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9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution (E1)

Yes

Yes

Measure Vs, is it moving alternately
between positive value and negative
value?
(Vs is the voltage between S and N of
outdoor unit.)

Yes

Power off, then turn on the unit 5 seconds
later(reconnect the power wire).Is the error
still displaying after several minutes?

No

Yes

Change the outdoor main PCB.

Power on. Is the error extinguished?

Check all the wirings between indoor and
outdoor, indoor main PCB and outdoor main
PCB following the wiring diagram. Are all
the wirings connected correctly?

Is the wiring to the indoor main
PCB connected correctly?

Change the indoor main PCB.

Yes

Change the outdoor main PCB.

No

Is the wiring to the outdoor m a i n
PCB connected correctly?

Power on. Is the error extinguished?

Change the indoor main PCB.

No

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Содержание KFU-09HRDN1-QRC8GW

Страница 1: ...12F INVERTER SERIES Service Manual 2013 12FSI A 1310...

Страница 2: ...3 Pipe length and the elevation 20 6 4 Installation for the first time 21 6 5 Adding the refrigerant after running the system for many years 24 6 6 Re installation while the indoor unit need to be rep...

Страница 3: ...r the product there is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire of...

Страница 4: ...electric shock Do not touch operation the product with wet hands Do not place a heater or other appliance near the power cable There is risk of fire and electric shock Do not allow water to run into...

Страница 5: ...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 g...

Страница 6: ...ilter securely Clean the filter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage Do not insert hand...

Страница 7: ...8GW KFU 18HRFN1 QRD0GW KOZ 18HFN1 QRD0GW 24k KFU 24HRFN1 QRC8W KOF 24HFN1 QRC8W KFU 24HRDN1 QRC8GW KOF 24HFN1 QRC8GW KFU 24HRFN1 QRD0GW KOF 24HFN1 QRD0GW Killer Of Formaldehyde Silver Ico Filter O Vit...

Страница 8: ...KFU 09HRDN1 QRC8GW 800 188 275 KFU 12HRFN1 QRC8W 800 188 275 KFU 12HRDN1 QRC8GW 800 188 275 KFU 18HRFN1 QRC8W 940 205 275 KFU 18HRFN1 QRC8GW 940 205 275 KFU 18HRFN1 QRD0GW 940 205 275 KFU 24HRFN1 QRC8...

Страница 9: ...C8W 100 95 45 65 KFU 09HRDN1 QRC8GW KFU 12HRDN1 QRC8GW KFU 12HRFN1 QRC8W KFU 18HRFN1 QRC8W 110 100 45 KFU 18HRFN1 QRC8GW KFU 18HRFN1 QRD0GW Model L mm R mm H mm Dimension of installation hole mm KFU 2...

Страница 10: ...9 276 KOB 09HFN1 QRD0GW 780 250 540 843 549 276 KOB 12HFN1 QRC8W 780 250 540 843 549 276 KOB1 12HFN1 QRD0GW 780 250 540 843 549 276 KOC 18HFN1 QRC4W 760 285 590 823 530 290 KOC1 18HFN1 QRC8GW 760 285...

Страница 11: ...IQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER Compressor 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor T3 Condenser temp sens...

Страница 12: ...12 5 Wiring Diagram 5 1 Indoor Unit KFU 09HRDN1 QRC8W KFU 09HRDN1 QRC8GW...

Страница 13: ...13 KFU 12HRFN1 QRC8W KFU 12HRDN1 QRC8GW KFU 18HRFN1 QRC8W KFU 18HRFN1 QRC8GW KFU 18HRFN1 QRD0GW KFU 24HRFN1 QRC8W KFU 24HRFN1 QRD0GW...

Страница 14: ...14 KFU 24HRDN1 QRC8GW...

Страница 15: ...15 5 2 Outdoor Unit KOB 09HFN1 QRC8W KOB 09HFN1 QRD0GW...

Страница 16: ...16 KOB 12HFN1 QRC8W KOC 18HFN1 QRC4W...

Страница 17: ...17 KOB1 12HFN1 QRD0GW KOZ 18HFN1 QRD0GW KOC1 18HFN1 QRC8GW...

Страница 18: ...18 KOF 24HFN1 QRC8W KOF 24HFN1 QRD0GW KOF 24HFN1 QRC8GW...

Страница 19: ...0 663kgf cm 6700 683kgf cm 6 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional are...

Страница 20: ...U 12HRDN1 QRC8GW KOB1 12HFN1 QRD0GW 5 8 20 20 KFU 18HRFN1 QRC8W KOC 18HFN1 QRC4W 12 7 6 35 5 10 25 20 KFU 18HRFN1 QRC8GW KOC1 18HFN1 QRC8GW 5 10 25 20 KFU 18HRFN1 QRD0GW KOZ 18HFN1 QRD0GW 5 10 25 20 K...

Страница 21: ...the indoor unit connections or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum...

Страница 22: ...the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way...

Страница 23: ...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 3 Adding the refrigerant if the pipe length 5m Procedure 1 Connect the charg...

Страница 24: ...e to check for gas leakage 6 5 Adding the refrigerant after running the system for many years Procedure 1 Connect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Con...

Страница 25: ...e the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem c...

Страница 26: ...Air purging by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 wa...

Страница 27: ...t 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 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for...

Страница 28: ...28 5 Disconnect the charge hose from the vacuum pump...

Страница 29: ...valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approx...

Страница 30: ...30 Be sure to check for gas leakage...

Страница 31: ...e above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be less than 80 If the air conditioner operat...

Страница 32: ...amp illuminates when Clean Air feature is activated DEFROST indication lamp For cooling heating models only Lights up when the air conditioner starts defrosting automatically or when the warm air cont...

Страница 33: ...ture If these protections happen the corresponding code will display on indoor unit and the unit will stop working 8 3 6 Indoor fan delayed open function When the unit starts up the louver will be act...

Страница 34: ...fan only mode Operation in heating mode T1 Run supposed T1 26 high fan speed Run supposed T1 26 medium fan speed T2 Refer to table 1 Refer to table 2 T3 Run with compressor frequency F14 3 minutes de...

Страница 35: ...rossing detection error protection only for KFU 09HRDN1 QRC8W KFU 09HRDN1 QRC8GW KFU 12HRDN1 QRC8GW KFU 24HRDN1 QRC8GW If AC detects time interval is not correct for continuous 240s the unit will stop...

Страница 36: ...ompressor stop 2 Temperature setting function is disabled and no setting temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 Auto fan...

Страница 37: ...T4FREMAX6 Fmax T4FREMAX7 Meanwhile the maximum frequency is limited by the indoor fan speed Indoor fan speed Maximum frequency High speed turbo function No limit Silent mode Fixed at F3 If users swit...

Страница 38: ...grade higher until to FREMAX B E Increase the frequency to 2 grade higher until to FREMAX F G Increase the frequency to 1 grade higher until to FREMAX H Keep the current frequency I Decrease the freq...

Страница 39: ...C means different fan speed of outdoor unit 8 4 2 3 Indoor fan running rules In cooling mode indoor fan runs all the time and the speed can be selected as high medium low auto and silent When the comp...

Страница 40: ...sor will keep running at the current frequency T3 52 the compressor will not limit the frequency and resume to the former frequency T3 60 for 5 seconds the compressor will stop until T3 52 8 4 2 5 Eva...

Страница 41: ...its to the following rule Fmax T4FREHEATMAX1 34 T4 Off 33 28 27 25 24 22 21 19 18 16 17 15 14 12 11 6 5 Fmax T4FREHEATMAX2 Fmax T4FREHEATMAX3 Fmax T4FREHEATMAX4 Fmax T4FREHEATMAX5 Fmax T4FREHEATMAX6 F...

Страница 42: ...ll be controlled as below 5 0 4 5 3 5 3 0 2 5 2 0 1 5 T1 Ts T 1 0 I G F E D C B A 0 5 4 0 H J While the zones of A B C are corresponding to different compressor running frequency T 0 as default Note W...

Страница 43: ...0 B E Heating 8 4 3 3 Indoor fan running rules In heating mode indoor fan can be selected as high medium low auto and silent The anti cold wind function is preferential The running rules of anti cold...

Страница 44: ...rature rising the indoor fan will be forced to run 127 seconds with breeze During this period the anti cold wind is disabled Auto fan action in heating mode 1 0 2 0 3 0 4 0 0 0 T1 Ts T L H L 0 4 L H L...

Страница 45: ...0 2 If the compressor cumulate running time is up to 35 minutes and T3 TCDI2 T3 T30SUBT3TWO T30 3 If the compressor cumulate running time is up to 29 minutes and T3 TCDI3 for 3 minutes 4 If the compre...

Страница 46: ...utdoor fan Indoor fan Indoor fan breeze 10s xx 10s no longer than 10m 30s FrequencyF16 10s Frequency F3 xx 60 For KFU 18HRFN1 QRC8W KFU 24HRFN1 QRC8W models Compressor on off on on on off off off 4 wa...

Страница 47: ...ff on on off off 4 way valve Outdoor fan xx no longer than 10m 30s 10s 10s xx 20 For KFU 18HRFN1 QRC8GW KFU 18HRFN1 QRD0GW KFU 24HRFN1 QRD0GW and KFU 24HRDN1 QRC8GW models Compressor on off on on off...

Страница 48: ...ling heating or fan only mode according to T T T1 Ts T T1 Ts Running mode T 1 Cooling 1 T 1 Fan only T 1 Heating Indoor fan will run at auto fan of the relevant mode The louver operates same as in rel...

Страница 49: ...ling mode The compressor runs at F2 frequency and indoor fan runs as breeze After running for 30 minutes the machine will turn to auto mode as 24 setting temperature Forced auto mode The action of for...

Страница 50: ...o restart function which is carried out through an auto restart module In case of a sudden power failure the module memorizes the setting conditions before the power failure The unit will resume the p...

Страница 51: ...51 system In the first 10 seconds after power on this protection is inactive When this protection happens it will last 3 minutes and then the PCB will detect the power supply voltage again...

Страница 52: ...2 sensor 7 times X EC Refrigerant Leakage Detection 2 times O F1 Open circuit or short circuit of outdoor ambient T4 temperature sensor 3 times O F2 Open circuit or short circuit of condenser coil tem...

Страница 53: ...e main PCB directly Otherwise check whether the EEPROM chip plugged in main PCB well Yes No Yes Correct the connection Replace the indoor main PCB Shut off the power supply and turn it on 5 seconds la...

Страница 54: ...e error still displaying after several minutes No Yes Change the outdoor main PCB Power on Is the error extinguished Check all the wirings between indoor and outdoor indoor main PCB and outdoor main P...

Страница 55: ...isplaying the error code Shut off the power supply rotate the fan by hand Does it rotate properly The unit operates normally Find out the cause and have it solved For example check whether the fan is...

Страница 56: ...winding by using the tester If any resistance value is zero the fan motor must have problems and need to be replaced 3 Outdoor or indoor DC Fan Motor control chip is in on PCB For WZDK36 38G W WZDK40...

Страница 57: ...dback signal connector If the value is not 5V change the PCB Otherwise go to step 3 4 Rotate the fan by hand measure the voltage of pin1 5 pin 2 5 and pin 3 5 in feedback signal connector If any volta...

Страница 58: ...of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must has problems and need to be replaced DC motor voltage input and outpu...

Страница 59: ...Check the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor PCB Replace the sensor and c h e c k i f t h e p r o b l...

Страница 60: ...Does the problem remain again No Is there any leakage Especially the connection parts such as the gas valve and the liquid valve No Shut off the power supply and turn it on 5 seconds later Is it still...

Страница 61: ...pply silicon grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated toget...

Страница 62: ...ts normal No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different kinds...

Страница 63: ...urn it on 10 minutes later Check if the unit can start normally No Check if the refrigerant charge volume is normal Recharge the correct refrigerant volume Refrigerant system is blocked such as capill...

Страница 64: ...n grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Chec...

Страница 65: ...TAGE CAUTION Connect discharge resistance approx 100 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 f...

Страница 66: ...T data for T1 T2 T3 and T4 sensor Temperature 5 10 15 20 25 30 40 50 60 Resistance Value K 26 9 20 7 16 1 12 6 10 8 5 2 3 5 2 4 Table 2 Some frequently used R T data for T5 sensor Temperature 5 15 25...

Страница 67: ...67 Compressor DA108X1C 23EZ DA108X1C 23EZ DA130M1C 31FZ DA150S1C 20FZ Indoor fan motor RPG20E WZDK20 38G WZDK30 38G WZDK58 38G Outdoor fan motor WZDK35 38G WZDK35 38G H WZDK35 38G H WZDK50 38G...

Страница 68: ...032900561 Model KFU 18HRFN1 QRD0 GW KFU 24HRFN1 QRD0 GW Compressor DA130M1C 31FZ DA150S1C 20FZ Indoor fan motor WZDK30 38G WZDK58 38G Outdoor fan motor WZDK40 38G W 1 WZDK50 38G Note The motor marked...

Страница 69: ...the resistance between P and UVWN UVW and N Digital tester Normal resistance value Red Black Several M P N U V W Digital tester Normal resistance value Red Black Several M U N V W 4 Indoor AC Fan Mot...

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