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Kaisai ICE Series, Service Manual

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Kaisai ICE Series Service Manual Download Page 153

 Troubleshooting 

8.3 IPM Continuity Check

 

WARNING

Electricity remains in capacitors even when the power supply is off.  
Ensure the capacitors are fully discharged before troubleshooting.

1. Turn off outdoor unit and disconnect power supply. 

2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged.

3. Disassemble outdoor PCB or disassemble IPM board.

4. Measure the resistance value between P and U(V, W, N); U(V, W) and N.

Digital tester

Resistance value

Digital tester

Resistance value

(+)Red

(-)Black

∞

(Several M

Ω

)

(+)Red

(-)Black

∞

(Several M

Ω

)

P

N

U

N

U

V

V

W

W

-

Note: The picture and the value are only for reference, actual condition and specific value may vary. 

Summary of Contents for ICE Series

Page 1: ...SPLIT TYPE AIR CONDITIONER Service Manual ICE series...

Page 2: ......

Page 3: ...the Drop Height 3 Electrical Wiring Diagrams Product Features 1 Display Function 2 Safety Features 3 Basic Features Maintenance 1 First Time Installation Check 2 Refrigerant Recharge 3 Re Installatio...

Page 4: ...y 5 Error Diagnosis and Troubleshooting Without Error Code 6 Quick Maintenance by Error Code 7 Troubleshooting by Error Code 8 Check Procedures Appendix i Temperature Sensor Resistance Value Table for...

Page 5: ...Contents 1 Precautions 2 2 Information servicing For flammable materials 3 Safety Precautions...

Page 6: ...d perform electri cal work For more information contact your dealer seller or an authorized service center CAUTION While unpacking be careful of sharp edges around the unit as well as the edges of the...

Page 7: ...work taking place the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks NO SMOKING signs shall be displayed 2 7 Ventilated area Ensure tha...

Page 8: ...on of refrigerant in the atmosphere from a leak 2 12 Cabling Check that cabling will not be subject to wear corrosion excessive pressure vibration sharp edges or any other adverse environmental effect...

Page 9: ...use of reclaimed refrigerant It is essential that electrical power is available before the task is commenced Become familiar with the equipment and its operation Isolate system electrically Before at...

Page 10: ...iated electrical components are sealed to prevent ignition in the event of a refrigerant release Consult manufacturer if in doubt The recovered refrigerant shall be returned to the refrigerant supplie...

Page 11: ...Contents 1 Model Reference 2 2 Pipe Length and Drop Height 3 3 Electrical Wiring Diagrams 4 Specifications...

Page 12: ...ne the specific indoor and outdoor unit model KLW 09HRHI KLWB 09HRHO KLW 12HRHI KLWB 12HRHO KLW 18HRHI KLWB 18HRHO 9k 12k 18k 24k KLW 24HRHI KLWB 24HRHO 220 240V 50Hz 1 Phase Indoor Unit Model Outdoor...

Page 13: ...liquid compression or deterioration of oil return Oil traps in the rising gas pipe can prevent this 1 Indoor unit is installed higher than outdoor unit 2 Outdoor unit is installed higher than indoor u...

Page 14: ...8HRHO 17122000046453 KLWB 24HRHO 17122000048064 16022000034459 16022000034459 16022000020169 16022000003662 3 Electrical Wiring Diagrams Indoor and outdoor unit wiring diagram Indoor Unit Outdoor Unit...

Page 15: ...Generator CAP Capacitor PLASMA Electronic Dust Collector L LIVE N NEUTRAL Outdoor unit abbreviations Abbreviation Paraphrase 4 WAY Gas Valve Assembly 4 WAY VALVE AC FAN Alternating Current FAN DC FAN...

Page 16: ...ol indicates the element is optional the actual shape shall prevail M CN19 INDOOR FAN M 5 3or2 CN12 ION OPTIONAL CN27 3 CN13 Applicable to AC motor only OPTIONAL CAP PIPETEMPERATURESENSOR PLASMA UVC 2...

Page 17: ......

Page 18: ...SWING MOTOR2 MICRO SWITCH PLASMA UVC 2 CN43 CN44 N CN11 CN1 CN16 CN8 CN9 2 2 P_1 BLUE BLACK 16022000003662 ION OPTIONAL HEATER JX1 Y G DISPLAY BOARD CN10A 8 4 CN10 Wire Contoller OPTIONAL Wi Fi Contol...

Page 19: ...Outdoor unit wiring diagram 16022000019533...

Page 20: ......

Page 21: ...Outdoor unit printed circuit board diagram 17122000048121 17122000046453...

Page 22: ...N15 connect to chassis heater 208 230V AC when is ON 5 AC FAN CN25 connect to AC fan 6 PMV CN31 connect to Electric Expansion Valve 7 TESTPORT CN6 used for testing 8 TP T4 T3 CN21 CN22 connect to pipe...

Page 23: ...U VUB P U VP1 VN1 IPM1 L601 R41 2 IC403 E409 E404 D407 C 40 9 C413 CN7 CN 6 CN2 CN8 C N2 9 CN 28 CN2 7 RY1 L6 L5 DAS1 R601 R301 A C O U T I N R Y 3 A C3 C1 R62 5 R6 23 R 622 R 514 R5 13 C6 11 T1 CN 60...

Page 24: ...is ON 6 TP T4 T3 CN17 connect to pipe temp sensor T3 ambient temp sensor T4 exhaust temp sensor TP 7 PMV CN18 connect to Electric Expansion Valve 8 HEAT1 CN16 connect to compressor heater 208 230V AC...

Page 25: ...ode 8 3 8 Forced Operation Function 8 3 9 Timer Function 8 3 10 Sleep Function 9 3 11 Auto Restart Function 9 3 12 Active Clean function 9 3 13 Follow me Optional 9 3 14 8 C Heating Optional 9 3 15 Si...

Page 26: ...it is on timer When TIMER is on WiFi control available on select units only Temperature value Temperature 3s Activation of Timer ON Fresh Swing Turbo or Silent 3s Cancellation of Timer OFF Fresh Swing...

Page 27: ...le has an automatic shutoff mechanism based on the unit s current voltage and temperature If automatic shutoff is initiated the corresponding error code is displayed on the indoor unit and the unit ce...

Page 28: ...unctions 3 1 Table Functions Heating Mode Defrosting Mode Cases Case 1 Case 2 Models KLWB 09HRHO KLWB 12HRHO KLWB 18HRHO KLWB 24HRHO Note The detailed description of case 1 or case 2 is shown in the f...

Page 29: ...m limit frequency FminC Compressor runs at FminC more than 10 minutes T1 is lower than or equal to Tsc CDIFTEMP 0 5 C 32 9 F Note CDIFTEMP is EEPROM setting parameter It is 2 C 35 6 F usually 2 When t...

Page 30: ...Control 1 Reach the configured temperature If the following conditions are satisfied the compressor ceases operation Calculated frequency fb is less than minimum limit frequency FminH Compressor runs...

Page 31: ...l turn on and the symbol is displayed If any one of the following conditions is satisfied defrosting ends and the machine switches to normal heating mode T3 rises above TCDE1 C T3 maintained above TCD...

Page 32: ...e same as they do that in cooling mode Low Room Temperature Protection If the room temperature is lower than 10 C the compressor ceases operations and does not resume until room temperature exceeds 12...

Page 33: ...e power failure the unit stands by 3 12 Active Clean function The Active Clean Technology washes away dust mold and grease that may cause odors when it adheres to the heat exchanger by automatically f...

Page 34: ...rol function Optional Press the Gear button on remote controller to enter the energy efficient mode in a sequence of following Turn off the unit or activate ECO sleep Super cool 8 C Heating Silence or...

Page 35: ...Contents 1 First Time Installation Check 2 2 Refrigerant Recharge 4 3 Re Installation 5 3 1 Indoor Unit 5 3 2 Outdoor Unit 7 Maintenance...

Page 36: ...ure from affecting the air conditioner s performance the indoor unit as well as the pipes between the indoor and outdoor unit must be be leak tested and evacuated Leak test soap water method Use a sof...

Page 37: ...g for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Handle Lo valv...

Page 38: ...in the charge hose then fully tighten the charge hose with push pin Handle Lo to the service port of 3 way valve 6 Place the charging cylinder onto an electronic scale and record the starting weight...

Page 39: ...s gas service port 3 Open the Handle Lo manifold valve to purge air from the charge hose for 5 seconds and then close it quickly 4 Close the 2 way valve 5 Operate the air conditioner in cooling mode C...

Page 40: ...icates 0 1 MPa 14 5 Psi If the meter does not indicate 0 1 MPa 14 5 Psi after 30 minutes continue evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi after 50 min...

Page 41: ...tem for approximately one hour Confirm that the compound meter indicates 0 1 MPa 14 5Psi 4 Close the valve Low side on the charge set and turn off the vacuum pump 5 Wait for 5 minutes then check wheth...

Page 42: ...er to ensure a complete liquid charge 5 Open the valve at the bottom of the cylinder for 5 seconds to purge the air in the charge hose then fully tighten the charge hose with push pin Handle Lo to the...

Page 43: ...Contents 1 Dimension 2 2 Indoor Unit Disassembly 2 1 Front Panel 2 2 Electrical parts 2 3 Evaporator 2 4 Fan motor and fan 1 2 5 Step motor 1 2 6 Drain Hose 1 Indoor Unit Disassembly...

Page 44: ...Indoor Unit Disassembly 2 1 Dimension AG1 Capacity Body Code W mm D mm H mm 6K 11K A 726 210 291 8K 14K B 835 208 295 12K 21K C 969 241 320 18K 28K D 1083 244 336...

Page 45: ...on 1 Hold the front panel by the tabs on the both sides and lift it see CJ_ AG_001 2 Push up the bottom of an air filter step 1 and then pull it out downwards step 2 see CJ_AG_002 CJ_AG_001 CJ_AG_002...

Page 46: ...the hook towards left to open it see CJ_AG_003 4 Bend the horizontal louver lightly by both hands to loosen the hooks then remove the horizontal louver see CJ_AG_003 CJ_AG_003 CJ_AG_004 Note This sect...

Page 47: ...driver and rotate it towars left then remove it see CJ_AG_005 6 Disconnect the connector for display board see CJ_AG_006 7 Slid the front panel side to side to release each axis see CJ_AG_006 CJ_AG_0...

Page 48: ...Procedure Illustration 8 Open the screw cap and then remove the 3 screws see CJ_AG_008 9 Release the hooks with hands see CJ_AG_008 CJ_AG_007 CJ_AG_008 Note This section is for reference only Actual...

Page 49: ...he 5 hooks in the back see CJ_AG_009 11 Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger see CJ_AG_010 CJ_AG_009 CJ_AG_010 Note This s...

Page 50: ...n pull the vertical blades rightward and remove it see CJ_ AG_011 13 Remove 1 screw of the display board see CJ_AG_012 14 Rotate the display board in the direction shown in the right picture see CJ_AG...

Page 51: ...want to repair the electrical control box components perform the first step If you want to repair the main control board assembly perform steps 2 to 5 below 2 Cut the ribbon by a shear then pull out t...

Page 52: ...ain board along the direction indicated in right image see CJ_AG_015 5 Disconnect the connectors and remove main control board see CJ_AG_016 CJ_AG_015 CJ_AG_016 Note This section is for reference only...

Page 53: ...Electrical parts before disassembling evaporator Procedure Illustration 1 Disassemble the pipe holder located at the rear of the unit see CJ_AG_017 2 Remove the 1 screw on the evaporator located at th...

Page 54: ...release the hook on the evaporator see CJ_AG_019 4 Remote the 2 screws on the evaporator located at the fixed plate see CJ_AG_020 5 Pull out the evaporator see CJ_AG_021 CJ_AG_019 CJ_AG_020 CJ_AG_021...

Page 55: ...nel 2 Electrical parts and 3 Evaporator before disassembling fan motor and fan Procedure Illustration 1 Remove the two screws and remove the fixing board of the fan motor see CJ_ AG_022 2 Remove the b...

Page 56: ...mbly 1 Procedure Illustration 3 Remove the fixing screw see CJ_AG_024 4 Pull out the fan motor and fan assembly from the side CJ_AG_024 Note This section is for reference only Actual unit appearance m...

Page 57: ...ion 1 Remove the two screws then remove the horizontal swing motor see CJ_AG_025 2 Remove 1 screw then remove the vertical swing motor see CJ_AG_026 for some units 3 Remove 1 screw then remove the ion...

Page 58: ...Procedure Illustration 1 Rotate the fixed wire clockwise indicated in right image see CJ_AG_027 2 Pull up the drain hose to remove it see CJ_AG_028 CJ_AG_027 CJ_AG_028 Note This section is for refere...

Page 59: ...it Table 2 2 Dimension 3 3 Outdoor Unit Disassembly 16 3 1 Panel Plate 16 3 2 Electrical Parts 29 3 3 Fan Assembly 44 3 4 Fan Motor 45 3 5 Sound blanket 46 3 6 Four way valve 47 3 7 Compressor 48 Outd...

Page 60: ...assembly 2 1 Outdoor Unit Disassembly 1 1 Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board KLWB 09HRHO X201 PCB Board 6 KLWB 12HRHO X201 PCB Board 6 KLWB 18HRHO X301 PCB Board 6 KLWB 24HRHO...

Page 61: ...Outdoor Unit Disassembly 3 2 Dimension 2 1 Panel Plate X130...

Page 62: ...Outdoor Unit Disassembly 4 For US models Rounded grille...

Page 63: ...Outdoor Unit Disassembly 5 2 2 Panel Plate X230...

Page 64: ...Outdoor Unit Disassembly 6 For US models Rounded grille...

Page 65: ...Outdoor Unit Disassembly 7 For US models Square grille...

Page 66: ...Outdoor Unit Disassembly 8 2 3 Panel Plate X330...

Page 67: ...Outdoor Unit Disassembly 9 For US models Rounded grille...

Page 68: ...Outdoor Unit Disassembly 10 For US models Square grille...

Page 69: ...Outdoor Unit Disassembly 11 2 4 Panel Plate X430...

Page 70: ...Outdoor Unit Disassembly 12 For US models Rounded grille...

Page 71: ...Outdoor Unit Disassembly 13 For US models Square grille...

Page 72: ...Outdoor Unit Disassembly 14 2 5 Panel Plate D30...

Page 73: ...Outdoor Unit Disassembly 15 For US models...

Page 74: ...2 Remove the screws of the big handle and then remove the big handle 2 screws see CJ_D30_001 3 Remove the screws of the top cover and then remove the top cover 4 screws Two of the screws is located un...

Page 75: ...t panel and then remove the front right panel 2 screws see CJ_D30_003 5 Remove the screws of the front panel and then remove the front panel 9 screws see CJ_D30_004 CJ_D30_003 CJ_D30_004 Note This sec...

Page 76: ...over and then remove the water collecting cover 2 screw see CJ_ D30_005 7 Remove the screws of the rear net and then remove the rear net 2 screws see CJ_D30_006 for some models CJ_D30_005 CJ_D30_006 N...

Page 77: ...mbly 19 Procedure Illustration 8 Remove the screws of the right panel and then remove the right panel 8 screws see CJ_D30_007 CJ_D30_007 Note This section is for reference only Actual unit appearance...

Page 78: ...the big handle and then remove the big handle 1 screw see CJ_X130_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle...

Page 79: ...water collecting cover 2 screws see CJ_ X130_003 5 Remove the screws of the front panel and then remove the front panel 6 screws onoff models or 8 screws inverter models see CJ_ X130_004 CJ_X130_003 C...

Page 80: ...bly 22 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_X130_005 CJ_X130_005 Note This section is for reference only Actual unit appearance...

Page 81: ...f the big handle and then remove the big handle 1 screws see CJ_X230_001 3 Remove the screws of the top cover and then remove the top cover 4 screws One of the screws is located underneath the big han...

Page 82: ...water collecting cover 2 screws see CJ_ X230_003 5 Remove the screws of the front panel and then remove the front panel 7 screws onoff models or 9 screws inverter models see CJ_ X230_004 CJ_X230_003 C...

Page 83: ...bly 25 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_X230_005 CJ_X230_005 Note This section is for reference only Actual unit appearance...

Page 84: ...the big handle and then remove the big handle 1 screw see CJ_X430_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle...

Page 85: ...water collecting cover 2 screws see CJ_ X430_003 5 Remove the screws of the front panel and then remove the front panel 7 screws onoff models or 9 screws inverter models see CJ_ X430_004 CJ_X430_003 C...

Page 86: ...bly 28 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 6 screws see CJ_X430_005 CJ_X430_005 Note This section is for reference only Actual unit appearance...

Page 87: ...ctor for fan motor from the electronic control board see CJ_ODU_PCB_001 3 4 Remove the connector for the compressor see CJ_ODU_PCB_001 3 5 Pull out the two blue wires connected with the four way valve...

Page 88: ...4 Pull out the two blue wires connected with the four way valve see CJ_ODU_PCB_002 2 5 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor...

Page 89: ...ws and unfix two hooks then remove the electronic control box subassembly see CJ_ ODU_PCB_003 1 Note Electric control box cover cannot be removed so the voltage between P and N cannot be measured CJ_O...

Page 90: ...d then open the electronic control box cover 5 hooks see CJ_ODU_PCB_004 2 3 Disconnect the connector for fan motor from the IPM board see CJ_ ODU_PCB_004 3 4 Remove the connector for the compressor se...

Page 91: ...p sensor TP see CJ_ODU_PCB_004 4 7 Disconnect the electronic expansion valve wire see Fig CJ_ODU_PCB_004 4 8 Remove the connector for 4 way valve see Fig CJ_ODU_PCB_004 4 9 Remove the connector for th...

Page 92: ...ted with the four way valve see CJ_ODU_PCB_005 2 5 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP see CJ_ ODU_PCB_005 2 6 Disconne...

Page 93: ...nd wire 1 screw for some models see CJ_ODU_PCB_006 1 2 Remove the electronic control box subassembly see CJ_ODU_ PCB_006 2 Note Electric control box cover cannot be removed so the voltage between P an...

Page 94: ...7 1 2 Remove 4 screws on the electronic control board and then remove the electronic control box subassembly see CJ_ODU_PCB_007 2 Note Electronic installing box cannot be opened so the voltage between...

Page 95: ...cedure Illustration 3 Remove two screws and then remove the electronic control box subassembly on partition board assembly see CJ_ODU_PCB_007 3 CJ_ODU_PCB_007 3 Note This section is for reference only...

Page 96: ...bly 38 Procedure Illustration 6 Remove two screws and two connectors and then remove the inverter control board see CJ_ODU_ PCB_007 4 CJ_ODU_PCB_007 4 Note This section is for reference only Actual un...

Page 97: ...he ground wire 1 screw see CJ_ODU_ PCB_0011 1 2 Remove the electronic control box subassembly see CJ_ODU_ PCB_008 2 Note Electric control box cover cannot be removed so the voltage between P and N can...

Page 98: ...9 1 2 Remove 6 screws on the electronic control board and then remove the electronic control box subassembly see CJ_ODU_PCB_009 2 Note Electronic installing box cannot be opened so the voltage between...

Page 99: ...llustration 3 Pull out the connector remove one screw and then remove the key board subassembly on terminal board see CJ_ODU_PCB_009 3 for some models CJ_ODU_PCB_009 3 Note This section is for referen...

Page 100: ...of electronic control box 5 screws see CJ_ODU_PCB_010 1 3 Turn over the electronic control box subassembly 4 Disconnect the connectors from the electronic control board see CJ_ODU_PCB_010 2 5 Then rem...

Page 101: ...the ground wire 1 screw see CJ_ODU_ PCB_011 1 2 Remove the electronic control box subassembly see CJ_ODU_ PCB_011 2 Note Electric control box cover cannot be removed so the voltage between P and N can...

Page 102: ...e panel plate refer to 3 1 Panel Plate before disassembling fan Procedure Illustration 1 Remove the nut securing the fan with a spanner see CJ_ODU_ FAN_001 2 Remove the fan CJ_ODU_FAN_001 Note This se...

Page 103: ...or on PCB refer to 3 1 Panel Plate and 3 2 Electrical parts before disassembling fan motor Procedure Illustration 3 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_MOTOR_001 4 Remove the...

Page 104: ...isassembling sound blanket Procedure Illustration 1 Remove the sound blanket side and top see CJ_ODU_BLANKET_001 CJ_ODU_BLANKET_001 Note This section is for reference only Actual unit appearance may v...

Page 105: ...the two steps before heating up the brazed parts The operations above should be implemented by professionals Note Remove the panel plate connection of four way valve on PCB refer to 3 1 Panel plate an...

Page 106: ...eating up the brazed parts The operations above should be implemented by professionals Note Remove the panel plate connection of compressor on PCB refer to 3 1 Panel plate and 3 2 Electrical parts bef...

Page 107: ...om plate see CJ_ODU_COMP_003 4 Heat up the brazed parts and then remove the the discharge pipe and the suction pipe see CJ_ODU_COMP_004 5 Lift the compressor from the base pan assembly with pliers CJ_...

Page 108: ...or Unit Communication Error Diagnosis and Solution TS03 Zero crossing Signal Detection Error Diagnosis and Solution TS04 Fan Speed is Operating Outside of The Normal Range Diagnosis and Solution TS05...

Page 109: ...ution TS12 Inverter Compressor Drive Error Diagnosis and Solution TS26 High pressure protection or Low pressure protection Diagnosis and Solution TS14 Indoor units mode conflic Diagnosis and Solution...

Page 110: ...icity remains in capacitors even when the power supply is off Ensure the capacitors are fully discharged before troubleshooting Test the voltage between P and N on back of the main PCB with multimeter...

Page 111: ...ng outside of the normal range TS04 S IDU 5 times OFF EC 51 Outdoor unit EEPROM parameter error TS01 ODU 5 times OFF EC 52 Condenser coil temperature sensor T3 is in open circuit or has short circuite...

Page 112: ...mes FLASH PC 03 High pressure protection or low pressure protection TS26 INV FH 0P AP mode is active but there is no WIFI kit installed TS34 1 times ON Indoor units mode conflict match with multi outd...

Page 113: ...outlet C F Installation Condition Information Indoor temperature C F Indoor humidity RH Outdoor temperature C F Outdoor humidity RH Length of Connecting pipe Pipe diameter Gas pipe Liquid pipe Length...

Page 114: ...T4 Ambient temperature TP Discharge temperature FT Targeted Frequency Fr Actual Frequency dL Compressor current Uo Outdoor AC voltage Sn Indoor capacity test N A Reserve N A Pr Outdoor fan speed Lr E...

Page 115: ...in 1 minute after power on 2 T2 temperature press On Off for 2s to enter the Internal Fan Control Selector after the pre set temperature is reaches the code displayed is Ch press OK to send the Query...

Page 116: ...the Min Desired Heating Frequency Selector the code displayed is Ch press OK to send the Query Min Desired Heating Frequency Selector code press the Up Down key to select the min desired heating frequ...

Page 117: ...On Off for 2s to enter the Max Cooling Air Speed Settings the code displayed is Ch press OK to send the Query Max Cooling Air Speed code press the Up Down key to select the max cooling air speed then...

Page 118: ...or room temperature sensor T4 is in open circuit or has short circuited EC 54 Compressor discharge temperature sensor TP is in open circuit or has short circuited EC 55 IGBT temperature sensor TH is i...

Page 119: ...mbient temperature protection PH 90 Evaporator coil temperature over high protection PH 91 Evaporator coil temperature over low Protection PC 0A Condenser high temperature protection ph 0c Indoor unit...

Page 120: ...field maintenance No Problem Solution 1 Unit will not start TS15 TS16 2 The power switch is on but fans will not start TS15 TS16 3 The temperature on the display board cannot be set TS15 TS16 4 Unit...

Page 121: ...TS18 5 Condenser Outdoor fan will not start TS17 TS18 6 Unit runs but shortly stops TS17 TS18 7 Compressor short cycles due to overload TS17 TS18 8 High discharge pressure TS17 TS18 9 Low discharge p...

Page 122: ...Troubleshooting 15...

Page 123: ...switch is on but fans will not start The temperature on the display board cannot be set Unit is on but the wind is not cold hot Unit runs but shortly stops The unit starts up and stops frequently Unit...

Page 124: ...art but fans run Compressor and condenser outdoor fan will not start Evaporator indoor fan will not start Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due t...

Page 125: ...Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High suction pressure Low suction pressure Unit...

Page 126: ...T2B Sensor x x x x x x x x x Reactor x x x x x x x x x Compressor x x x x x x x x x Additional refrigerant x x x x x x x x x Part requiring replacement EC 53 EC 52 EC 54 EC 51 EC 07 PC 00 PC 01 PC 02...

Page 127: ...shooting and repair Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code YES Replace the indoor main PCB The unit is operating normally NO Remarks EEPROM A re...

Page 128: ...ower supply and turn it on 2 minutes later Is it still displaying the error code YES Replace the outdoor main PCB The unit is operating normally NO Remarks EEPROM A read only memory whose contents can...

Page 129: ...main PCB such as 4 way valve heater AC fan one by one to check their resistance Is there any component short circuit Unplug electronic expansion valve Check if power LED is on No No Check the AC volta...

Page 130: ...nately between 25V to 25V If the outdoor unit has malfunction the voltage will move alternately with positive value While if the indoor unit has malfunction the voltage will be a certain value Use a m...

Page 131: ...abnormal Recommended parts to prepare Connection wires Indoor main PCB Troubleshooting and repair Check the connections and power supply Correct the connections Turn on the unit when the power supply...

Page 132: ...an motor Indoor main PCB Troubleshooting and repair YES Power off then restart the unit after 2 minutes Is it within normal parameters Replace the fan motor Does a problem remain The unit is operating...

Page 133: ...gnal Voltage 1 Red Vs Vm 192V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V DC motor voltage input and output voltage 115V No Color Signal Voltage 1 Red Vs Vm 140V...

Page 134: ...estart the unit after 2 minutes Is it within normal parameters Replace the fan motor Does a problem remain The unit is operating normally NO Shut off the power supply Rotate the fan by hand YES Does i...

Page 135: ...PCB must has problems and need to be replaced 2 DC Fan Motor control chip is in fan motor single fan Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor co...

Page 136: ...ommended parts to prepare Connection wires Sensors Indoor main PCB Troubleshooting and repair Check the connection between temperature sensor and PCB Replace the indoor main PCB Is it within acceptabl...

Page 137: ...tion between temperature sensor and PCB Replace the outdoor main PCB Is it within acceptable parameters Is it properly wired Ensure proper connections NO Measure the resistance value of the sensor YES...

Page 138: ...nal refrigerant Troubleshooting and repair Power off then restart the unit 15 minutes later Are any leakages present Put your hands in front of the indoor air outlet Is there cool or heat air blowing...

Page 139: ...to prepare Communication wire Indoor PCB Display board Troubleshooting and repair Is it still displaying the error code The unit functions normally Check the wirings and connections Are all the connec...

Page 140: ...ing No Are the reactor and inductance functioning normally Are the reactor and inductance functioning normally Yes Replace reactor Replace reactor No Is the outdoor ambient temperature is higher than...

Page 141: ...the outdoor PCB NO Check the outdoor fan and the outdoor unit ventilation Check the outdoor fan and the outdoor unit ventilation YES Is it in working order Is it in working order Please refer to the...

Page 142: ...n working order Ensure proper connections or replace the wires NO Power on and measure the voltage between P and N YES While the unit is in standby is the voltage between P and N is around DC 310V 340...

Page 143: ...tor System blockages Troubleshooting and repair 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 un...

Page 144: ...M radiator Are they fixed tightly Replace the outdoor control PCB Tighten the screws and apply silicon grease NO YES Note For certain models outdoor PCB could not be removed separately In this case th...

Page 145: ...s the problem resolved Replace outdoor main board Is the problem resolved No High pressure protection High pressure protection Is the outdoor fan running properly Is the outdoor fan running properly N...

Page 146: ...M board or replace the outdoor PCB NO Check the outdoor fan and the outdoor unit ventilation Check the outdoor fan and the outdoor unit ventilation YES Is it in working order Is it in working order Pl...

Page 147: ...sure switch cut off the system because high pressure is higher than 4 4 MPa or outdoor pressure switch cut off the system because low pressure is lower than 0 13 MPa the LED displays the failure code...

Page 148: ...er dirty Is the heat exchanger dirty No Yes Replace outdoor main board Is the problem resolved Replace outdoor main board Is the problem resolved No High pressure protection High pressure protection I...

Page 149: ...ed Is the indoor fan running properly in cooling mode Is the indoor fan running properly in cooling mode No Yes Yes No Check whether the refrigerant system is functioning properly Check whether the re...

Page 150: ...s No No Off No No No No Note No No mode conflict Yes Mode conflict TS34 AP mode is active but there is no WIFI kit installed Description AP mode is active but cannot detect WIFI kit Recommended parts...

Page 151: ...Unit Disassembly 2 Measure the resistance value of the sensor using a multi meter 3 Check corresponding temperature sensor resistance value table Refer to Chapter 8 Appendix Note The picture and the...

Page 152: ...23UFZ KSN140D21UFZ KSN140D21UFZB KTM140D78UFZ3 KTF235D22UMT KSK75D33UEZD3 KSK89D33UEZD3 KTM240D57UMT Blue Red 1 72 1 28 1 5 0 75 2 14 0 62 Blue Black Red Black Resistance Value KSN140D58UFZ KTM240D43U...

Page 153: ...ply 2 Discharge electrolytic capacitors and ensure all energy storage unit has been discharged 3 Disassemble outdoor PCB or disassemble IPM board 4 Measure the resistance value between P and U V W N U...

Page 154: ...ing Welling Welling Welling Black Red Main 444 287 231 183 6 White Black AUX 470 409 414 206 Model YKFG 45 4 13 YKFG 45 4 22 YKFG 45 4 22 13 YKFG 60 4 2 6 YKFG 60 4 1 Brand Dongfang Welling Welling We...

Page 155: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 2 ii Temperature Sensor Resistance Value Table for TP for some units C K 3 iii Pressure On Service Port 4 Appendix...

Page 156: ...1 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...

Page 157: ...35 78 75 167 8 084 115 239 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 10...

Page 158: ...10 3 9 5 10 0 10 6 12 4 13 0 PSI 70 59 21 11 15 93 94 106 116 119 113 117 125 147 154 75 63 23 89 17 22 97 99 115 125 124 120 126 132 155 162 80 67 26 67 19 44 103 104 123 138 135 129 132 140 162 173...

Page 159: ...20 8 18 5 16 5 65 18 33 32 5 30 0 26 6 25 4 23 3 20 5 19 0 75 23 89 33 8 31 5 27 8 26 3 24 9 21 5 20 0 PSI 55 12 78 439 413 367 330 302 268 239 65 18 33 471 435 386 368 339 297 276 75 23 89 489 457 40...

Page 160: ...6 3 6 6 7 8 8 1 PSI 70 59 21 11 15 58 59 67 73 74 71 74 78 91 96 75 63 23 89 17 22 61 62 71 78 78 75 78 83 97 102 80 67 26 67 19 44 64 65 77 86 84 81 83 87 102 107 90 73 32 22 22 78 70 71 87 96 93 86...

Page 161: ...3 13 0 11 6 10 3 65 18 33 20 3 18 8 16 6 15 9 14 6 12 8 11 9 75 23 89 21 1 19 7 17 3 16 4 15 6 13 4 12 5 PSI 55 12 78 274 258 229 207 189 168 149 65 18 33 294 273 241 231 212 186 172 6 75 23 89 306 28...

Page 162: ...12 6 13 3 PSI 70 59 21 11 15 95 96 108 118 121 115 119 128 150 157 75 63 23 89 17 22 99 101 117 128 126 122 129 135 158 165 80 67 26 67 19 44 105 106 125 141 138 132 135 143 165 176 90 73 32 22 22 78...

Page 163: ...1 2 18 9 16 8 65 18 33 33 2 30 6 27 1 25 9 23 8 20 9 19 4 75 23 89 34 5 32 1 28 4 26 8 25 4 21 9 20 4 PSI 55 12 78 448 421 374 337 308 273 244 65 18 33 480 444 394 375 346 303 282 75 23 89 499 466 411...

Page 164: ...656 2200 22 319 55 512 131 922 750 7 5 108 75 13 249 55 848 2250 22 5 326 25 56 527 133 749 800 8 116 15 465 59 837 2300 23 333 5 57 526 135 547 850 8 5 123 25 17 58 63 644 2350 23 5 340 75 58 508 13...

Page 165: ...11 159 5 10 471 50 848 3350 33 5 485 75 53 935 129 083 1150 11 5 166 75 11 988 53 578 3400 34 493 54 593 130 267 1200 12 174 13 457 56 223 3450 34 5 500 25 55 243 131 437 1250 12 5 181 25 14 879 58 7...

Page 166: ...1 850 8 5 123 25 1 393 34 507 2600 26 377 41 977 107 559 900 9 130 5 3 209 37 777 2650 26 5 384 25 42 769 108 984 950 9 5 137 75 4 951 40 911 2700 27 391 5 43 55 110 39 1000 10 145 6 624 43 923 2750 2...

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