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Fujitsu AB* A12GATH, Service Manual

The Fujitsu AB* A12GATH Service Manual is a comprehensive user guide that provides step-by-step instructions for optimizing the performance of your Fujitsu AB* A12GATH product. Easily downloadable and completely free, this manual is available exclusively on our website, ensuring quick access to all the necessary information you need to maximize your device's potential.

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Outdoor Temp Sensor Error

OK

Outdoor temp. sensor

Outdoor temp. sensor short or open detected

1. Connector connection defective, open

2. Sensor defective

3. Main PCB defective

OK

Check Point 1 : Check the connector connection and cable open

Connector connection state check
Cable open check

Check Point 2: Check the sensor

Sensor characteristics check (Disconnect the sensor from the PCB and check.)

* For the sensor characteristics, refer to the "Service Parts Information 24".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN144:1-3) voltage value = 5V

Remove the sensor from Main PCB, check the voltage.

Outdoor temp. sensor (CN144:1-3)

Indoor Unit     :  Operation LED 9 times Flash, Timer LED 15 Times Flash, 

                            Filter LED Continuous Flash.

Outdoor Unit  :  E. 7 4. 1

Error Code      :  9 U  /  7 4

If the voltage does not appear, replace Main PCB and set up original address.

Trouble shooting  41             E74. 1

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause : 

1

2

3

BLACK

BLACK

THERMISTOR (OUT TEMP.)

CN144

Caution

 By changing of DIP SW 4-2 to ON,  the Back-up operation can start when the active outdoor unit exists on the multi outdoor unit connection.

  (Stand alone outdoor unit is impossible)

 The following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)

  - The operating compressor life time becomes shorter.

  - The operating performance may drop due to the limited active compressor(s). 

  - The compressor may stop frequently by protection controlling.

  *In order to keep the operating capacity, the release of the Low noise mode setting might be necessary.

1

2

3

04-53

DC

Summary of Contents for AB* A12GATH

Page 1: ...Large Capacity Multi VRF System DC Inverter Control Compressor Long Piping System Design High Efficiency Refrigerant R410A Multi Air Conditioning System for Buildings SERVICE MANUAL ...

Page 2: ... 2 4 FAN CONTROL 02 08 2 5 EXPANSION VALVE CONTROL 02 10 02 08 02 14 2 6 4 Low noise mode 2 4 1 Cooling operation 02 09 2 4 2 Heating operation 1 2 5 Piping installation inspection 01 07 1 2 6 Refrigerant charge amount inspection 01 08 1 2 7 3 way valve opening inspection 01 08 1 3 1 Power source check 1 3 2 Error indication check 1 3 4 Transmission line connection check 01 09 01 09 01 11 1 3 3 In...

Page 3: ... 03 18 3 7 1 System Configuration 03 18 3 7 2 Fundamental Functions 03 19 3 7 3 Fundamental Functions 03 20 2 7 PROTECTIVE FUNCTION 02 16 02 16 2 7 1 Discharge temperature protection 02 18 2 7 2 High pressure protection 02 20 2 7 3 Low pressure protection 02 21 2 7 4 Heatsink temperature protection 02 21 2 7 5 Compressor temperature protection 02 21 2 7 6 O U Heat Ex 1 2 Gas Temp abnormal stop 02 ...

Page 4: ...N 4 2 2 Indoor Unit Display 04 01 04 01 04 02 04 03 04 04 4 2 4 Remote Controller Display 4 2 3 Outdoor Unit Display 04 04 4 2 5 Trouble shooting index Error code List 04 06 4 2 7 Trouble level of system 04 08 4 2 8 Error History mode 04 09 04 05 4 3 SERVICE INFORMATION Network communication abnormal 04 100 4 5 SERVICE PARTS INFORMATION 04 105 4 2 1 Error code Display 04 03 4 2 6 Trouble shooting ...

Page 5: ...1 TEST RUN ...

Page 6: ...ater leakage Prevention of water leakage Refrigerant leakage will cause low performance and abnormal stopping Refrigerant leakage will cause low performance and abnormal stopping Mixing in of vacuum pump oil by reverse flow will cause equipment trouble Prevents degradation of the oil by completely removing water and air Always use a level and keep the indoor unit level If the equipment is tilted t...

Page 7: ...ant A leak tester for other than R410A cannot detect leaks Handover explanation of operation In case of Auto Address setting Test run adjustment Addition refrigerant charging 1 2 3 Power source installation inspection Field setting and setting inspection Transmission wire installation inspection 4 Piping installation inspection Before starting the installed system the final inspection is necessary...

Page 8: ...urce Indoor Unit Power supply 1 198 264V 50Hz Circuit Breaker Size A Check Leakage current vs number of IUs 20A breaker for one circuit Leakage current as follows No of units vs leakage current 30mA for 12 nos IUs 100mA for 40 nos IUs 200mA for 81 nos IUs 300mA for 122 nos IUs Note MCA for total connected units IU less than 15A for 20A breaker capacity MCA means minimum circuit ampere Circuit numb...

Page 9: ... 5 4 Note setting for Master units OFF or ON Default OFF Y N Rotary SW setting Ref Add among Master Slave units Ref ADx10 Ref ADx1 Y N SET 5 SET 3 x 10 x 1 REF AD Check contents Ref circuit name _________________ Ref address ____ 00 99 Model Name Serial No Outlook Function setting by DIP SW Off On Add Setting by Rotary SW Access hole for maintenance For Duct type Cassette type units RC wiring conn...

Page 10: ... 3 1 2 4 Transmission wire installation inspection sheet 2 3 Indoor unit Outdoor unit Master unit Refrigerant system Check Item Check contents Judgement Present Status Number of ref circuit connected in the network system ______ Ref addresses _______________ 00 99 VRF Network System Network wiring Total transmission line length Wiring length 3600m Value taken from Network Design Drawing m Network ...

Page 11: ... Room Air conditioning system Total _______ No of BACnet Gateway One BACnet Gateway per VRF Network System Total _______ Terminal Register One per Network Segment refer to table 9 Total _______ No of Network Convertor for LonWorks One per VRF Network System IU 128 OU 100 NOTE Special VRF Network system configuration IU number _____ OU number _____ Check Item Check contents Judgement Present Status...

Page 12: ...paration tube and farthest IU farthest IU closest IU 60m farthest IU closest IU 60m farthest IU closest IU 60m 90m Between first separation tube and farthest IU 90m Between farthest OU and first OU branch kit 12m Between first separation tube and farthest IU 90m Between OU and OU branch kit 3m Between OU and OU branch kit 3m m Total Pipe Length 1000m Total Pipe Length 1000m Total Pipe Length m m m...

Page 13: ...efrigerant system overall refrigerant amount 31 5 kg for 1 OU 63 0 kg for 2 OUs and 94 5 kg for 3 OUs Overall refrigerant amount kg in the refrigerant system Factory charged refrigerant kg for OU Total additional amount of charged refrigerant kg Additional charged refrigerant for OU Additional charged refrigerant for connecting pipe Factory charged refrigerant for outdoor unit AJ 072L or AJ 090L 1...

Page 14: ...___ IU address _______ Indoor Unit For Wall mounted Universal Celling Small Cassette Check IU operation LED timer LED condition Judgment must be flashing alternately Yes No For Large Cassette and Duct type IU Check Wired RC 3 wire display screen Judgment Clock display AM 12 00 will appear Yes No Check Wired RC 2 wire display screen Judgment Language selection screen will appear Yes No Yes No Yes N...

Page 15: ...dress Checked by Service Tool Number of units and their address appeared in the System List must be same as the Actual Design value Judgment OK Not OK Connected number of IU ______ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ IU add _____ OK Not OK 1 3 3 Installe...

Page 16: ... No IU add _____ Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Check Contents Check items Checking method Judgement Present Status Ref circuit Name _________________ Ref address ________ select from 00 to 99 Design value Check status Transmission line connection confirmation Heating status Switching the operation of IU from cool to ...

Page 17: ...TH1 Pd HPS Ps LPS Reference mark of Service tool Check Contents Judgement Present Status Refrigerant Circuit Name _________________ Address ________ 00 99 Test run operation Heating mode Conducted by Service Tool Discharge refrigerant pressure should be Suction refrigerant pressure should be Discharge refrigerant temperature should be Discharge refrigerant superheat should be Degree of sub cool at...

Page 18: ...ion Monitoring condition Mode select condition Return to mode select condition Fuction select condition Function mode SWITCH POSITION SW107 SW108 SW109 MODE EXIT SELECT ENTER LED101 GREEN POWER MODE LED105 LED104 LED102 RED ERROR Push button switch 7 Segment LED Lamp Outdoor unit printed circuit board TEST RUN SETTING 2 Press SELECT button Monitoring mode Setting mode Error history mode For a deta...

Page 19: ...ng manual and perform operation check Check that there are no abnormal sounds or vibration sounds during test run operation Perform the test operation for 60 minutes 1 Standard wired remote controller UTY LNH UTY RNK button button and Stop the indoor and outdoor units Push the remote controller simultaneously for more than three seconds The air conditioner will start to conduct a test run and will...

Page 20: ...ng Optional 10 11 2008 Mar 02 20 PM Operation Setting OK Status On Setting screen Cancel Off On OK Status On Cancel OK On Off Auto Auto Cool Dry Fan Heat Operation Controlled High Med Low Quiet Meeting Room 24 0 C operation R C Prohibition Mode Set Temp Fan Optional Setting All On Off Filter Timer Temp Mode On 10 11 2008 Mar 02 20 PM AirFlowDirection Economy AntiFreeze FilterSign TestOperation Con...

Page 21: ... Page and press Test Run the Test run screen is displayed 4 Press OK The test run continues for 60 minutes To interrupt test run before it is complet return to the Monitor Mode Screen and press ON OFF 6 2 wire type wired remote controller Monitor Mode Screen Main Manu Screen Maintenance Screen UTY RNR Test Run Screen 01 16 ...

Page 22: ... or stops All units in the same refrigerant circuit will start to conduct a test run in accordance with the operation mode set by push switch of outdoor unit see 1 2 3 4 After 60 minutes passes the test run stops 5 Test running initialization is shown below The temperature controlling on the test run operates regardless of setting temperature Fan speed Hi Hi Hi Hi Vertical Air Direction Panel Swin...

Page 23: ...mation on Thermistor 5 The value of the Thermistor 5 is displayed 99 9 999 9 35 Information on Thermistor 6 The value of the Thermistor 6 is displayed 99 9 999 9 36 Information on Thermistor 7 The value of the Thermistor 7 is displayed 99 9 999 9 37 Information on Thermistor 8 The value of the Thermistor 8 is displayed 99 9 999 9 38 Information on Thermistor 9 The value of the Thermistor 9 is disp...

Page 24: ... Available setting number is 001 to 200 4 When the electricity meter pulse setting is set to 0000 the pulses input to CN135 become ineffective Available setting number is 0001 to 9999 00 Batch stop Change of function 1 Switching between batch stop or emergency stop protection fan mode setting 1 in low noise mode level setting function 2 C 01 19 Push switch on outdoor unit PCB 03 Forbidden Forbidde...

Page 25: ...th the centralized control device are released Setting Mode ITEM CODE No Setting Function Default ITEM CODE No Install and maintenance 2 Automatic address setting operates for indoor unit of same refrigerant circuit F3 01 20 Error code which manual error release will be required A5 1 Low pressure abnormal 84 1 Current sensor 1 error 93 1 Inverter compressor start up error 94 1 Trip detection A1 1 ...

Page 26: ...Cool air prevention 00 Super low 01 Follow the setting on the remote controller 46 External control 00 Start Stop 01 Emergency stop 47 Error report target 00 All 01 Display only for central remote control ITEM CODE No Function 1 Classification 26 32 00 01 02 03 04 05 06 07 08 09 31 0 Pa 10 Pa 20 Pa 30 Pa 40 Pa 50 Pa 60 Pa 70 Pa 80 Pa 90 Pa 25 Pa Standard Static Pressure setting Slim Duct Only The ...

Page 27: ...mode 07 SP mode 08 SP mode 09 SP mode 10 SP mode 11 SP mode 12 SP mode 13 SP mode 14 SP mode 15 SP mode 16 SP mode 17 SP mode 18 SP mode 19 SP mode 20 SP mode 21 SP mode 22 Normal SP Static Pressure setting Outdoor air unit Only The Range of static pressure is different from one model to other 02 Foreced stop Start Stop by RC is restricted 00 01 02 mode 00 mode 01 mode 02 1 Auto restart is an emar...

Page 28: ...2 OUTDOOR UNIT OPERATION CONTROL ...

Page 29: ...s the temperature of refrigerant Heat Ex 2 liquid temp Sensor Detects the temperature of refrigerant 24 25 Pressure regulation valve Operates in regulated pressure 4 00MPa 26 Outdoor unit EEV1 Controls the flow of ref based on target pressure 27 Outdoor unit EEV2 Controls the flow of ref based on target pressure 29 Liquid pipe temp Sensor 1 Detects the temperature of liquid refrigerant Outdoor uni...

Page 30: ...the temperature of discharge airflow Discharge airflow temp thermistor Heat exchanger Operates as Condensor Evapolator Fan motor Controlled by setting protection Thermo OFF Heat exchanger inlet thermistor Detects the temperature of refrigerant Fan motor Controlled by setting protection Thermo OFF Electric expansion valve Controlled by setting protection Thermo OFF Solenoid valve Bypass Opens at Th...

Page 31: ...V Power supply The allowable current is 1A or less LON WORKS Inverter communication External input 1 CN131 Low noise mode operation External input 2 CN132 Cooling Heating priority External input 3 CN133 Outdoor unit operation peak control External input 4 CN134 Emergency stop operation Electricty meter pulse input CN135 Non voltage contact input Single LED 101 Single LED 102 LED display Address an...

Page 32: ...equirement capacity or heating requirement capacity the compressor is stopped But in the following case the compressor operates in accordance with operation of each mode During 3 minute restart prevention operation Icing protection Failure Refer to chapter 4 TROUBLE SHOOTING Under expansion valve initialization At protective operation Emergency stop Defrost operation 2 3 COMPRESSOR OPERATION Peak ...

Page 33: ...speed 80rps Maximum speed 90rps Outdoor temperature Cold Start start process Condition Outdoor temperature below 21 and the system stopped for more than 1 hour rps sec 1 min or Max 15 min 70 Normal control starts The Normal start process Except the condition of Cold start The first target speed is decided by indoor unit capacity demand The upper limit speed at starting is made 60 rps and is raised...

Page 34: ...d heating load can be supplied from compressor efficiently The inverter compressor is able to control the amount of required refrigerant circulation in details 2 Target low pressure and high pressure control In order to make the evaporation pressure of the indoor unit at the proper pressure on a variety of operations capacity of the compressor will be controlled by low pressure sensor In order to ...

Page 35: ...of the compressors in accordance with the below sequence Starting sequence condition Example Starting sequence Compressor started first compressor stopped last Starting sequence Compressor started 2nd compressor stopped 2nd from the end Starting sequence Compressor started 3nd compressor stopped 3nd from the end Starting rotation execution Start Oil recovery example INV INV INV INV INV INV INV INV...

Page 36: ...tion range and heat sink temperature 75 C The outdoor fan speed at start up is 300 rpm 35 0 52 0 40 4 46 6 54 0 High pressure saturation temp Outdoor temperature Upper limit of target high pressure saturation temp Low limit of target high pressure saturation temp Target high pressure saturation temp The fan speed is controlled to keep high pressure saturation temperature within the target range as...

Page 37: ...ermittent fan step always start from 300rpm 7sec When there was a change during intermittent step 1 6 switching is performed at the time the current speed duration time reaches time up 7 sec 7 sec 7 sec 300 rpm T sec T sec 0 rpm Normal fan step Intermitten fan step Time Fan speed 20 21 rpm Heating Operating range 920 970 The fan speed during all heating is constant with Fan step 16 regardless of t...

Page 38: ...mode 480 pulses Heating When power turned On When operation stopped Cooling Heating 0 pulse 0 500 pulses EEV 3 SH control TH7 TH8 LPS Target SH 4 Protection TH1 LPS SH control TH6 LPS Target SH 4 Protection TH1 Contrl and detection The EEV controls the flow of refrigerant SCHEX HEX1 TH2 EEV2 EEV1 TH4 EEV3 TH6 TH5 TH7 TH8 TH9 TH10 4WV1 FAN1 4WV3 4WV2 HEX2 ...

Page 39: ...ears on the simple remote controller The operation indicators LED of the indoor units flash slowly Others Start condition End condition 30 seconds have elapsed since the start and suction temperature low pressure saturation temperature 5deg at all outdoor units or 6 minutes have elapsed since the start Operation COMPRESSOR Performed by all INV compressors operating up until now INV speed varies de...

Page 40: ... 6 C If the calculated result is lower than 27 6 C the judgment temperature is defined as 27 6 C If the calculated result is higher than 6 C the judgment temperature is defined as 6 C Defrosting start judgment temperature are determined by the outdoor temperature Less than 10 minutes operation at outdoor temperature below 2 occured 20 times Defrosting start condition Defrosting end condition Condi...

Page 41: ...g process Actuator Slave 1 Slave 2 Compressor in operation Compressor in operation Stopped compressor Master Slave 1 Slave 2 Master Slave 1 Slave 2 Master INV INV INV INV INV INV INV INV INV Compressor operate by the lowest speed 20rps Outdoor units which satisfied the defrosting end judgment temperature are operated at the lowest speed 20rps for inverter compressor When the defrosting of all outd...

Page 42: ...6 4 Low noise mode When the low noise mode setting ON from Push SW or External input or System controller Input the outdoor unit operates in the low noise mode as follows External Input CN131 on Master O U OFF ON 50rps 62rps 50rps 50rps 47rps 50rps 52rps Capacity shortage Capacity shortage condition When the compressor capacity is not enough Compressor operates with upper limit capacity for long t...

Page 43: ...e fan step upper limit at the interval set by PUSH SW This mode ends when the outdoor temperature becomes 7 or more or operation starts 1 min 1 min 1 min 1 min Int Int Int Max fan step Time Fan step 30 5 10 20 Interval time Int min PUSH SW setting F2 23 00 01 02 03 Interval setting setting standard setting setting setting When the Snow Falling protection is not neccesary change the Function settin...

Page 44: ...Discharge temperature Above 107 C Below 105 C Outdoor unit rotation execution After rotation has been executed once it is executed every 15 minutes Discharge temperature Above 105 C Below 100 C Compressor speed decrease 6rps every 30 sec until it becomes the cancelation condition Discharge temperature Above 90 C Heating Heating main EEV s of operating indoor unit in heating mode incl the Thermo OF...

Page 45: ...be cancelled when the temperature is in the range color orange R S DTP COMP STOP Error Indication Protection controlling range in Heating mode R S R S DTP3 limited Compressor speed controlling DTP1 EEV3 Liquid injection controlling DTP5 EEV1 EEV2 opening controlling R S 80 90 95 97 100 102 105 115 S R DTP4 Indoor unit EEV opening controlling Note In heating mode there are 5 kind of discharge temp ...

Page 46: ...5 sec elapsed and Below 3 19 3 49 Mpa 25 sec elapsed and Below 3 78MPa 25 sec elapsed and below 3 24 3 54 MPa Compressor rotation speed degrease 18 5 rps 15 0 rps every30 sec until cancel condition AJ 108 126 144 162L The value in when the compressor is operating more than 30Hz Pattern 1 Above 4 00MPa 5 minutes elapsed and Below 3 50MPa Corresponding outdoor unit stops Pattern 2 Pattern 1 generate...

Page 47: ... ON HPP2 Pattern1 SV2 ON Abnromal HP protection Pattern 2 Compressor rotation speed lessen 18 5 rps 15 0 rps 30sec AJ 108 126 144 162L R S S 3 50 3 49 3 54 3 60 3 64 3 70 3 80 4 00 4 20 MPa Abnromal HP protection Pattern 1 Compressor rotation speed rise up prohibit R S Note In heating mode there are 6 kind of high pressure protections are existing Target pressure controlling will be cancelled when...

Page 48: ...EEV2 set 52 plus Below 0 16MPa 3minutes elapsed and above 0 18MPa Compressor rotation speed lessen in the limited time until above 0 17Mpa Compressor rotation speed rise up prohibit Pattern 1 Below 0 05MPa or 0 10MPa for 10minutes 3minutes elapsed and Above 0 17Mpa Corresponding outdoor unit stops Pattern 2 Pattern 1 generated 5 times within 180 minutes Error reset push button SW executed after po...

Page 49: ...evice Operation Cool Heat Display Compressor temperature protection stop Compressor temp sensor TH11 EA31 P4 2 7 5 Compressor temperature protection Start condition Release condition Pattern 1 Compressor temperature above 115 C 3 minutes have elapsed and Discharge temp below 80 C Corresponding outdoor unit stops Pattern 2 Pattern 1 generated 2 times within 40 minutes Error reset push button SW exe...

Page 50: ...Heat Display 2 7 8 Compressor Frequency Maximum setting protection Start condition Release condition Filter PCB Current transformer Pattern 1 Current value more than 16 0A AJ 072L 20 2A AJ 090 108L 33 0A AJ 126 144 162L Current value less than the start condition Compressor speed rise up prohibited Compressor Frequency Maximum setting protection Pattern 2 Current value more than 17 0A AJ 072L 21 2...

Page 51: ...tton SW executed after power turned on Fan Motor and Compressor Stop Error indication Fan Motor driver protection stop E97 9 When the Driver PCB detects the following abnormalities Driver PCB defective Fan motor defective short circuit Main PCB defective DC output abnormal lose connection or Disconnecting wire Protective function Detect device Operation Cool Heat Display 2 7 11 EEV Coil abnormal S...

Page 52: ...3 INDOOR UNIT OPERATION ...

Page 53: ...ing operation fan speed is decided by the difference between the room temperature and the set temperature 1 The indoor fan starts operation 5 seconds after the electric expansion valve opens However when the indoor unit just starts its operation or the operation mode is changed from other to DRY and the refrigerant circulation is not stopped the fan will rotate immediately without a delay time of ...

Page 54: ...dry from the connected indoor units There are 3 priority modes of Neutral Cooling Priority and Heating Priority The operation modes restricted by each of these modes are as follows Priority mode Neutral Cooling priority Heating priority Restricted operation mode No restrictions Heating Cooling dry Neutral Cooling priority Heating priority Cooling priority Heating priority 1 Priority mode decision ...

Page 55: ...r unit regardless of the current priority mode The priority mode is fixed at either cooling or heating even if the master indoor unit stops Cooling heating switching can be performed by the master indoor unit only 4 Opposite operation mode When the operation mode commanded from an indoor unit remote controller and the operation mode allowed by the system cooling and dry operation for cooling only ...

Page 56: ...ol Each operation mode is controlled as below Outdoor air unit fan motor OFF Electric expansion valve Stop pulse Solenoid valve Closed Operates according to the HIGH MODE setting Heat Pulse controlled by the temperature difference Each operation mode is controlled as below Fan Operates according to the HIGH MODE setting Stop pulse Closed at all times Opened at thermostat off and compressor on Clos...

Page 57: ...shifting to Cooling Priority or Heating Priority the priority mode shifts to Neutral only when there was a Stop input from all the indoor units Method 2 Management by Outdoor unit Operation mode management is made Management by Outdoor unit by Outdoor unit PUSH SW field setting The priority mode shifts to Cooling Priority or Heating Priority in accordance with input from the Outdoor unit regardles...

Page 58: ...nit by outdoor unit DIP SW 2 Set the master indoor unit by wired remote controller 3 Judge cooling heating by the difference between the master indoor unit s setting temperature and the room temperature Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation NO NO Thermostat remains in OFF state for 6 minutes or longer System s...

Page 59: ... s setting temperature and the suction airflow temperature Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation NO Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation YES Function is available when an outdoor air unit set as the administrative indoor ...

Page 60: ... of refrigrant flow The thres hold temperature of stop of refrigrant flow Ts 0 5 C Ts 0 5 C 3 2 6 HEAT Position 1 When using the heating mode set the temperature to a value higher than the current room temperature otherwise the indoor unit will not start the heating operation 3 An example for HEATING TEMPERATURE CONTROL time chart Manual setting During defrosting the OPERATION indicator lamp flash...

Page 61: ...on An example for HEATING TEMPERATURE CONTROL time chart Manual setting During defrosting the OPERATION indicator lamp flashes 6 sec ON and 2 sec OFF and repeat The heating operation will be temporarily interrupted Excess capacity area Compressor ON 6 minutes 100 0 ON Outdoor temp Ts Corrected setting temperature Ts 5 C Ts 0 5 C The thres hold temperature of start of refrigerant flow Ts 5 C for 5 ...

Page 62: ...r direction adjustments within the ranges shown above The vertical airflow direction is set automatically as shown in accordance with the type of operation selected During Cooling mode Horizontal flow During Heating mode Downward flow During AUTO mode operation for the first minute after beginning operation airflow will be horizontal the air direction cannot be adjusted during this period 1 4 1 Co...

Page 63: ...LL MOUNTED TYPE and COMPACT WALL MOUNTED TYPE 1 3 4 5 2 Press the VERTICAL SWING button for more than two seconds The remote controller s Vertical Swing Display will light up In this mode the UP DOWN air direction flaps will swing automat ically to direct the air flow both up and down Example When set to vertical swing 1 3 4 5 2 Press the HORIZONTAL AIRFLOW DIRECTION button The temperature display...

Page 64: ...ton for more than two seconds once and again The remote controller s Horizontal Swing Display will go out Airflow direction will return to the setting before swing was begun Example When set to horizontal swing Range of swing 03 12 The SWING operation may stop temporarily when the air conditioner s fan is not operating or when operating at very low speeds The swing operation is not available depen...

Page 65: ...or unit temperature if the room temperature becomes 0 5 C lower than the set up temperature EEV is fully closed 3 Special Control When the power is turned ON When it has passed the limited time since the last initialization When indoor unit stopping Oil recovery operation Controlled pulse Test run operation Controlled pulse Icing protection control Fully closed Pump down operation Fully open Defro...

Page 66: ...oling operation 1 If the discharge airflow temperature becomes 5 C lower than the set up temperature EEV is fully closed 2 If the suction airflow temperature becomes 0 5 C lower than the set up temperature EEV is fully closed Heating operation 1 If the discharge airflow temperature becomes 5 C higher than the set up temperature for 5 minutes or more EEV is fully closed 2 If the suction airflow tem...

Page 67: ...ates 6 When the float switch turns OFF within 3 minutes the unit starts cooling operation 1 2 3 5 2 DRAIN PUMP OPERATION for Outdoor air unit 1 When cooling and refrigerant circulation starts the drain pump starts simultaneously 3 When the refrigent circulation is stopped by a start of indoor heat exchanger frost prevention operation the drain pump will turn off in 1 hour after the end of indoor h...

Page 68: ... EEV Control pulse During the above operation a refrigerant noise may be from the indoor unit The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation 1 Starting Condition Compressor is operation more than 3 minutes When Heat exchanger inlet temperature TA continues 4 minutes or more Compressor is operation more than 3 minutes When Heat exchanger outlet tempera...

Page 69: ...on airflow temperature rises 21 C Forced thermostat off and Fan off Heating operation 5 C Suction airflow temperature rises 10 C Forced thermostat off and Fan off Fan operation 5 C Suction airflow temperature rises Suction airflow temperature drops 10 C Forced thermostat off and Fan off Suction airflow temperature drops 7 C 5 C Suction airflow temperature drops Fan operation 7 C 5 C Suction airflo...

Page 70: ...nected Interface External input External output Interface External input External output Contents Contents Operation ON OFF Operation mode Cool Heat Set temperature or capacity request Analog input Error Operation ON OFF Error Special operation defrost Remarks Typical indoor unit is required for mode changing Temperature setting When thermo control is performed by DX kit Capacityrequest When the t...

Page 71: ...input Capacity input Selection Intake temperature Room temperature Cooling 18 to 30 C Heating 10 to 30 C Cooling Intake temperature Setting temperature 0 5 C Heating Intake temperature Setting temperature 0 5 C 0 5 to 100 Controlled by external controller and EEV closed by making the capacity input 0 in cooling mode EEV slightly opened when the Compressor operating in heating mode Controlled by ex...

Page 72: ...hart TR Ts Corrected Setting temperature Duration of cold air prevention TR Target controlling temperature Air intake temperature or Air discharge temperature TR Target controlling temperature Air intake temperature or Air discharge temperature Ts Corrected Setting temperature 0 5 C Air intake ctrl 0 5 C Air discharge ctrl 0 5 C Air intake ctrl 0 5 C Air discharge ctrl Ts Ts Indoor fan Opening of ...

Page 73: ... prevention operation the drain pump will turn off in 1 hour after the end of indoor heat exchanger frost prevention operation 4 When the water level in the drain pan rises up and then the float switch functions Microcomputer stops the refrigerant circulation and indoor fan motor operation Drain pump operates continuously for 3 minutes after the float switch is turned off Almost condensing water m...

Page 74: ...dry operation Heating operation Stop DX KIT EEV Control pulse During the above operation a refrigerant noise might hear from the EEV Kit The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation 1 Starting Condition Compressor is operation more than 3 minutes When Heat exchanger inlet temperature TA continues 4 minutes or more Compressor is operation more than 3...

Page 75: ...4 TROUBLE SHOOTING ...

Page 76: ...ication type Opposite Operation Mode 4 1 NORMAL OPERATION 4 TROUBLESHOOTING 4 1 1 Indoor Unit Display Filter Filter LED Continuous lighting ON OFF ON OFF 1 sec 1 sec 6 sec 2 sec ON OFF ON OFF Operation LED Timer LED Filter LED Maintenance Mode 1 sec 1 sec 1 sec 1 sec 3 sec 1 sec ON OFF 1 sec 1 sec ON OFF Operation LED Timer LED Filter LED Location Notification 4 sec 1 sec ON OFF 04 01 This functio...

Page 77: ... Peak Cut Mode Starting condition Discharge temp fixed value 239 F 115 C Release condition 3 minutes have elapsed and discharge temperature 176 F 80 C Starting condition Compressor temp fixed value 239 F 115 C Release condition 3 minutes have elapsed and discharge temperature 176 F 80 C Starting condition Low pressure 7psi 0 05MPa or low pressure 15psi 0 10MPa continues for 10 mins Release conditi...

Page 78: ...t Error Ex 2 When the wired remote controller shows 4 2 Indoor unit Heat Ex Sensor Error 2 Confirm each Error code on each devices in case of Network communication Error Ex When the Network cable of indoor unit 00 disconnected during operating Operation LED 1 time blinking Timer LED 4 times blinking Error code 14 2 Error code 14 16 Error code 14 1 or 14 3 Network communication Error Indoor unit de...

Page 79: ... there is more than one error display is changed by SELECT short press When more than one indoor unit is abnormal display is changed by SELECT short press ENTER short press ENTER short press ENTER short press ENTER long press Short press less than 3 seconds Long press more than 3 seconds Annunciation Type of errors Address SELECT short press display change SELECT short press display change If some...

Page 80: ...code Outdoor unit Indoor unit Group remote controller Convertor 1 1 If an error occurs the following display will be shown will appear in the set room temperature display If is displayed immediately contact authorized service personnel 04 05 4 2 4 Remote Controller Display 1 Touch the Status on the Monitor mode screen 2 Touch the Error Information on the Status screen 2 digit numbers are correspon...

Page 81: ... 9 U 1 3 9 U 1 2 3 4 5 6 9 1 6 9 1 9 U 6 9 1 4 9 U 1 4 1 4 1 6 1 4 1 6 1 4 1 6 1 4 9 U 1 4 9 U 9 U 9 U No Display A LED 10 times Blinks J LED 13 times Blinks U LED 15 times Blinks 2 6 4 2 6 5 2 9 1 3 1 3 3 2 1 3 2 3 3 2 7 The number of indoor unit shortage Error Transmission PCB connection Error Communication Error between Controller and Indoor unit Address duplication in Wired remote controller s...

Page 82: ...shooting index No Error code Trouble shooting Error Contents Error condition Indoor Unit No Power Except Wall Mounted Indoor unit No Power Wall Mounted Outdoor unit No Power No operation Power is ON No Cooling Abnormal Noise Water leaking Indoor Unit No Power Outdoor air unit Peripheral device No Power Peripheral device FAN not operates Peripheral device No Cooling No Heating DX Kit No Power 72 73...

Page 83: ...r error 82 2 Sub cool Heat Ex gas outlet temp sensor error 83 1 Liquid pipe temp sensor 1 error 83 2 Liquid pipe temp sensor 2 error 62 6 Inverter communication error 63 1 Inverter error 68 2 Rush current limiting resister temp rise protection 3 71 1 Discharge Temp sensor 1 error 72 1 Compressor Temp sensor 1 error 73 4 Heat Ex 1 gas temp sensor error 73 6 Heat Ex 2 gas temp sensor error 74 1 Outd...

Page 84: ... gas outlet temp sensor error 83 1 Liquid pipe temp sensor 1 error 83 2 Liquid pipe temp sensor 2 error 62 6 Inverter communication error 63 1 Inverter error 68 2 Rush current limiting resister temp rise protection 3 71 1 Discharge Temp sensor 1 error 72 1 Compressor Temp sensor 1 error 73 4 Heat Ex 1 gas temp sensor error 73 6 Heat Ex 2 gas temp sensor error 74 1 Outdoor Temp sensor error 77 1 He...

Page 85: ...ay The newest History Number and Error Code are displayed by the 2 digits Light off Flashing Lighting The History Number changes sequentially from 00 to 09 by the SELECT button End of the Error History mode Mode Selection Display Monitor Mode Select the Error History Number Display details of the Error History ERROR HISTORY MODE 3 2 4 1 4 3 2 1 Error History Number 00 Error Code 71 4 2 8 ERROR HIS...

Page 86: ...ntroller PCB Check terminal voltage of controller PCB Connector CNC01 Power supply for Remote If DC12V Remote Control failure Controller PCB is OK Replace Remote controller If DC0V Controller PCB failure Remote is OK Replace Controller PCB In case of re installation is done due to removed connector or incorrect wiring turn on the power again Check Point 1 Check the connection of terminal After tur...

Page 87: ...mal 2 Mis setting 3 Wired Remote Control failure 4 Controller PCB failure Check Point 1 Check the connection of terminal After turning off the power check correct the followings Indoor Unit Check the connection of terminal between remote control and Indoor unit or between Indoor units and check if there is a disconnection or short of the cable Check Point 2 Check Remote and Controller PCB Check te...

Page 88: ... the number of connecting Indoor unit and Remote controller in one RCgroup exceeds more than 32 units Check Point 2 Check Indoor unit controller PCB The number of connecting indoor unit and Remote controller in one RCgroup were less than 32 units Forecast of Cause 1 Wrong wiring of RCgroup 2 Indoor unit controller PCB failure Check Point 1 Wire installation Wrong RCgroup setting Wrong wire connect...

Page 89: ...ation lines between outdoor units Check Point 4 Check the connection of communication lines between outdoor units Master unit State in which number of connected slave units by Dip SW and the number of slave units which can be recognized by communication did not match continued for 10 seconds or more after the start of control Slave unit State in which communication from the master unit was not rec...

Page 90: ... Check the indoor unit power supply Main power ON check Power cable connection and open check Check Point 3 Check the communication line connection DIP SW SET4 1 is OFF No communication for 180 seconds or more from an indoor unit which received communication once and no Outdoor unit network communication 2 error Check Point 4 Check the Terminal resistor setting Terminal resistor setting check Chec...

Page 91: ...t once received communication Check Point 4 Check the Terminal resistor setting Terminal resistor setting check Check Point 6 Replace Main PCB outdoor unit indoor unit Check Point 5 Check the communication PCB outdoor unit indoor unit Change Main PCB and set up the original address Detective details 1 Noise momentary open voltage drop 2 Indoor unit power off 3 Communication line connection defecti...

Page 92: ...B Replace Communication PCB of the Indoor units that have the error OK Forecast of Cause 1 Outside cause 2 Connection failure 3 Communication PCB failure 4 Controller PCB failure Check Point 1 Check if any outside cause such as voltage drop or noise Instant voltage drop Check if there is any electric equipment with a large load within the same circuit Momentary power failure Check contact failure ...

Page 93: ...er ON check Power cable connection and open check Check Point 3 Check the communication line connection Check Point 4 Check the Terminal resistor setting Terminal resistor setting check Check Point 6 Replace Main PCB and Communication PCB indoor unit outdoor unit Change Main PCB and Communication PCB and set up the original address Forecast of Cause Check Point 1 Find the indoor unit that the comm...

Page 94: ...change replace Controller PCB and set up the original address Check Point 1 2 Check outside cause such as noise Check the complete insulation of the grounding Check if there is any equipment that causes harmonic wave near the power cable Neon light bulb or any electronic equipment which causes harmonic wave Check Point 1 1 Reset the power Check Point 2 Check Connection YES NO Does LED error indica...

Page 95: ...gnal amplifier Refer to the Installation manual Check Point 3 Check Communication PCB Replace Communication PCB of the Indoor units that have the error OK Forecast of Cause 1 Outside cause 2 Connection failure 3 Communication PCB failure 4 Controller PCB failure Check Point 1 Check if any outside cause such as voltage drop or noise Instant voltage drop Check if there is any electric equipment with...

Page 96: ...n the duplicated address number exists in one RCgroup Check Point 3 Check Indoor unit controller PCB Forecast of Cause 1 Wrong wiring of RCgroup 2 Wrong remote address setting 3 Indoor unit controller PCB failure 4 Remote controller failure Check Point 1 Wire installation Wrong wire connection in RCgroup Please refer to the installation manual Change controller PCB and check the Error after settin...

Page 97: ...RC group Check Point 3 Check Indoor unit controller PCB Forecast of Cause 1 Wrong wiring of RCgroup 2 Wrong remote address setting 3 Indoor unit controller PCB failure 4 Remote controller failure Check Point 1 Wire installation Wrong wire connection in RCgroup Please refer to the installation manual Check if controller PCB damage Change controller PCB and check the Error after setting remote contr...

Page 98: ...heck noise momentary open voltage drop Check if power supply temporarily stops by outages or if strong noise is generated from surrounding environment during auto address Check Point 3 Check the communication line connection Indoor Unit No Display Outdoor Unit E 28 1 Error Code No Display Service tool does not indicate the Error code Auto Address Setting Error When none of the connected indoor uni...

Page 99: ...plifier auto address is set at the same time from multiple outdoor units master unit Check Point 4 Check noise momentary open voltage drop Check if power supply temporarily stops by outages or if strong noise is generated from surrounding environment during signal amplifier auto address Check Point 3 Check the operation of signal amplifier auto address setting Indoor Unit No Display Outdoor Unit E...

Page 100: ...rs Wired remote controller 2 Wire Indoor unit Controller PCB circuit Detective details When the number of connecting indoor units are out of specified rule Check Point 2 Check Indoor unit controller PCB 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 connceting indoor unit Change controller PCB and ...

Page 101: ...tive details When the number of connecting remote controller are out of specified rule Check Point 2 Check Indoor unit controller PCB Forecast of Cause 1 Wrong wiring Wrong number of connecting RC in RCgroup 2 Remote controller PCB defective Check Point 1 Wire installation Wrong number of connceting remote controller Change controller PCB and check the Error after setting remote controller address...

Page 102: ...lation defect is found correct it by referring to Installation Manual OK Check power supply voltage AC198 264V between Indoor unit terminal 1 and 2 Check connection of Connector any lose connector or incorrect wiring Check any shortage or corrosion on PCB OK Check Point 1 1 Reset Power Supply Does abnormal LED indication show again Check Point 1 2 Check outside cause Voltage drop or noise etc Inst...

Page 103: ...er 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 3 Replace Controller PCB Change Controller PCB and set up the original address Check Point 1 1 Reset Power Suppl...

Page 104: ...p or noise etc 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 Point 3...

Page 105: ... Voltage drop or noise etc 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 C...

Page 106: ...ler PCB Forecast of Cause 1 Terminal connection abnormal 2 Wired remote controller failure 3 Indoor unit controller PCB defective Check Point 1 Check the connection of terminal Indoor unit Check the connection of terminal between remote control and indoor unit or between Indoor units and check if there is a disconnection or short of the cable Check terminal voltage of controller PCB connector CNC0...

Page 107: ...et the power Check Point 1 Check connection of Connector Check if connector is loose or removed Check erroneous connection Check if sensor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring 6 5 35 8 0 30 10 0 12 5 15 8 20 2 25 9 33 6 3 03 2 77 2 50 2 22 1 94 1 66 1 39 1 15 3 68 3 48 3 27 25 20 15 10 5 0 Temperature 95 86 77 68 59 50 41 32 Temperature C F 3 6 4...

Page 108: ...eck if connector is loose or removed Check erroneous connection Check if thermistor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring OK OK Check Point 2 Remove connector and check sensor resistance value Check Point 3 Check voltage of Controller PCB DC5 0V Corresponding connector If the voltage does not appear replace Controller PCB and set up the original a...

Page 109: ...er when reinstalling due to removed connector or incorrect wiring OK Check Point 3 Check voltage of Controller PCB DC5 0V Corresponding connector If the voltage does not appear replace Controller PCB and set up the original address Duct type Cassette type Wall mounted type Floor Ceiling type Compact Wall mounted type Heat Ex Outlet temp Sensor Gray Wires CN9 Model Type CN21 04 33 DC Sensor Charact...

Page 110: ...fer to the PARTS INFORMATION 20 21 If Fan motor is abnormal replace it Check Point 1 Check rotation of Fan 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 Point 3 Check ambient temp around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upo...

Page 111: ...oil 4 Controller PCB DC 12V output abnormal 5 Noise momentary open voltage drop Trouble shooting 25 E52 1 Indicate or Display Detective Actuators Detective details INDOOR UNIT Error Method Forecast of Cause Check if the DC 12 is on between the pin No 1 of CN10 and Pin No 6 of CNB01 GND Disconnect the wire of EEV1 when you check the output of EEV1 OK Check if the circuit of EEV coil winding is good...

Page 112: ...ecast of Cause 1 Drain Installation 2 Drain pipe line blockage 3 Float switch defective 4 Shorted connector wire 5 Controller PCB defective Drain pump defective Check Point 5 Check controller PCB defective Drain pump defective Check Point 1 Check Drain pipe installation OK Check Drain pipe installation Refer to the installaion manual The Height limit for Drain pump The angle of drain pipe The angl...

Page 113: ...k Filter PCB Main or Main PCB 1 Noise momentary open voltage drop 2 Power supply defective 3 Filter PCB Main defective 4 Main PCB defective Outdoor unit Filter PCB MAIN Outdoor unit Main PCB Check the output voltage of Filter PCB Main Check if AC198 264V appears at W606 W605 Check the input voltage of Main PCB Check if AC198 264V appears at CN100 AC IN Indoor Unit Operation LED 9 times Flash Timer...

Page 114: ... supply Power cable connection open check Check Point 3 Check Filter PCB Main and Main PCB 1 Noise momentary open voltage drop 2 Power supply defective 3 Filter PCB Main defective 4 Main PCB defective Outdoor unit Main PCB Check Filter PCB Main and Main PCB Refer to Service Parts Information 3 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit...

Page 115: ...as not generated Check if ground is connection correctly or there are no related cables near the power line Check Point 2 Replace Main PCB Change Main PCB and set up the original address Check Point 1 1 Turn the power on again Error displayed again Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 6 2 3 Error Code 9 U 6 2 Trouble shooting 2...

Page 116: ...r Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 6 2 6 Error Code 9 U 6 2 Trouble shooting 29 E62 6 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Caution By changing of DIP SW 4 2 to ON the Back up operation can start when the active outdoor unit exists on the multi outdoor unit connection...

Page 117: ...execution and the power was turned back on Set contents sum value memorized in EEPROM and sum value calculated based on the set contents read from EEPROM do not match Regarding the sum value only the contents set in the push button SW setting mode F2 shall be the objective Reconfigure the setting of F2 setting mode by push button SW To clear the setting of F2 by Field setting all clear Check Point...

Page 118: ...ss Check Point 1 1 Turn the power on again Error generated again and the power was turned back on Check Point 1 2 Noise momentary open voltage drop Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 6 2 9 Error Code 9 U 6 2 Trouble shooting 30 1 E62 9 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecas...

Page 119: ... Service Parts Information 3 4 If the circuit of both terminal was open circuit exchange the Resistor Correct resistance value 5 3 6 0 Ohm When Inverter PCB short interruption detection or Rush current limiting resistor temp rise protection occurs Inverter error also occurs YES Check Point 2 Check error display Inverter PCB short interruption detection or Rush current limiting resistor temp rise p...

Page 120: ...supply to Filter PCB INV to Inverter PCB Connector and wiring connection state check Check Point 4 Check Main PCB Chack Main PCB Refer to Service Parts Information 3 4 Check Point 5 Replace Inverter PCB Replace Inverter PCB 1 Noise momentary power failure voltage drop 2 Magnetic Relay for Inverter coil side wiring disconnection open 3 Power supply to Filter PCB INV to Inverter PCB wiring disconnec...

Page 121: ...B Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 6 8 2 Error Code 9 U 6 8 Trouble shooting 33 E68 2 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause After fixing the problem and for canceling the Error Error Reset F3 40 will be required after power reset OK OK Check Point 4 Check the w...

Page 122: ...layed again Check Point 2 Check the communication PCB connection Communication PCB connection Lose connection check Check Point 3 Check the communication PCB Communication PCB check No any damages on the PCB replace the communication PCB Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Operation LED 1 time Flash Timer LED 4 Times Flash Filter LED Continu...

Page 123: ...sor 1 CN162 1 2 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 7 1 1 Error Code 9 U 7 1 Trouble shooting 35 E71 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause 1 2 3 4 5 6 7 8 BLACK BLACK BLACK BLACK THERMISTOR DIS TEMP 1 THERMISTOR COMP SHELL 1 CN162 Caution By changing of DIP SW 4...

Page 124: ...ge does not appear replace Main PCB and set up original address Trouble shooting 36 E72 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Main PCB CN162 3 4 voltage value 5V Remove the sensor from Main PCB check the voltage 1 2 3 4 5 6 7 8 BLACK BLACK BLACK BLACK THERMISTOR DIS TEMP 1 THERMISTOR COMP SHELL 1 CN162 1 2 3 4 5 6 7 8 Caution By cha...

Page 125: ... Unit E 7 3 4 Error Code 9 U 7 3 If the voltage does not appear replace Main PCB and set up original address Trouble shooting 37 E73 4 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause 1 2 3 4 5 6 BLACK BLACK BLACK BLACK THERMISTOR HEX LIQ 1 THERMISTOR HEX GAS 1 CN163 1 2 3 4 5 6 Caution By changing of DIP SW 4 2 to ON the Back up operation can s...

Page 126: ...r to the Service Parts Information 24 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN163 1 2 voltage value 5V Remove the sensor from Main PCB check the voltage Heat ex 1 liquid temp sensor CN163 1 2 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 7 3 5 Error Code 9 U 7 3 If the voltage does not appear replace Main PCB and set u...

Page 127: ...nit E 7 3 6 Error Code 9 U 7 3 If the voltage does not appear replace Main PCB and set up original address Trouble shooting 39 E73 6 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause 1 2 3 4 5 6 7 BLACK BLACK BLACK BLACK THERMISTOR HEX LIQ 2 THERMISTOR HEX GAS 2 CN164 1 2 3 4 5 6 7 Caution By changing of DIP SW 4 2 to ON the Back up operation can...

Page 128: ...to the Service Parts Information 24 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN164 1 2 voltage value 5V Remove the sensor from Main PCB check the voltage Heat ex 2 liquid temp sensor CN164 1 2 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 7 3 7 Error Code 9 U 7 3 If the voltage does not appear replace Main PCB and set up ...

Page 129: ...ash Outdoor Unit E 7 4 1 Error Code 9 U 7 4 If the voltage does not appear replace Main PCB and set up original address Trouble shooting 41 E74 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause 1 2 3 BLACK BLACK THERMISTOR OUT TEMP CN144 Caution By changing of DIP SW 4 2 to ON the Back up operation can start when the active outdoor unit exists ...

Page 130: ...ristics refer to the Service Parts Information 24 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN165 1 3 voltage value 5V Remove the sensor from Main PCB check the voltage Suction gas temp sensor CN165 1 3 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 7 5 1 Error Code 9 U 7 5 If the voltage does not appear replace Main PCB an...

Page 131: ...r LED Continuous Flash Outdoor Unit E 7 7 1 Error Code 9 U 7 7 If the voltage does not appear replace Inverter PCB Trouble shooting 43 E77 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause 1 2 1 2 BLACK BLACK THERMISTOR HEATSINK CN360 Caution By changing of DIP SW 4 2 to ON the Back up operation can start when the active outdoor unit exists on ...

Page 132: ...e Parts Information 24 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN142 7 8 voltage value 5V Remove the sensor from Main PCB check the voltage Sub cooling heat ex gas outlet temp sensor CN142 7 8 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 8 2 2 Error Code 9 U 8 2 If the voltage does not appear replace Main PCB and set up...

Page 133: ...ge of Main PCB DC5 0V Main PCB CN142 1 2 voltage value 5V Remove the sensor from Main PCB check the voltage Liquid pipe temp sensor 1 CN142 1 2 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 8 3 1 Error Code 9 U 8 3 If the voltage does not appear replace Main PCB and set up original address Liquid Pipe Temp Sensor 1 Error Trouble shootin...

Page 134: ...ge of Main PCB DC5 0V Main PCB CN142 3 4 voltage value 5V Remove the sensor from Main PCB check the voltage Liquid pipe temp sensor 2 CN142 3 4 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 8 3 2 Error Code 9 U 8 3 If the voltage does not appear replace Main PCB and set up original address Liquid Pipe Temp Sensor 2 Error Trouble shootin...

Page 135: ...h Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 8 4 1 Error Code 9 U 8 4 Current Sensor 1 abnormal Check Point 3 Check the wiring Power supply to Filter PCB INV to Inverter PCB OK Main power ON OFF state check Power cable connection open check Check Point 1 Check the power supply Trouble shooting 47 E84 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT ...

Page 136: ...sure sensor refer to the Service Parts Information 22 Main PCB CN118 1 3 voltage value 5V Remove the sensor from Main PCB check the voltage Discharge pressure sensor CN118 1 3 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 8 6 1 Error Code 9 U 8 6 If the voltage does not appear replace Main PCB and set up original address Trouble shootin...

Page 137: ... sensor Sensor characteristics check For the characteristics of the suction pressure sensor refer to the Service Parts Information 22 Suction pressure sensor CN119 1 3 Main PCB CN119 1 3 voltage value 5V Remove the sensor from Main PCB check the voltage Outdoor Unit E 8 6 3 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Error Code 9 U 8 6 If the voltag...

Page 138: ...n 23 Check Point 3 Replace Main PCB Change Main PCB and set up the original address Outdoor Unit E 8 6 4 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Error Code 9 U 8 6 High Pressure Switch 1 Error Caution By changing of DIP SW 4 2 to ON the Back up operation can start when the active outdoor unit exists on the multi outdoor unit connection Stand alo...

Page 139: ... Check Point 1 Check the Inverter PCB to inverter compressor connection state Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 9 3 1 Error Code 9 U 9 3 Trouble shooting 51 E93 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause After fixing the problem and for canceling the Error Error Re...

Page 140: ...utdoor unit fan operation heat exchanger ambient temperature Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 9 4 1 Error Code 9 U 9 4 Trouble shooting 52 E94 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause After fixing the problem and for canceling the Error Error Reset F3 40 will be...

Page 141: ...ing 53 E95 5 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause After fixing the problem and for canceling the Error Error Reset F3 40 will be required after power reset Caution By changing of DIP SW 4 2 to ON the Back up operation can start when the active outdoor unit exists on the multi outdoor unit connection Stand alone outdoor unit is imposs...

Page 142: ... 3 Fan motor defective Check Point 1 Fan rotation state check Check for the absence of foreign matter around the fan Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 9 7 1 Error Code 9 U 9 7 Trouble shooting 54 E97 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause After fixing the probl...

Page 143: ...etective details OUTDOOR UNIT Error Method Forecast of Cause 1 When outdoor fan motor cannot operate more than 470rpm fan motor and compressor stops 2 After fan motor restarts if fan motor cannot operate at 470rpm or more or the same operation is repeated consecutively 3 times within 60 minutes fan motor and compressor stops permanently Check the appearance and condition of mounting of Driver PCB ...

Page 144: ...malities the error signal is output Driver PCB defective Fan motor defective Layer short Main PCB defective DC output abnormal Lose connection or disconnecting wire Check the winding resistance of Fan motor Change Fan motor and check if the error reoccurs on a test run After fixing the problem and for canceling the Error Error Reset F3 40 will be required after power reset Check Point 3 Replace Dr...

Page 145: ... A Coil 1 EEV Error Trouble shooting 57 E9A 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Coil 1 Expansion valve 1 driver circuit open detected Check if the DC12V is on between the Pin No 1 of CN116 and Pin No 2 of CN132 GND Disconnect the wire of EEV1 when you check the output of EEV1 Check Point 5 Noise momentary open voltage drop Check i...

Page 146: ...A Coil 2 EEV Error Trouble shooting 58 E9A 2 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Coil 2 Expansion valve 2 driver circuit open detected Check if the DC12V is on between the Pin No 1 of CN117 and Pin No 2 of CN132 GND Disconnect the wire of EEV2 when you check the output of EEV2 Check Point 5 Noise momentary open voltage drop Check if...

Page 147: ... A Coil 3 EEV Error Trouble shooting 59 E9A 3 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Coil 3 Expansion valve 3 driver circuit open detected Check if the DC12V is on between the Pin No 1 of CN160 and Pin No 2 of CN132 GND Disconnect the wire of EEV3 when you check the output of EEV3 Check Point 5 Noise momentary open voltage drop Check i...

Page 148: ... on displayed error code Indoor Unit No display Operation LED 9 times Flash Timer LED 15 timse Flash Filter LED Continuous Flash Outdoor Unit E 9 U 2 Only for master outdoor unit Error Code Trouble shooting 60 E9U 2 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Master Outdoor unit 9 U 2 Slave Outdoor unit and Service Tool indicate applicable Error code 04 72 ...

Page 149: ...ation Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E A 1 1 Error Code 9 U A 1 Check Point 1 Check if 3 way valve is open If the 3 way valve was closed open the 3 way valve and check operation OK 1 3 way valve not opened 2 EEV defective strainer clogged 3 Outdoor unit operation defective foreign matter on heat exchanger 4 Discharge temp s...

Page 150: ...eration Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E A 3 1 Error Code 9 U A 3 Check Point 1 Check if 3 way valve is open If the 3 way valve was closed open the 3 way valve and check operation OK 1 3 way valve not opened 2 EEV defective strainer clogged 3 Outdoor unit operation defective foreign matter on heat exchanger 4 Compressor 1 t...

Page 151: ... Check Point 5 Check the solenoid valve SV1 SV2 Check Point 3 Check the EEV strainer Solenoid valve operation check Refer to Service Parts Information 17 Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E A 4 1 Error Code 9 U A 4 OK OK OK OK OK OK Check Point 1 Check if 3 way valve is open If the 3 way valve was closed open the 3 way valve a...

Page 152: ...7 Check high pressure switch 1 Check Point 8 Check the refrigerant amount Refrigerant charged amount check Check Point 6 Check the solenoid valve SV1 SV2 Check Point 3 Check the EEV strainer Solenoid valve operation check Refer to Service Parts Information 17 OK OK OK OK OK OK Check Point 1 Check if 3 way valve is open If the 3 way valve was closed open the 3 way valve and check operation Check Po...

Page 153: ... clogging Indoor unit EEV operation check Strainer not clogged Check Point 4 Check the indoor unit EEV strainer clogging Suction pressure sensor characteristics check For the characteristics of the suction pressure sensor refer to Service Parts Information 22 Check Point 7 Check the suction pressure sensor Check Point 8 Check the refrigerant amount Leak check Check Point 6 Check the solenoid valve...

Page 154: ...Ex 1 gas temp sensor from PCB and check For the sensor characteristics refer to the Service Parts Information 24 OK Check Point 4 Check the EEV Check the condition of mounting of EEV1 coil Check the connector connection state of EEV1 EEV2 EEV3 coil OK Check Point 6 Replace 4 way valve1 1 Fully close the 3 way valve and the refrigerant is recovered 2 4 way valve1 is replaced 3 Perform vacuuming of ...

Page 155: ...x 2 gas temp sensor from PCB and check For the sensor characteristics refer to the Service Parts Information 24 OK Check Point 4 Check the EEV2 Check the condition of mounting of EEV2 coil Check the connector connection state of EEV1 EEV2 EEV3 coil OK Check Point 6 Replace 4 way valve2 1 Fully close the 3 way valve and the refrigerant is recovered 2 4 way valve2 is replaced 3 Perform vacuuming of ...

Page 156: ...eign matter check Ambient temperature not raised by effect of other heat sources Discharged air not sucked in Check Point 2 Check the foreign matter and ambient temperature of heat exchanger Indoor Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E A C 4 Error Code 9 U A C Caution By changing of DIP SW 4 2 to ON the Back up operation can start when...

Page 157: ...er setting mistake of outdoor unit 4 Connection of communication line between outdoor units defective 5 Noise 6 Main PCB defective 7 Inverter PCB defective 8 Transmission PCB defective Indoor Unit No Display Outdoor Unit Error Code No Display Trouble shooting 71 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause YES NO YES Check if ground is conne...

Page 158: ...connector Check Point 3 Short circuit check on AC circuit NG Short circuit on AC circuit Replace power supply PCB Check Resistor R101 Open Short circuit check Check Point 4 Resistor R101 Disconnect CN 4 DC power supply and check short circuit between the pin No 1 and the pin No 6 step by step 1 Disconnect EEV connector 2 Disconnect SP motor 3 Disconnect Wired Remote Controller 4 Disconnect Transmi...

Page 159: ...t NG Short circuit on AC circuit Disconnect AC power input wires and check short circuit Check Point 3 Short circuit check on AC circuit NG Short circuit on AC circuit Check Resistor R101 Open Short circuit check Check Point 5 Resistor R101 Check short circuit between Pin No 1 and Pin No 6 of CNB01 DC 13 5V circuit 1 Disconnect EEV connector 2 Disconnect SP motor 3 Disconnect Wired Remote Controll...

Page 160: ...eck the complete insulation of grounding Check the fuse on the Filter PCB Main OK Replace the fuse Recheck if the power supply terminals section is shorted Note Always check in the power off state NG NG Disconnect connecting cable of the Filter PCB Main and Main PCB and recheck if the power supply terminals section is not shorted Note Always check in the power off state OK NG Replace the Filter PC...

Page 161: ... there loose or removed communication line of Indoor Unit and Outdoor Unit Check Terminator DIP SW SET 5 is installed on Outdoor Main PCB Check loose or removed communication line between each Outdoor Unit Check loose Communication PCB of each Outdoor Unit OK OK OK Forecast of Cause 1 Setting Connection failure 2 Outside cause 3 Electrical Component defective Indoor Unit Check incorrect wiring bet...

Page 162: ...ied amount Check EEV Refer to the Service Parts Information Check Solenoid Valve Refer to the See Service Parts Information Check Compressor Refer to the See Service Parts Information Check Point 4 Check Indoor Outdoor Installation Condition Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referr...

Page 163: ...ion Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor Service Parts Information 2 3 OK OK Is Main Unit installed in stable condition Is the installation of Air suction grille and front panel normal In case of Duct type Is Static ...

Page 164: ... Check Float Switch Refer to Trouble Shooting 26 Is Fan rotating Check Fan Motor Service Parts Information 19 20 Is Drain Hose connection loose Is there a trap in Drain Hose Is Drain Hose clogged Is Main Unit installed in stable condition Is Main Unit broken or deformed at the time of transportation or maintenance OK OK OK Check Gas Pressure and correct it if there was a gas leak Is the filter clo...

Page 165: ...n Motor Disconnect the connector CN200 on the Power supply PCB and check the short circuit 1 DC12V line CN200 Pin 1 5 2 DC 5V Line CN200 Pin 1 3 3 DC 15V 1 Line CN500 Pin 3 4 4 DC 15V 2 Line CN530 Pin 3 4 If one of them is short circuit replace the Power supply PCB Check Point 9 Short circuit check on DC circuit Disconnect the CN10 EEV1 on the Main PCB and check short circuit on Main PCB CN 4 Pin ...

Page 166: ...as voltage drop or noise Instant voltage drop Check if there is any electric equipment with a large load within the same circuit Momentary power failure Check contact failure or leak current in power supply circuit Check if there is any equipment that causes harmonic wave near the power cable Neon light bulb or any electronic equipment whichcauses harmonic wave And check the complete insulation of...

Page 167: ... 2 Thermistordefective 3 Controller PCB defective Check Point 1 Check connection of Connector Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring OK Check Point 2 Remove connector and check sensor resistance value Check Point 3 Check voltage CN9 of Controller PCB DC5 0V If the...

Page 168: ...ion 2 Thermistordefective 3 Controller PCB defective Check Point 1 Check connection of Connector Check if connector is loose or removed Check erroneous connection Check if thermistor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring OK Check Point 2 Remove connector and check sensor resistance value Check Point 3 Check voltage CN9 of Controller PCB DC5 0V If ...

Page 169: ...ORMATION 19 20 If Fan motor is abnormal replace it Check Point 1 Check rotation of Fan 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 Point 3 Check ambient temp around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature co...

Page 170: ...nstallation manual 1 Wrong capacity setting 2 EEV2 coil lose connection 3 EEV2 wire s cut or pinched 4 Defective EEV2 coil 5 Controller PCB DC 12V output abnormal 6 Noise momentary open voltage drop Trouble shooting 85 E52 2 Indicate or Display Detective Actuators Detective details INDOOR UNIT Error Method Forecast of Cause Check if the DC12V is on between the pin No 1 of CN11 and Pin No 6 of CNB0...

Page 171: ...e The type of error cannot be checked at the DX KIT control unit Check Point 1 Check the wire connection of External input Error input Check wire btween the terminal Error input signal of DX KIT and the peripheral device if it is not short circuit If the connecting wire has the shorcircuit replace the wire Indoor Unit Operation LED 13 times Flash Timer LED 6 times Flash Filter LED Continuous Flash...

Page 172: ...it on the terminal ON OFF SIGNAL OUTPUT 04 96 Short circuit Refer to the service manual for the peripheral device and check the trouble shooting tips Check Point 3 Operation signal output Open circuit Check power input CN800 Pin1 Pin2 OK DC12V Make sure that the operation command ON signal is transfering from the controller to the DX Kit controller If the ON singal was OK Replace the Relay PCB Che...

Page 173: ...nual for the peripheral device and check the trouble shooting tips Check Point 3 Operation signal output Check circuit on the terminal FAN SIGNAL OUTPUT Check Point 4 FAN SIGNAL output Open circuit Open circuit Check power input CN800 Pin1 Pin2 OK DC12V Make sure that the operation command ON signal is transfering from the controller to the DX Kit controller If the ON singal was OK Replace the Rel...

Page 174: ...CN10_Pin No 1 Pin No 6 Pin No 1 Pin No 4 Pin No 2 Pin No 3 Pin No 2 Pin No 5 EEV2 CN11_Pin No 1 Pin No 6 Pin No 1 Pin No 4 Pin No 2 Pin No 3 Pin No 2 Pin No 5 Check EEV initialisation movment by the power reset of DX Kit Check refrigerant flowing by measuring the temperature of pipe inlet and pipe outlet If the resistance of EEV coil was not correct replace the EEV unit If the DC12V did not appear...

Page 175: ...armonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Disconnect the CN 102 on the Power supply PCB Check voltage CN102 output voltage Pin No 1 Pin No 6 DC12V Pin No 2 Pin No 6 DC 5V 04 99 NG Replace the Power supply PCB Check Point 3 Output voltage on the power supply PCB Disconnect the CN 801 and the power input co...

Page 176: ...vice tool Check missing indoor unit or outdoor unit by using Address checker function of Service tool 3 Check terminal resistance value 53 Ohm 5 Line Resistance on the terminal board one by one Terminal Resistance is located on the Outdoor unit PCB activated SET 5 4 ON Refer to the wiring diagram of Networlk cable To other refrigerant circuit Outdoor unit A Measurement Terminal Resistance A Measur...

Page 177: ...e operating method of replacing compressor while the system is running Compressor can be replaced without stopping the system Details In backup operation cooling and heating capacity is decreased by the capacity of the separated outdoor unit The work procedure is as follows Change the setting of the DIP SW 3 1 3 2 Outdoor unit address setting of the slave unit 1 from slave unit 1 to Master unit Ch...

Page 178: ...unit 4 Set up the slave unit 2 as Slave unit 1 6 Turn on the units except the broken slave unit and wait for more than 30 seconds Do not turn on the broken slave unit 7 It is ready for Backup operation Start operation as usual Change the DIP SW 3 3 3 4 Number of slave units connected of the master unit from ON OFF two units to OFF ON one unit Change the DIP SW 3 1 3 2 Outdoor unit address setting ...

Page 179: ...thin 180 minutes the system stops permanently 2 On Heating operation EEV1 opens at 480 pulse fully open EEV2 opens at 480 pulse fully open Suction superheat is too high when the condition is following TH9 Th7 TH10 TH8 TH2 TH3 LPS Low pressure sensor detection value EEV1 Expansion valve 1 EEV2 Expansion valve 2 TH2 Outdoor temperature sensor detection value TH3 Suction temperature sensor detection ...

Page 180: ...g of repaired outdoor unit thoroughly and add the refrigerant with the recovered amount 2 Refrigerant charging after the compressor replacement Connect the high pressure service port of the broken master unit and the low pressure pipe of the broken master unit by pressure gauge Refrigerant release from the heat exchanger of the broken master unit Refrigerant is removed until refrigerant shortage i...

Page 181: ...mpression part broken or valve defective In case of inverter compressor check Filter PCB Inverter PCB connection of Compressor and winding resistance Refer to the next page If there is no failure the defect of Compressor is considered Locked compressor due to clogged dirt or less oil Replace Compressor Check if refrigerant is leaking or amount of additional refrigerant is insufficient Repair the l...

Page 182: ...e replace Compressor W V U Resistance Value 20 C AJ 072 090 AJ 108 126 144 162 0 96 0 57 Attention If Check 1 2 are normal make sure the following points 1 Check AC voltage among each terminals from filter PCB INV to Diode Bridge AC208 230V voltage among L1 L2 and L3 If it does not appear check the power supply terminal 2 Check Voltage from Main PCB to Inverter PCB DC16 0 20 0V between terminals o...

Page 183: ...ure Check Main PCB 3 NO NO Check Main PCB 2 YES 7 Disconnect the wires of the pressure sensors High pressure Low pressure connected to the connector of the Main PCB 8 Is there a short between pins 1 3 of the Main PCB side connector 9 Is there a short between pins 1 6 of CN161 Replace Main PCB YES Replace Main PCB YES NO NO NO NO Check Main PCB 4 10 Disconnect the Main PCB side connector of the con...

Page 184: ... Is there a short between Inverter PCB side connector pins 1 2 NO Inverter PCB side short Replace Inverter PCB Filter PCB INV side short Replace Filter PCB INV YES Check Inverter PCB 3 9 Disconnect the connection wires 3 pin connector between the Inverter PCB Filter PCB INV 10 Is there a short between Inverter PCB side connector pins 1 3 and Filter PCB INV side connector pins 1 3 Turn on the power...

Page 185: ...onnection wires disconnected up to 1 6 to their original places 8 Turn on the AC power If the LED of the Main PCB shows Fan error replaces the Fan driver PCB Check Fan Driver PCB 3 NO YES Replace Fan driver PCB 3 Disconnect the wires of the Fan motor connected to the connector of the Fan driver PCB 4 Is there a short between pins 4 5 of the Fan driver PCB side CN702 connector Check Fan Driver PCB ...

Page 186: ...tance of Filter PCB INV by following procedure 1 Turn OFF the Outdoor unit s power supply 2 Disconnect the connection wires between the Filter PCB INV Inverter PCB 3 Measure the resistance value Good 300 Ohm 20 240 360 Ohm 04 110 CN522 Pin 1 3 Filter PCB INV K11CE 1100HUE FL0 ...

Page 187: ...ween the following terminals Red wire P screw terminals U V W White wire N screw terminals U V W Set the tester to the Diode mode and measure the voltage value between the following terminals Judge the result of as follows All 6 points several M or greater Normal 1 or more points several k to short Defective All 6 points several 0 3V to 0 7V Normal 1 or more points under 0 1V or over load Defectiv...

Page 188: ...ve Tester side red Tester side black Tester side red Tester side black Pin 1 Pin 2 Pin 3 Pin 5 Pin 4 Pin 2 Pin 1 Pin 3 Set the tester to the Diode mode and measure the voltage value between the following terminals All 6 points over load Normal 1 or more points except over load Defective No fissures breaks damage etc at body and terminal section Is the rear of the body coated with silicone grease A...

Page 189: ...2 Electric check Set the tester to the Resistance mode and check for open short between both ends of the reactor wire or connector Judge the result of as follows Short Normal Open Abnormal open No fissures breaks damage etc at the body and winding section terminals section 04 113 ...

Page 190: ...s 5 6 5 Other than the above Normal Deteriorated defective No fissures breaks damage etc at the body and terminals section 1 Surge prevention resistor connected to magnetic contactor Set the tester to the Resistance mode and measure the resistance value between the terminals No polarity Judge the result of as follows 2 Discharge resistor connected to electrolytic capacitor 04 114 33 k 5 Other than...

Page 191: ...ric check Between R to U Between S to V Between T to W Set the tester to the Resistance mode and check for open short between the following terminals No polarity Open Normal Short Abnormal contacts fused No fissures breaks damage etc at the body and terminals section Are there no abnormalities at threaded parts Stripped threads deformation damage etc R U V W S T Check Point 1 Appearance check Chec...

Page 192: ... 3 Check Noise at start up Turn on Power and check operation noise If an abnormal noise does not show replace Controller PCB DC White Red Orange Red Yellow Brown Blue Brown CN10 CN10 Check Point 5 Check Opening and Closing Operation of Valve When Valve is closed it has a temp difference between Inlet and Outlet Check Point 6 Check Strainer Strainer normally does not have temperature difference bet...

Page 193: ...t as shown in 1 but if there is a difference as shown in 2 there is a possibility of inside clogged In this case replace Strainer Check Point 5 Check Opening and Closing Operation of Valve When EEV1 is closed it has no temp difference between Inlet and Outlet If it is open it has a temp difference between Inlet and Outlet Outlet temp is near Low pressure saturated temp DC Yellow Red Orange Red Blu...

Page 194: ...nce between inlet and outlet as shown in 1 but if there is a difference as shown in 2 there is a possibility of inside clogged In this case replace Strainer Check Point 5 Check Opening and Closing Operation of Valve When EEV2 is closed it has no temp difference between Inlet and Outlet If it is open it has a temp difference between Inlet and Outlet Outlet temp is near Low pressure saturated temp D...

Page 195: ...temperature difference between inlet and outlet as shown in 1 but if there is a difference as shown in 2 there is a possibility of inside clogged In this case replace Strainer Check Point 5 Check Opening and Closing Operation of Valve When EEV3 is closed it has no temp difference between Inlet and Outlet If it is open it has a temp difference between Inlet and Outlet Outlet temp is near Low pressu...

Page 196: ...n Defrost Oil recovery Start up Pipe In TEMP Hi Pipe Out TEMP Hi Check Point 4 1 Check opening closing operation of SV1 SV2 Depending on either during operation or protection control check if Valve is operating normally When Valve opens Inlet and Outlet temperature is raised If the valve closes by removing the connector of the valve which does not close it is considered to be Main PCB failure Repl...

Page 197: ... temp 46 4 F 8 C Check Point 4 2 Check operation of SV3 Check the operation noise when the connector of SV3 is removed When SV3 is open The sound of operation noise is heard Normal The sound of operation noise is not heard Replace SV3 When SV3 is closed The sound of operation noise is heard Replace Main PCB The sound of operation noise is not heard Normal 04 121 Pipe In Pipe Out Pipe In Pipe Out O...

Page 198: ... Check Voltage of Solenoid Coil If CN105 CN156 158 of Control PCB dose not Show AC208 230V during Heating operation Compressor is in operation replace Main PCB ON OFF CN105 4WV1 BLUE SOLENOID COIL 4WV1 BLUE 1 1 2 2 Check Point 1 Check Circuit connection Check Point 2 Check Solenoid Coil SERVICE PARTS INFORMATION 18 4 WAY VALVE 1 2 3 Remove CN105 CN156 158 from PCB and check the resistance value of...

Page 199: ...ed BLUE Low RED Hi BLACK WHITE 145 C at 20 C Violet Blue Check Point ARXC72GATH High Static Pressure Duct Type Check each winding resistance of the motor If Resistance value is abnormal replace motor Red Pink Pink Violet Red Black White Red Lead wire 5 25 7 5 02 7 1 86 7 0 94 7 0 94 7 Resistance value AC Thermal protector Pr VIOLET Lo PINK Med BLUE S Lo RED Hi BLACK WHITE 145 C at 20 C Violet Blue...

Page 200: ...Check Point 1 Check rotation of Fan Indoor unit fan motor DC motor 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 Point 2 Check resistance of Indoor Fan Motor Refer to below Circuit test Vm and GND terminal Vm DC voltage GND Earth terminal If they are short circuited below 300 k replace Indoor fan motor...

Page 201: ...E SENSOR LOW BLACK 2 2 RED PS MPa Output V 0 00 0 10 0 20 0 30 0 40 0 50 0 70 0 80 0 90 1 00 1 20 1 40 1 60 1 80 2 00 Output V 0 50 0 58 0 66 0 74 0 82 0 90 1 06 1 14 1 22 1 30 1 46 1 62 1 78 1 94 2 10 2 20 2 40 2 60 2 80 3 00 3 20 3 40 3 60 3 80 4 00 4 20 4 40 4 60 4 80 5 00 2 26 2 42 2 58 2 74 2 90 3 06 3 22 3 38 3 54 3 70 3 86 4 02 4 18 4 34 4 50 MPa Output V 0 00 0 10 0 20 0 30 0 40 0 50 0 70 ...

Page 202: ...H1 Comp 1 temp TH Outdoor temp TH Heat sink temp TH Suction temp TH Liquid temp TH 1 Liquid temp TH 2 Sub cool heat ex outlet TH Heat ex 1 gas TH Heat ex 2 gas TH Heat ex 1 liquid TH Heat ex 2 liquid TH 04 126 168 6 0 19 129 8 0 24 100 9 0 31 79 1 0 39 62 5 0 48 49 8 0 59 40 0 0 71 26 3 1 01 17 8 1 36 12 3 1 75 8 7 2 17 6 3 2 57 4 6 2 96 3 4 3 30 2 6 3 60 2 0 3 85 27 8 1 67 21 0 2 00 16 1 2 33 12 ...

Page 203: ...5 APPENDING DATA UNIT ...

Page 204: ...AN21 FAN21 Indoor unit1 Outdoor unit HEX21 HEX21 Indoor unit2 GAS LINE TH21 TH22 TH24 TH24 TH21 TH22 Check valve Capillary Strainer 3 way valve Service port Pressure regulation valve SCHEX CMP INV ACM LPS HEX1 TH11 TH1 HPSW1 SV2 SV1 SV3 TH3 TH2 EEV2 EEV1 TH4 EEV3 TH6 TH5 TH7 TH8 TH9 TH10 4WV1 CMP ACM OS HPS FAN1 4WV3 4WV2 HEX2 ...

Page 205: ... Solenoid valve 3 Marking color TH1 Discharge temperature thermistor 1 BLUE TH2 Outdoor temperature thermistor TH3 Suction temperature thermistor RED TH4 Liquid temperature thermistor 1 WHITE TH5 Liquid temperature thermistor 2 BROWN TH6 Sub cool heat exchanger outlet thermistor GREEN TH7 Heat exchanger 1 gas thermistor BLACK TH8 Heat exchanger 2 gas thermistor YELLOW TH9 Heat exchanger 1 liquid t...

Page 206: ...5 2 WIRING DIAGRAM 5 2 1 Indoor Unit 05 03 COMPACT CASSETTE TYPE MODELS AUXB04GALH AUXB07GA H AUXB09GA H AUXB12GA H AUXB14GA H AUXB18GA H AUXB24GA H ...

Page 207: ...05 04 CASSETTE TYPE MODELS AUXD18GA H AUXD24GA H AUXA18GALH AUXA24GALH AUXA30GA H AUXA36GA H AUXA45GA H AUXA54GA H ...

Page 208: ...05 05 LOW STATIC PRESSURE DUCT CONCEALED FLOOR TYPE MODEL ARXB07GALH ARXB09GALH ARXB12GALH ARXB14GALH ARXB18GALH ...

Page 209: ...05 06 SLIM DUCT SLIM CONCEALED FLOOR TYPE MODELS ARXD04GALH ARXD07GA H ARXD09GA H ARXD12GA H ARXD14GA H ARXD18GA H ARXD24GA H ...

Page 210: ...05 07 LOW STATIC PRESSURE DUCT TYPE MODEL ARXB24GALH ARXB30GALH ARXB36GALH MODEL ARXB45GALH ...

Page 211: ...05 08 MEDIUM STATIC PRESSURE DUCT TYPE MODELS ARXA24GALH ARXA30GALH ARXA36GALH ARXA45GALH MODELS ARXA24GB H ARXA30GB H ARXA36GB H ARXA45GB H ...

Page 212: ...05 09 HIGH STATIC PRESSURE DUCT TYPE MODELS ARXC36GATH ARXC45GATH ARXC60GATH MODELS ARXC72GATH ARXC90GATH ...

Page 213: ...05 10 MODEL ARXC36GBTH MODELS ARXC72GBTH ARXC90GBTH ...

Page 214: ...FLOOR CEILING TYPE MODELS AB A12GATH AB A14GATH AB A18GATH AB A24GATH 05 11 ...

Page 215: ...CEILING TYPE MODELS AB A30GATH AB A36GATH AB A45GATH AB A54GATH 05 12 ...

Page 216: ...05 13 WALL MOUNTED TYPE EEV external model MODELS AS E04GACH AS E07GACH AS E09GACH AS E12GACH AS E14GACH ...

Page 217: ...05 14 WALL MOUNTED TYPE MODELS AS A04GACH AS A07GA H AS A09GA H AS A12GA H AS A14GA H ...

Page 218: ...05 15 MODELS AS A18GA H AS A24GA H AS A30GA H ...

Page 219: ...05 16 MODEL ARXH054GTAH OUTDOOR AIR UNIT MODEL ARXH072GTAH ...

Page 220: ...05 17 MODEL ARXH096GTAH ...

Page 221: ...MODELS AJ 072LALBH AJ 090LALBH AJ 072LATBH AJ 090LATBH 05 18 5 2 2 Outdoor Unit ...

Page 222: ...MODELS AJ 108LALBH AJ 126LALBH AJ 144LALBH AJ 162LALBH AJ 108LATBH AJ 126LATBH AJ 144LATBH AJ 162LATBH 05 19 ...

Page 223: ...1 601 1 647 1 693 1 740 1 788 1 837 1 887 1 938 1 990 2 043 2 097 2 152 2 208 2 265 2 323 2 382 2 442 2 503 2 565 2 629 2 693 2 759 2 826 2 894 2 963 3 034 3 106 3 178 3 253 3 328 3 405 3 483 3 562 3 643 3 725 3 808 3 893 3 979 4 066 4 155 Saturation pressure Mpa Temp C Saturated liquid Saturated gas 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8...

Page 224: ...2 2 5 435 3 0 507 3 5 580 4 0 652 4 5 22 30 4 20 14 10 32 0 50 10 68 20 86 30 104 40 122 50 140 60 Saturated liquid pressure PSI MPa Gauge pressure Saturated liquid temperature F C 5 3 3 Temperature and pressure of refrigerant Graph 05 21 ...

Page 225: ...6 DISASSEMBLY PROCESS ...

Page 226: ......

Page 227: ...ition of spacers on the Main PCB Do not attach the transmission PCB wrong position When the connection of transmission PCB and the Main PCB was wrong the both of PCB might be broken after power supply on 3 After adjusting the position of PCB attach the PCB to the Main PCB Correct position Incorrect position 2 Indoor unit Transmisson PCB install SET1 1 SET1 2 SET1 3 SET1 4 SET2 1 Indoor unit capaci...

Page 228: ...ric parts for 10 minutes due to the risk of electric shock 1 Appearance 2 PANEL TOP removal 3 CONTROL BOX COVER removal screws screws Hook 3 places Remove the 4 mounting screws Remove the PANEL TOP by sliding toward Remove the 4 mounting screws Remove the CONTROL BOX COVER by sliding toward 06 02 6 2 Outdoor Unit ...

Page 229: ...r cement Rush current protection Magnetic Relay Rush current protection Resistor cement Discharge from capacitor Diode Bridge Coil Reactor Magnetic Relay Rush current protection Resistor cement Discharge from capacitor Communication PCB Capacitor Terminal Terminal Terminal Fan driver PCB Inverter PCB Main PCB Communication PCB 06 03 Reference Data Model AJY108 126 144 162LALBH Fan driver PCB Inver...

Page 230: ...orque 2 4 0 1N m 2 4 0 1N m 0 5 0 6N m 2 5 0 2N m 1 6 2 0N m 5 0 7 0N m DANGER There is danger to which a fire and the capacitor explosion break out in the market if it does not assemble it with a regulated torque 06 04 Reference Data Model AJY108 126 144 162LALBH 5 0 7 0N m 1 6 2 0N m 2 4 0 1N m 2 4 0 1N m 2 4 0 1N m 0 5 0 6N m 2 4 0 1N m 1 5 0 1N m 2 4 0 1N m ...

Page 231: ...se the electricity charge calculation function as system controller or touch panel controller If the model name is not written the trouble such as the refrigerant circuit diagram is not displayed or the electricity charge calculation is not done accurately might occur Therefore please register the model name to each controller who uses it when you exchange Main PCB by the repair 1 Model name regis...

Page 232: ... Note the tightening torque at the installation Tightening torque is as follows Temporary tightening 0 3 0 2N m Final tightening 2 7 0 2N m 7 Inverter PCB removal Compound 06 06 Inverter PCB Screws For INV comp Screws For IPM IPM Screws For Magnetic relay Spacers 5 places Screws For capacitor Spread the heat dissipation compound on the other side of IPM when you exchange Inverter PCB by the repair...

Page 233: ...ghtening torque is as follows Temporary tightening 0 3 0 1N m Final tightening 1 5 0 1N m Compound 06 07 Inverter PCB Screws For Capacitor Screws For CT PCB Screws For IPM IPM Spacers 4 places Spread the heat dissipation compound on the other side of IPM when you exchange Inverter PCB by the repair AJ 108 126 144 162LALBH AJ 108 126 144 162LATBH Remove the mounting screw and code Screws For Magnet...

Page 234: ...n driver PCB removal 06 08 Fan driver PCB Screws For IPM Spacers Spacers IPM Heat sink M AJY072 090 Heat sink L AJY108 126 144 162 Heat sink K Spread the heat dissipation compound on the other side of IPM when you exchange Fan driver PCB by the repair Spread the heat dissipation compound without a gap between the Heat sink K and Heat sink M or L HEAT SINKER 20g 0000036795 Service Parts No Parts Na...

Page 235: ...Loose or remove the cable ties 3 places Remove the locking stopper of edging saddle 3 places Remove the wires from edging saddle 3 places Remove the Wire plate by sliding rightward Remove the PANEL BTM by sliding toward 9 PANEL BTM removal 10 Control Box open Screws 7 places Screws 2 places Screws 6 places Handle Hook 3 places ...

Page 236: ...RE SENSOR with wrench There are two sensors High and Low pressure Remove the heat insulation Remove the thermo spring and thermistor 06 10 14 PRESSURE SENSORS removal 13 EEV COILS removal Remove the EEV coil by hand There are two coils Note the tightening torque at the installation Tightening torque is 15 1 5N m Thermo spring High pressure sensor Low pressure sensor ...

Page 237: ...ounting screws Remove the 2 mounting screws Remove the Comp box cover by sliding leftward and toward Cut the cable tie Remove the Fan Guard Remove the nut Note the tightening torque at the installation Tightening torque is from 15 to 20N m Note at the installation Insert propeller fan and motor shaft reference D cutting position Loose Remove ...

Page 238: ...from the service port Start the following work after completely collecting the refrigerant Do not reuse the refrigerant that has been collected Remove the 4 mounting screws Remove the Center beam Remove the 4 mounting screws Remove the Comp Box R by sliding toward Remove the Comp Box Top by sliding toward Remove the Comp Box L by sliding toward Remove the 4 mounting screws Remove the 7 mounting sc...

Page 239: ...mp cover Outside Color Green Comp cover Accumulator Color white Note Compressor cover Top consists of 2 parts The inside of the Comp cover is white and the outside of Comp cover is green Remove the Compressor cover Outside Compressor cover Accumulator and Compressor cover Body Comp cover Body Color White Note the tightening torque at the installation Tightening torque is 2 0 2 5N m Note the tighte...

Page 240: ...me with the fire retardant board when the flame seems to hit the following parts directly 5 Do not allow moisture or debris to get inside refrigerant pipes during work 6 When brazing be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale Part name Allowable temperature Precautions in work Remove the coil before brazing And install the coil after brazing Remov...

Page 241: ...004 Fujitsu General Limited All rights reserved TM is a worldwide trademark of FUJITSU GENERAL LIMITED Product specifications are subject to change without notice 3 3 17 Suenaga Takatsu ku Kawasaki 213 8502 Japan ...

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