Table of Contents
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Table of Contents
Related Manuals for Toyotomi MTN-MTG A128FS
Summary of Contents for Toyotomi MTN-MTG A128FS
- Page 1 MODEL: MTN-MTG A128FS MTN-MTG A135FS...
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Page 2: Table Of Contents
CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution ........................1 1.2 Warning ............................1 2. Function ................................ 6 3. Dimension ..............................9 3.1 Indoor Units ..........................9 3.2 Outdoor Units ..........................11 4. Refrigerant Cycle Diagram ........................12 5. -
Page 3: Precaution
1. Precaution 1.1 Safety Precaution To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. Before service unit, be sure to read this service manual at first. 1.2 Warning Installation Do not use a defective or underrated circuit breaker. - Page 4 condenser and evaporator. For installation, always contact the dealer or an Authorized service center. There is risk of fire, electric shock, explosion, or injury. Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. Be sure the installation area does not deteriorate with age.
- Page 5 There is risk of explosion or fire. If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire. Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives.
- Page 6 It can avoid vibration of water leakage. Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors. Use two or more people to lift and transport the product. Avoid personal injury.
- Page 7 operated. There are sharp and moving parts that could cause personal injury. Do not drink the water drained from the product. It is not sanitary could cause serious health issues. Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.
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Page 8: Function
Indoor units Operation by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance with the setting temperature. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Indoor fan speed control... -
Page 9: Outdoor Units
Outdoor units Power relay control Low noise air flow system Anti-rust cabinet Made from electrolytic zinc steel sheet and anti-rust coated components. Valve protection cover It protects the valves and prevents water from dripping. -
Page 10: Dimension
3. Dimension 3.1 Indoor Units Figure 1 e 2: Models Figure MTN A128FS Figure 1 MTN A135FS Figure 2... - Page 11 3.2 Outdoor Units More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 70cm Model MTG A128FS MTG A135FS...
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Page 12: Refrigerant Cycle Diagram
4. Refrigerant Cycle Diagram Heating pump mode：... -
Page 13: Wiring Diagram
5. Wiring Diagram 5.1 Indoor Units MTN A135FS MTN A128FS... -
Page 14: Outdoor Units
5.2 Outdoor Units MTN A128FS, MTN A135FS... -
Page 15: Installation Details
6. Installation details 6.1 Wrench torque sheet for installation Additional Outside diameter Torque tightening torque inch N.cm N.cm 1500 1600 Ф6.35 (153kgf.cm) (163kgf.cm) 2500 2600 Ф9.52 (255kgf.cm) (265kgf.cm) 3500 3600 Ф12.7 (357kgf.cm) (367kgf.cm) 4500 4700 Ф16 (459kgf.cm) (479kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. -
Page 16: Pipe Length And The Elevation
6.3 Pipe length and the elevation The pipe length and refrigerant amount: Additional amount of Model Connective pipe length Air purging refrigerant Less than 5m Use vacuum pump ------------------ 9k,12k More than 5m Use vacuum pump (Pipe length – 5) × 20g/m Standard Max. -
Page 17: Installation For The First Time
6.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●... - Page 18 the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
- Page 19 Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position.
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Page 20: Adding The Refrigerant After Running The System For Many Years
6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. -
Page 21: Re-Installation While The Indoor Unit Need To Be Repaired
6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). - Page 22 5). Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 6). Set the 3-way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts.
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Page 23: Re-Installation While The Outdoor Unit Need To Be Repaired
Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. - Page 24 2. Refrigerant charging Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
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Page 25: Operation Characteristics
Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 7. Operation characteristics Temperature Heating Cooling operation Drying operation Mode operation 10℃～32℃ (<21000Btu/h models) Room temperature 17℃～32℃ 0℃～30℃ 17℃～32℃ (≥21000Btu/h models) 11℃～43℃... -
Page 26: Electronic Function
8. Electronic function 8.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Auto indicator: This indicator illuminates when the air conditioner is in AUTO operation. -
Page 27: Main Protection
8.3 Main Protection 8.3.1 Time Delay at restart for compressor. 8.3.2 Fan Speed is out of control. ----When Indoor Fan Speed keeps too low or too high for certain time, the unit will stop and the LED will display the failure 8.3.3 Current protection I3SEC I5MIN... - Page 29 8.4.2 Cooling Mode 8.4.2.1 Compressor running rules: Once the compressor starts up, it will follow the below rules: When indoor room temp.T1 is lower than Tn, the compressor and outdoor fan will shut off. When T1 is higher than Tm, the compressor and outdoor fan will start up. Tm=Ts+1, Tn=Ts.
- Page 30 8.4.2.4 Evaporator low temperature T2 protection. When the evaporator coil temp.T2 keeps lower than TE5 for 5 minutes(4 minutes for 21k model), the compressor and outdoor fan will shut off. When T2 is higher than TE6, the compressor and outdoor fan will restart up. 8.4.3 Heating Mode 8.4.3.1 Compressor running rules: For the models, they will follow the below rules once the compressors start up:...
- Page 31 T2<TE4, the indoor fan will shut off. While TE1=28 ,TE2=32 ,TE3=30 ,TE4=26 for MTN A128FS TE1=34 ,TE2=37 ,TE3=33 ,TE4=26 for MTN A135FS model. Auto fan action: When T1-Ts>2 , the indoor fan will run at low speed. When T1-Ts≤0 , the indoor fan will run at medium speed. 8.4.3.4 High evaporator coil temp.T2 protection: Compressor off Outdoor fan off...
- Page 32 8.4.3.5 Defrosting mode： For 9k,12k models: Condition of defrosting: AC will enter defrosting mode if any of the following items is satisfied. (1) Both A and B are satisfied A: The compressor keeps running for 40 minutes. B: The evaporator coil temp.T2-Indoor room temp.T1 meets the below table. T2－T1 ＜TH High speed...
- Page 33 (1) The defrosting time is reached to the setting value. (2) The compressor current reaches or exceeds I for 7 seconds. DEFROST =6.5A for MTN A128FS model. DEFROST Defrosting action： About the setting defrosting time: (1) Condition 1 of defrosting; If case B happens before case A and lasts till case A happens, the setting defrosting time is 10 minutes.
- Page 34 3) Defrosting action： ℃ T2-T1 Note Fan speed ＜TH High If indoor fan is in high speed and T2-T1< TH , start defrosting DEFROST DEFROST ＜TM Medium If indoor fan is in medium speed and T2-T1< TM , start defrosting DEFROST DEFROST ＜TL...
- Page 35 Defrosting actions： During the defrosting mode, if the machine stopped or transferred to other mode, the defrosting mode will stop, and all the defrosting conditions will be cleared. 8.4.4 Auto-mode The machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts). ΔT=T1-Ts Running mode Cooling...
- Page 36 Running rules: Condition Indoor fan Compressor and outdoor fan 6 minutes T1 ≥ TS+2 Breeze OFF 4 minutes 5 minutes TS ≤T1＜TS+2 Breeze OFF 5 minutes 4 minutes T1 ＜ TS Breeze OFF 6 minutes 8.4.5.2 In drying mode, if room temperature is lower than 10 , the indoor fan will run at breeze while the compressor and outdoor fan will stop and not resume until room temperature exceeds 13 .
- Page 37 then turn off automatically when reaching the setting “off” time. 8.4.7.5 Timer off/on. The machine will turn off automatically when reaching the setting “off” time, and then turn on automatically when reaching the setting “on” time. 8.4.7.6, the timer function will not change the AC current operation mode. Suppose users set the “timer off”...
- Page 38 again to stop the function. During the time when Ionizer being controlled by remote controller, Ionizer will be turned off automatically, if indoor fan stops running due to malfunctions or anti-cold-wind. When indoor fan restarts after malfunctions being eliminated and anti-cold-wind being released, Ionizer will be available again.
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Page 39: Troubleshooting
9. Troubleshooting 9.1 Indoor unit error display Operation lamp Timer lamp Failure Indoor fan speed has been out of control The T1 or T2 sensor is open circuit or short circuit Over current protection occurs 4 times. EEPROM error Zero crossing detection error （light）... -
Page 40: Diagnosis And Solution
9.2 Diagnosis and Solution 9.2.1 Indoor fan speed out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit, rotate the cross Disassemble the connection between fan. - Page 41 9.2.2 Open or short circuit of temperature sensor diagnosis and solution. Check the connections between the sensors and the PCB. Are the connections good? Replace the sensor and check if Replace outdoor PCB the errors happen again? 9.2.3 Over current protection occurs 4 times.
- Page 42 9.2.4 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later Replace indoor PCB The problem comes out again Is the EEPROM chip plugged in indoor PCB well? Correct the connection Replace the main PCB of indoor unit 9.2.5 Zero crossing detection error When such failure occurs, the main control board must have fault.
- Page 43 9.2.6 Indoor / outdoor units communication error Turn off the power supply, after 1 minute, connect the power supply , turn on the unit with remote controller The unit does not work normally. Check the wiring between indoor and outdoor unit.