Turbo Air TAS-18EHN Service Manual
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Turbo Air TAS-18EHN Service Manual

Turbo Air TAS-18EHN Service Manual

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TAS-18EHN, TAS-24EHN

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Summary of Contents for Turbo Air TAS-18EHN

  • Page 1 Service Manual for TAS-18EHN, TAS-24EHN...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ................................ 7 3. Dimension ..............................8 3.1 Indoor Unit ............................. 8 3.2 Outdoor Unit ..........................10 4. Refrigerant Cycle Diagram ........................11 5. Wiring Diagram ............................12 5.1 Indoor Unit ...........................

  • 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 the unit, be sure to read this service manual at first. 1.2 Warning ...
  • Page 4 condenser and evaporator.  For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
  • Page 5 There is risk of property damage, failure of product, or electric shock.  Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure. ...
  • Page 6 could cause product malfunction or inefficient operation.  Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  Do not use the product for special purposes, such as preserving foods, works of art etc. It is a consumer air conditioner, not a precision refrigerant system.

  • Page 7: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units TAS-09EHN TAS-09EHN/O TAS-12EHN TAS-12EHN/O Inverter TAS-18EHN TAS-18EHN/O TAS-24EHN TAS-24EHN/O...

  • Page 8: Dimension

    3. Dimension 3.1 Indoor Unit Model TAS-09EHN TAS-12EHN TAS-18EHN TAS-24EHN 1186 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) TAS-09EHN ￠65 TAS-12EHN...
  • Page 9 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) ￠65 TAS-18EHN Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) ￠65 TAS-24EHN...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 70cm Model TAS-09EHN/O TAS-12EHN/O TAS-18EHN/O TAS-24EHN/O...

  • Page 11: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram INDOOR OUTDOOR Electronic Expansion Valve LIQUID SIDE CAPILIARY TUBE 2-WAY VALVE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 12: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit TAS-09EHN, TAS-12EHN, TAS-18EHN TAS-24EHN...

  • Page 13: Outdoor Unit

    5.2 Outdoor Unit TAS-09EHN/O, TAS-12EHN/O TAS-18EHN/O...
  • Page 14 TAS-24EHN/O...

  • Page 15: Installation Details

    6 Installation Details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²) >3 and ≤6...

  • Page 16: Pipe Length And The Elevation

    (g/m) TAS-09EHN + TAS-09EHN/O 3/8’’ 1/4’’ (Ф9.52) (Ф6.35) TAS-12EHN + TAS-12EHN/O 1/4’’ 1/2’’ TAS-18EHN + TAS-18EHN/O (Ф12.7) (Ф6.35) 3/8’’ 5/8’’ TAS-24EHN + TAS-24EHN/O (Ф15.9) (Ф9.52) Caution: The capacity test is based on the standard length and the maximum permissive length is based on the system reliability.

  • 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.

  • 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.

  • 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 Be sure to use a hexagonal wrench to operate the valve stems.
  • 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.
  • Page 25 Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage...

  • Page 26: Operation Characteristics

    7. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode ≥17℃ ≤30℃ ＞10℃ Room temperature 0℃～50℃ -15℃～50℃ Outdoor temperature -15℃～30℃ 0℃～50℃ (For the models with low temperature cooling system) CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

  • Page 27: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. ION indication lamp(optional function)：This lamp illuminates when Clean Air feature is activated.

  • Page 28: Main Protection

    8.3 Main Protection 8.3.1 Three Minutes Delay at restart for compressor 1 minute delay for the 1 time start-up and 3 minutes delay for others. 8.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.
  • Page 29 If T4＞5℃ or the compressor starts running, the preheating function will stop.

  • Page 30: Operation Modes And Functions

    (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode. (5) Auto fan: For TAS-09EHN, TAS-12EHN, TAS-18EHN models: T1-24 (H-L)*0.75+L (H-L)*0.5+L (H-L)*0.25+L...
  • Page 31 Fmax=F4 Fmax=F7 Fmax=F8 31.5 29.5 Fmax=F6 Fmax=F3 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp. During the 7 minutes, the frequency limitation is active. 7 minutes later, the compressor running frequency will be controlled as below: -0.5 -1.0...
  • Page 32 In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent mode. When the compressor is running, the indoor fan is controlled as below: For TAS-09EHN, TAS-12EHN, TAS-18EHN models:...
  • Page 33 Auto fan running rules: For TAS-09EHN, TAS-12EHN, TAS-18EHN models: T1-Ts (H-L)*0.75+L (H-L)*0.5+L (H-L)*0.25+L For TAS-24EHN model: High Medium 25.5 8.4.2.4 Condenser temperature protection ---55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1.If T3<54℃, the compressor will keep running at the current frequency.
  • Page 34 >= ---T2<0℃, the compressor will stop and restart when T2 5℃. ---0℃≦T2<4℃, the compressor frequency will be limited and decreased to the lower level ---4℃≤T2≤7℃, the compressor will keep the current frequency. ---T2>7℃, the compressor frequency will not be limited. 8.4.3 Heating Mode 8.4.3.1 Compressor running rules: The maximum operation frequency of the compressor after starting submits to the following rule.
  • Page 35 +5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 While the zones of A,B,C... are corresponding to different compressor running frequency. ΔT=0℃ as default. Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A~E: Increase the frequency to the higher level until to F10.
  • Page 36 Resume: No limitation for frequency. Note: When AC is in “hold” zone for 3 minutes, the compressor frequency will rise to the higher level. (The frequency will increase twice at most) 8.4.3.2 Outdoor fan running rules 8.4.3.3 Indoor fan running rules Indoor fan speed can be set as high, medium, low, silent mode or auto grade.
  • Page 37 The anti-cold wind function is as below: Auto fan action in heating mode. For TAS-09EHN, TAS-12EHN, TAS-18EHN models: T1-Ts+¦ ¤ T (H+-L)*0.2+L -1.0 (H+-L)*0.4+L -2.0 -3.0 (H+-L)*0.6+L -4.0 (H+-L)*0.8+L -5.0 -6.0 -6.5 For TAS-24EHN model: T1-Ts Medium High 8.4.3.4 Defrosting mode Condition of defrosting: ----T4＞0℃,...
  • Page 38 The units run with T3＜3℃ for 80 minutes and T3 keeps lower than TCDI+2℃ for more than 3 minutes. ----T4＜0℃, If the 1 condition and 2 condition items are satisfied, then the program judges if T2 has decreased more than 5℃.When T2 has decreased more than 5℃, enter the defrosting mode. ----No matter what value of the T4 is and whether the T2 drops more than 5℃...
  • Page 39 Frequency F2 Frequency F8 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m XX=90s 8.4.3.5 Evaporator coil temperature protection ----T2> TEH2℃, the compressor running frequency decreases to the lower level and runs for 20s. When the frequency decreases to F2 and the T2 is still over TEH2℃ for 3 minutes, the compressor will stop.
  • Page 40 ΔT≤-1℃ Heating Indoor fan will run at auto fan of the relevant mode. The louver operates same as in relevant mode. If the machine switches mode between heating and cooling, the compressor will keep stopping for 15 minutes and then choose mode according to T1-Ts. If the setting temperature is modified, the machine will choose running function again.
  • Page 41 8.4.6 Oil return 8.4.6.1 If the compressor running frequency is lower than 35Hz for 80 minutes, the frequency will be raised to 58 Hz .The unit will keep running at 58Hz for 60 seconds and then run at former frequency. 8.4.6.2 If the unit is in defrosting mode, the oil return function is inactive.
  • Page 42 LED will be off and the AC running mode has not been changed. 8.4.8.7 The setting time is relative time. 8.4.9 Sleep function mode 8.4.9.1 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and turns off. 8.4.9.2.
  • Page 43 according to the temperature from follow me signal, and the temperature collection function of room temperature sensor will be shielded, but the error detective function of room temperature sensor will be still valid. When the follow me function is available, the PCB will control the unit according to the room temperature from the remote controller and the setting temperature.
  • Page 44 the room temperature steady at 8℃ and prevents household things freezing when the house is unoccupied for a long time in severe cold weather. 8.4.16 Silence operation(optional) Press the “silence” button on remote controller to initiate SILENCE function. When the Silence function is activated, the compressor running frequency will keep lower than F2 and the indoor unit will bring faint breeze, which will reduce the noise to the lowest level and create a quiet and comfortable room for you.

  • Page 45: Troubleshooting

    9. Troubleshooting 9.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 46: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution(E0) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? If the EEPROM chip is welded on main PCB, replace the main PCB directly.
  • Page 47 9.2.2 Indoor / outdoor units communication error diagnosis and solution(E1) Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check all the wirings between indoor and outdoor, indoor main PCB and outdoor main PCB following the wiring diagram.
  • Page 48 9.2.3 Fan speed has been out of control diagnosis and solution(E3/E7) Shut off the power supply and turn it on 5 seconds The unit operates normally. later. Is it still displaying the error code? Find out the cause and have it solved. For Shut off the power supply, example, check rotate the fan by hand.
  • Page 49 Index 1: 1.Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Measure the resistance value of each winding by using the tester. If any resistance value is zero, the fan motor must has problems and need to be replaced. Index2: 1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor...
  • Page 50 9.2.4 Open circuit or short circuit of temperature sensors diagnosis and solution(E5/E6) Check the connections between temperature sensor and main PCB. Correct the connections. Are the connections good? Check the resistance value Replace indoor or outdoor main of the sensor via table1 PCB.
  • Page 51 9.2.5 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 52 9.2.6 Over voltage or over low voltage protection diagnosis and solution (P1) Disconnect the unit with power Check if the power supply is supply and try to restart the unit normal. when power supply gets normal. Check if all the connections Correct the connections or replace and wires are good? the wires.
  • Page 53 9.2.7 High temperature protection of compressor top diagnosis and solution (P2) Check if the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units exchanger of indoor and outdoor units. are obstructed? Turn off the power supply and turn it on 10 minutes later.
  • Page 54 9.2.9 Inverter compressor drive error diagnosis and solution (P4) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 55 Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.
  • Page 56 Resistance Value (KΩ) 141.6 56.1 36.6 13.8 Resistance value (KΩ) T1,T2,T3,T4 Temperature (℃) Spec. Code 2T0032300751 2T0032500565 2T0032800540 Indoor code 220032308100 220032506380 220032805110 Indoor TAS-09EHN TAS-12EHN TAS-18EHN Outdoor code 220037305700 220037505200 220037803940 Outdoor TAS-09EHN/O TAS-12EHN/O TAS-18EHN/O Compressor DA110S1C-30FZ DA110S1C-30FZ DA130M1C-31FZ...
  • Page 57 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value DA110S1C-30FZ DA130M1C-31FZ Blue - Red 0.8Ω 1.77Ω Blue - Black (20℃) (20℃) Red - Blue 3.IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN;...

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Tas-24ehn

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