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DuctlessAire DA1221-H2-I, Service Manual

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DuctlessAire DA1221-H2-I Service Manual Download Page 37

35 

8.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)

 

 

Error Code

 

E4/E5/F1/F2/F3

 

Malfunction decision 

conditions

 

If the sampling voltage is lower than 0.06V or higher than 4.94V, 

the LED will display the failure.

 

Supposed causes

 

● 

Wiring mistake

 

● 

Sensor faulty

 

● 

PCB faulty

 

Trouble shooting:

 

 

Check the connections 

between temperature 

sensor and main PCB. 

Are the connections 

good? 

 

 

 
 

No 

Correct the connections. 

 

 

Yes 

 

 

 

 

Check the resistance value 
of the sensor. Is it normal? 

 

Replace indoor or 

outdoor main PCB. 

 

 
 

No 

 

 

Replace the sensor. 

Yes 

Summary of Contents for DA1221-H2-I

Page 1: ...DuctlessAire ES Series Service Manual 2016 ABSSA B4 1601 ...

Page 2: ...ation 13 5 4 Installation for the first time 14 5 5 Adding the refrigerant after running the system for many years 15 5 6 Re installation while the indoor unit needs to be repaired 15 5 7 Re installation while the outdoor unit needs to be repaired 16 6 Operation Characteristics 18 7 Electronic function 19 7 1 Abbreviation 19 7 2 Display function 19 7 3 Main Protection 20 7 4 Operation Modes and Fu...

Page 3: ... unit by yourself customer There is risk of fire electric shock explosion or injury Use caution when unpacking and installing the product Sharp edges could cause injury be especially careful of the case edges and the fins on the 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 th...

Page 4: ...ker There is risk of product damage or failure or unintended operation Take care to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage CAUTION Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product Install the drain hose to ensure that water is drained a...

Page 5: ...he water drained from the product Use a firm stool or ladder when cleaning or maintaining the product Be careful and avoid personal injury Replace all the batteries in the remote control with new ones of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of the batteries in a ...

Page 6: ...4 2 Model List Model Names of Indoor Outdoor Units 3D inverter Capacity Indoor units Outdoor units 12K DA1221 H2 I DA1221 H2 O 18k DA1821 H2 I DA1821 H2 O 24K DA2421 H2 I DA2421 H2 O ...

Page 7: ...5 3 Dimension 3 1 Indoor Unit Model W D H DA1221 H2 I 802 189 297 DA1821 H2 I 1080 226 335 DA2421 H2 I 1080 226 335 ...

Page 8: ...6 For DA1221 H2 I For DA1821 H2 I DA2421 H2 I ...

Page 9: ...7 3 2 Outdoor Unit More than 30cm More than 30cm More than 60cm More than 200cm More than 60cm Service space ...

Page 10: ...8 For DA1221 H2 O ...

Page 11: ...9 For DA1821 H2 O ...

Page 12: ...10 For DA2421 H2 O ...

Page 13: ...11 4 Refrigerant Cycle Diagram ...

Page 14: ...6500 663kgf cm 6700 683kgf cm 5 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 mm 3 and 6 0 75 6 and 10 1 10 and 16 1 5 16 and 25 2 5 25 and 32 4 The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which is l...

Page 15: ... A m Additional refrigerant g m Gas Liquid DA1221 H2 I DA1221 H2 O 1 2 Ф12 7 1 4 Ф6 35 7 5 10 25 15 DA1821 H2 I DA1821 H2 O 1 2 Ф12 7 1 4 Ф6 35 7 5 20 30 15 DA2421 H2 I DA2421 H2 O 5 8 Ф15 9 3 8 Ф9 52 7 5 25 50 30 Caution The capacity test is based on the standard length and the maximum permissive length is based on the system reliability ...

Page 16: ...the charge hose of handle hi connection to the vacuum pump 4 Fully open the handle Lo of the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa If the meter does not indicate 0 1Mp after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa after pumping 50 minutes please ...

Page 17: ...t the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 O...

Page 18: ...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 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 5 7 Re installation while the outdoo...

Page 19: ...he specifiedamount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the proper weight disconnect the charge hose from the 3 way valve s service port immediately If the system has bee...

Page 20: ...nit to operate abnormally 2 The room relative humidity should be less than 80 If the air conditioner operates beyond this figure the surface of the air conditioner may attract condensation Please set the vertical air flow louverto itsmaximum angle vertically to the floor and set HIGH fan mode 3 The optimum performance will be achieved during this operating temperature zone ...

Page 21: ...ode Displays the self diagnostic codes Displays for three seconds when Timer ON Fresh Swing Turbo or Silence feature is activated Displays for three seconds when Fresh Swing Turbo or Silence feature is cancelled Displays under defrosting operation Displays when anti cold air feature is activated under heating mode Displays during self clean operation if applicable Displays under 8 heating operatio...

Page 22: ...rking 7 3 6 Indoor fan delayed open function When the unit starts up the louver will be active immediately and the indoor fan will open 7sec later If the unit runs in heating mode the indoor fan will be also controlled by anti cold wind function 7 3 7 Compressor preheating functions Preheating permitting condition When T4 outdoor ambient temperature 3 C the preheating function will be activated 7 ...

Page 23: ... parameter of temperature compensation When the AC runs in mute mode the compressor will run with low frequency When the current is more than setting value the current protection function will be activated and the compressor will stop 7 4 2 2 Outdoor fan running rules The outdoor unit will run at different fan speeds according to T4 For different outdoor units the fan speeds are different 7 4 2 2 ...

Page 24: ...according to T4 For different outdoor units the fan speeds are different 7 4 3 3 Indoor fan running rules When the compressor is on the indoor fan can be set to high med low auto and the anti cold wind function has the priority The indoor fan is controlled as below Auto fan action in heating mode 7 4 3 4 Defrosting mode AC will enter the defrosting mode according to the value of temp of T3 and the...

Page 25: ...w me setting it will quit the forced operation 7 4 7 Timer function 7 4 7 1 Timing range is 24 hours 7 4 7 2 Timer on The machine will turn on automatically when reaching the setting time 7 4 7 3 Timer off The machine will turn off automatically when reaching the setting time 7 4 7 4 Timer on off The machine will turn on automatically when reaching the setting on time and then turn off automatical...

Page 26: ... this function After running in cooling or drying mode once the user presses Self Clean button on remote controller the indoor unit runs in fan only mode for a while then low heat operation and finally runs in fan only again This function can keep the inside of indoor unit dry and prevent breeding of mold 7 4 14 Follow me optional 1 If the indoor PCB receives the signal which results from pressing...

Page 27: ... the code name in 2 seconds the details are as follows Inquiry information Display code Meaning T1 T1 T1 temp T2 T2 T2 temp T3 T3 T3 temp T4 T4 T4 temp T2B Tb T2B temp TP TP TP temp TH TH TH temp Targeted Frequency FT Targeted Frequency Actual Frequency Fr Actual Frequency Indoor fan speed IF Indoor fan speed Outdoor fan speed OF Outdoor fan speed EXV opening angle LA EXV opening angle Compressor ...

Page 28: ...00 101 109 b0 b1 b9 110 111 119 c0 c1 c9 120 121 129 d0 d1 d9 130 131 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Low speed Medium speed High speed Turbo For some big capacity motors 14 FF Actual fan speed Display value turns to decimal value and then multiply 10 The unit is RPM For some small capacity motors display value is from 14 FF hexadecima...

Page 29: ...orget to discharge the electricity power in capacitor 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 Note The picture above is only for reference The plug of your side may be different ...

Page 30: ... has been out of control 1 times P0 IPM malfunction or IGBT over strong current protection 2 times P1 Over voltage or over low voltage protection 3 times P2 High temperature protection of IPM module or compressor top 4 times P3 Outdoor ambient temperature too low 5 times P4 Inverter compressor drive error 6 times P5 Indoor units mode conflict multi zone ONLY 7 times P6 Low pressure protection O li...

Page 31: ...es later Is it still displaying the error code Yes No Correct the connection Yes Replace the indoor outdoor main PCB EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos Indoor PCB Outdoor PCB Note The two photos above are for reference only and may not match your unit exactly If the EEPROM c...

Page 32: ...leshooting Power off then restart the unit 2 minutes later Is the error extinguished No Measure Vs Is the voltage alternating between 25V to 25V Yes Check the outdoor wiring connection Is the wiring correctly Yes Check the indoor wiring connection Is the wiring correct Replace the reactor Is the reactor normal Yes Replace the outdoor main PCB Power on Is the error extinguished Replace the indoorma...

Page 33: ...rk Use a multi meter to test the resistance of the reactor which does not connect with capacitor The normal value should be around zero ohm Otherwise the reactor must have malfunctioned and need to be replaced ...

Page 34: ... off the power supply and turn it on 2 minutes later Is it still displaying the error code The unit operates normally Yes Shut off the power supply rotate the fan by hand Does it rotate properly Yes Find out the cause and have it solved For example check whether the fan is blocked or the bearing is broken Check the wires of fan motor Are all the connections good Correct the connections Yes Check w...

Page 35: ...ck GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Outdoor DC Fan Motor control chip is in outdoor PCB Power on and check if the fan can run normally if the fan can run normally the PCB must has problems and need to be replaced If the fan can t run normally measure the resistance of each two pins If the resistance is not equal to each other the fan motor must have problems and...

Page 36: ...ill turn off Supposed causes T2 sensor faulty Indoor PCB faulty System problems such as leakage or blocking Trouble shooting Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code Yes Is there cool air blowing out from indoor air outlet No Yes Check if T2 sensor is well fixed Correct the installation or replace T2 sensor Does the problem remain again Yes Is ...

Page 37: ...ower than 0 06V or higher than 4 94V the LED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty Trouble shooting Check the connections between temperature sensor and main PCB Are the connections good No Correct the connections Yes Check the resistance value of the sensor Is it normal Replace indoor or outdoor main PCB No Replace the sensor Yes ...

Page 38: ...Wiring mistake Compressor malfunction Trouble shooting Check the power supply Is it normal Is there any blocking Check the compressor resistance values Is it normal Check the connections and wires Is everything well connected Check the reactor Is it normal Stop the unit Check the power supply Clear the blockage Replace the compressor Correct the connections or replace the wires Replace the reactor...

Page 39: ...res and connectors broken Yes Correct the connection or replace the wires and connectors No IPM continuity check Check if the IPM terminal resistance values are uniform Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together Yes Check if the outdoor fan runs properly or the outdoor unit ventilation is good Please refer to the solution of Fan Speed Has Be...

Page 40: ... with power supply and try to restart the unit when power supply gets normal Yes Check if all the connections and wires are good Correct the connections or replace the wires Yes Replace the IPM board if it is separate with main PCB Yes Replace outdoor main PCB Power on and when the unit is in standby check if the voltage between P and N is around DC 310V 340V or 380V For different kinds of units t...

Page 41: ...ly silicon grease Replace the outdoor control PCB No Yes Check if the air flow system of indoor and outdoor units are obstructed Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units Turn off the power supply for 10 minutes Turn back on P2 Is the temperature of compressor top more than 90 C Is the refrigerant system normal Are all the connections good Especially the c...

Page 42: ...ell Correct the connection or replace the wires and connectors Yes Check if the IPM is installed correctly Correct the installation tighten the screws and apply silicon grease Yes IPM continuity check Check if the IPM terminal resistance values are uniform Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together Yes Check if the outdoor fan runs properly ...

Page 43: ... 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 44: ... 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4 3873...

Page 45: ... 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174 0 32 180 9 40 104 29 15 80 176 6 859 120 248 2 117 1 34 171 9 41 106 28 81 178 6 641 121 250 2 061 2 36 163 3 42 108 26 9 82 180 6 43 122 252 2 007 3 37 155 2 43 109 25 86 83 181 6 228 123 253...

Page 46: ...ure the resistance value of each winding by using the tester Position Resistance Value ASN98D22U FZ ASM98D32U FZ ASM135D23 UFZ ATF235D22 UMT Blue Red 1 57Ω 20 C 68 F 2 3Ω 20 C 68 F 1 75Ω 20 C 68 F 0 75Ω 20 68 F Blue Black Red Blue ...

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