Table of Contents
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SERVICE MANUAL
ROOM AIR CONDITIONER
TAN3/TAG3-A70EW
CONTENTS
SPECIFICATION .................................................................... 1
FUNCTIONS .......................................................................... 4
SERVICE FUNCTION EXPLANATION .................................. 6
OPERATION DETAILS ........................................................... 7
TROUBLESHOOTING GUIDE ............................................. 16
PERFORMANCE CURVE DIAGRAM .................................. 24
SEMICONDUCTOR LEAD IDENTIFICATION...................... 26
SCHEMATIC DIAGRAM AND
THERMISTOR RESISTANCE CHART .................................
EXPLODED VIEW (INDOOR UNIT) ....................................
EXPLODED VIEW (OUTDOOR UNIT) ................................
PARTS LIST (INDOOR UNIT) ..............................................
PARTS LIST (OUTDOOR UNIT) ..........................................
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Summary of Contents for Toyotomi TAN3-A70EW
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Page 1: Table Of Contents
SERVICE MANUAL ROOM AIR CONDITIONER TAN3/TAG3-A70EW CONTENTS SPECIFICATION ..............1 FUNCTIONS ................4 SERVICE FUNCTION EXPLANATION ........6 OPERATION DETAILS ............7 TROUBLESHOOTING GUIDE ..........16 PERFORMANCE CURVE DIAGRAM ........24 SEMICONDUCTOR LEAD IDENTIFICATION...... 26 SCHEMATIC DIAGRAM AND THERMISTOR RESISTANCE CHART ......... EXPLODED VIEW (INDOOR UNIT) ........ -
Page 2: Specification
SPECIFICATION ROOM A1 ROOM B ROOM A2 COMPRESSOR A COMPRESSOR B – 1 –... - Page 3 SPECIFICATION INDOOR OUTDOOR Unit TAN3-A70EW TAG3-A70EW 9,600 A1 A2 ; 6,500 2 Cooling Capacity BTU/h – A1orA2 ; 9,700 11,500 Heating Capacity BTU/h A1 A2 ; 7,300 2 – A1orA2 ; 12,000 Moisture Removal A1 A2 ; 1.1 2 –...
- Page 4 SPECIFICATION INDOOR OUTDOOR Unit TAN3-A70EW TAG3-A70EW ; Half Union 1/4'' ; 2-way valve 1/4'' inch Piping Connection Port (Flare piping) ; Half Union 3/8'' ; 3-way valve 3/8'' inch L (liquid side) ; 1/4'' L (liquid side) ; 1/4'' inch Pipe Size (Flare piping) G (gas side) ;...
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Page 5: 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 6: 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 7: 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 8: 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 9: 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 10 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.
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Page 11: 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 12: Heating Mode Operation
OPERATION DETAILS HEATING MODE OPERATION • When room temperature is raised to +6°C higher than the designated temperature, compressor stops. When indoor units in Room A1, A2 are operating simultaneously, even if only A1(or A2) room temperature reachs the designated temperature, the compressor does not stop. The expansion valve of A1(or A2) cycle is closed to regulate refrigerant flow. - 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 temp.+4°C. ROOM TEMP. DESIGNATED TEMP.+6 INDOOR FAN Super low •...
- Page 14 OPERATION DETAILS • Method of overload control by checking the operating current CURRENT OUTDOOR FAN Current(Compressor A) 5.0A 4.7A Current(Compressor B) 4.3A 4.0A • When operation current of compressor A or compressor B or both exceed I in the above table, the outdoor fan is turned off.
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Page 15: Defrosting Operation
OPERATION DETAILS DEFROSTING OPERATION • Defrosting operation is controlled by the temperature of outdoor heat exchanger sensed by the thermistor and the timer switch. • Defrosting operation starts when the both of the following conditions are met at the same time. a) 50 minutes pass the start of heating operation or after the completion of previous defrosting operation. -
Page 16: Refrigeration Cycle Diagram
OPERATION DETAILS REFRIGERATION CYCLE DIAGRAM INDOOR UNIT OUTDOOR UNIT ROOM B REFRIGERANT PIPING CAPILLARY TUBE STRAINAR 2-WAY VALVE EXPANSION VALVE STRAINAR REFRIGERANT PIPING STRAINAR EXPANSION VALVE HEAT EXCHANGER REFRIGERANT PIPING REFRIGERANT HEAT EXCHANGER PIPING ROOM A2 3-WAY VALVE MUFFLER 4-WAY VALVE ACCUMULATOR HEAT EXCHANGER COMPRESSOR B... -
Page 17: 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 18 TROUBLESHOOTING GUIDE INDICATION LAMP Micro computer self-diagnose the points of the troubles and inform it by the combination of the status (On,Flush, or Off)of three lamp indicators on the front panel of the indoor unit. INDICATION LAMP ALARM APPEARANCE, PORTION, PARTS METHOD OF CHECK POWER TIMER...
- Page 19 TROUBLESHOOTING GUIDE CHECK A FOLLOWING STEPS fig. 1 Resistance of transformer Transformer resistance tester resisitance primary red-red about 800 about 170 primary red secondary secondary blue about 3 about 1 blue-blue Check the power source The transformer is located in inner part in the control box/ Measure taking off the connectors (primary &...
- Page 20 TROUBLESHOOTING GUIDE HOW TO DETACH CONTROL BOX AND MAIN CONTROLLER (6) above fixed hock (14) (10) (13) (11) (14) (12) (1) wiring cover How to detach control box assembly (1) Detach wiring cover and connecting cables. (2) Pull out connectors of fan motor. (2 places) (3) Pull out connector of louver motor.
- Page 21 TROUBLESHOOTING GUIDE BLOCK DIAGRAM TAN3-A70EW – 20 –...
- Page 22 TROUBLESHOOTING GUIDE BLOCK DIAGRAM TAG3-A70EW – 21 –...
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Page 23: Wiring Diagram
TROUBLESHOOTING GUIDE WIRING DIAGRAM TAN3-A70EW TAG3-A70EW : BLACK : RED TAN :INDOOR UNIT : BLUE : WHITE TAG :OUTDOOR UNIT : BROWN : YELLOW : GREEN : GRAY : PINK – 22 –... - Page 24 TROUBLESHOOTING GUIDE 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.
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Page 25: 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 26 PERFORMANCE CURVE DIAGRAM COOLING ROOM A1 or A2 operation ROOM B operation CURRENT CURRENT TEMPERATURE TEMPERATURE BLOW OUT BLOW OUT (MPa) (MPa) SERVICE PORT SERVICE PORT PRESSURE PRESSURE HUMIDITY60% HUMIDITY60% AIR TEMPERATURE-OUTDOOR AIR TEMPERATURE-OUTDOOR HEATING AIR-TEMPERATURE AIR-TEMPERATURE ROOM A1 or A2 operation INDOOR 20 ROOM B operation INDOOR 20...
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Page 27: Semiconductor Lead Identification
THERMISTOR RESISTANCE CHART SENSOR, ROOM TEMPERATURE – 38 –... - Page 28 THERMISTOR RESISTANCE CHART – 39 –...
- Page 29 THERMISTOR RESISTANCE CHART SENSOR, HEAT EXCHANGER TEMPERATURE – 40 –...
- Page 30 THERMISTOR RESISTANCE CHART – 41 –...
- Page 31 THERMISTOR RESISTANCE CHART SENSOR, DEFROST TEMPERATURE – 42 –...
- Page 32 THERMISTOR RESISTANCE CHART – 43 –...
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Page 33: Electric Circuit Diagram
ELECTRIC CIRCUIT DIAGRAM TAN3-A70EW – 50 –... - Page 34 ELECTRIC CIRCUIT DIAGRAM TAG3-A70EW – 51 –...
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Page 35: Exploded View (Indoor Unit)
EXPLODED VIEW ( INDOOR UNIT ) TAN3-A70EW – 52 –... -
Page 36: Exploded View (Outdoor Unit)
EXPLODED VIEW ( OUTDOOR UNIT ) TAG3-A70EW – 53 –... - Page 37 PARTS LIST ( INDOOR UNIT ) & & – 54 –...
- Page 38 PARTS LIST ( OUTDOOR UNIT ) – 55 –...
- Page 39 RA-23-[1] ISSUED JUL.2004...