Daikin RZQG71L9V1 Service Manual Download Page 123

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ESIE15-13C

Symptom-based Troubleshooting

Service Diagnosis

109

2.7

Equipment Operates but does not Provide Heating

Applicable Model

All models of SkyAir series

Supposed
Causes



Overcharge of refrigerant



Air mixed in refrigerant system



Defective pressure switch



Defective magnetic switch for outdoor unit fan motor



Defective aux. relay for outdoor unit fan motor



Soiled heat exchanger of outdoor unit



There is an interfering item in airflow of outdoor unit.



Defective outdoor unit fan



Soiled air filter of indoor unit



Soiled heat exchanger of indoor unit



There is an interfering item in airflow of indoor unit.



Defective indoor unit fan

Summary of Contents for RZQG71L9V1

Page 1: ...Service Manual GQI Eco Series Heat Pump R 410A 50Hz Smart RZQG71 140L9V1 RZQG71 125L9Y1 RZQG140LY1 Classic RZQSG71L3V1 RZQSG100 140L9V1 RZQSG100 125L8Y1 RZQSG140LY1 ESIE15 13C...

Page 2: ......

Page 3: ...le Models 10 1 2 Names and Functions 10 1 3 MAIN SUB Setting when Using 2 Remote Controllers 14 1 4 Centralized Control Group No Setting 15 2 Wireless Remote Controller 17 2 1 Applicable Models 17 2 2...

Page 4: ...97 2 Symptom based Troubleshooting 99 2 1 Overview 99 2 2 Equipment does not Operate 100 2 3 Indoor Unit Fan Operates but Compressor does not Operate 102 2 4 Cooling Heating Operation Starts but Stops...

Page 5: ...ion 159 4 26 Electronic Thermal Time Lag 161 4 27 Stall Prevention Time Lag 163 4 28 Transmission System Abnormality between Control and Inverter PCB 165 4 29 Open Phase or Power Supply Voltage Imbala...

Page 6: ...ESIE15 13C iv Table of Contents...

Page 7: ...to the customer 1 2 1 Cautions Regarding Safety of Workers Version code Description Date Version A Preliminary release November 2015 Version B Addition of combination FUQ RZQSG February 2016 New contr...

Page 8: ...use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure Warning Caution Do not repair the electrical components...

Page 9: ...ESIE15 13C Introduction vii Use the welder in a well ventilated place Using the welder in an enclosed room may cause oxygen deficiency Caution...

Page 10: ...eat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the te...

Page 11: ...ent children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the conditions o...

Page 12: ...to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Cau...

Page 13: ...L series Heat Pump System Daikin offers a wide range of models to respond to building and office air conditioning needs We are confident that customers will be able to find the models that best suit t...

Page 14: ...Introduction ESIE15 13C xii...

Page 15: ...ESIE15 13C General Information 1 Part 1 General Information 1 Model Names of Indoor Outdoor Units 2 2 Outlook Outdoor Units 4 3 Operating range 5 3 1 Smart 5 3 2 Classic 6 3 3 EDP 7...

Page 16: ...G35FVEB FCQG50FVEB FCQG60FVEB FCQG71FVEB FCQG100FVEB FCQG125FVEB FCQG140FVEB FFQ35B9V1B FFQ50B9V1B FFQ60B9V1B FFQ35C2VEB FFQ50C2VEB FFQ60C2VEB FBQ35D2VEB FBQ50D2VEB FBQ60D2VEB FBQ71D2VEB FBQ100D2VEB F...

Page 17: ...models are used in combination designate the remote controller that is equipped with the most functions as the main unit 3 See the option list for the selection of the refnet kits that are necessary t...

Page 18: ...Outlook Outdoor Units ESIE15 13C 4 General Information 2 Outlook Outdoor Units...

Page 19: ...ndoor de icing frequency it is recommended to install the outdoor unit in a location not exposed to wind 3 If the unit has to operate for 5 days in this operation range with 100 humidity it is advisab...

Page 20: ...freeze up frequency it is recommended to install the outdoor unit in a location not exposed to wind 3 In case of high humidity conditions 92 in this operation area a RZQG model should be used instead...

Page 21: ...uency it is recommended to install the outdoor unit in a location not exposed to wind 3 In case of high humidity conditions 92 in this operation area a RZQG model should be used instead of a RZQSG mod...

Page 22: ...Operating range ESIE15 13C 8 General Information...

Page 23: ...nctions 10 1 3 MAIN SUB Setting when Using 2 Remote Controllers 14 1 4 Centralized Control Group No Setting 15 2 Wireless Remote Controller 17 2 1 Applicable Models 17 2 2 Names and Functions 17 2 3 M...

Page 24: ...fan speed icon 6 AIR CLEANING ICON This icon indicates that the air cleaning unit option is operational 7 LEAVE HOME ICON The leave home icon shows the status of the leave home function 8 EXTERNAL CON...

Page 25: ...N This icon indicates that the defrost hotstart mode is active 24 AIR FILTER CLEANING TIME ICON This icon indicates the air filter must be cleaned Refer to the manual of the indoor unit 25 ELEMENT CLE...

Page 26: ...ting model 3 Menu Enter button Used to indicate the main menu Used to enter the setting item selected 4 Up button Be sure to press the part with the symbol Used to raise the set temperature The next i...

Page 27: ...e leave settings are enabled with this button kept pressed for at least four seconds 8 On Off button Press this button and system will start Press this button again and system will stop 9 Operation la...

Page 28: ...e power off and then on again Step Action 1 Insert a flat head screwdriver into the recess between the upper and lower part of the remote controller as shown in the illustration below Gently pry off t...

Page 29: ...er 1 During normal mode press and hold the button for 4 seconds or more to enter the Field Setting Mode 2 Select the Mode No 00 with the button 3 Select the Group No for each group with the button Gro...

Page 30: ...llation place of the indoor unit into the attached installation table Be sure to keep the installation table with the operation manual for maintenance 1 Basic screen Press and hold Cancel button for 4...

Page 31: ...ls 2 2 Names and Functions Receiver Model Series FCQHG F FCQG F FHQ C Remote Controller BRC7FA532F BRC7G53 8 10 13 11 12 15 14 16 17 9 1 3 4 6 2 5 7 DOWN FAN UP ON OFF H C hr hr TEST MODE TIMER RESERV...

Page 32: ...ress the button and the system will start Press the button again and the system will stop Press this button to select the fan speed Low or Middle or High of your choice Use this button for temperature...

Page 33: ...address for The receiver of the wireless remote controller The wireless remote controller Setting the Address for the Receiver When using both a wired and a wireless remote controller for 1 indoor uni...

Page 34: ...nsor data No with or button 6 Each data displays Refer to the table below display 7 Return to the normal operation mode Press the inspection test operation button once Mode No Function Content and Ope...

Page 35: ...ction adjusting button then press timer ON OFF button to decide In case of Mode 45 Select the changed unit No with or button then press timer ON OFF button to decide 6 Return to the normal operation m...

Page 36: ...longer during backlight lit Select Field setting list Press Menu Enter button In the case of setting per indoor unit during group control When Mode No such as 20 21 22 23 25 are selected highlight the...

Page 37: ...current settings are displayed And SECOND CODE NO means no function Highlight SECOND CODE NO of the FIRST CODE NO to be changed and select desired SECOND CODE NO by using the Up Down button Multiple...

Page 38: ...set And SECOND CODE NO means no function Press Menu Enter button Setting confirmation screen is displayed In the case of group total setting SECOND CODE NO FIRST CODE SW NO Press Menu Enter button Sel...

Page 39: ...pection test button once 1 Inspection mode Press the Inspection test button once 2 Indoor unit model code display Press the Inspection test button once 3 Outdoor unit model code display Press the Insp...

Page 40: ...e of the following items will blink in the basic screen Error Press Menu Button The operation indicator will blink Warning Press Menu Button The operation indicator will not blink Press Menu Enter but...

Page 41: ...ntrol 27 Part 3 Function and Control 1 Function of Main Components and Thermistors 28 2 Operation Flow Chart 30 2 1 Cooling Dry Operation 30 2 2 Heating Operation 31 3 Function Details 32 3 1 Indoor U...

Page 42: ...lowing models RZQG71L RZQSG100L and RZQSG125L This thermistor is near the el compo box R4T R3T R6T R2T R1T R5T R2T R3T R1T Filter Filter Filter C Four way valve Field piping 9 5 C1220T O Field piping...

Page 43: ...ing cooling operation Used for judgement of the defrost IN and OUT condition Intermediate Heat Exchanger Thermistor R5T Used for calculation of high pressure during cooling operation Calculate Pc by d...

Page 44: ...nic expansion valve PI control Low pressure protection control High pressure protection control Discharge pipe temperature protection control Inverter current protection control Low outdoor temperatur...

Page 45: ...ontrol High pressure protection control Heating overload control Suction pipe superheat protection control Discharge pipe temperature protection control Inverter current protection control Overall cur...

Page 46: ...actually detected room temperature 1 the thermostat is turned ON or OFF T Detected room temperature Temperature set by remote controller Tro Room temperature detected when dry operation is started Tr...

Page 47: ...e table below 3 1 5 Drain Pump Control Only for FCQG FCQHG Cooling Dry Operation Normally drain pump ON Thermostat ON OFF Tro 24 C 16 C Tro 24 C Tro 16 C T 2 5 C 1 C Thermostat OFF Dry operation T 2 C...

Page 48: ...e blows air downward Starting condition 5 min 5 sec Drain pump Float switch ON OFF OFF ON 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 6 5 4 3 2 1 0 1 2 3 4 5 6 Thermo ON Thermo OFF Thermo ON Thermo OFF Suction air...

Page 49: ...ature by operating the fan at certain intervals when the fan is turned off while the thermo is off 3 1 10 Defrost Control When the heating operation continues at a low outdoor air temperature the fros...

Page 50: ...r 0 12 MPa or less continues for 5 minutes 6 times in 200 minutes High pressure HPS activated or over 3 92 MPa continues for 1 minute 15 times in 300 minutes Discharge pipe temperature RZQG71L Tempera...

Page 51: ...y is fixed for specified period of time at low frequency to prevent returning of refrigerant Compressor stopping or 6 hours or less after turning ON the power 1 hour or more after turning OFF the comp...

Page 52: ...ure the thermo is turned on and off T Indoor suction air temperature temperature set by remote controller Cooling T Temperature set by remote controller indoor suction air temperature Heating Thermost...

Page 53: ...G71L7V1 RZQG71L7Y1 RZQSG100 125L7V1 RZQSG100 125L7Y1 RZQ100 140L7V1 Y1 RZQSG71L2V1 2YC63SXD 2YC63PXD 2YC63SXD 2YC63PXD 2YC90AXD CXD 2YC63DXD Motor pole 6 poles 4 poles 6 poles 4 poles 6 poles 6 poles...

Page 54: ...ted the indoor fan will be controlled in order to prevent cold air draft and secure the starting performance quick pressure build up Indoor unit fan OFF Heating operation is turned ON with remote cont...

Page 55: ...priority setting when the low noise setting remains the low noise setting is prioritized and even if air conditioning load becomes high the noise operation continues 3 2 11 Low Pressure Protection Con...

Page 56: ...a Compressor operation frequency 1 step 10 sec Compressor operation frequency 1 step 1 min Normal operation Compressor operation frequency B Hz Compressor stop Abnormal stop E3 indication Compressor o...

Page 57: ...he upper limit frequency will be controlled SH Superheat degree EV Electronic expansion valve Normal operation Suction SH 12 C Suction SH 8 C Suction SH 10 C EV opening degree 450 pls Suction SH 10 C...

Page 58: ...0 V At this time operation sound may be heard from the outdoor unit RZQG71L RZQG100 140L A C 105 C 105 C B C 125 C 120 C C minutes 15 minutes 15 minutes Normal operation OR OR OR Td 105 C Compressor u...

Page 59: ...0 140 A 13 7 20 0 B 11 0 14 0 RZQSG71L V 71 100 125 140 A 13 7 13 7 17 6 20 0 B 11 0 11 8 14 6 14 0 Normal operation The condition of Inverter current Stepping down current continues for 2 minutes Inv...

Page 60: ...r operation frequency restriction refer to the followings Hp Lp 0 93MPa Hp Lp 0 78MPa Hp Lp 0 78MPa Compression ratio 1 8 Compression ratio 1 8 Hp 1 86MPa Tfin 66 C OR OR OR Compression ratio 2 4 Hp L...

Page 61: ...onnecting pipe and the transmission connecting line are connected each to a differing outdoor unit the abnormal stop is activated with the error code UF being displayed on the remote controller 3 2 24...

Page 62: ...st operation OR Defrost upper limit time A is met Outdoor unit heat exchanger temperature is within the defrost request area When quick defrost starting is set Factory setting When slow defrost starti...

Page 63: ...asing the number of revolutions of fan is lowered 3 2 27 Emergency Operation No transmission is performed between indoor and outdoor unit During cooling the cycle of operation for 20 minutes and stop...

Page 64: ...nger thermistor in heating Liquid pipe thermistor Indoor suction air thermistor Indoor heat exchanger thermistor B Operation continues even the error is detected The remote controller displays error c...

Page 65: ...tructions 1 When the error code E3 E4 or L8 is displayed on the remote controller there is possibility that either the stop valve is closed or the airflow outlet is obstructed 2 When the error code U2...

Page 66: ...33 when EDP setting is set For WHC See Weather Depending Control 3 2 31 Improved COP in Heating by Tc Control The COP could be increased with reduction of capacity by lowering the TcS Upper Limit valu...

Page 67: ...ority again Example The customer has to make a choice Fix the Te Lower limit and or the Tc upper limit on a certain value OR Choose the weather dependent Te Lower limit or Tc Upper limit In this case...

Page 68: ...ys be combined with the EDP setting 26 2 03 When you make setting 26 7 02 then you will at the same time activate a bigger thermo on off hysteresis Normal hysteresis is DT rs TaIU Tset 0 5 2 C When se...

Page 69: ...ove thermo on Y Temperature difference between indoor and outdoor ambient temperature to start the free cooling It is important to make setting 26 7 02 in case of the use of free cooling This to guara...

Page 70: ...ontrol logic of the Free Cooling DT fc Indoor T Outdoor T DT rs Room T Setpoint T X To increase the free cooling start temperature Y The minimum required DT fc to start the free cooling ON DT fc Y 2 0...

Page 71: ...red Remote Controller 61 2 2 Wireless Remote Controller 66 2 3 Settings Contents and Code No for Indoor Units 67 2 4 Overview of the Field Setting on the Outdoor Units 73 2 5 Quiet Low Noise Operation...

Page 72: ...tings of the remote controller for the BRC1D series should be made in accordance with the following procedure The settings of the remote controller for the BRC1E series should be made in accordance wi...

Page 73: ...y 00 refer to Failure Diagnosis at the Moment of First Installation on page 60 9 If the inspection test operation button is pressed 4 times during a test run the unit returns to normal operation 10 Ch...

Page 74: ...he outdoor unit PCB may have run out If the malfunction code E3 E4 L8 or U0 is displayed on the remote controller there is a possibility that the stop valves are closed If the malfunction code E3 E4 L...

Page 75: ...tton for 4 seconds or more and the Field Set Mode is entered 2 Select the desired Mode No with the button 2 3 During group control when setting by each indoor unit mode No 20 22 and 23 have been selec...

Page 76: ...ng group control When Mode No such as 20 21 22 23 25 are selected highlight the unit No and select Indoor unit No to be set by using Up Down button In the case of group total setting this operation is...

Page 77: ...tdoor unit see installation manual attached to the outdoor unit 6 7 6 Press Menu Enter button Setting confirmation screen is displayed 7 Select Yes and press Menu Enter button Setting details are dete...

Page 78: ...isplay ON 02 Clock is not displayed Available as from software 04 003 1c 0 Available selection in the detail display 01 Room temperature not available 02 Room temperature available You can determine w...

Page 79: ...for heating mode 03 Available for cooling mode 04 Available for heating and cooling mode 4 Weekly timer 01 Weekly timer is not available If the sequence timer is also deactivated under 1e 6 the Timer...

Page 80: ...o Field setting mode UP button DOWN button First code No Second code No MODE button Step Action 1 Hold down the INSPECTION TEST button for at least 4 s during normal mode to enter the Field setting mo...

Page 81: ...which an air conditioner controls when the temperature of a remote controller is A C 11 21 2 Fan OFF at Thermostat OFF Normal OFF 3 Airflow rate setting during heating Standard Slightly up Up 4 Automa...

Page 82: ...r Thermistor Select the thermistor to control room temperature The factory setting for the Second Code No is 02 and room temperature is controlled by the indoor unit suction air thermistor When the Se...

Page 83: ...re thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Room temperature thermistor Suction air thermistor Suction air thermistor Suction air thermist...

Page 84: ...G Only For the purpose of securing airflow range during heating the number of revolutions of fan during heating can be changed Make the setting according to installation environment Mode No First Code...

Page 85: ...be paid for the occurrence of the following situation Setting of Normal Airflow Make the following setting according to the ceiling height The setting position No is set to 01 at the factory FCQG71 F...

Page 86: ...This is set to perform individual operation of heat reclaim ventilation using the remote controller central unit when heat reclaim ventilation is built in Switch only when heat reclaim ventilation is...

Page 87: ...Disabled Factory setting Automatic low noise activation Capacity preceding setting when using KRP58 option Automatic low noise capacity preceding Refer to P74 1 Automatic low noise start and stop time...

Page 88: ...ll be conducted for 10 hours The maximum outdoor temperature is supposed to occur at 14 00h As the time judgement is made in accordance with the outdoor temperature the above mentioned timing is an es...

Page 89: ...ontrol priority for capacity can be set Priority for capacity will be activated by changing field setting 26 0 03 in combination with the closed contact on KRP58M Exceptions The Quiet low noise operat...

Page 90: ...emand 2 Close contact between COM and contact 2 Demand 3 Close contact between COM and contact 3 Demand 1 Power consumption limitation in function of setting on DS1 Demand 2 Power consumption limitati...

Page 91: ...sor frequency is controlled in function of the target evaporating temperature The target evaporating temperature is controlled in function of the cooling load Minimum target Te 2 C Minimum target Te 0...

Page 92: ...mote controller setting temp Te target limited 20 C to protect the comp Te target limited Indoor temp 11 not to rising wetbulb Te see note target acceptable area Indoor temp setting Te target down Ind...

Page 93: ...is selected Field setting 16 26 2 03 Te target C Te target acceptable area Remote controller setting temp Te target limited 20 C to protect the comp Te see note target acceptable area Indoor temp set...

Page 94: ...when using field settings 16 26 2 03 16 26 2 04 Thermostat ON Trs 0 5 C No change from standard setting Thermostat OFF Trs 2 0 C for 5 minutes continuously Trs 4 5 C 2 8 Defrost Start Setting Refer t...

Page 95: ...S1 BS3 BS4 Dip Switch A2P MODE MODE SET RETURN PUMPDOWN TEST HWL L N O P DEMAND Display Lamp BS Button Display Function or Operating Procedure Symbol Name Display Lamp H1P MODE During Setting mode 1 t...

Page 96: ...Demand operating condition normal 30 demand 40 demand 50 demand These conditions above can be checked by performing the following steps Setting mode 1 Monitor mode H1P Blinking Off H1P Setting mode 2...

Page 97: ...display Setting condition LED Display H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P 3 Demand 2 operation bck h h h h bck bck 30 Demand k h h h k h h 40 Demand factory set k h h h h k h 50 De...

Page 98: ...k h k k 23 C factory set k h h h h h k 27 C k h h h h k h 31 C k h h h h k k 35 C k h h h k h h 60 Weather depending control TcS Upper limit value E k k k k k h h 47 C factory set k h h h h h k 48 C k...

Page 99: ...r more and set to Setting mode 2 k h h h h h h Push the SET BS2 button three times to set the LED display as shown in the table on the right k h h h h k k Push the RETURN BS3 button once Present setti...

Page 100: ...ode 1 for 5 seconds or more and set to Setting mode 2 k h h h h h h Press the SET BS2 button 28 times to set the LED display as shown in the table on the right 1 k h k k k h h Press the RETURN BS3 but...

Page 101: ...lfunction 1 cycle before Contents of malfunction 2 cycle before Indication of causes of stepping down operation Normal not in stepping down operation Low pressure stepping down High pressure stepping...

Page 102: ...te heat exchanger thermistor l l k h h l l l l l k k h h h h J8 Abnormal liquid pipe thermistor l l k h l h h h l l k k h h h h L1 PCB failure l l h k h l l l l l k h h h h l l l k k h h h h L4 Elevat...

Page 103: ...error when the self cleaning decoration panel is mounted Check for the connections of the connector X12A on the panel PC board and the connectors X18A and X19A on the sensor PC board AH 05 Dust colle...

Page 104: ...rges caused by thunder L8 05 Inverter limiting current Excessive limiting current is flowing in the inverter This error is supposed to have resulted from failure to open the stop valve excessive charg...

Page 105: ...ect number of indoor units connected This error will be displayed if the locally set number of indoor units is different from the detected number of indoor unit UA 02 Multiple master units detected Th...

Page 106: ...on the unit stops the operation once and restarts three minutes later 4 When there is an error on PCB the emergency operation cannot be used Name Application Setting method Operation Thermistor detect...

Page 107: ...ing the test run mode the test run starts Test Operation by Outdoor Unit PCB 1 Press the Test Operation BS4 button on outdoor unit PCB for 5 seconds After a while the test operation starts Reference F...

Page 108: ...Emergency Operation ESIE15 13C 94 Field Setting...

Page 109: ...nosis by Remote Controller 118 4 2 Error Codes and Description 122 4 3 Safety Devices 123 4 4 Indoor Unit PCB Abnormality 124 4 5 Drain Water Level System Abnormality 125 4 6 Indoor Unit Fan Motor Abn...

Page 110: ...Abnormality 171 4 34 Transmission Error between Indoor and Outdoor Unit 173 4 35 Transmission Error Between Remote Controller and Indoor Unit 176 4 36 Transmission Error between MAIN Remote Controller...

Page 111: ...lease exercise the proper caution High Pressure Low Pressure Discharge Pipe Temperature Suction Temperature Indoor Unit Temperature Differential between Suction Air and Discharge Air Outdoor Unit Temp...

Page 112: ...hort Circuit of Indoor Unit Inlet Outlet Air Lower Lower Lower Outdoor Unit Fin Fouling Higher Higher Higher Short Circuit of Outdoor Unit Inlet Outlet Air Higher Higher Higher Air Mixed in Refrigeran...

Page 113: ...n if remote controller is set to L tap It is normal It is caused by the activation of the overload control airflow shift control 16 Flap automatically moves during cooling It is normal It is caused by...

Page 114: ...oint Defective high pressure switch Defective magnetic switch for fan motor Activation or fault of overcurrent relay for fan motor Defective overcurrent relay for compressor Defective compressor prote...

Page 115: ...tion 3 minutes later 3 min standby YES NO Diagnose based on error code on remote controller YES NO Diagnose based on error code on remote controller YES NO Check the electric system Defective electric...

Page 116: ...perates but Compressor does not Operate Applicable Model All models of SkyAir series Supposed Causes Fuse blown or disorder of contact in operation circuit Defective thermistor Defective indoor outdoo...

Page 117: ...ating operation When suction air thermistor temperature is lower than set temperature Check the thermistor YES NO Caution Be sure to turn off power switch before connect or disconnect connector or par...

Page 118: ...on the error code on remote controller wired YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Wireless NO NO YES YES Defective fan mo...

Page 119: ...reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Defective compressor Compressor protection thermostat Compressor protection thermostat may act due...

Page 120: ...Contact the power company NO YES Replace the power cable NO YES After vacuum drying charge correct amount of refrigerant Then start operation again Defective electronic expansion valve NO YES Defecti...

Page 121: ...ly Excess level of high pressure Insufficient size of power cable Defective compressor Compressor protection thermostat Compressor protection thermostat may act due to the following reasons Internal l...

Page 122: ...oiled heat exchanger Defective fan motor Refer to troubleshooting A6 Check the each item Check the each item Possible causes as follows Refrigerant overcharge Air in refrigerant system Soiled heat exc...

Page 123: ...efrigerant system Defective pressure switch Defective magnetic switch for outdoor unit fan motor Defective aux relay for outdoor unit fan motor Soiled heat exchanger of outdoor unit There is an interf...

Page 124: ...of sunlight Affection of excessive fresh air into room NO Refrigerant shortage possibly generates trouble YES Insufficient compression of compressor Insufficient circulation of refrigerant Faulty ele...

Page 125: ...ve the source of humid condition It may be necessary to remove the source of humid condition YES YES Cleaning of heat exchanger is necessary NO NO YES Did the trouble generate on switching to heating...

Page 126: ...nd is flushing noise of gas refrigerant inside air conditioning unit YES Normal The noise is a sound generated at the time of gas refrigerant flow change or stop YES Normal Operation sound of draining...

Page 127: ...or unit are blown out Cleaning for inside of indoor unit is necessary YES Dust collected inside the indoor unit are blown out Cleaning for inside of indoor unit is necessary Install the air filter Is...

Page 128: ...emote controller is normal Indication appears for short time YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Check the unit based on...

Page 129: ...functions can force the swing flap into a fixed position although swing mode is selected on the remote controller This is not a unit error but a control function to prevent draft to the customer Befo...

Page 130: ...y connected Is the limit switch s transfer connector correctly connected Does the flap swing 220 240 VAC Is continuity no continuity reversed Turn the power supply off once and back on and check wheth...

Page 131: ...on PCB A1P of the outdoor unit k LED on h LED off l LED blinks Note 1 Turn OFF the power supply and turn it ON again after 5 seconds or more Check the error condition and diagnose the problem 2 Turn...

Page 132: ...sed operation to stop Refer to P 122 for error code and error contents Note 1 Pressing the INSPECTION TEST button will blink the check indication 2 While in service mode holding down the ON OFF button...

Page 133: ...Taking corrective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Press Menu button will appear and blink at the...

Page 134: ...ontinue the operation in step 4 until a buzzer remains ON The continuous buzzer indicates that the error code is confirmed Continuous beep No abnormality 3 Press the MODE selector button The left 0 up...

Page 135: ...on is pressed 1 Press INSPECTION TEST button If no button is pressed for 1 minute equipment returns to normal status When MODE selector button is pressed or no button is pressed for 1 minute equipment...

Page 136: ...normality 152 H4 Abnormal low pressure sensor 153 H9 Outdoor air thermistor system abnormality 154 J3 Discharge pipe thermistor system abnormality 154 J5 Suction pipe thermistor system abnormality 154...

Page 137: ...4 3 1 Outdoor Unit 4 3 2 Indoor Unit Model High pressure switch Fuse Open Close RZQG71L 4 0 MPa 0 0 15 3 0 MPa 0 15 6 3A 250V F1U 3 15A 250V F6U RZQG100L 6 3A 250V F1U F2U F3U 5A 250V F6U RZQG125L RZQ...

Page 138: ...n be erased either within the computer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but writing to E2PR...

Page 139: ...oor unit Method of Error Detection By float switch OFF detection Error Decision Conditions The error is generated when the water level reaches its upper limit and when the float switch turns OFF Suppo...

Page 140: ...NO YES YES Connect the float switch NO Replace the float switch YES Replace the indoor unit PCB Replace the drain pump NO NO YES Remove the float switch from X15A short circuit X15A and restart operat...

Page 141: ...act Defective indoor unit PCB Troubleshooting Note Connector and indoor unit PCB Refer to P 191 Model Connector for fan motor PCB FCQG X20A A1P FHQG X20A A1P YES Turn OFF the power supply Wait for 10m...

Page 142: ...talled at the factory is for some reason changed at the installation site the capacity will not be contained in the replacement PCB To set the correct capacity for the PCB you have to connect a capaci...

Page 143: ...ondition of transmission between indoor unit PCB A1P and adaptor PCB using micro computer Error Decision Conditions When normal transmission is not conducted for certain duration 15 seconds or more Af...

Page 144: ...YES Replace the harness YES Eliminate the external factor NO Normal operation Check the panel PCB and indoor unit PCB Turn OFF the power supply and turn the power ON Press the power switch on the rem...

Page 145: ...connector connection Defective thermistor Defective indoor unit PCB Broken or disconnected wire Troubleshooting Refer to P 185 Error Code Defective Thermistor Symbol C4 Heat exchanger thermistor R2T C...

Page 146: ...OFF button of the remote controller must be pushed and held for 5 seconds in the check mode 2 To display the code the Inspection Test Operation button of the remote controller must be pushed and held...

Page 147: ...f floor temperature sensor wiring disconnection in temperature compensation circuit CE 02 Failure of floor temperature sensor wiring disconnection in temperature compensation circuit CE 03 Failure of...

Page 148: ...OFFthepowersupplyonce and then turn it ON again Is the connector X9A on the adapter PC board normally connected Are the connectors of the sensor itself normally connected After checking following the...

Page 149: ...the connectors of the sensor itself normally connected Check for output from the motion sensor Refer to Sensor Address Data No 26 To refer the data select 3 Remote controller operation procedure 3 1...

Page 150: ...E 03 Is the connector X9A on the adapter PC board normally connected Are the connectors of the sensor itself normally connected Check for output from the motion sensor Refer to Sensor Address Data No...

Page 151: ...nected Properly connect the connector Properly connect the connector Are the connectors of the sensor itself normally connected Check for output from the motion sensor Refer to Sensor Address Data No...

Page 152: ...e remote controller thermistor becomes disconnected or shorted when the unit is running Even if the remote controller thermistor is error the system can operate with the system thermistor Supposed Cau...

Page 153: ...ON Supposed Causes Defective outdoor unit PCB A1P Defective fan motor External factor Noise etc Troubleshooting External factor Noise etc YES NO Caution Be sure to turn off power switch before connect...

Page 154: ...ons When the high pressure switch is activated 4 0 MPa When the outdoor unit intermediate thermistor R5T detects the pressure shown below 3 92 MPa or more continuously for one minute Reference equival...

Page 155: ...essure switch Replace the connecting line Replace the outdoor unit intermediate heat exchanger thermistor NO NO YES NO In cooling In heating Is there continuity in the high pressure switch connecting...

Page 156: ...error by the intermediate heat exchanger thermistor R5T Error Decision Conditions When the low pressure switch is activated When the detection pressure is the following value 0 12MPa or less continues...

Page 157: ...PCB A1P Correct the refrigerant system defect Is the stop valve open Is it in cooling operation YES In cooling operation In heating operation Remove the thermistor from the outdoor unit PCB and measu...

Page 158: ...essor lock High differential pressure 2 6 MPa or more starting Stop valve is not opened Troubleshooting Is the stop valve open NO YES Open the stop valve NO YES NO Connect correctly YES Remedy the cau...

Page 159: ...disconnected When the error is generated 4 times the system shuts down Supposed Causes Defective fan motor The harness connector between fan motor and PCB is left in disconnected or faulty connector F...

Page 160: ...an motor connector and then turn the power ON again YES Replace the fan motor NO YES Replace the fuse Error is displayed YES Replace the outdoor unit inverter PCB External factor Noise etc NO A Is the...

Page 161: ...ee and electronic expansion valve opening degree Error Decision Conditions No common power supply when the power is ON When the following conditions are met Suction pipe superheat degree 4 C Minimum e...

Page 162: ...roperly YES YES NO NO YES Mount properly NO Replace the coil of the electronic expansion valve NO YES A Error is displayed again Is the temperature sensor of each thermistor suction pipe discharge pip...

Page 163: ...n Replace the outdoor unit PCB A1P YES A External factor Noise etc NO CHECK 1 Refer to to eliminate the causes of wet operation Error is displayed again CHECK 7 YES YES Replace the pressure sensor NO...

Page 164: ...rge pipe temperature sensor Error Decision Conditions When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly When the discharge pipe t...

Page 165: ...lace the discharge pipe thermistor Replace the outdoor unit PCB A1P NO YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred NO Connect co...

Page 166: ...outdoor unit PCB Disconnected lead wire Troubleshooting Note 1 Connector and indoor unit PCB Model Connector for high pressure switch PCB RZQG X32A A1P Connect correctly Replace the outdoor unit PCB...

Page 167: ...t PC board Refrigerant shortage Stop valve is not opened Defective expansion valve Troubleshooting Note 1 Verify why pressure in the unit is abnormally low 2 LPS resistance closed contact should be 10...

Page 168: ...ctive outdoor unit PCB A1P Troubleshooting Refer to P 185 Error Code Defective Thermistor Symbol H9 Outdoor air thermistor R1T J3 Discharge pipe thermistor R2T J5 Suction pipe thermistor R3T J6 Heat e...

Page 169: ...ng an MP PAM series capacitor overvoltage sensor Error Decision Conditions When over current is detected at the time of waveform output during operating the compressor When the current sensor error du...

Page 170: ...efore connect or disconnect connector or parts damage may be occurred Turn OFF the power supply and remove the connector for fan motor and then operate again Replace the outdoor unit PCB A1P L1 is dis...

Page 171: ...tion fin thermistor Error Decision Conditions When the temperature of the inverter radiation fin rises abnormally due to faulty heat dissipation Supposed Causes Actuation of fin thermal switch Insuffi...

Page 172: ...n off power switch before connect or disconnect connector or parts damage may be occurred Turn the power ON and then press the remote controller check button once NO NO Connect correctly NO YES Troubl...

Page 173: ...transistor Actuated even by instantaneous overcurrent Supposed Causes Defective compressor mechanical lock poor insulation Defective inverter PCB Instantaneous fluctuation of power supply voltage Def...

Page 174: ...mpressor Check the power supply voltage Turn the power ON and then operate the test operation Go to the other troubleshooting Normal operation NO NO YES YES YES Replace the outdoor unit PCB NO Correct...

Page 175: ...ection The error is detected from the current flowing to power transistor into voltage with CT1 DC current sensor Error Decision Conditions When compressor overload except for when startup is detected...

Page 176: ...according to the diagnosis procedure for abnormal noises vibration operating status etc of the compressor NO Remedy the cause Check for excessive refrigerant charging YES YES Caution Be sure to turn...

Page 177: ...is detected by converting the current flowing to power transistor into voltage with CT1 DC current sensor Inverter PCB detects the disorder of position signal Error Decision Conditions When compresso...

Page 178: ...efrigerant system Compressor inspection Inspect according to the diagnosis procedure for abnormal noises vibration operating status etc of the compressor Replace the outdoor unit PCB A1P NO NO Replace...

Page 179: ...ified period of time or longer Supposed Causes Defective outdoor fan motor Defective of fan motor connector contact Defective control and inverter PCB External factor Noise etc Troubleshooting Connect...

Page 180: ...the power supply open phase Supposed Causes Open phase Voltage imbalance between phases Defective outdoor unit PCB Defective main circuit capacitor Power unit Disconnection in diode module Defective...

Page 181: ...n is made only when turning the power supply ON Supposed Causes Improper set value of E2PROM Improper capacity setting adaptor Mismatching of type of PCB Troubleshooting Note Capacity setting adaptor...

Page 182: ...en the electronic expansion valve opens fully and the suction superheat is large more than 20 C continuously for 60 seconds Even if error occurs operation will continue Supposed Causes Stop valve is n...

Page 183: ...gree during the control of suction air superheating high pressure indoor heat exchanger temperature and indoor suction air temperature Error Decision Conditions In cooling When compressor frequency do...

Page 184: ...y be occurred NO YES YES Collect refrigerant and recharge a proper amount of refrigerant after vacuum drying Check the inter unit wiring and piping between the indoor and outdoor units NO Match wiring...

Page 185: ...ge of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions When the voltage of main circuit capacitor built in the inverter and power supply voltage drop or...

Page 186: ...or C C Remove the connector for fan motor on the PCB and operate NO NO YES YES YES YES YES NO Field factors NO Replace the fan motor NO NO YES Replace the fan motor Correct the wiring Replace the outd...

Page 187: ...sion between the indoor and the outdoor unit is not normal over a certain amount of time Error Decision Conditions When the transmission is not carried out normally over a certain amount of time Suppo...

Page 188: ...oor fan motor YES NO Wire correctly and securely fasten the terminal screws NO Is the power supply voltage between 180 and 220 VAC Is connector not connected to the X806A on outdoor unit PCB X804A X80...

Page 189: ...it PCB There is no problem with the unit An external factor noise etc other than unit failure may be the cause YES Make the fuse normal In case of a fuse can be replaced replace the fuse In case of a...

Page 190: ...f indoor unit PCB External factor Noise etc Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor unit PCB...

Page 191: ...of time Supposed Causes Setting failure with remote controller Connection among SUB remote controllers Defective remote controller PCB Disconnection of remote controller wiring Troubleshooting Turn th...

Page 192: ...on indoor unit and outdoor unit Improper field setting Supposed Causes Defective indoor unit PCB and wrong wiring Defective power supply PCB connection Indoor outdoor indoor indoor unit transmission w...

Page 193: ...correct Set correctly NO Connect correctly Do the micro computer normal monitors HAP on all indoor unit PCB blink Are the wires between indoor outdoor correctly connected YES YES NO NO NO Connect cor...

Page 194: ...ects the same address as that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address dup...

Page 195: ...d of Error Detection Micro computer checks if transmission between indoor unit and centralized controller is normal Error Decision Conditions When transmission is not carried out normally for a certai...

Page 196: ...connect connector or parts damage may be occurred YES Is the once connected indoor unit equipment disconnected or the address changed Reset the all remote controllers power supply at the same time YES...

Page 197: ...anger thermistor R2T and the indoor suction air thermistor R1T B Difference in evaporation temperature Te or condensation temperature Tc during heating operation detected by the indoor heat exchanger...

Page 198: ...ying NO YES CHECK 10 Check the refrigerant piping system for clogging CHECK 9 Is the refrigerant level proper Correctly connect inter unit wiring between the indoor and outdoor units YES Caution Be su...

Page 199: ...stors Indoor Outdoor Checking To check the thermistors proceed as follows CHECK 1 FCQG FHQG Thermistor R1T Suction air thermistor R2T Heat exchanger thermistor R3T Intermediate heat exchanger thermist...

Page 200: ...4 87 11 38 08 11 5 37 18 61 4 79 61 5 4 70 12 36 30 12 5 35 45 62 4 62 62 5 4 54 13 34 62 13 5 33 81 63 4 46 63 5 4 38 14 33 02 14 5 32 25 64 4 30 64 5 4 23 15 31 50 15 5 30 77 65 4 16 65 5 4 08 16 3...

Page 201: ...23 5 213 51 73 31 69 73 5 31 15 123 6 87 123 5 6 78 24 208 90 24 5 204 39 74 30 63 74 5 30 12 124 6 69 124 5 6 59 25 200 00 25 5 195 71 75 29 61 75 5 29 12 125 6 51 125 5 6 42 26 191 53 26 5 187 44 76...

Page 202: ...ing length 5 meters or less Visual inspection Does air enter the refrigerant system Conduct refrigerant collection and vacuum drying and then add proper amount refrigerant Is the refrigerant overcharg...

Page 203: ...before and after check valve If YES the check valve is caught Is the indoor unit installed under such conditions that short circuit easily occurs Visual inspection Is the refrigerant gas short Conduct...

Page 204: ...s charged and electric shock may result Therefore disconnect the connector from the outdoor unit fan motor after confirming that the outdoor unit fan has stopped 4 Before measuring the continuity disc...

Page 205: ...h pin then make sure that the resistance is more than the value mentioned in the following table Electronic expansion valve connector and coil resistance criteria Measurement point Judgement 1 4 2 4 A...

Page 206: ...control PCB Faulty fan motor Referring to the Fault Tree Analysis FTA shown below identify the faulty points Refer to Is the heat exchanger clogged Refrigerant dwelling Excessive refrigerant charging...

Page 207: ...termediate heat exchanger thermistor 3 Cooling Adequate level Compressor frequency increases in order to maintain low pressure Compressor frequency decreases in order to maintain high pressure Maximum...

Page 208: ...ation etc Replace the electronic expansion valve 2 Accumulator Frosting Choked moisture Blow a nitrogen gas and then replace the refrigerant 3 Distributor Temperature difference Dust Choked moisture R...

Page 209: ...drops to the level of the lowest frequency 52 Hz and the refrigerant flow rate decrease low pressure cannot be maintained 3 This measured temperature is used to calculate the equivalent saturation pre...

Page 210: ...ured temperature is used to calculate the equivalent saturation pressure of the refrigerant Refer to P 200 Heating 1 High Pressure Pressure sensor 2 Low Pressure Intermediate heat exchanger thermistor...

Page 211: ...ESIE15 13C Appendix 197 Part 6 Appendix 1 Piping Diagrams 198 1 1 RZQG L9V1 198 2 Wiring Diagrams 199 2 1 Outdoor Unit 199 3 Thermodynamic characteristic of R 410A 200 4 Removing the switchbox 201...

Page 212: ...and RZQSG125L This thermistor is near the el compo box R4T R3T R6T R2T R1T R5T R2T R3T R1T Filter Filter Filter C Four way valve Field piping 9 5 C1220T O Field piping 15 9 Accumulator PCB Cooling Di...

Page 213: ...or Outdoor Noiseless earth R7T R8T Motor fan Thermistor Positive Temperature Coefficient 8 See note 8 SEE NOTE 7 Fuse N 220 240V 1N 50Hz L NA L N LA F2U F1U Z1F Z1 C N 2 Z6 C N 1 RED BLU GRN YLW Z4F F...

Page 214: ...ix 3 Thermodynamic characteristic of R 410A Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specific enthalpy kJ kg Liquid Vapor Speci...

Page 215: ...ion of the breaker itself Make sure to establish an earth connection Warning Turn off the power before working on the electrical wiring Fixation screw A Cover Refrigerant pipe Fixation screw B Electri...

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Daikin RZQG71L9V1, Service Manual

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