Toyotomi TAN-A20EW Service Manual

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SERVICE MANUAL

ROOM AIR CONDITIONER

SPECIFICATION .................................................................... 1

FUNCTIONS .......................................................................... 7

SERVICE FUNCTION EXPLANATION .................................. 9

OPERATION DETAILS ......................................................... 10

TROUBLESHOOTING GUIDE ............................................. 19

PERFORMANCE CURVE DIAGRAM .................................. 27

SCHEMATIC DIAGRAM AND

THERMISTOR RESISTANCE CHART .................................

ELECTRIC CIRCUIT DIAGRAM ..........................................

EXPLODED VIEW (INDOOR UNIT) ....................................

EXPLODED VIEW (OUTDOOR UNIT) ................................

PARTS LIST (INDOOR UNIT) ..............................................

PARTS LIST (OUTDOOR UNIT) ..........................................

TAN/TAG-A20EW

TAN/TAG-A28EW

TAN/TAG-A32EW

CONTENTS

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Page 1: Table Of Contents
SERVICE MANUAL ROOM AIR CONDITIONER TAN/TAG-A20EW TAN/TAG-A28EW TAN/TAG-A32EW CONTENTS SPECIFICATION ..............1 FUNCTIONS ................7 SERVICE FUNCTION EXPLANATION ........9 OPERATION DETAILS ............10 TROUBLESHOOTING GUIDE ..........19 PERFORMANCE CURVE DIAGRAM ........27 SCHEMATIC DIAGRAM AND THERMISTOR RESISTANCE CHART ......... ELECTRIC CIRCUIT DIAGRAM ..........
Page 2: Specification
SPECIFICATION TAN/TAG-A20EW INDOOR OUTDOOR Unit TAN-A20EW TAG-A20EW Cooling Capacity BTU/h 7,700 – Heating Capacity BTU/h 8,800 – Moisture Removal – phase Single Power source SIDE VIEW TOP VIEW OUTLET Airflow Method INTAKE Cooling ; Air circulation (at High) – m/min Heating ;...
Page 3 SPECIFICATION INDOOR OUTDOOR Unit TAN-A20EW TAG-A20EW Type Cross-flow Fan Propeller Fan Air Circulation Motor Type Induction (4-pole) Induction (6-pole) Rated Output Plate fin configuration,forced draft Heat Exchanger 18.1FPI 19.5 FPI Capillary Tube Refrigerant Control Device – 700(24.7) – Refrigerant (R410A)
Page 4 SPECIFICATION TAN/TAG-A28EW INDOOR OUTDOOR Unit TAN-A28EW TAG-A28EW Cooling Capacity BTU/h 9,000 – Heating Capacity BTU/h 10,500 – Moisture Removal – phase Single Power source SIDE VIEW TOP VIEW OUTLET Airflow Method INTAKE Cooling ; Air circulation (at High) – m/min Heating ;...
Page 5 SPECIFICATION INDOOR OUTDOOR Unit TAN-A28EW TAG-A28EW Type Cross-flow Fan Propeller Fan Air Circulation Motor Type Induction (4-pole) Induction (6-pole) Rated Output Plate fin configuration,forced draft Heat Exchanger 18.1FPI 19.5FPI Capillary Tube Refrigerant Control Device – 830(29.3) – Refrigerant (R410A) g (oz) Thermostat Electronic Control –...
Page 6 SPECIFICATION TAN/TAG-A32EW INDOOR OUTDOOR Unit TAN-A32EW TAG-A32EW Cooling Capacity BTU/h 11,500 – Heating Capacity BTU/h 13,500 – Moisture Removal – phase Single Power source SIDE VIEW TOP VIEW OUTLET Airflow Method INTAKE Cooling ; Air circulation (at High) – m/min Heating ;...
Page 7 SPECIFICATION INDOOR OUTDOOR Unit TAN-A32EW TAG-A32EW Type Cross-flow Fan Propeller Fan Air Circulation Motor Type Induction (4-pole) Induction (6-pole) Rated Output Plate fin configuration,forced draft Heat Exchanger 19.5FPI 19.5 FPI Capillary Tube Refrigerant Control Device – 1,100(38.8) – Refrigerant (R410A) g (oz) Thermostat Electronic Control...
Page 8: Functions
FUNCTIONS REMOTE-CONTROL TRANSMITTER INDOOR UNIT Sensing the room temperature Room temperature sensor (thermistor) ON/OFF Time delay safety control Restarting is inhibited for approximately Operation mode selection 3 minutes. AUTOMATIC COOL Indoor fan speed control HEAT High, Med, Low CIRCULATER Operation indication lamps (LED) Air flow selection (GREEN) ..
Page 9: Outdoor Unit
FUNCTIONS OUTDOOR UNIT Hot-start control (heating) The indoor fan stops until the evaporator piping temperature will be reached. Overload protection Anti-freezing control for the evaporator Compressor will be stopped when the evapolator’s piping temperature is below 2°C for one minute. Compressor will be restarted when the evaporator’s piping temperature is above Compressor overload protector...
Page 10: Service Function Explanation
SERVICE FUNCTION EXPLANATION EMERGENCY AND TEST OPERATION Emergency Operation • Use this operation only when the remote controller is out of order or lost. • When the emergency operation switch is pressed, beep starts once, which Beep means the start of this operation. •...
Page 11: Operation Details
OPERATION DETAILS TIMER OPERATION ON Timer operation • Press the ON/OFF switch. • Set the “ON Time” : Press the “TIME ADJ” button twice. Adjust the time with the “ ” button. Press the “TIME ADJ” button twice.The setting of “ON Time” is completed and the present time appears on the LCD. •...
Page 12: Cooling Mode Operation
OPERATION DETAILS TIME DELAY SAFETY CONTROL FUNCTION - FOR PROTECTION OF COMPRESSOR • Compressor will not restart, in any operation modes, for 3 minutes after its stop. • Compressor does not stop during the first 3 minutes of its operation even if the room temperature reaches to the designated temperature, except changing setting temperature.
Page 13 OPERATION DETAILS • Fan speed control when “Auto” is selected in fan mode When “Auto” is selected,the fan speed is automatically controlled according to the difference between the room and designated temperatures. ROOM TEMP. DESIGNATED TEMP. INDOOR FAN • Method of anti-freezing control of heat-exchanger(indoor) When the sensor(heat-exchanger) detects the temperature below 2°C for the duration of one minute,the compressor stops the operation.
Page 14: Dry Mode Operation
OPERATION DETAILS DRY MODE OPERATION 1. When the room temperature is +2°C (or more) higher than designated temperature, compressor and indoor fan operate. 2. When the room temperature has been cooled to the temperature +2°C higher than the designated, the compressor and indoor fan start intermittent operation, ON (for 10 min.) and OFF (for 6 min.) by turns.
Page 15: Heating Mode Operation
OPERATION DETAILS HEATING MODE OPERATION • When room temperature is raised to +6 ° C higher than the designated temperature, compressor stops. • When room temperature gets less than +5.3 ° C higher than the designated temperature, compressor turns on. •...
Page 16 OPERATION DETAILS • Fan speed control when “Auto” is selected in fan mode When “Auto” is selected,the fan speed is automatically controlled according to the difference between the room and designated temp.+4°C. ROOM TEMP. DESIGNATED TEMP.+6 INDOOR FAN Super low •...
Page 17 OPERATION DETAILS • Method of overload control by checking the operating current CURRENT OUTDOOR FAN TAN/TAG-A20EW 3.6A 3.2A TAN/TAG-A28EW 3.7A 3.3A TAN/TAG-A32EW 4.9A 4.5A – 16 –...
Page 18: Defrosting Operation
OPERATION DETAILS DEFROSTING OPERATION • Defrosting operation is controlled by room temperature, temperature of indoor heat exchanger and timer switch. • Defrosting operation starts when (a) 50 minutes pass after the start of heating operation or after the completion of previous defrosting operation, and while compressor is running, the temperature of indoor heat exchanger falls below “room temperature +14°C”.
Page 19: Refrigeration Cycle Diagram
OPERATION DETAILS REFRIGERATION CYCLE DIAGRAM INDOOR UNIT OUTDOOR UNIT REFRIGERANT PIPING CAPILLARY TUBE STRAINER CAPILLARY TUBE 2-WAY VALVE CHECK VALVE HEAT EXCHANGER HEAT EXCHANGER REFRIGERANT PIPING 4-WAY VALVE 3-WAY VALVE REFRIGERANT FLOW COMPRESSOR COOLING MODE HEATING MODE ACCUMULATOR – 18 –...
Page 20: Troubleshooting Guide
TROUBLESHOOTING GUIDE FOR YOUR SAFETY USE TAN : indoor unit TAG : outdoor unit For the safety and proper use and handling of the product, please read and follow the instructions carefully. The meaning of the marks below are as follows. Danger Improper use will cause the significant risk of death or serious injury of the user.
Page 21 TROUBLESHOOTING GUIDE DRY & COOLING OPERATION [NOTE.1] POWER SUPPLY check the plug inserted into the outlet and the power supply REMOTE CONTROLLER if the battery is dead or failure in remote controller POWER TIMER OPERATION REMOTE CONTROL change to new one (green) (yellow) (green) check the fuse by eyes or cheak the electric continuity by tester...
Page 22: Heating Operation
TROUBLESHOOTING GUIDE HEATING OPERATION [NOTE.1] POWER SUPPLY check the plug inserted into the outlet and the power supply REMOTE CONTROLLER POWER TIMER OPERATION if the battery is dead or failure in remote controller REMOTE CONTROLLER (green) (yellow) (green) change to new one check the fuse by eyes or cheak the electric continuity by tester FUSE (2.0A) TRANSFORMER...
Page 23 TROUBLESHOOTING GUIDE CHECK A FOLLOWING STEPS fig. 1 Resistance of transformer fig. 2 Resistance of louver motor Transformer resistance primary red-red about 800 tester secondary blue-blue about 3 resistance secondary tester Check the power source blue common terminal resistance The transformer is located in primary terminal block inner part in the control box/...
Page 24 TROUBLESHOOTING GUIDE HOW TO DETACH CONTROL BOX AND MAIN CONTROLLER (6) above fixed hock (13) (14) (10) (12) (14) (11) (1) wiring cover How to detach control box assembly (1) Detach wiring cover and connecting cables. (2) Pull out connectors of TAN fan motor. (2 places) (3) Pull out connector of louver motor.
Page 25 TROUBLESHOOTING GUIDE BLOCK DIAGRAM – 24 –...
Page 26: Wiring Diagram
TROUBLESHOOTING GUIDE WIRING DIAGRAM TAN-A20EW, TAN-A28EW, TAN-A32EW TAG-A20EW TAG-A28EW TAG-A32EW TAN : INDOOR UNIT :BLACK :RED TAG : OUTDOOR UNIT :BLUE :WHITE :BROWN :YELLOW :GREEN – 25 –...
Page 27 TROUBLESHOOTING GUIDE TAN/TAG-A20EW OVERHEAT PREVENTIVE RELAY(OHR) Any gas leakage? After repair, fill up prescribed gas. Firstly cut down power source. when the temp. of above part of the compressor is below 50°C, does the OHR have electric continuity? (see left fig) attention high temp.
Page 28: Performance Curve Diagram
PERFORMANCE CURVE DIAGRAM REMARKS FOR GAS PRESSURE CHECK AND CHARGING If you find substantial diffrence in performance compared with PERFORMANCE CURVE as shown in the following pages, recharge the refrigerant. (In order to avoid excessive charging, purge all the remaining refrigerant first and then evacuate the unit completely with vacuum pump and finally apply rated volume charging of refrigerant.) Charging of refrigerant should be done by cooling operation, because the pressure at service valve will be too high at heating cycle, then the heating performance characteristics must be checked by restarting of...
Page 29 PERFORMANCE CURVE DIAGRAM TAN/TAG-A20EW COOLING CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY60% AIR TEMPERATURE INDOOR-OUTDOOR HEATING AIR-TEMPERATURE INDOOR 20 CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY50% AIR TEMPERATURE-OUTDOOR – 28 –...
Page 30 PERFORMANCE CURVE DIAGRAM TAN/TAG-A28EW COOLING CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY60% AIR TEMPERATURE INDOOR-OUTDOOR HEATING AIR-TEMPERATURE INDOOR 20 CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY50% AIR TEMPERATURE-OUTDOOR – 29 –...
Page 31 PERFORMANCE CURVE DIAGRAM TAN/TAG-A32EW COOLING CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY60% AIR TEMPERATURE INDOOR-OUTDOOR HEATING AIR-TEMPERATURE INDOOR 20 CURRENT TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE HUMIDITY50% AIR TEMPERATURE-OUTDOOR – 30 –...
Page 32: Thermistor Resistance Chart
THERMISTOR RESISTANCE CHART SENSOR, ROOM TEMPERATURE – 39 –...
Page 33 THERMISTOR RESISTANCE CHART – 40 –...
Page 34 THERMISTOR RESISTANCE CHART SENSOR, DEFROST TEMPERATURE – 41 –...
Page 35 THERMISTOR RESISTANCE CHART – 42 –...
Page 36: Electric Circuit Diagram
ELECTRIC CIRCUIT DIAGRAM TAN/TAG-A20EW – 47 –...
Page 37 ELECTRIC CIRCUIT DIAGRAM TAN/TAG-A28EW, TAN/TAG-A32EW – 48 –...
Page 38: Exploded View (Indoor Unit)
EXPLODED VIEW ( INDOOR UNIT ) TAN-A20EW TAN-A28EW accessories – 49 –...
Page 39 EXPLODED VIEW ( INDOOR UNIT ) TAN-A32EW accessories – 50 –...
Page 40: Exploded View (Outdoor Unit)
EXPLODED VIEW ( OUTDOOR UNIT ) TAG-A20EW – 51 –...
Page 41 EXPLODED VIEW ( OUTDOOR UNIT ) TAG-A28EW – 52 –...
Page 42 TAG-A32EW – 53 –...
Page 43 PARTS LIST ( INDOOR UNIT ) & & – 54 –...
Page 44 PARTS LIST ( OUTDOOR UNIT ) – 55 –...
Page 45 PARTS LIST ( OUTDOOR UNIT ) – 56 –...
Page 46 PARTS LIST ( OUTDOOR UNIT ) – 57 –...
Page 47 RA-20-[1] ISSUED JUL.2004 Printed in Japan...

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Toyotomi TAN-A20EW Service Manual

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SERVICE MANUAL

ROOM AIR CONDITIONER

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