Repair Guideline for TCL DC Inverter Air Conditioner
Contents
1. 12 12 EA KAE ear Z 2 sn to ts 1 te gt pe gt 20 23 02 24 93 26 97 74 2 921 3 033 3 146 128 0 5818 0 6148 0 649 21 22 04 23 84 25 77 75 2 827 2 933 3 04 129 0 5667 0 5991 0 6328 22 21 1 22 81 2463 76 2 735 2 836 2 938 130 0 5521 0 5839 0 6171 23 2021 21 83 23 55 77 2 647 2 743 2 84 37 Appendix 3 Silk printed label on outdoor power source board Control board connection Connector label Description label Relay label Remarks AC power incoming wire L AC L AC power incoming wire N P2 AC N It is required to reserve 4 inserts at least To indoor communication wire P3 S Ground wire GND Outgoing wire L after filter P4 L Relay control Outgoing wire N after filter P5 N For multiple wires use 5 1 and P5 2 to identify DC input P6 1 DC DC input P7 1 DC DC output P6 2 DC DC output 7 2 DC 4 way valve output 8 VAL K4 Outdoor fan HI output 9 1 H K2 Outdoor fan LOW output P9 2 L K3 Outdoor fan capacitor P9 3 C Compressor output phase U P10 1 U Compressor output phase V P10 2 V Compressor outpu2. Le 10 29 1 78 MENEN 986 10 63 L653 9 mj 20 lt gt 1 3 ug 5418 gt 1 an 18 85 12 t 5 lo J t gt bo Tbe bo gt 3 os oe 55 t gt a 41 wo 74 gt 2 La C vin 5 to 2 2 Ha bo p 16 oe i 2 Jt ant bo rine uw gt 3 all gt pens lt ak ban amp 1 15 EA S 12 4 a 5 5 ZIS fie oo 2 01 bo gt b EN gt En 22 En SA gt he 5 5 97 8 38 8 872 100 1 254 612 8 06 8 526 101 1 245 1 296 7 328 7 754 196 102 1 209 1 r KAI 197 Eae 104 1 j 91 9 NATA 6 118 107 EE
3. 1 Communi cation IPM module Outdoor power source board Storage of working parameters x Communication with power Frequency generation source board Outdoor temperature detection Compressor drive IPM fault output Communication with indoor unit Outdoor fan control 4 way valve control Outdoor power treatment Power ON OFF Communication with IPM Fault and compressor state control DC power indication Switch signal on top of the Outdoor PFC board compressor Chassis heating control AC rectifier Electronic expansion valve control Power factor adjustment Pressure switch signal processing Voltage sampling Protection current sampling 5 Fault Codes including quick solutions and Protection codes Fault Codes If the error code indicated on display PCB is not in the below list the display PCB may be broken Digital Indoor Fault Type Quick solutions LED Function Please try the tips one by one not all at the same time display Indicator flash 5 RUN amp TIMER Indoor outdoor 1 Check the wire connection from indoor to outdoor and among outdoor PCBs Blink RUN 5 8 communication fault 2 Check if the LED indication light on outdoor power source board is on If the sec The most frequent fault light is not on replace outdoor intelligent board when outdoor voltage is 220V and means possible problems
4. compressor wiring for intelligent Firstly correctness power module display P9 When the compressor is restarted immediately Try to start the air conditioner again after stop this might also cause P9 protection after longer period of stop because the cooling system is not stable 13 10 Display EO 5 Symptom Display EO 5 Cause Indoor outdoor communication fault S N Inspections How to Solve Remarks 1 Check if the indoor and outdoor connections are correct The terminal L and N shall correspond to each other on indoor and outdoor units Measure the voltage on outdoor Replace the indoor main PCB terminal L and N before display of EO fault If the voltage is 0 2 If the L amp N voltage is normal measure the voltage between the outdoor terminal N and 1 If the voltage Replace the indoor main PCB Energize change occurs between 0 24V change pulse voltage and 3 If the L amp N voltage is normal measure the voltage observe for between the outdoor terminal N and 1 If the voltage Replace the outdoor power source Sn change occurs between 0 12V change pulse voltage but board 10 there is no 24V Firstly replace the indoor main minutes 4 If the L amp N voltage is normal measure the voltage PCB If the fault remains unsolved l 15 between the outdoor terminal 1 If the voltage has replace the outdoor power source a
5. 20 Display 21 21 Display 8 lt lt 22 22 Display 23 A her eee 24 1 The indoor unit works normally but the outdoor unit does not work 24 2 The outdoor unit is stopped when the air conditioner has run for a period of time 24 3 The air conditioner is tripped when it is started 24 4 The complete unit does not work 24 Appendix 1 26 Appendix 2 35 Appendix Sa 38 Cautions on Replacement of PCB Boards 40 Electronic Control of DC Inverter Air Conditioner 1 Main parts of the electronic control of DC inverter air conditioner The electronic control of DC inverter air conditioner is composed of indoor control system and outdoor control system All the units 9k 12k 18k 24k apply 180 sine wave technology and indoor control system are controlled by outdoor control system For 9k and 12k the outdoor PCB is divided into two parts i e outdoor power source board and Intelligent Power Module IPM Note Power Factor Correction PFC is integrated in IPM IPM board Outdoor power source board For 18k and 24k the outdoor PCB is divided into three parts i e outdoor power source board Power Factor Correction PFC board and Intelligent Power Module IPM IPM board PFC board Out
6. SANYO Repair Guideline for SANYO New Erp DC Inverter Air Conditioner Published in May 2013 KRV 09TDAA KRV 12TDAA KRV 16TDAA KRV 18TDAA KRV 22TDAA KRV 24TDAA Contents I Electronic Control of DC Inverter Air Conditioner 2 1 Main parts of the electronic control of DC inverter air conditioner 2 2 Wiring of DC Inverter Unit ee eeen ereen eneen eneen en vene enen venen eener eneen 3 3 Current PO ws tee nts 3 4 Software Control Function Flow Chart eses enen verven 4 5 Fault Codes including quick solutions and Protection codes 5 Troubleshooting 8 1 According to the fault gt gt 2 2 22 2 1 8 1 Display El or 8 2 Display 9 3 Display E7 EB 9 4 Display 10 5 Display 10 6 Display EP 11 T Display 12 8 Display EU 12 9 Display E9 Firstly display P9 then change to EO 13 10 Display EO ES 14 11 Display 15 12 Display 16 13 Display 16 14 Display 17 15 Display 17 16 Display 18 17 Display 18 18 Display 19 19 Display 6 lt 20
7. replace indoor main PCB when outdoor voltage is not 220V in the indoor outdoor If the light is on and EO is showed on display PCB before compressor running communication from replace the indoor main PCB and then the outdoor PCB boards and then indoor PCB through indoor outdoor connecting wires connecting wires If the light is on and EO is showed on display PCB after compressor running to among outdoor PCBs several minutes replace the indoor outdoor connecting wires then indoor outdoor PCBs EC RUN amp TIMER Outdoor PCB s 1 Check the wire connections among all outdoor PCB boards Blink communication fault 2 Replace intelligent power module board 3 Replace power source board El RUN 1 8 sec Indoor room temperature 1 Check the wire connection of indoor temperature sensor assembly sensor IRT 2 Replace indoor temperature sensor assembly 3 Replace indoor main PCB E2 RUN 2 8 sec Indoor pipe coil 1 Check the wire connection of indoor temperature sensor assembly temperature sensor IPT 2 Replace indoor temperature sensor assembly 3 Replace indoor main PCB E3 RUN 3 8 sec Outdoor pipe coil 1 Check the wire connections of outdoor temperature sensor assembly temperature sensor OPT 2 Replace outdoor temperature sensor assembly 3 Replace outdoor power source board E4 RUN 4 8 sec System abnormal 1 Check if high pressure valve and low pressure valve open 2 Check if refrigerant is in short and then rechar
8. 2 Replace outdoor power source board EU RUN 14 8 sec Voltage sensor fault 1 Check the wire connections between power source board and intelligent power module 2 Replace power source board EH RUN 15 8 sec Outdoor intake temperature sensor 1 Check the wire connections of outdoor temperature sensor assembly 2 Replace outdoor temperature sensor assembly 3 Replace outdoor power source board You are suggested to change the whole outdoor PCB box for 9K 12K in the final user s house Protection Codes You can change the PCB box easily by loosing the 4 screws here It is very easy for after sale service You only have to open the top cover and the big handie Protection codes mean protection from the machine automatically The machine usually can recover by itself otherwise it will change to fault codes Protection codes have little possibility to occur so we do not list the quick solutions as below Digital LED display Indoor function Indicator flash Protection Type Pi RUN Blink TIMER 1 blink 8 sec Overvoltage undervoltage protection P2 RUN Blink TIMER 2 blink 8 sec Overcurrent protection P4 RUN Blink TIMER 4 blink 8 sec Exhaust overtemperature protection P5 RUN Bright TIMER 5 blink 8 sec Subcooling protection under cooling mode P6 RUN Bright TIMER 6 blink 8 sec Overheating protection un
9. 0 9553 50 255 1 016 a ETA 5 45 5 49 97 24 82 59 4 891 5 132 5 381 113 0 sa 6 en ara asma aane 7 1112 45 4 49 71 a 556 4 774 4 997 115 0 8087 0 8595 9117 ii en 5 au ajana CE ER 0 8233 0 3641 NENDE 39 39 EE DE 0 8012 0 8413 5 8192 0 7773 ee 7572 7007 0 7378 7 77189 25 0 6301 0 5647 0 7006 6829 0 6657 gt _ to p bo boa q 4 mle 188 t 4 a 3 94 Q 2 5 zr EE gt on 2 5 1 je s 9 1 gt Janaa gt Als 1 Baal gt J IP D J a len p 09 38 39 j 41 42 8 43 8 45 3 4 EN 49 7 0 50 51 6 52 55 6 56 5
10. know the composition of the circuits position of each part and the possible function 5 It is an extremely unscientific repair method for starting the measurement immediately after getting the circuit board or directly energizing it to start the test This will probably cause secondary damage to the repair board 6 The indoor and outdoor wires must be kept in correct order If not it might cause failure and damage to the electric controller When removing the screws take protective measures to prevent the screws or other objects from falling down onto the circuit board or into the electric control box If any be sure to eliminate them on time 42
11. 0 38 3 082 1 883 80 0 795 0 675 16 297 3808 39 2 974 81 0 773 0658 2 15 565 3 766 2 870 1 800 82 0 751 0 641 2 770 83 0 729 0 625 84 0 709 0610 1 13 586 2 58 1 681 85 0 689 0 595 2 12 991 44 2 4 86 0 669 0580 3 12 426 45 2 4 1 604 87 0 651 0 566 4 11 889 88 0 633 0552 3 452 4 89 0 615 0 538 6 48 2 1 90 0 598 0 525 7 10401 3 359 9 2102 91 052 042 8 9 991 2310 50 2 0 92 0 566 0 499 9 9 57 3262 5 1 96 1 93 0 550 0 487 11 8 795 3165 53 1839 1 325 95 0 521 0 463 12 8 433 1 779 96 0 507 0 452 13 8 089 3067 55 1 721 1 262 97 0 493 0 441 0 430 2968 57 1 201 99 0 467 0419 16 7 148 2918 58 1 561 1 172 100 0 455 0 409 35 Exhaust temperature sensor R amp 5C 2 113 2 3 ae 2 2634 2 745 167 1 i 36 8 56 8 22 651 4 p Ie gt Le 20 89 s s u 21 54 2 654 417051 2 567 2 483 19 7 28 2 L fise 18 08 1 3 2 263 2 32 28 EEE En 195 15 13 16 51 as 205 2 113 21 IP TU eee 21 170 7 192 5 217 1 26 14 18 15 17 87 1 922 1 983 2 045 161 6 1821 34 1272 13 6 114 54 88 1 861 1 922 1 983 e pi Eede eee 145 163 1 1832 36 1172 12 5
12. al during run the conditioner replacing the intelligent 1 protection 15 started power module code and has If the cooling display run for a heating are Firstly period of abnormal check the Insert again if loose display P9 time compressor wiring for correctness When the compressor is restarted immediately after stop this might also cause 9 protection because the cooling system is not stable the conditioner again after a Try starting air longer period of stop 23 2 Other faults 1 The indoor unit works normally but the outdoor unit does not work Cause Analysis a Check if fault code is displayed If yes treat according to fault code If no check according to the following steps b If the outdoor fan runs normally The outdoor fan is started 5 seconds before the compressor is started and it is stopped 15 seconds after the compressor is stopped the client might make wrong judgment on that the outdoor unit does not work because the compressor working frequency is low or the system is in shortage of refrigerant Check the system cooling heating effect and confirm if the system is in shortage of refrigerant Check if the resistance of each temperature sensor is in standard level See appendix for the temperature sensor parameters If not replace the temperature sensor d Check if the indoor outdoor and circuit board wiring Check if the connection is good Pl
13. der cooling mode P7 RUN Bright TIMER 7 blink 8 sec Overheating protection under heating mode P8 RUN Bright TIMER 8 blink 8 sec Outdoor overtemperature undertemperature protection P9 RUN Blink TIMER 9 blink 8 sec Intelligent Power Module protection software control PO RUN Blink TIMER 10 blink 8 sec Intelligent Power Module protection hardware control Display on outdoor power source board The indicator alerts the fault in a cycle as such that it is bright for 0 5 seconds dark for 0 5 seconds blinks n times and then dark for 3 seconds It is not easy to count the blink times so it can only be the assistant to Fault and Protections codes and only useful for professional technicians Blink Blink Fault Message Fault Message times n times n Short circuit open circuit fault of intake temperature 1 IPM protection 18 sensor 2 Overvoltage undervoltage 19 Outdoor EEPROM fault 3 Overcurrent 20 Outdoor fan motor protection 4 Exhaust overtemperature protection 21 Indoor fan motor protection 5 Outdoor coil overtemperature protection 6 Drive fault and protection 23 System in shortage of Freon 7 Communication fault with indoor unit 24 Model configuration wrong Compressor overheat fault compressor top 8 25 Indoor sensor fault switch Short circuit open circuit fault of outdoor 9 26 Indoor coil sensor fault temperature sensor Short circuit open circ
14. dge of outdoor controller is short circuited The short circuiting of rectifier bridge will probably cause tripping error 4 The complete unit does not work Cause Analysis a If fault code is displayed If yes treat according to fault code If no check according to Step 2 24 b Check if the power plug has electricity If no check the power source If yes check if the fuse is good If no replace the fuse If yes check according to Step 3 Check if the resistance of the sensors on indoor and outdoor units is in standard level If not replace the sensor If yes check according to Step 4 d Check if the indoor and outdoor communication is failed The step is same as that for check when the indoor unit works normally but the outdoor unit does not work 25 Appendix 1 CN4 Indoor 1 9k 12k Indoor main PCB Fan motor feedback CN6 temperature P5 Electric Indoor P3 indoor outdoor relay communication wire sensor assembly CN3 Fan Motor CN7 Display PCB Fan Motor capacitor Fuse piezoresis Main chip tance EERPOM Safety wut 090060142 capacitor CNI Transformer CN2 Transformer 26 18k indoor unit PCB CN5 Vane flap motor CN6 Indoor CN7 Safety Jumper temperature Display PCB capacitor EERPOM sensor Emergency on off e i Main on chip Fan moto
15. door power source board 2 Wiring of DC Inverter Unit protector i Indoor fan Motor Room temperature Pipe coil temperature sensor 3 Current Flow REDE EE pa PED control board Indoor unit 4 way Valve 24 BL TL tional lectronic Compressor top protection switc valve Or Optional gt LNE Hat exchanger Y GT Fan moor BL Vane motor for Outdoor coil temperature sensor flap is LOW FAN foysingle speed motor 9 2 indoor unit Port P9 pair port for dual speed motor For 9k 12k PFC is integrated in IPM Live Outdoor Unit Neutral DC PFC board 1 4 Communicati on wie 4 T source ompressor For 9 12 is integrated in IPM 4 Software Control Function Flow Chart Indoor control system Indoor control board Communication with outdoor unit Indoor fan control Vane motor control Temperature sensor Fan speed feedback Electric heater control Selection of cool heat and cool only model Selection of data sheet Selection of Fahrenheit and Centigrade temperature Selection of LED or without LED display Signal input Display PCB board Temperature or fault code display Emergency Switch signal input Remote signal input For 9k 12k PFC is integrated in IPM wire
16. ease tighten the wires 2 The outdoor unit 15 stopped when the air conditioner has run for a period of time Cause Analysis a If any fault is displayed after stop If yes treat according to fault code If not check according to Step b b Check if the supply voltage is normal including the voltage change when the air condition is started If the voltage is unstable or changes too heavily please check the power source If no problem check according to Step c Check if the temperature sensors are normal See appendix for the temperature sensor parameters Check if the resistance is in standard level If not replace the temperature sensor If normal check according to Step d d Check if the indoor outdoor circuit connection and power connection are in good contact If no tighten the connection wires If yes check according to Step Check if the refrigerant is too much or too less If yes add refrigerant 3 The air conditioner is tripped when it is started Cause Analysis a Check if the user s power source plug is correctly connected for example the ground wire might be wrongly connected as the neutral wire b Check if the indoor outdoor circuit and the wiring terminal are correctly connected and if there is short circuiting c Check if the outdoor circuit board wiring terminal and power connection wires are damaged and if there is short circuiting to the metal parts d Check if the rectifier bri
17. ess for replacement of inverter module Special care shall be taken to ensure the coating quality of thermal grease The detailed directive is as follows 1 Before replacing the inverter module make sure to eliminate the old thermal grease and foreign particles with soft clean cloth before you can apply the new thermal grease Always use the thermal grease provided by the customer service department or the same silicone grease as used in the factory Never use any other product of poor quality Operate in strict accordance with the guideline Ensure that the thermal grease silicone grease is applied thin flat and even Use plastic scraper to apply the grease Firstly place a tiny quantity of thermal grease at the center of the place where the grease is to be coated Then use the plastic scraper to apply the grease at the center slightly and evenly onto the entire surface to be treated In consideration of the deviation in the levelness of radiating fin the thickness of thermal grease must be 0 1mm for small area to 0 3mm for large area depending on the size of radiating area Note The function of thermal grease is to fill up the gap and let the surface tightly adhered It is not true the more the better Before placing the greased module flatly onto the radiating fin to tighten the screws firstly hold down with the hands then press and move back and forth slightly until it is in full contact before tightening the screws When
18. function not provided for 9k 12k unit Check the U V and Connect again if incorrect W wires of the If the compressor compressor The pressure is low Add Check the system temperature refrigerant to ensure the system 2 pressure is very high pressure is normal with bad Check if anything Install to the position as required smell blocks the outdoor in the Instruction Manual and ventilation and ensure the air inlet and outlet of radiating the outdoor unit is smooth 3 If compressor temperature is not Replace the outdoor power high source board 11 7 Display EA Symptom Display EA Cause Current sensor fault S N Inspections How to Solve Remarks Find the leakage point and 1 Check if refrigerant leakage 2 recharge the refrigerant Replace the outdoor power 2 If still not solved source board 8 Display EU Symptom Display EU Cause Voltage sensor fault S N Inspections How to Solve Remarks Replace the outdoor power 1 Voltage sensor fault source board 12 9 Display 9 Firstly display P9 then change to 9 Display 9 Firstly display 9 then Symptom change to E9 Cause Intelligent power module fault S N Inspections How to Solve Remarks If this code is displayed when the compressor is started for several seconds or even not started If no inse
19. ge 3 Check if temperature sensor on outdoor condenser loose or broken 4 Replace the indoor main PCB E6 RUN 6 8 sec Indoor fan motor fault 1 Check if indoor cross fan runs normally 2 Check if wires of indoor fan motor connect indoor main PCB well 3 Replace indoor main PCB 4 Replace indoor fan motor 7 RUN 7 8 sec Outdoor temperature 1 Check the wire connections of outdoor temperature sensor assembly sensor 2 Replace outdoor temperature sensor assembly 3 Replace outdoor power source board E8 RUN 8 8 sec Exhaust temperature 1 Check the wire connections of outdoor temperature sensor assembly sensor 2 Replace outdoor temperature sensor assembly 3 Replace outdoor power source board E9 RUN 9 8 sec Intelligent power module of drive and module fault 1 Replace intelligent power module board EF RUN 10 8 sec Outdoor fan motor fault DC Motor 1 Replace the outdoor power source board 2 Replace the outdoor DC fan motor EA RUN 11 8 sec Current sensor fault 1 Find the leakage point and recharge the refrigerant 2 Replace power source board EE RUN 12 8 sec EEPROM fault 1 Check if the EEPROM on indoor main PCB or outdoor power source board installed well 2 Replace indoor main PCB 3 Replace outdoor power source board EP RUN 13 8 sec Temperature switch fault on top of the compressor 1 Check if wires of compressor connect outdoor power source board well
20. in PCB board 21 21 Display 8 Symptom Display P8 Cause Outdoor overtemperature undertemperature protection S N Inspections How to Solve Remarks If the compressor run under cooling mode when the outdoor temperature is lower than 1 C or run under heating mode when the outdoor temperature is higher than 33 the compressor alarms P8 protection Normal protection function If the temperature is not within the protective range above please refer to the Temperature Resistance Sheet See Appendix Measure the resistors on the two ends of outdoor intake temperature sensor 25 C 5KQ For other resistance please refer to the Temperature Resistance Sheet Replace outdoor temperature sensor assembly If the fault remains unsolved Replace outdoor power source board 22 22 Display P9 Symptom Display E9 Firstly display or P9 then change to E9 Cause Intelligent power module fault S N Inspections How to Solve Remarks If this code is displayed when the compressor is started for several If insert wrong seconds or even not started check replace the intelligent the compressor connection for power module correctness Power off P9 appears Replace the intelligent and power alter the Ak power module sure on check air to apply silicone when norm
21. ken board 2 If not solved by above mothod Replace outdoor DC fan motor 13 Display EH Symptom Display EH Cause Outdoor intake temperature sensor fault S N Inspections How to Solve Remarks Check the wire connections of 1 outdoor temperature sensor Fix again assembly Check the outdoor intake temperature sensor 25 5 Replace outdoor temperature 2 For other resistance please refer to sensor assembly the Temperature Resistance Sheet Replace outdoor power source 3 If the fault remains unsolved oand oar 16 14 Display PO Symptom Display PO Cause Intelligent Power Module protection Inspections How to Solve Remarks If this code is displayed when the compressor is started for several seconds If no insert wrong replace the or even not started check the compressor intelligent power module connection for correctness Check if the outdoor intelligent power module is tightly installed ont Power off 1s ug Y Fix the radiator again if loose and then the radiating fins and if the silicone is applied power check the ADE en EE protection Ch ck the system echarge re rigerant if t e pressure code on appears is low Discharge some refrigerant if ressure display when the air the pressure is too high Firstly conditioner Check the outdoor display PO is working ventilation and if there is Install
22. ll to the position as required in the Instruction Manual and ensure the air inlet and outlet of the outdoor unit is smooth 2 Check the system for shortage of refrigerant Add refrigerant 3 Check if the exhaust temperature sensor is not in standard level 25 C 20KQ For other resistances please refer to the Exhaust Temperature Sensor Resistance Sheet Replace outdoor temperature sensor assembly Outdoor power source board damaged Replace the outdoor power source board 18 18 Display P5 Symptom Display P5 Cause Subcooling protection under cooling mode S N Inspections How to Solve Remarks Check if the air inlet and outlet of Install to position as required in 1 bodel By any Manual and ensure air inlet and outlet of the obstruction outdoor unit is smooth 2 Check the system for shortage of Ag ek pana refrigerant Check if the exhaust temperature sensor is not in standard level Measure the resistance of the resistors 3 on two ends of indoor temperature Replace indoor temperature sensor sensor 25C 5KQ For other assembly resistances please refer to the Temperature Resistance Sheet Appendix 1 4 Indoor main PCB board damaged Replace the indoor main PCB 19 19 Display P6 Symptom Display P6 Cause Overheating protection under cooling mode S N In
23. lways change displayed Bo 1 Check if PFC board damaged or 5 If damaged replace PFC board changed Indicator to ES 2 If no damage test the DC voltage on between DC and DC If the voltage Replace the power source board aera outdoor 15 approx 300V period of power 3 If no damage test the DC voltage tume source between DC and DC If the voltage Replace the board board 15 Zero 6 If the problem cannot be solved by using the methods above Firstly replace the intelligent power module If the problem remains unsolved replace the indoor main PCB power source board and PFC board 14 11 Display EE Symptom Display EE Cause EEPROM fault S N Inspections How to Solve Remarks Power off and then power on if the fault remains it is needed to check 1 Fix again if the indoor and outdoor EEPROM installation is loose 2 If the installation is good Replace the indoor main PCB If the fault remains unsolved after outdoor power source 3 replacement of the indoor control board board PREFER 15 Outdoor unit EEPROM 180 4 EA 12 Display EF Symptom Display EF Cause Outdoor fan motor fault DC motor S N Inspections How to Solve Remarks Check if the outdoor power source Replace outdoor power source board is bro
24. ons How to Solve Remarks Check the high pressure and If not open open again to ensure low pressure valves the system circulation is smooth Check refrigerant volume If no Check the leakage point and obvious temperature change after recharge the refrigerant 2 running 5 minutes in cooling mode the system is in shortage of refrigerant Check the indoor evaporator pipe Replace the temperature sensor coil temperature sensor if the resistance is not in 3 25 C 5KQ For other resistance standard level please refer to the Temperature Resistance Sheet 4 If the above inspections are normal Replace the indoor main 5 Display EC Symptom Display EC Cause Outdoor communication fault between power source board and intelligent power module S N Inspections How to Solve Remarks Check the contact of communication wire 1 CN5 between power source board and Insert again if loose intelligent power module Replace intelligent power module If 2 If the above inspections are normal still not solved replace outdoor power source board 10 6 Display EP Symptom Display EP Compressor temperature switch fault on top Cause of the compressor S N Inspections How to Solve Remarks Check the connection of the compressor top temperature switch Insert again if loose wires to CN3 on outdoor power 1 source board Jumper short circuiting This No switch on compressor top
25. or fault S N Inspections How to Solve Remarks If the fan does not run adjust the 1 Check the indoor cross fan blade fan position until it can run smoothly Check the connection of indoor fan 2 motor to CN3 CN4 on indoor main Insert again if loose PCB 3 The above inspections are normal Replace the indoor main PCB 3 Display E3 E7 E8 Symptom Display E3 E7 E8 Cause Outdoor temperature sensor assembly fault S N Inspections How to Solve Remarks Check the connection of outdoor Insert again if loose 1 temperature sensor to CN1 CN2 on outdoor power source board Measure the resistance on the two ends of Replace the temperature sensor outdoor temperature sensor assembly if the resistance is not Resistance of terminal sensor in standard level 25 5 For other resistance please refer to the Temperature Resistance Sheet Resistance of CN2 terminal sensor 25 20 For other resistance please refer to the Temperature Resistance Sheet 3 If the above testing is normal Replace outdoor power source board 4 Display E4 Symptom Display E4 System abnormal Let the compressor run for 5 minutes If the indoor coil temperature cannot Cause be 2 C lower than that before the compressor is started 2 C higher for heating mode it can be judged as the system is abnormal S N Inspecti
26. r capacitor indoor outdo or communicati on wire Fan motor capacitor slot CNI CN2 Transformer Transformer 27 24k indoor main PCB CN6 Indoor CN5 Vane flap temperature Emergency motor sensor on off Fan motor capacitor slot Fan motor capacitor lt CN2 Transformer Transformer capacitor 28 2 9k 12k outdoor power source board and intelligent power source board 7 2 775 18k 24k outdoor power source board intelligent power source board and board 29 9k 12k outdoor power source board Safety P8 4 P9 fan motor Relay EEPROM valve capacitor if B Oe 6 Earth line P3 Co mmuni cation wire with indoor unit CN1 Outdoor Transformer CN3 Compressor top Exhau st temperature protection switch outdoor optional sensor coil temperature tempe rature sensor sensor 30 9k 12k intelligent power module board PFC board integrated 31 18k 24k outdoor power source board P8 4 way Relay P9 Fan valve motor EERPOM Safety capacitor PO Ear gt a A 4 5 are sw ki 4 Induct P7 2 DC output P6 2 DC output Capacitor CN2 Exhaus
27. rt wrong replace the check the compressor connection for intelligent power module correctness Check if the outdoor module is tightly installed Power off onto the radiating fins and Fix the screws again if loose and then if the silicone is applied power on evenly cheek Recharge refrigerant if the pressure 1 protection Check the system z po appears is low Discharge some refrigerant if code on pressure when the air the pressure is too high display conditioner 15 Check the outdoor Firstly working ventilation and if there is Install to the position as required in display PO any obstruction that the Instruction Manual and ensure affects the normal the air inlet and outlet of the outdoor radiating of the air unit is smooth conditioner The above inspections are Replace the intelligent power normal but the fault module remains unsolved If this code is displayed when the compressor is started for several seconds or even not started If no insert wrong replace the check the compressor connection for intelligent power module Power off correctness and then Cooling heating is Replace the intelligent power power on P9 appears after normal during run module check the the air conditioner B e sure to apply 2 protection is started and has If the cooling heating is abnormal check the run for period of Insert again if loose replacing display
28. spections How to Solve Remarks 1 Check if the inlet and outlet of Install to the position as required in outdoor unit is blocked the Instruction Manual and ensure obstructions the inlet and outlet of the outdoor unit is smooth 2 Check the system for shortage of Add refrigerant refrigerant 3 Check if the outdoor evaporator coil Replace the outdoor temperature temperature sensor is drifted short sensor assembly circuited or open circuited 25 5 For other resistance please refer to the Temperature Resistance Sheet 4 Outdoor power source board damaged Replace the outdoor power source board 20 20 Display P7 Symptom Display 7 Cause Overheating protection under heating mode S N Inspections How to Solve Remarks Check if the air inlet and outlet of Install to the position as required in 1 outdoor unit 15 blocked by the Instruction Manual and ensure obstruction the inlet and outlet of the outdoor unit is smooth 2 Check the system for shortage of Ag ek pana refrigerant Check if the exhaust temperature sensor is not in standard level Measure the resistance of the resistors 3 on two ends of indoor temperature Replace the indoor temperature sensor 25C 5KQ For other sensor assembly resistances please refer to the Temperature Resistance Sheet Appendix 1 4 Indoor main PCB damaged Replace the indoor ma
29. t temperature sensor P3 Co mmuni cation CN1 Outdoor wire temperature sensor with outdoor coil temperature indoor unit piezoresistance CN5 Communication P6 1 DC input CN3 Compressor top P7 1 DC input Transformer protection switch optional between power source board and intelligent power module 32 3 18k 24k Power factor correction 33 4 18k 24k Intelligent power module OA MAA 34 Appendix 2 25 5 0 2 Senao Voltage on B25 C 50 C 3470 2 Sesar Voltage on TEMP R Kohm TEMP R Kohm TEMP R Kohm 25 4 524 59 1 512 1143 24 45 985 60 1 464 1 115 23 43 627 4477 19 6 332 2 769 61 1 418 1 088 4452 20 2722 62 1974 1 035 20 37 326 4 399 22 64 1 290 1 009 19 35 458 4371 23 65 1 250 0 984 18 33 695 4343 24 66 1 212 0 960 17 32 030 4313 25 67 L 175 0 936 0 913 15 28 972 4 252 4 630 2 379 69 1 105 0 890 14 27 567 4219 4 457 2332 70 1 072 0 868 13 26 239 416 422 2285 1 040 0847 12 24 984 4152 30 4 133 2 238 72 1 009 0 825 11 28 795 0 805 74 0 950 0 785 a 8 20 598 4008 3 563 2057 76 0 895 0 746 7 1964 3 969 35 59 0 869 0728 2 36 1 969 78 0 843 0 710 4 17 068 285
30. t phase W P10 3 w Module DC input P6B DC Intelligent module Module DC input P7B DC Intelligent module board rectified input Pll DC Power factor Direct insert bridge AC input correction PFC board rectified input P12 DC Power factor Direct insert bridge AC input correction PFC inductance interface P14 L Power factor correction PFC DC output P6C DC Power factor correction PFC DC output P7C DC Power factor correction Outdoor fan DC motor socket CN9 Outdoor temperature sensor CNI Exhaust pipe temperature sensor CN2 Suction pipe temperature sensor CN10 Compressor top thermostat CN3 Switching power output of power CN4 CN4B on Intelligent source board power module and CN4C on Power factor correction Communication signal of power CN5 CN5B on Intelligent source board and module board power module Electronic expansion valve control CN6 CN6B on Intelligent 38 signal power module Electronic expansion valve socket CN7 Communication between power 9 CN9C on Power source board and board factor correction Communication between nodule CN8B Module CN8B on Power board and PFC board board factor correction Base Auxiliary heating CN11 39 Cautions on Replacement of PCB Boards 1 Directive for Replacement of Inverter Module When replacing inverter module the technician must take care on the operating proc
31. ter attaching it fully flat onto the radiator To retighten after loosening it is needed to eliminate the aluminum scraps on the radiator before retightening Insulation paper 2 It is also needed apply the thermal grease evenly when replacing and installing the PFC with radiating substrate 3 Directive for Replacement of Outdoor Power Source Board 1 The outdoor control is mostly the components carrying high current The controller is designed of partial isolation and many circuits are commonly grounded with the high current Take care on human safety 2 As the high current circuit is close to the light current circuit take care the measuring position and safety problems during repair 3 As there is large electrolytic capacitor on the outdoor power source board plentiful residual electrons shall be discharged for a period of time after the power supply is cut off In this 41 case please wait patiently until the capacitor is fully discharged before proceeding to further operation Full discharge may take approx 30 seconds You may also connect a load e g electric iron between DC and DC for manual discharge After thorough discharge use the multimeter 1 to measure The pointer shall point to 0 position and then slowly return to oo If not the electrolytic capacitor is damaged 4 Make sure to have some understanding to the circuit before carrying out repair Most fundamentally the operator must
32. tightening the screws take special care on the strength of radiator materials when using the electric screwdriver torque screwdriver or torque wrench Ensure that the screws are correctly tightened to position The tightening force varies with the module Cautions on installation of screws on inverter module If the tightening force is applied extremely 4 during installation of the module onto the radiator the silicon chip inside the module may be deformed due to the stress And this might cause damage or degrade to the module Therefore be sure to operate according to the required tightening sequence The recommended tightening sequence for the inverter module fixed by two screws is as shown below Pre tightening 1 2 B Final tightening D gt 40 Figure Recommended Tightening Sequence for Screws Other cautions As the module 15 a precious and expensive element never keep the new module close to magnetic object or touch the module with electrostatic object including direct touch with your finger Especially touch with the port of signal terminal is easy to cause module internal breakdown and results in failure to use If possible you may wear electrostatic ring or glove 2 Directive for Replacement of Power factor correction 1 Insulation paper must be attached between power diode rectifier and radiating fins The screw locking torque is 7 0 5kgf cm Do not loosen the insulation paper af
33. to the position as required in any obstruction that the Instruction Manual and ensure affects the normal the air inlet and outlet of the radiating of the air outdoor unit is smooth conditioner The above inspections th telligent are normal but the fault module remains unsolved 15 Display Symptom Display Cause Overvoltage undervoltage protection S N Inspections How to Solve Remarks 1 Test the supply voltage if it is It is normal protection if between 160V 260V exceeding this range Test if the voltage between L and N ae It is normal protection if 2 terminal of outdoor unit is within exceeding this range 160V 260V Replace the outdoor power 3 If the voltage is normal source board 17 16 Display P2 Symptom Display P2 Cause Overcurrent protection S N Inspections How to Solve Remarks Check if the outdoor fan motor is stopped due to overheat protection Replace the damaged capacitor 1 and the damaged outdoor fan or damaged and if the fan capacitor motor is damaged Replace the intelligent power 2 Intelligent power module damaged module 17 Display P4 Symptom Display P4 Cause Exhaust overtemperature protection S N Inspections How to Solve Remarks Check if the air inlet and outlet of outdoor unit is blocked by any obstruction Insta
34. uit fault of outdoor heat 10 27 Indoor EEPROM fault exchanger temperature sensor Short circuit open circuit fault of exhaust 11 28 Indoor fan motor fault temperature sensor 12 Voltage sensor fault 30 drive fault V4 VP2 Outdoor environmental 13 Current sensor fault 31 overtemperature undertemperature protection 14 IPM fault 32 Indoor coil deforst prevention communication fault between power source board 15 33 Indoor coil overheating protection and intelligent power module 16 No feedback from DC fan motor outdoor unit 17 Defrost state Troubleshooting 1 According to the fault code 1 Display E1 or E2 Symptom Display El or E2 Cause Indoor temperature sensor assembly S N Inspections How to Solve Remarks 1 Check the connection of indoor Insert again if loose room temperature sensor assembly to CN6 RT IPT on indoor main PCB 2 Measure the resistance on the two Replace the temperature sensor ends of indoor temperature sensor the resistance is not in 25 C 5KQ For other resistance standard level please refer to the Temperature Resistance Sheet Appendix 1 3 If the above testing is normal Replace the indoor main PCB Check the connection of indoor room temperature sensor assembly to CN6 RT IPT on indoor main PCB Measure the resistance of indoor temperature sensor 2 Display E6 Symptom Display E6 Cause Indoor fan mot
Download Pdf Manuals
Related Search