation of Air Conditioner (1) As the water in tank becomes dirty gradually in (1) When you move the air conditioner, be sure to cooling water, change the water once every week. drain out the water in tank first, and do not lay down the air conditioner.

  • Page 26: Cleaning Method Of Condenser

    13. CLEANING METHOD OF CONDENSER 13-1.Condenser Servicing Procedures (5) Remove two screws fastening the condenser (1) Pull out the air filter. cover (one in the front part and another in the (2) Remove six screws at the back and take off the rear).

  • Page 27: Exploded Views And Parts List

    14. EXPLODED VIEWS AND PARTS LIST Location Part Location Part Description Description 43000679 Front Panel 43079081 Cap, Water-Tank 43008399 Door, Control-Panel 43089126 Exhaust-Hose 43003190 Cabinet, Back 43089127 Cap, Exhaust Hole 43000680 Cabinet 43089128 Exhaust Hole 43080332 Air-Filter 43088645 Owner’s Manual 43019800 Handle 43069760 Cord Band 43000678 Door, Front...
  • Page 28 Location Part Location Part Description Description 43058255 Transformer, FT67-2 43055359 Toshiba Nonlinear Resistor 43055420 Capacitor, Electrolytic 43035573 Surge Absorber 43060064 Cord, Power 43031043 TR, 2SD880Y 43050341 Thermo-Sensor 43034036 Relay, Power 43050340 Sensor, Heat Exchanger 43060899 Fuse 43068439 PC Board Assembly...
  • Page 29 Part Location Part Description Description 43058255 Transformer, FT67-2 43033197 Capacitor, Electrolytic 43055420 Capacitor, Electrolytic 43055359 Toshiba Nonlinear Resistor 43060064 Cord, Power 43035573 Surge Absorber 43050341 Thermo-Sensor 43031043 TR, 2SD880Y 43050340 Sensor, Heat Exchanger 43034036 Relay, Power 43068439 PC Board Assembly...
  • Page 30 Location Part Location Part Description Description 43022394 Casing, Up 43051323 Switch, Float 43022395 Casing, Low 43070139 Hose, Water 43022396 Case, Fan, Up 43019829 Caster 43022397 Case, Fan, Low 43079087 Cap 43020249 Fan, Multi-Blade 43063164 Cover, Switch 43072327 Drain-Pan 43089106 Seat-Caster 43022392 Case, Fan, Exhaust 43011508 Cushion, Sub...
  • Page 31 Location Part Location Part Description Description 43041589 Compressor, PH94X1-4G1 43095302 Cushion, Rubber 43044543 Evaporator 43007890 Holder, Sensor, TA 43043523 Condenser 43063188 Holder-Sensor-TC 43043524 Condenser, Air – 31 –...
  • Page 32 – 32 –...
  • Page 33 1–1, SHIBAURA 1– CHOME, MINATO – KU, TOKYO 105 – 01, JAPAN...

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