DuctlessAire DA1215-H1 Service Manual
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DuctlessAire DA1215-H1 Service Manual

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Ductless
Revision A: 1403100001, Content updated.
Model Numbers:
DA1215-H1
DA1815-H2
DA2415-H2

Table of Contents

1.
2.
3.
Specification
4.
5.
6.
7.
8.
9.
11. Disassembly Instructions
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.
Ductlessaire
mini split
SERVICE MANUAL
Mono DC

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Summary of Contents for DuctlessAire DA1215-H1

  • Page 1: Table Of Contents

    Ductless Ductlessaire mini split Mono DC SERVICE MANUAL Revision A: 1403100001, Content updated. Model Numbers: DA1215-H1 DA1815-H2 DA2415-H2 Table of Contents Precaution Part Names And Functions Specification Dimension Refrigerant Cycle Diagram Wiring Diagram Installation Details Operation Characteristics Electronic Function 10. Troubleshooting 11.
  • Page 2 CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Part Names And Functions ......................... 4 2.1 Model Names of Indoor/Outdoor units ..................4 2.2 Part names of Indoor/Outdoor units ....................5 2.3 Functions of Indoor/Outdoor units ....................6 3.

  • Page 3: Precaution

    Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1. Precaution condenser and evaporator.  For installation, always contact the 1.1 Safety Precaution dealer or an authorized service center.   To prevent injury to the user or other Do not install the product on a people and property damage, the following defective installation stand.
  • Page 4 There is risk of electric shock or fire. product.  Stop operation and close the window It can avoid vibration of water leakage.  in storm or hurricane. If possible, remove Do not install the product where the the product from the window before the noise or hot air from the outdoor unit could hurricane arrives.
  • Page 5  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.

  • Page 6: Part Names And Functions

    2. Part Names And Functions 2.1 Model Names of Indoor/Outdoor units Series Capacity Indoor units Outdoor units DA1215-H1-I DA1215-H1-O Inverter DA1815-H2-I DA1815-H2-O DA2415-H2-I DA2415-H2-O...

  • Page 7: Part Names Of Indoor/Outdoor Units

    2.2 Part names of Indoor/Outdoor units...

  • Page 8: Functions Of Indoor/Outdoor Units

    2.3 Functions of Indoor/Outdoor units Filter Cold Catalyst Filter Ionizer(O) Silver Ion Filter Louver Position Memory Function Vitamin C Filter(O) Refrigerant Leakage Detect 8 Degree Heating(O) 3M HAF Filter(O) Heat Compensation(O) Bio Filter(O) Self-diag. Function Golden Fin(O) PTC Heating Belt(O) Self Clean(O) Compressor Crankcase Heater Follow Me(O)
  • Page 9  Cold Catalyst Filter: Eliminate formaldehyde and other volatile organic compounds as well as harmful gases and odors.  Ionizer: Release negative ions, eliminate odor, dust, smoke and pollen particles to give you fresh and healthy air.  Silver Ion Filter: Sterilize bacteria effectively by decomposing cell wall of bacteria.

  • Page 10: Dimension

    3. Dimension 3.1 Indoor Unit Model 770mm 188mm 255mm DA12-H1-I (30.3in) (7.4in) (10.0in) 905mm 198mm 275mm DA18-H2-I (35.6in) (7.8in) (10.8in) 1030mm 218mm 315mm DA24-H2-I (40.6in) (8.6in) (12.4in)

  • Page 11: Outdoor Unit

    Model R(mm) L(mm) H(mm) Dimension of installation hole(mm) DA1215-H1-I 95mm 170mm 45mm Φ65mm(2.56in) (3.7in) (6.7in) (1.8in) 80mm 100mm 45mm DA1815-H1-I (3.1in) (3.9in) (1.8in) Model R(mm) L(mm) H(mm) Dimension of installation hole(mm) 163mm 293mm 45mm Φ65mm(2.56in) DA2415-H1-I (6.4in) (11.5in) (1.8in) 3.2 Outdoor Unit...
  • Page 12 More than 30cm(11.8in) More than 60cm(23.6in) (Service space) More than 30cm(11.8in) More than 60cm(23.6in) More than 70cm(27.6in) Note: The above drawing is only for reference. The appearance of your units may be different. DA1215-H1-O (30.7in) (9.8in) (21.3in) (33.2in) (21.6in) (10.9in)

  • Page 14: Refrigerant Cycle Diagram

    5. Refrigerant Cycle Diagram For cooling only models: INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR...
  • Page 15 For heat pump models: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 16: Wiring Diagram

    6. Wiring Diagram 6.1 Indoor Unit 12000 BTU 115 VOLT 18000 BTU 220 VOLT 24000 BTU 220 VOLT...

  • Page 18: Outdoor Unit

    6.2 Outdoor Unit DA1215-H1-O...
  • Page 19 DA1815-H2-O...
  • Page 20 DA2415-H2-O...
  • Page 21 For DA1215-H1-O...
  • Page 22 For DA1815-H2-O For DA2415-H2-O...

  • Page 24: Installation Details

    Pipe size 7 Installation Details Models Liquid 7.1 Wrench torque sheet for installation 3/8in 1/4in DA1215-H1 Additional tightening (Ф9.52mm) (Ф6.35mm) Outside diameter Torque torque 1/2in 1/4in DA1815-H2 Ф6.35mm 1/4in 1500N.cm(153kgf.cm) 1600N.cm(163kgf.cm) (Ф12.7mm) (Ф6.35mm) 5/8in 3/8in DA2415-H2 Ф9.52mm 3/8in 2500N.cm(255kgf.cm) 2600N.cm(265kgf.cm) (Ф15.9mm)

  • Page 25: Installation For The First Time

    connection to the vacuum pump. 4) Fully open the handle Lo of the manifold 7.4 Installation for the first time valve. Air and moisture in the refrigerant system have 5) Operate the vacuum pump to evacuate. undesirable effects as below: 6) Make evacuation for 30 minutes and check whether the compound meter indicates ●...

  • Page 26: Adding The Refrigerant After Running The System For Many Years

    operate the valve stems. Use torque wrench to tighten the service port 7). Mount the valve stems nuts and the service cap to a torque of 18N.m. port cap. Be sure to check for gas leakage. Be sure to use a torque wrench to tighten the 7.6 Re-installation while the indoor unit service port cap to a torque 18N·m.

  • Page 27: Re-Installation While The Outdoor Unit Need To Be Repaired

    Procedure: Procedure: 1). Confirm that both the 2-way and 3-way 1). Confirm that both the 2-way and 3-way valves are set to the closed position. valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s 2).
  • Page 28 2. Refrigerant charging to check for gas leakage. 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. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.

  • Page 29: Operation Characteristics

    8. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode ＞10℃ ≥17℃ ≤30℃ Room temperature (62℉) (86℉) (50℉) 0℃～50℃ (32℉～122℉) -15℃～30℃ 0℃～50℃ -15℃～50℃ Outdoor temperature (5℉～122℉) (5℉～86℉) (32℉～122℉) (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 30: Electronic Function

    9. Electronic Function 9.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 9.2 Display function 9.2.1 Icon explanation on indoor display board. This indicator illuminates when the Defrost air conditioner starts defrosting Indicator...

  • Page 31: Main Protection

    9.3 Main Protection Preheating mode: A weak current flow through the coil of 9.3.1 Three minutes delay at restart for compressor from the wiring terminal of the compressor compressor, then the compressor is heated 1 minute delay for the 1 time stand-up and 3 without operation.

  • Page 32: Operation Modes And Functions

    9.4 Operation Modes and Functions If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 9.4.1 Fan mode minutes according to the outdoor ambient temp. (1) Outdoor fan and compressor stop. During the 7 minutes, the frequency limitation is (2) Temperature setting function is disabled, active.
  • Page 33 In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. I3COOL Auto fan in cooling mode acts as follow: Decrease I2COOL Hold I1COOL High Resume Medium I3COOL, I2COOL,I1COOL mean different running current value.
  • Page 34 operation frequency. If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 I3HEAT minutes according to outdoor ambient temp. Decrease During the 7 minutes, the frequency limitation is I2HEAT active. 7 minutes later, the compressor running frequency will be controlled as below: Hold I1HEAT...
  • Page 35 If the compressor stops caused by the room ----T3 rises to be higher than TCDE1℃. temperature rising, the indoor fan will be forced ----T3 keeps to be higher than TCDE2℃ for 80 to run 127 seconds with breeze. During this seconds.
  • Page 36 When the frequency decreases to F2 （F1 for Condition of defrosting: and the T2 is still over TEH2℃ for 3 minutes, If any one of the following items is satisfied, AC the compressor will stop. will enter the defrosting mode. ----T2<48℃...
  • Page 37 9.4.5.3 Low indoor room temperature protection 9.4.7.6 The timer function will not change the In drying mode, if room temperature is lower AC current operation mode. Suppose AC is off than 10℃, the compressor will stop and not now, it will not start up firstly after setting the “timer off”...
  • Page 38 minute delay when power on. Other conditions, the air conditioner can be as lower as 8℃, the compressor will have 3 minutes delay when which keeps the room temperature steady at 8℃ restarts. and prevents household things freezing when the house is unoccupied for a long time in 9.4.10 8℃...

  • Page 39: Troubleshooting

    10. Troubleshooting 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!) For other models, please 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 40: Indoor Unit Error Display

    10.1 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 ☆ 3 times Zero-crossing signal detection error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 41: Outdoor Unit Error Display

    10.2 OUTDOOR UNIT ERROR DISPLAY  DA1215-H1-O: There’s a LED light on the outdoor PCB which is blue color. After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if the unit has some problems.
  • Page 42  DA1815-H2-O: LED3 & LED4 LED2 LED1 (red) (green) (yellow) (red) standby operating LED2 slow flashing(0.2Hz) LED1 The picture of PCB above is only for reference. LED 1 is a red light and for the PCB POWER display. LED 2 is a yellow light. After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if the unit has some problems.
  • Page 43 LED4 LED3 Problems IU display (Green) (Red) standby for normal Operation normally ☆ IPM malfunction or IGBT over-strong current protection Over voltage or too low voltage protection ☆ Over voltage or too low voltage protection ☆ Inverter compressor drive error ☆...

  • Page 44: Diagnosis And Solution

    10.3 Diagnosis and Solution 10.3.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: Shut off the power supply and turn it on 5 seconds later.
  • Page 45 10.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 46 Remark: Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit. The red pin of multimeter connects with L2 port while the black pin is for S port. When AC is normal running, the voltage will move alternately between -50V to 50V.
  • Page 47 10.4.3 Zero crossing detection error diagnosis and solution(E2) Error Code Malfunction decision When PCB does not receive zero crossing signal feedback for 4 conditions minutes or the zero crossing signal time interval is abnormal. Supposed causes Connection mistake ● PCB faulty ●...
  • Page 48 10.4.4 Fan speed has been out of control diagnosis and solution(E3) Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 49 Index 1: 1.Indoor AC fan motor Measure the resistance value of each winding by using the tester. For the definite value of the resistance, refer to page61 and page64. Index2: 1: Indoor AC fan motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2.
  • Page 50 connector. If the value is not 5V, change the PCB. Otherwise, go to step 3. 3) Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal connector. If any voltage is not positive voltage fluctuation, the fan motor must has problems and need to be replaced.
  • Page 51 10.4.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ● Sensor faulty ●...
  • Page 52 10.4.6 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC”...
  • Page 53 PCB and IPM are separate. Remark： DA1215-H1-I models: Measure the black pin and red pin of the motor connector, the resistance should be around 293Ω at 20℃(68℉) DA1815-H2-I models: Measure the black pin and red pin of the motor connector, the resistance should be around 84.5Ω...
  • Page 56 10.4.8 Over voltage or too low voltage protection diagnosis and solution(P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 57 10.4.9 High temperature protection of compressor top diagnosis and solution(P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ● PCB faulty ●...
  • Page 58 PCB and IPM are separate. Remark： DA1215-H1-I models: Measure the black pin and red pin of the motor connector, the resistance should be around 50Ω at 20℃(68℉) DA1815-H2-I models: Measure the black pin and red pin of the motor connector, the resistance should be around 84.5Ω...
  • Page 59 Main parts check 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 60 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 61 Appendix 2 Temperature Sensor Resistance Value Table for T5 (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37...
  • Page 62 Appendix 3: ℃ 10 11 12 13 14 15 16 17 18 19 20 21 22 ℉ 48 50 52 54 56 58 60 62 64 66 68 70 72 ℃ 23 24 25 26 27 28 29 30 31 32 33 34 35 ℉...
  • Page 63 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value DA108X1C-23EZ DA108X1C-20FZ3 DA130M1C-31FZ DA150S1C-20FZ 0.95Ω Blue - Red 0.71Ω 1.77Ω 1.1Ω (20℃/68℉) (20℃/68℉) (20℃/68℉) Blue - Black (20℃/68℉) Red - Blue...
  • Page 64 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; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 65 5: Pressure On Service Port Cooling chart: ℉(℃) （23.89） （29.44） （35） （40.56） （46.11） 70/59 10.1 75/63 10.7 80/67 11.2 ℉(℃) 75 （23.89） 85 （29.44） 105 （40.56） 115 （46.11） （35） 70/59 75/63 80/67 ℉(℃) 75 （23.89） 85 （29.44） 105 （40.56） 115 （46.11） （35）...
  • Page 66 Heating Chart: ℉ 57/53 47/43 37/33 27/23 17/13 (℃) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 ℉ 57/53 47/43 37/33 27/23 17/13 (℃) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) ℉...

This manual is also suitable for:

Da1815-h2Da2415-h2

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