Table of Contents
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SERVICE MANUAL
ROOM AIR CONDITIONER
TAN/TAG-A70IV(A)
CONTENTS
SPECIFICATION .................................................................... 1
FUNCTIONS .......................................................................... 7
SERVICE FUNCTION EXPLANATION .................................. 9
OPERATION DETAILS......................................................... 10
TROUBLESHOOTING GUIDE ............................................. 16
PERFORMANCE CURVE DIAGRAM .................................. 22
ELECTRIC CIRCUIT DIAGRAM .......................................... 26
SCHEMATIC DIAGRAM AND PCB'S .................................. 30
PARTS LIST (PCB) .............................................................. 40
SEMICONDUCTOR LEAD IDENTIFICATION ...................... 54
SEMICONDUCTOR PIN FUNCTION ................................... 58
THERMISTOR RESISTANCE CHART ................................. 63
EXPLODED VIEW (INDOOR UNIT) .................................... 71
EXPLODED VIEW (OUTDOOR UNIT) ................................ 74
PARTS LIST (INDOOR UNIT) .............................................. 76
PARTS LIST (OUTDOOR UNIT) .......................................... 77
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Summary of Contents for Toyotomi TAN-A70IV
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Page 1: Table Of Contents
SERVICE MANUAL ROOM AIR CONDITIONER TAN/TAG-A70IV(A) CONTENTS SPECIFICATION ..............1 FUNCTIONS ................7 SERVICE FUNCTION EXPLANATION ........9 OPERATION DETAILS............10 TROUBLESHOOTING GUIDE ..........16 PERFORMANCE CURVE DIAGRAM ........22 ELECTRIC CIRCUIT DIAGRAM .......... 26 SCHEMATIC DIAGRAM AND PCB’S ........30 PARTS LIST (PCB) .............. -
Page 2: Specification
SPECIFICATION INDOOR OUTDOOR Unit TAN-A70IV(A) TAG-A70IV(A) Cooling Capacity BTU/h 22,000(5,100-22,800) – 24,500(7,100-25,700) Heating Capacity BTU/h – Moisture Removal – Single phase Power source SIDE VIEW TOP VIEW OUTLET Airflow Method INTAKE Cooling ; 12.0 Air circulation (at High) – m/min 12.0... - Page 3 SPECIFICATION INDOOR OUTDOOR Unit TAN-A70IV(A) TAG-A70IV(A) 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 21.1FPI 18.1FPI Capillary Tube Refrigerant Control Device – 1,400(49.5) g (oz) – Refrigerant (R410A )
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Page 4: 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. COOL Indoor fan speed control HEAT High, Med, Low AUTOMATIC CIRCULATION Operation indication lamps (LED) Air flow selection POWER (GREEN) -
Page 5: Outdoor Unit
FUNCTIONS OUTDOOR UNIT Hot-start control (heating) The indoor fan stops until the evaporator piping temperature will be reached. 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 2°C. -
Page 6: 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. In this operation, the system automatically selects the operation modes, cooling •... -
Page 7: Operation Details
OPERATION DETAILS TIMER OPERATION ON Timer operation • Press the ON/OFF switch. Right after replacing new batteries, set the present time in advance. • Set the “ON Time” : Press the “TIME ADJ” button twice. Adjust the time with the “ ”... -
Page 8: 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 360 seconds of its operation even if the room temperature reaches •... -
Page 9: Dry Mode Operation
OPERATION DETAILS DRY MODE OPERATION The compressor will stop when operational frequency reached the minimum frequency and that condition has • been kept for 360 seconds and the room temperature becomes 1.3°C lower than it was set. The compressor will re-start when room temperature becomes 0.7°C higher than it was set. •... -
Page 10: Heating Mode Operation
OPERATION DETAILS HEATING MODE OPERATION The compressor will stop when operational frequency reached the minimum frequency and that condition has • been kept for 360 seconds and the room temperature becomes 5.0°C higher than it was set. The compressor will re-start when room temperature becomes 3.0°C higher than it was set. •... - Page 11 OPERATION DETAILS DEFROSTING OPERATION(FOR OUTDOOR UNIT HEAT EXCHANGER) 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. •...
- Page 12 OPERATION DETAILS COMPRESSOR STARTING SEQUENCE 10Hz T(Max) Start Frequency Model Number Time T(Max) 60Hz 92Hz 82Hz 20Hz Cooling 1.5min. 25min. limitless TAN/TAG-A70IV(A) 60Hz 88Hz 80Hz 30Hz Heating 1.5min. 40min. limitless T1: Forced rotating to reach 10Hz F2: Forced frequency for lubricant back –...
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Page 13: Troubleshooting Guide
TROUBLESHOOTING GUIDE FOR YOUR SAFETY USE RC: indoor unit AE : 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 14 TROUBLESHOOTING GUIDE INDICATION LAMP 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 METHOD OF CHECK APPEARANCE, PORTION, PARTS...
- Page 15 TROUBLESHOOTING GUIDE INDICATION LAMP ALARM APPEARANCE, PORTION, PARTS METHOD OF CHECK ELECT TIMER OPERATE INDICATION TIME SEEMED WRONG (press the ON/OFF button of remote controller in case of reset) (green) (yellow) (green) check the point of leakage measure the pressure of compressor GAS LEAKAGE during fixed operation (emergency and test operation) SENSOR, TEMP.
- Page 16 TROUBLESHOOTING GUIDE ELECTRIC CHARACTER ELECTRIC CHARACTER ftable 2 Sensor, temp. defrost ftable 1 Sensor, temp. room ftable 3 Sensor, temp. discharge Sensor, temp. heat exchanger Sensor, temp. outdoor Resistance (k Temp. (°C) Resistance (k Temp. (°C) Temp. (°C) Resistance (k 1,130 ftable 4 Sensor, temp.
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Page 17: Wiring Diagram
TROUBLESHOOTING GUIDE WIRING DIAGRAM TAN-A70IV(A) MOTOR (FAN) (RECEIVER &DISPLAY) SENSOR (TEMP.,HEAT EXCHANGER) SENSOR (TEMP.,ROOM) FUSE 250V (CONTROLLER) MOTOR T3.15A (LOUVER) MANUAL SWITCH POWER SOURCE TERMINAL 3 2 1 BLOCK EARTH OUTDOOR UNIT TERMINAL TAG-A70IV(A) MOTOR SENSOR (FAN) SENSOR (TEMP.,DISCHARGE) COMPRESSOR (TEMP.,... -
Page 18: Performance Curve Diagram
PERFORMANCE CURVE DIAGRAM REMARKS FOR GAS PRESSURE CHECK AND CHARGING Gas pressure is to be measured at TEST OPERATION for cooling or EMERGENCY OPERATION for heating. (It is operated for 30 minutes at fixed frequency.) If you find substantial diffrence in performance compared with PERFORMANCE CURVE as shown next, recharge the refrigerant. - Page 19 PERFORMANCE CURVE DIAGRAM COOLING CURRENT (°C) TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE (°C) HUMIDITY60% AIR TEMPERATURE INDOOR-OUTDOOR HEATING AIR-TEMPERATURE INDOOR 20°C CURRENT (°C) TEMPERATURE BLOW OUT (MPa) SERVICE PORT PRESSURE (°C) HUMIDITY50% AIR TEMPERATURE INDOOR-OUTDOOR – 18 –...
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Page 20: Thermistor Resistance Chart
THERMISTOR RESISTANCE CHART SENSOR, ROOM TEMPERATURE RC SENSOR, ROOM TEMPERATURE B CONSTANT 4150 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • °C STANDARD TEMPERATURE 25.0... - Page 21 THERMISTOR RESISTANCE CHART RC SENSOR, ROOM TEMPERATURE B CONSTANT 4150 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 25.0°C •...
- Page 22 THERMISTOR RESISTANCE CHART SENSOR, HEAT EXCHANGER TEMPERATURE RC SENSOR, HEAT EXCHANGER TEMPERATURE B CONSTANT 3700 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 25.0°C •...
- Page 23 THERMISTOR RESISTANCE CHART RC SENSOR, HEAT EXCHANGER TEMPERATURE B CONSTANT 3700 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 25.0°C •...
- Page 24 THERMISTOR RESISTANCE CHART SENSOR, DEFROST TEMPERATURE & OUTDOOR TEMPERATURE AE SENSOR, DEFROST TEMPERATURE & OUTDOOR TEMPERATURE B CONSTANT 3700 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 25.0°C •...
- Page 25 THERMISTOR RESISTANCE CHART AE SENSOR, DEFROST TEMPERATUR & OUTDOOR TEMPERATUREE B CONSTANT 3700 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 25.0°C •...
- Page 26 THERMISTOR RESISTANCE CHART SENSOR, DISCHARGE TEMPERATURE AE SENSOR, DISCHARGE TEMPERATURE B CONSTANT 4250 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATURE 80.0°C •...
- Page 27 THERMISTOR RESISTANCE CHART AE SENSOR, DISCHARGE TEMPERATURE B CONSTANT 4250 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • STANDARD TEMPERATUR 80.0°C •...
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Page 28: Exploded View (Indoor Unit)
EXPLODED VIEW ( INDOOR UNIT ) TAN-A70IV(A) accessories – 51 –... -
Page 29: Exploded View (Outdoor Unit)
EXPLODED VIEW ( OUTDOOR UNIT ) TAG-A70IV(A) – 52 –... -
Page 30: Parts List (Indoor Unit)
PARTS LIST ( INDOOR UNIT ) PARTS NAME TAN-A70IV(A) CONTROLLER ASSY. 2054294 0 PCB (MAIN) 3009471 0 PCB (RECEIVER & DISPLAY) 2047192 0 SENSOR(TEMP,ROOM) 3005507 0 SENSOR(TEMP,HEAT EXCHAGER) TERMINAL BLOCK 5162084 0 CORD,POWER SUPPLY 5196643 0 FRONT PANEL ASSY. 2047189 0... -
Page 31: Parts List (Outdoor Unit)
PARTS LIST ( OUTDOOR UNIT ) PARTS NAME TAG-A70IV(A) TOP PANEL ASSY. 2046539 0 SIDE PANEL ASSY. 2003575 1 BOTTOM PANEL ASSY. 2045045 3 WIRING LID 2004642 0 PROPELLER FAN 5263019 0 MOTOR 3006753 0 BRACKET, MOTOR 2003591 0 COMPRESSOR 3006761 0 TERMINAL BLOCK 5162082 0... - Page 32 RA-64-[2] ISSUED MAY.2008 REVISED SEP.2008 Printed in Japan...