Fujitsu AO G36KBTB Series Service Instruction Download Page 3

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CONTENTS

1. CONTROL AND FUNCTIONS

1. Compressor frequency control..................................................................01-1

2. Auto changeover operation......................................................................01-11
3. Fan control.................................................................................................01-13

3-1. Indoor fan control..........................................................................................................01-13
3-2. Outdoor fan control.......................................................................................................01-19

4. Louver control ...........................................................................................01-21

4-1. Individual louver control (For Compact cassette type) ..................................................01-21
4-2. All louver control (For Compact cassette type) .............................................................01-21
4-3. Swing operation (For Compact cassette type)..............................................................01-22

5. Timer operation control ............................................................................01-23

5-1. Wireless remote control................................................................................................01-23
5-2. Wired remote control ....................................................................................................01-25

6. Defrost operation control .........................................................................01-28

6-1. Defrost operation in heating operation stopped ............................................................01-29

7. Various control..........................................................................................01-30

8. Various protections...................................................................................01-35

Summary of Contents for AO G36KBTB Series

Page 1: ...pe Models Indoor unit Outdoor unit AUXG18KVLA AUXG22KVLA AUXG24KVLA ARXG18KLLAP ARXG22KMLA ARXG24KMLA RCG18KVLA RCG22KVLA RCG24KVLA RCG18KVLA RDG18KLLAP RDG18KLLAP RDG22KMLA RDG24KMLA AO G36KBTB AO G45KBTB AO G54KBTB ROG36KBTB ROG45KBTB ROG54KBTB SERVICE INSTRUCTION ...

Page 2: ...1 CONTROL AND FUNCTIONS 2021 03 12 SR_CH04_SM002EG_02 ...

Page 3: ...ol 01 28 6 1 Defrost operation in heating operation stopped 01 29 7 Various control 01 30 7 1 Auto restart 01 30 7 2 10 C HEAT operation 01 30 7 3 ECONOMY operation 01 30 7 4 Fresh air control 01 30 7 5 Compressor preheating 01 31 7 6 External electrical heater control 01 31 7 7 Electronic expansion valve control 01 31 7 8 Drain pump control 01 32 7 9 Prevention to restart for 3 minutes 3 minutes ...

Page 4: ...8 8 Low outdoor temperature protection 01 38 8 9 High temperature and high pressure release control 01 38 CONTENTS continued ...

Page 5: ......

Page 6: ...r than a set temperature the compressor will be stopped When the room temperature is within the range of 6 0 C to 1 0 C of the setting temperature the compressor frequency is controlled within the range shown in the table below However the maxi mum frequency is limited in the range shown in the figure below based on the indoor fan mode and the outdoor temperature Compact cassette type Compressor f...

Page 7: ...0 34 26 AUXG22KVLA AUXG24KVLA A zone 98 64 49 32 B zone 98 64 49 32 C zone 77 49 40 32 D zone 54 40 34 26 E zone 54 40 34 26 F zone 54 40 34 26 Models AOHG45KBTB and AOHG54KBTB Model name Outdoor temperature zone Indoor unit fan mode HIGH MED LOW QUIET AUXG18KVLA A zone 95 66 51 33 B zone 95 66 51 33 C zone 80 51 41 33 D zone 51 41 35 27 E zone 51 41 35 27 F zone 51 41 35 27 AUXG22KVLA AUXG24KVLA ...

Page 8: ...es Unit rps Model AOHG36KBTB Model name Outdoor temperature zone Indoor unit fan mode HIGH MED LOW QUIET ARXG18KLLAP A zone 98 64 49 32 B zone 98 64 49 32 C zone 77 49 40 32 D zone 49 40 34 26 E zone 49 40 34 26 F zone 49 40 34 26 Models AOHG45KBTB and AOHG54KBTB Model name Outdoor temperature zone Indoor unit fan mode HIGH MED LOW QUIET ARXG18KLLAP A zone 95 66 51 33 B zone 95 66 51 33 C zone 80 ...

Page 9: ...s Unit rps Model AOHG36KBTB Model name Outdoor temperature zone Indoor unit fan mode HIGH MED LOW QUIET ARXG22KMLA ARXG24KMLA A zone 98 64 49 32 B zone 98 64 49 32 C zone 77 49 40 32 D zone 54 40 34 26 E zone 54 40 34 26 F zone 54 40 34 26 Models AOHG45KBTB and AOHG54KBTB Model name Outdoor temperature zone Indoor unit fan mode HIGH MED LOW QUIET ARXG22KMLA ARXG24KMLA A zone 95 66 51 33 B zone 95 ...

Page 10: ...ain to maximum performance If the room temperature is 1 0 C higher than a set temperature the compressor will be stopped When the room temperature is within the range of 1 0 C to 6 0 C of the setting temperature the compressor frequency is controlled within the range shown below Compressor frequency range Connected model name Minimum frequency Maximum frequency AOHG36KBTB 15 rps 120 rps AOHG45KBTB...

Page 11: ... room temperature Compressor frequency range Unit rps Connected model name Outdoor temperature zone Operating frequency AOHG36KBTB X zone 32 J zone 32 Y zone 0 AOHG45KBTB AOHG54KBTB X zone 33 J zone 33 Y zone 0 Compressor control based on room temperature Ts 0 5 C Ts 1 5 C Ts 0 5 C Ts 1 5 C X zone J zone Y zone Room temperature drops Room temperature rises Ts Set temperature 1 3 Dry operation 01 6...

Page 12: ... Special operation Frequency rps I II III IV V VI VII VIII 25 42 53 61 65 75 85 92 Time sec 1 2 3 4 5 6 7 8 225 305 605 665 725 785 855 1 000 NOTES Normal operation Cooling and dry mode Below 3 hours from the compressor stop and the compressor thermistor 15 C After defrost operation Other than when the compressor starts for the first time since the breaker turns on Special operation Other than the...

Page 13: ...600 660 Special operation Frequency rps I II III IV V VI VII VIII IX X 41 46 51 57 60 72 81 91 100 110 Time sec 1 2 3 4 5 6 7 8 9 10 120 185 245 305 605 665 725 785 845 1 000 NOTES Normal operation Cooling and dry mode Below 3 hours from the compressor stop and the compressor thermistor 15 C After defrost operation Other than when the compressor starts for the first time since the breaker turns on...

Page 14: ...Limitation of compressor frequency AOHG36KBTB A zone 55 rps B zone 52 rps C zone 47 rps D zone 39 rps E zone 33 rps F zone 25 rps G zone 18 rps H zone 20 rps I zone 20 rps J zone 21 rps K zone 24 rps AOHG45KBTB AOHG54KBTB A zone 50 rps B zone 47 rps C zone 40 rps D zone 30 rps E zone 22 rps F zone 20 rps G zone 16 rps H zone 16 rps I zone 17 rps J zone 23 rps K zone 28 rps 1 5 Compressor frequency...

Page 15: ...8 rps B zone 52 rps C zone 43 rps D zone 38 rps E zone 28 rps F zone 23 rps G zone 20 rps H zone 17 rps I zone 17 rps AOHG45KBTB AOHG54KBTB A zone 46 rps B zone 42 rps C zone 35 rps D zone 32 rps E zone 23 rps F zone 20 rps G zone 17 rps H zone 13 rps I zone 16 rps 1 5 Compressor frequency limitation by outdoor temperature 01 10 1 Compressor frequency control CONTROL AND FUNCTIONS CONTROL AND FUNC...

Page 16: ...le zone indoor unit operation mode is selected as below Same operation mode is selected as outdoor unit If outdoor unit is operating in cooling and heating mode indoor unit will be operated by the same operation mode Selected by outdoor temperature If outdoor unit is operating in other than cooling and heating mode indoor unit will be op erated according to the outdoor temperature as below Outdoor...

Page 17: ...tion Middle zone Operation mode of outdoor unit Cooling Outdoor temp 25 C Operation mode before the monitor mode is cooling mode Monitor mode Room temp Ts 2 C No Yes No Yes No Yes No Yes No No Operation mode of outdoor unit Heating Yes Yes No System stops or operation command other than auto changeover operation Yes No Yes No Thermostat remains in off state for 6 minutes or longer Yes No 01 12 2 A...

Page 18: ...0 1 Fan mode only 2 Cooling mode only Fan operation Airflow can be switched in 5 steps such as AUTO QUIET LOW MED HIGH while indoor unit fan only runs When fan mode is set at AUTO it operates on MED fan speed Cooling operation Switch the airflow AUTO and indoor fan motor will run according to room temperature as below On the other hand if switched in HIGH QUIET indoor motor will run at a constant ...

Page 19: ...revention control heating mode The maximum value of the indoor fan speed is set as shown below based on the detected tempera ture by the indoor heat exchanger sensor on heating mode Normal operation 42 C Indoor heat exchanger temperature rises Setting fan mode Cool air prevention S LOW Indoor heat exchanger temperature drops 39 C 37 C 30 C 37 C 34 C 32 C 24 C MED or setting fan mode LOW or setting...

Page 20: ... 24 C POWERFUL LOW or setting fan mode LOW or setting fan mode LOW or setting fan mode 10 C HEAT operation Indoor heat exchanger temperature rises Indoor heat exchanger temperature drops 39 C 34 C AUTO LOW Moisture return prevention control cooling and dry mode Switch the airflow AUTO at cooling mode and the indoor fan motor will run as shown below Compressor On Off Indoor fan setting airflow S LO...

Page 21: ...indoor unit fan only runs When fan mode is set at AUTO it operates on MED fan speed Cooling operation Switch the airflow AUTO and indoor fan motor will run according to room temperature as below On the other hand if switched in HIGH QUIET indoor motor will run at a constant airflow of COOL operation modes QUIET LOW MED HIGH as shown in Fan speed above Airflow change over Cooling Auto When room tem...

Page 22: ...value of the indoor fan speed is set as shown below based on the detected tempera ture by the indoor heat exchanger sensor on heating mode Normal operation Indoor heat exchanger temperature rises S LOW Indoor heat exchanger temperature drops 37 C 29 C 32 C 24 C Setting fan mode LOW or setting fan mode Lower speed is selected 13 minutes later Indoor heat exchanger temperature rises Indoor heat exch...

Page 23: ...airflow AUTO at cooling mode and the indoor fan motor will run as shown below Compressor On Off Indoor fan setting airflow S LOW Off 10 30 60 180 60 180 60 10 30 sec Indoor fan speed 3 1 Indoor fan control 01 18 3 Fan control CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS ...

Page 24: ... 690 7 570 620 6 570 590 5 570 480 4 540 410 3 480 340 2 400 270 1 270 200 S HIGH 830 When the compressor frequency increases the outdoor fan speed also changes to the higher speed When the compressor frequency decreases the outdoor fan speed also changes to the lower speed NOTE After defrost control on the heating mode the fan speed is kept higher regardless of the compressor frequency Fan speed ...

Page 25: ...90 1 200 200 S HIGH 990 When the compressor frequency increases the outdoor fan speed also changes to the higher speed When the compressor frequency decreases the outdoor fan speed also changes to the lower speed NOTE After defrost control on the heating mode the fan speed is kept higher regardless of the compressor frequency Fan speed after defrost control 990 rpm 3 2 Outdoor fan control 01 20 3 ...

Page 26: ... only available by 2 wire remote controller NOTE When the 2 wire remote controller is disconnected clear the individual setting Otherwise this setting can t change 4 2 All louver control For Compact cassette type All louver operation When the mode is selected the standard louver position of the each mode is set Operation mode Standard Position Cooling 1 Dry 1 Heating 4 Monitor 1 NOTES Setting of t...

Page 27: ...flow direction louver starts to swing Swinging range Cooling mode dry mode fan mode 1 4 Heating mode 1 4 When the indoor fan is S LOW or stop mode the swing operation is interrupted and it stops at either upper end or bottom end 4 3 Swing operation For Compact cassette type 01 22 4 Louver control CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS ...

Page 28: ...mer The program timer allows the off timer and the on timer to be used in combination one time Operation mode Stop mode Stop mode Stop mode Operation mode Operation mode Set time Set time Set time Set time Operation will start from the timer setting either off timer and on timer whichever is closest to the clock current timer setting The order of operations is indicated by the allow in the remote ...

Page 29: ...r After that the setting temperature is not changed and the operation is stopped at the setting time Set temperature rises Ts Set temperature Stop of operation Ts 2 C Set 60 min 1 C In the heating operation mode When the sleep timer is set the setting temperature is decreased 1 C It decreases the setting temperature another 1 C every 30 minutes Upon lowering 4 C the setting temperature is not chan...

Page 30: ...imer The program timer allows the off timer and the on timer to be used in combination one time Operation mode Stop mode Stop mode Stop mode Operation mode Operation mode Set time Set time Set time Set time Operation will start from the timer setting either off timer and on timer whichever is closest to the clock current timer setting The order of operations is indicated by the allow in the remote...

Page 31: ...Stop of operation Ts 2 C Set 60 min 1 C In the heating operation mode When the sleep timer is set the setting temperature is decreased 1 C It decreases the setting temperature another 1 C every 30 minutes Upon lowering 4 C the setting temperature is not changed and the operation is stopped at the setting time Set Ts 2 C 1 C 3 C 4 C Ts Set temperature 30 min 30 min 30 min Stop of operation Set temp...

Page 32: ...ner will operate at a minimum of 18 C even if the SET BACK temperature is set to 17 C or lower Case of SET BACK timer on the Cooling operation Setting temperature 22 C SET BACK temperature 26 C SET BACK setting Operation temperature Operation temperature 26 C 22 C 26 C 22 C 24 C 1 ON OFF OFF ON 1 During the SET BACK function the setting temperature is changed Chenge the setting temperature 22 C 24...

Page 33: ...0 5 deg Tn 10 C Tn Tnb 2 deg Tn 10 C Tn 25 C Ta 20 C Tn Ta 7 C or Tn 25 C Ta 20 C Integrating defrost Constant monitoring Compressor integrating operation time More than 240 min For long continuous operation More than 215 min For long continuous operation Less than 10 min For intermittent operation Condition Tn 3 C Tn 5 C Count of the compressor off 40 times If the compressor continuous operation ...

Page 34: ...nditions are satisfied in heating operation Compressor operation integrating time 30 minutes or more Compressor continuous operation time 10 minutes or more Outdoor unit heat exchanger temperature 4 C or less Release condition The defrost operation is released when either one of the conditions below is satisfied Outdoor unit heat exchanger temperature after 1 minute or later since compressor start...

Page 35: ...peration 7 2 10 C HEAT operation 10 C HEAT operation performs as below setting when pressing 10 C HEAT button Operation mode Heating Setting temperature 10 C Fan mode AUTO LED display Economy Defrost operation Operate as normal 7 3 ECONOMY operation The ECONOMY operation starts by pressing ECONOMY button on the remote controller The ECONOMY operation is almost the same operation as below settings ...

Page 36: ...r Off Ts 10 C Ts 1 C Ts 3 C Ts 12 C NOTES When the compressor stop external electric heater is off It operates only in heating mode and when the indoor fan operates However S LOW is exclud ed 7 7 Electronic expansion valve control The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the table below Operation mode Puls...

Page 37: ... hour after the compressor stops When the float switch is on the compressor indoor and outdoor fan motor operation are stopped The sub unit sends the signal to the main unit simultaneously When the float switch is turned off the sub unit sends the signal to the main unit Drain pump operates continuously for 3 minutes after the float switch is turned off and then drain pump is turned off When the f...

Page 38: ...s Retry number 30 Retry set number 3 When the compressor fails to start in the retry set number above the compressor is stopped 7 10 4 way valve control If heating mode is selected at the compressor start 4 way valve is energized for heating When the air conditioner is switched between cooling and heating mode compressor is stopped and the 4 way valve is switched when the 3 minutes passes and the ...

Page 39: ...utdoor unit operates by lowest current of them Capacity priority mode Operation condition The function setting is set to 1 Capacity check condition Shortage Compressor frequency limited compressor frequency for low noise mode Enough Compressor frequency limited compressor frequency for low noise mode Operation When detecting the shortage capacity or enough capacity condition continuous 30 minutes ...

Page 40: ... 104 C Compressor frequency 14 rps 120 seconds Release condition 101 C Compressor protection temperature 110 C 8 2 Anti freezing control cooling and dry mode The compressor frequency is decrease in cooling and dry mode when the indoor unit heat exchang er temperature sensor detects the temperature lower than the trigger condition When the indoor unit heat exchanger temperature reaches release cond...

Page 41: ...a 2 C 24 0 A 23 5 A Heating 2 C Ta 20 0 A 19 5 A Ta 2 C 24 0 A 23 5 A 8 4 Low pressure protection control cooling mode After the compressor start up and 10 minutes has passed When the pressure sensor detected value is 0 68MPaG or less continues for 1minute the com pressor frequency 8rps After the frequency of the compressor 8rps and 1 minute has passed When the pressure sensor detected value is 0 ...

Page 42: ... the 90 seconds from the fan operation detect less than 200 rpm for 10 seconds IPM trip protection works Current overload protection works When detecting the above condtion recheck the condition after 6 minutes When count the twice the protection works Protection contents Reduce the static pressure 20 Pa When it does not dissolve even the minimum static pressure condition work the following operat...

Page 43: ...igh temperature and high pressure release control The compressor is controlled as follows Models AOHG36KBTB AOHG45KBTB and AOHG54KBTB Heating mode Indoor unit heat exchanger pressure rises Indoor unit heat exchanger pressure drops Stable zone AB BC CD DE Zone A Zone B Zone C Zone D Zone E AB 4 1 MPaG BC 3 5 MPaG CD 3 3 MPaG DE 3 0 MPaG Zone Operation Zone A Compressor is stopped Zone B The compres...

Page 44: ...2 TROUBLE SHOOTING AIR CONDITIONER 1 phase type Simultaneous operation multi type ...

Page 45: ...Middle Thermistor Error Compressor rotor position detection Error Outdoor Unit Fan Motor Error 4 way Valve Error Discharge Temp Error PFC circuit Error 1 If an error occurs an error icon appears on the Monitor mode screen Touch the Status on the Monitor mode screen The Status screen is displayed 2 Touch the Error Information on the Status screen The Error Information screen is displayed If there a...

Page 46: ...al Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 264V AC240V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Serial Signal Reverse Transfer Signal Check Serial Signal Reverse Transfer Signal Check if Indicated value swings between AC90V and AC270V at Outdoor Unit Terminal 1 3 If it is abnormal Check Outdoor unit fan motor PA...

Page 47: ...there is loose connector open cable or mis wiring If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 264V AC240V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Serial Signal Forward Transfer Signal Check Serial Signal Forwar...

Page 48: ...r PCB Terminal 1 3 Terminal 1 2 Power supply for the Remote Control AU type If it is DC12V Remote Control is failure Controller PCB is normal Replace Remote Control If it is DC 0V Controller PCB is failure Check Remote Control once again Replace Controller PCB Check Voltage at CN300 of Controller PCB Terminal 1 3 Terminal 1 2 Power supply for the Remote Control AR type If it is DC13V Remote Contro...

Page 49: ...controller PCB If there is loose connector open cable or mis wiring After receiving a signal from the external I O PCB the same a signal has not been received for 15sec 1 Connection failure 2 External I O PCB failure 3 Controller PCB failure Check Point 1 Check the connection Check Point 2 Replace external I O PCB If Check Point 1 do not improve the symptom change External I O PCB OK OK Check Poin...

Page 50: ...ination error Indoor unit 1 The selection of indoor units is incorrect Check Point 1 Check the type of indoor unit Check the type of the connected indoor unit If abnormal condition is found correct it Check Point 2 Replace Main PCB If Check Point 1 do not improve the symptom replace Main PCB of Outdoor unit Indicate or Display Error code 23 02 07 Outdoor unit n n times blinking Light ON Light OFF ...

Page 51: ...ng wire connection in RCgroup Please refer to the installation manual Change controller PCB and check the Error after setting remote controller address Check if controller PCB damage Check Point 2 Wrong RCgroup setting The given address number by auto setting 00 and the manual set number Except 00 were not existing in one RCG The remote controller address setting by U I were not existing same addr...

Page 52: ...out of specified rule Forecast of Cause 1 Wrong wiring Number of I U RC in RCgroup 2 Indoor unit controller PCB defective Check Point 1 Wire installation Wrong number of connecting indoor unit Check Point 2 Check Indoor unit controller PCB Check if controller PCB damage Check if controller PCB and check the Error after setting remote controller address Indicate or Display Error code 29 OK Outdoor ...

Page 53: ...any electronic equipment which causes harmonic wave Note EEPROM EEPROM Electronically Erasable and Programmable Read Only Memory is a non volatile memory which keeps memorized information even if power is turned off It can change the contents electronically To change the contents it uses higher voltage than normal and it can not change a partial contents Rewriting shall be done upon erasing the al...

Page 54: ...otor OK OK OK Rotate the fan by hand when operation is off Check if fan is caught dropped off or locked motor If Fan or Bearing is abnormal replace It Check excessively high temperature around the motor if there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check Point 4 Replace Controller PCB If Check Point 1 3 do not improve the symptom replace ...

Page 55: ... the Manual Auto Switch becomes ON for consecutive 60 or more seconds 1 Manual auto switch failure 2 Controller PCB and Indicator PCB failure Check Point 1 Check the Manual auto switch Check if Manual auto switch is kept pressed Check Point 2 Replace Controller PCB If Check Point 1 do not improve the symptom change Controller PCB and Indicator PCB Check ON OFF switching operation by using a meter ...

Page 56: ...ved Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 1 Check external cause at lndoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Chec...

Page 57: ...cation PCB defective 2 Indoor unit controller PCB defective Check Point 1 Check the connection of terminal Indoor unit Check the connection the communication PCB and the controller PCB After turning off the power supply check correct the followings If the Check point 1 is ok replace the communication PCB Indicate or Display Error code 3A 02 14 Check Point 3 Replace the controller PCB If condition ...

Page 58: ...d connector or incorrect wiring OK OK Check Point 3 Check Voltage of Controller PCB DC 5 0V Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Controller PCB and execute the check operation again Trouble shooting 14 INDOOR UNIT Error Method Indoor Room Thermistor Error Indicate or Display 02 15 DC Error code 41 Outdo...

Page 59: ...uble shooting 15 INDOOR UNIT Error Method Indoor Heat Ex Thermistor Error Indicate or Display 02 16 Error code 42 Outdoor unit n n times blinking Light ON Light OFF Mode Error L1 L2 L6 L5 L4 L3 2 5 15 Resistance value k Temperature C Temperature C Resistance value k 30 25 20 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 1013 1 729 1 531 5 392 3 292 9 221 1 168 6 129 8 100 9 79 1 62 5 49 8 40 0 3...

Page 60: ...r If Fan or Bearing is abnormal replace It Check excessively high temperature around the motor if there is any surrounding equipment that causes heat Upon the temperature coming down restart operation When the fan motor speed is less than 1 3 of the target fan speed for 56 seconds When detect the 0 rpm for 56 seconds after fan motor started Check Point 4 Replace Power Supply PCB If Check Point 1 3...

Page 61: ...horted connector wire 3 Controller PCB failure 4 Drain pump failure 5 Hose clogging Check Point 2 Check Connector and Wire Check loose contact of CN9 shorted wire pinched wire Replace Float switch if the wire is abnormal OK Check Point 3 Check Drain hose Check Drain hose If there is Hose clogging Please clear the clog 02 18 Indicate or Display Error code 53 Outdoor unit n n times blinking Light ON...

Page 62: ... 1 Reset Power Supply and operate Does Error indication show again Check Point 1 2 Check external cause Check if temporary voltage drop was not generated Check if momentary open was not generated Check if ground is connection correctly or there are no related cables near the power line Change Main PCB Access to EEPROM failed due to some cause after outdoor unit started 02 19 Indicate or Display Er...

Page 63: ...played again Check Point 1 2 External cause Check if temporary voltage drop was not generated Check if temporary open was not generated Check if ground is connected correctly or there are no related cables near the power line Check Point 2 Check the wiring Connector and wiring connection state check Cable open check Check Point 3 Replace Inverter PCB Replace Outdoor unit Inverter PCB OK Check Poin...

Page 64: ...ge Main PCB Check Point 1 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may ...

Page 65: ...rror Outdoor unit Main PCB 1 Outdoor unit Main PCB failure When the signal from FO terminal of IPM is L 0V while the compressor stops Check Point 1 Replace Main PCB Replace Outdoor unit Main PCB Error code 65 02 22 Trouble shooting 21 Outdoor unit n n times blinking Light ON Light OFF Mode Error L1 L2 L6 L5 L4 L3 2 6 5 ...

Page 66: ...thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB P15 3 4 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation again 02 23 Trou...

Page 67: ...the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB P10 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation again 02 24 Trouble shooting 23 Detective Actuators Detective details OUTDOOR UNIT Error Method Indicate or Display Error code 72 P10 THERMISTOR COMPRESS...

Page 68: ... thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB P15 1 2 voltage value 5V Main PCB P1 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation again 02 25 Trouble shooting 24 Detective...

Page 69: ...he thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB P5 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation again 02 26 Trouble shooting 25 Detective Actuators Detective details OUTDOOR UNIT Error Method Indicate or Display...

Page 70: ...ermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Inverter PCB DC5 0V Main PCB P700 1 3 voltage value 5V Remove the thermistor from Inverter PCB check the voltage If the voltage does not appear replace Inverter PCB and execute the check operation again 02 27 Trouble shooting 26 Detective Actuators Detective details OUTDOOR UNIT Error Method Indicate o...

Page 71: ...nt drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 1 1 Reset Power Suppl...

Page 72: ...int 1 Check the high pressure switch connection state Connector and wiring connection state check Cable open check Check Point 2 Check the high pressure switch characteristics Switch characteristics check For the characteristics of high pressure switch refer to below Check Point 3 Replace Inverter PCB Change Inverter PCB and execute the check operation again Type of contact Characteristics of pres...

Page 73: ...elow continuously for 30 seconds or more Ps 0 or Ps 5 MPa 1 Connector connection failure 2 Pressure sensor failure 3 Main PCB failure Check if the terminal connection is loose Check if connector is removed Check if connector is erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check voltage of Main PCB Measure at Main PCB side connector...

Page 74: ...on defective foreign matter on hear exchanger excessive rise of ambient temperature 2 Main PCB 3 Inverter compressor failure lock winding short 4 Inverter PCB Protection stop by overcurrent generation after inverter compressor start processing completed generated consecutively 10 times The number of generations is reset if the start up of the compressor succeeds No obstructions in air passages Hea...

Page 75: ...utdoor unit n n times blinking Light ON Light OFF Mode Error L1 L2 L6 L5 L4 L3 2 9 5 Detective Actuators Detective details Forecast of Cause Outdoor unit Inverter PCB Outdoor unit Main PCB Compressor 1 Defective connection of electric components 2 Inverter PCB failure 3 Main PCB failure 4 Compressor failure Protection stop by overcurrent generation at inverter compressor starting restart generated...

Page 76: ...iagram and the voltage Measure at Inverter PCB side connector If the voltage is not correct replace Inverter PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor stops If and repeats 5 times in a row compressor and fan motor stops...

Page 77: ...Check Point 4 Replace Main PCB If Check Point 1 3 do not improve the symptom replace Main PCB Check Point 2 Check thermistor of Indoor unit Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor Refer to Trouble shooting 14 15 If defective replace the thermistor Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor Room Temperature Thermistor...

Page 78: ...nt 2 Check the EEV strainer Check Point 5 Check the refrigerant amount Leak check If the 3 way valve gas side was closed open the 3 way valve gas side and check operation 02 35 Check Point 1 Check if 3 way valve liquid side is open If the 3 way valve liquid side was closed open the 3 way valve liquid side and check operation 1 3 way valve not opened 2 EEV defective strainer clogged 3 Outdoor unit ...

Page 79: ...nt 2 Check the EEV strainer Check Point 5 Check the refrigerant amount Leak check If the 3 way valve gas side was closed open the 3 way valve gas side and check operation 02 36 Check Point 1 Check if 3 way valve liquid side is open If the 3 way valve liquid side was closed open the 3 way valve liquid side and check operation 1 3 way valve not opened 2 EEV defective strainer clogged 3 Outdoor unit ...

Page 80: ...e Outdoor ambient temperature lower than operating range Outdoor unit EEV operation check Strainer not clogged Check Point 4 Check the outdoor unit EEV strainer clogging Indoor unit EEV operation check Strainer not clogged Check Point 2 Check the EEV strainer clogging Suction pressure sensor characteristics check For the characteristics of the suction pressure sensor Check Point 6 Check the suctio...

Page 81: ...s 1 Foreign matter on heat sink heat sink dirty 2 Foreign matter on heat exchanger excessive ambient temperature rise 3 Heat sink temp thermistor defective Check Point 1 Check the heat sink state Check Point 3 Check the heat sink temp thermistor Heat sink foreign matter soiling check Check Point 2 Check the foreign matter and ambient temperature of heat exchanger Heat exchange foreign matter check...

Page 82: ...re is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding 02 39 2 3 TROUBLESHOOTING WITH NO ERROR CODE Check Point 3 Check Electrical Components NO Check the voltage of power supply Check if AC198 264V appears at Outdoor Unit Terminal L N AC Check Varistor in Power supply PCB Indoor unit If V...

Page 83: ... drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check the vol...

Page 84: ...circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding If the symptom does not change by above Check 1 2 3 replace Main PCB of Outdoor unit If the symptom doe...

Page 85: ...ts that obstruct the air flow route Check clogged Heat Exchanger Is the Valve open Is capacity of Indoor unit fitted to Room size Any windows open Or direct sunlight Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check if Strainer is clo...

Page 86: ...on grille and front panel normal Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Is Main Unit installed in stable condition Is Fan Guard installed normally Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor PARTS INFORMATION 1 2 Water Leaking 1 Erroneous installation 2 Drain ho...

Page 87: ...r due to clogged dirt or less oil Replace Compressor Replace Compressor Replace Compressor Stops soon after starting up Is there open or loose connection cable Is Gas pipe valve open Low pressure is too low Check if Refrigerant is leaking Recharge Refrigerant Check if capillary tube strainer is clogged PARTS INFORMATION 3 If there is no failure the defect of Compressor can be considered Compressio...

Page 88: ...ng resistance of each terminal If the resistance value is 0 or infinite replace Compressor If the symptom does not change with above Check 1 2 replace Inverter PCB 02 45 Check Point 4 Replace Main PCB If the symptom does not change with above Check 1 3 replace Main PCB Resistance Value 1 125 at 25 C 36 type 0 766 at 20 C 45 54 type Inverter PCB RED WHITE BLACK Compressor V S U R W400 W401 W402 RED...

Page 89: ...tor Loose connector or open cable Remove connector check each winding resistance of Coil If Resistance value is abnormal replace EEV Remove Connector and check Voltage DC12V If it does not appear replace Main PCB Turn on Power and check operation noise If an abnormal noise does not show replace Main PCB When Valve is closed it has a temp difference between Inlet and Outlet If it is open it has no ...

Page 90: ... and GND terminal Vm DC voltage GND Earth terminal If they are short circuited below 300 k replace Outdoor fan motor and Main PCB Pin number wire color Terminal function symbol 1 Red 2 4 Black 5 White 6 Yellow DC voltage Vm No function 3 No function Earth terminal GND Control voltage Vcc Speed command Vsp 7 Brown Feed back FG Pin number wire color Terminal function symbol 1 Red 2 4 Black 5 White 6...

Page 91: ...Applicable Thermistors Discharge temp TH Compressor temp TH Outdoor temp TH Heatsink temp TH Heat exchanger TH 30 20 10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 1013 1 531 6 292 9 168 6 100 9 62 5 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 95 6 50 3 27 8 16 1 9 6 6 0 3 8 2 5 1 7 1 2 0 8 0 6 224 3 115 2 62 3 35 2 20 7 12 6 8 0 5 2 3 5 2 4 94 3 49 6 27 4 15 8 9 5 5 9 3 8 2 5 1 7 1 2 0 8...

Page 92: ...May 2020 Printed in Japan 3 3 17 Suenaga Takatsu ku Kawasaki 213 8502 Japan ...

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