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Fujitsu Airstage UTP-RU01AH, Service Manual

The Fujitsu Airstage UTP-RU01AH Service Manual is a comprehensive guide that allows users to conveniently troubleshoot and maintain their Airstage unit. Download this invaluable manual for free from our website and unlock all the essential information you need to ensure optimal performance and longevity for your Fujitsu Airstage.

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Discharge Tempreture 1 Abnormal

<Cooling/ Cooling main operation>

OK

OK

OK

OK

OK

<Heating/ Heating main operation>

Discharge temp. sensor 1

"Protection stop by "discharge temp. 1     115°C (239°F) during compressor 1
 operation"" generated 2 times within 40 minutes.

Check Point 1 : Check if 3-way valve is open.

Discharger temp. sensor 1 characteristics check 
(Check by disconnecting sensor from PCB.)

* For the characteristics of the sensor, refer to the "Service Parts Information 25".

Check Point 4 : Check the discharge temp. sensor 1

EEV (EEV1, EEV2, EEV3, indoor unit EEV) open?
Strainer clogging check (before and after EEV, ACM 
oil return)
Refer to "Service Parts Information 15, 16, 17".

Check Point 3 : Check the outdoor unit fan,heat exchanger

Check for foreign matter at heat exchanger
Check if fan can be rotated by hand.
Motor check

Check Point 2 : Check the EEV, strainer

Check Point 5 : Check the refrigerant amount

Leak check

EEV (EEV1, EEV2, EEV3) open?
Strainer clogging check (before and after EEV, ACM 
oil return)
Refer to "Service Parts Information 15, 16, 17".

Check Point 2 : Check the EEV, strainer

If the 3-way valve was closed, open the 
3-way valve and check operation.

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. sensor 1 defective
5. Insufficient refrigerant

Trouble shooting  61                 EA1. 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 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 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.

04-70

Summary of Contents for Airstage UTP-RU01AH

Page 1: ...SERVICE MANUAL 208 230V 60Hz ...

Page 2: ...8 4 Low noise mode 2 6 1 Cooling Cooling main operation 02 09 2 6 2 Heating Heating main operation 1 2 5 Transmission wire installation inspection 01 06 1 2 6 Piping installation inspection 01 09 1 2 7 Refrigerant charge amount inspection 01 11 1 2 8 3 way valve opening inspection 01 11 1 3 1 Power source check 1 3 2 Error indication check 1 3 4 Transmission line connection check 01 12 01 12 01 14...

Page 3: ...7 RB UNIT COMPONENT 03 13 3 7 1 Position of Solenoid coil 03 13 3 7 2 Position of Solenoid valve 03 13 3 7 3 PCBs layout 03 14 2 9 PROTECTIVE FUNCTION 02 16 02 16 2 9 1 Discharge temperature protection 02 18 2 9 2 High pressure protection 02 20 2 9 3 Low pressure protection 02 21 2 9 4 Heatsink temperature protection 02 21 2 9 5 Compressor temperature protection 02 21 2 9 6 O U Heat Ex 1 2 Gas Tem...

Page 4: ...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 RB unit Abnormal 04 89 4 5 SERVICE PARTS INFORMATION 04 98 4 2 1 Error code Display 04 03 4 2 6 Trouble shooting index No Error code 04 07 4 2 9 Trouble shooting with Error code 04 10 4 2 10 Trouble shooting No Error code 04 81...

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

Page 6: ......

Page 7: ...n of water 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 ti...

Page 8: ...igerant 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 neces...

Page 9: ...upply 1 Circuit Breaker Size A Check Leakage current vs number of IUs RB units 20A breaker for one circuit Leakage current as follows No of units vs leakage current 30mA for number of unit 44 units 100mA for 45 numberr of units 128 units Units means Indoor unit RB unit Note MCA for total connected units IU RB less than 15A for 20A breaker capacity MCA means minimum circuit ampere Circuit number 1 ...

Page 10: ... 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 11: ...nnected IUs Total capacity kW of the connected IUs RB Add Ref Add RB unit single type Indoor units Branch Total capacity UTP RU01AH Maximum 3 units 8 0 kW or less UTP RU01BH Maximum 8 units 18 0 kW or less UTP RU01CH 28 0 kW or less RB unit multi type Number of RB units Indoor unit Branch Capacity Each Branch Total UTP RU04BH 1 unit Maximum 8 units Up to 18 0kW Up to 56 0kW 2 units series 1 2 4 RB...

Page 12: ... unit IU Must be properly connected Between RB unit IU RB unit Tterminal OUT U X1 X2 Earth IU Terminal IN U X1 X2 Earth Yes No For Heat Recovery IU Between RB unit IU Must be properly connected Between RB unit IU RB unit Tterminal IN U X1 X2 Earth IU Terminal IN U X1 X2 Earth Yes No Between RB unit Master OU Must be properly connected Between RB unit Master OU RB unit Terminal OUT U X1 X2 Earth Ma...

Page 13: ...ke a loop configuration Looped Notlooped No of network segment 1 No of network segment 41 1 Create one Network Segment based on the following conditions Condition 1 if the transmission line length 1640ft 500m Condition 2 if a total number of connected units 64 connected units 2 2 connected units mean a total of Indoor Units Master Outdoor Units RB Units 3 TPC Units System Controller Units Network ...

Page 14: ...units OR One per every master OU if totalnumber of connected Indoor Units 320 Number of Signal Amplifier ________ No of Network Convertor 100 One for each separate 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 pe...

Page 15: ... Between RB unit and IU 16ft 5m feet Check Item Check contents Judgement Present Status Ref circuit name ____________________________________ Ref address _____ 00 99 For single type multi type RB Units Piping layout Between RB IU Existence of additional RB in between RB branch port and indoor unit is prohibited Correct Not correct For multi type RB Unit Branch port piping layout RB branch port vs ...

Page 16: ...ot correct Keep free branch port within 2 or less per refrigerant cycle Correct Not correct One refrigeration cycle 1st not used port 2nd not used port 3rd not used port Check Item Check contents Judgement Present Status Ref circuit name _______________________________________ Ref address For multi type RB Unit RB series connection Maximum two RB units for multi type in series is allowable Correct...

Page 17: ...s Note In the refrigerant system overall refrigerant amount 77 16 lbs 35 kg for 1 OU 154 3 lb 70kg for 2 OUs and 231 5 lbs 105 kg for 3 OUs Overall refrigerant amount kg in the refrigerant system Factory charged refrigerant lb kg for OU Total additional amount of charged refrigerant lb kg Additional charged refrigerant for OU Additional charged refrigerant for connecting pipe Factory charged refri...

Page 18: ...udgment Language selection screen will appear Yes No Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______ RB address ________ Yes No IU address _______...

Page 19: ...IU address _____________ Yes No RB address _______ IU address _____________ Yes No Note LED2 Red of RB unit must not be ON Check Contents Check items Checking method Judgement Present Status Ref circuit Name _________________ Ref address ________ select from 00 to 99 Design value Check status Installed units and their addresses check Number of IU IU address Checked by Service Tool Number of units ...

Page 20: ...__ RB add ____ Yes No Yes No IU add _____ RB add ____ 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 heat in order of RB group number by using Control function of...

Page 21: ...ol 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 IU side should be 7 2 F 12 6 F RB group SV SB...

Page 22: ...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 23: ...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 24: ...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 25: ... 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 19 ...

Page 26: ... 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 27: ...rmation on Thermistor 5 35 Information on Thermistor 6 36 Information on Thermistor 7 37 Information on Thermistor 8 38 Information on Thermistor 9 39 Information on Thermistor 10 Discharge temperature sensor 1 Outdoor temperature sensor Suction temperature sensor Liquid temperature sensor 1 Liquid temperature sensor 2 Sub cool H Ex outlet sensor Heat exchanger 1 gas sensor1 Heat exchanger 2 gas s...

Page 28: ...00 01 24 High static pressure mode 25 26 27 Forbidden Standard High static pressure 1 equivalent to 0 12 in WG 30Pa High static pressure 2 equivalent to 0 32 in WG 80Pa Forbidden 00 01 00 01 28 29 Change of unit Temperature Change of unit Pressure Celsius C Fahrenheit F MPa psi 00 01 02 03 04 Change of 30 Energy saving level setting function 2 Level 1 stop Level 2 operated at 40 capacity Level 3 o...

Page 29: ...ectricity meter No setting 2 Set the hundreds digit of the No of the electricity meter connected to CN135 72 Electricity meter pulse setting 1 Set the ones digit and tens digit of the No of the electricity meter pulse setting connected to CN135 73 Electricity meter pulse setting 2 Set the hundreds digit and thousands digit of the electricity meter pulse setting connected to CN135 00 99 4 Setting n...

Page 30: ...e repair is completed Please operate the switch after power off or power on the outdoor unit Specialty function Forced Central control function forced release When the centralized control device failure and the centralized control setting cannot be released this function is used All the limitations set with the centralized control device are 1 time ago Newest When the error occurred the error code...

Page 31: ...ting 2 3 Duct middle pressure type The Range of static pressure is different from one model to other Static Pressure setting 4 5 Duct high pressure type The Range of static pressure is different from one model to other 04 05 06 07 08 09 10 11 12 13 14 31 SP mode 04 0 16 in WG 40 Pa SP mode 05 0 20 in WG 50 Pa SP mode 06 0 24 in WG 60 Pa SP mode 07 0 28 in WG 70 Pa SP mode 08 0 32 in WG 80 Pa SP mo...

Page 32: ...ed stop 60 Switching functions for external inputs and external outputs terminals 00 01 02 04 05 03 07 08 06 Mode 0 Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 Mode 6 Mode 7 Mode 8 61 Control switching of external heaters Except Compact wall mounted and Wall mounted 62 Operating temperature switching of external heaters Except Compact wall mounted and Wall mounted 00 01 02 04 00 03 02 03 04 05 01 Auxiliary...

Page 33: ...00 Start Stop 01 Emergency stop 47 Error report target 00 01 00 All 01 Display only for central remote control 02 Forced stop Start Stop by RC is restricted 60 61 62 Forbidden 63 Humidifier control 2 65 Threshold temperature setting for cool heat switch over 3 00 01 02 00 01 02 03 04 05 mode 00 mode 01 mode 02 mode 1 4 F 2 C mode 0 10 F 5 C mode 2 6 F 3 C mode 3 8 F 4 C mode 4 10 F 5 C mode 5 12 F...

Page 34: ...2 OUTDOOR UNIT OPERATION CONTROL ...

Page 35: ...mp Sensor Detects the temperature of refrigerant Heat Ex 2 liquid temp Sensor Detects the temperature of refrigerant 24 25 Pressure regulation valve Operates in regulated pressure 580 psi 4 00 MPa 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 Receiver tank Storage extra refrigerant 28 29 Liquid pipe tem...

Page 36: ...emperature of discharge airflow Discharge airflow temp thermistor Heat exchanger Operates as Condenser Evaporator 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 Thermo ...

Page 37: ...case heater 1 For Compressor Lower AC230V 35W Crank case heater 2 For Compressor Upper AC230V 35W Base heater Field supply AC230V The allowable current is 1A or less LON WORKS Inverter communication External input 1 CN131 Low noise mode operation External input 3 CN133 Outdoor unit operation peak control External input 4 CN134 Emergency stop operation Electricity meter puls input CN135 Non voltage...

Page 38: ...es as Evaporator After the mode was decided at the start up the operation mode of outdoor unit will be selected by based on the target pressure Ex When the refrigerant flow is required Ex When the refrigerant evaporation is required Ex When the refrigerant flow is not required Ex When the refrigerant condensation is required 2 4 1 Operation Stop Condition When cooling requirement capacity or heati...

Page 39: ...speed 90rps Outdoor temperature Cold Start start process Condition Outdoor temperature below 21 69 8 F and the system stopped for more than 1 hour rps sec 1 min or Max 15 min 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 in 30 rps to 90...

Page 40: ...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 make the condensation pressure of the indoor unit at the proper pressure on a variety of operations capacity of the compressor will be controlled by high pressure sensor Target low pressure and high pressure temperature depends on system capacity cap...

Page 41: ...rt and stop 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...

Page 42: ...ority in stop condition 880 500 300 0 Number of Condensor 1 2 3 4 5 6 Fan Speed rpm Target High pressure Operating High Pressure Target High pressure Operating High Pressure 2 Heating Heat Exchanger condition Evaporator 4WV ON state Fan speed Controlling range Maximum speed Heat Exchanger capacity shift controlling Use all of available HEXs Maximum capacity 880 920 0 Number of Evaporator Maximum n...

Page 43: ...nd heat sink temperature 167 F 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 follo...

Page 44: ...termittent 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 The fan speed during all heating is constant with Fan step 16 regardless of the outdoor air temperature 1 Heating Operation 2 Heating main Operation Operate at 500...

Page 45: ...urned On When operation stopped SCHEX FAN1 EEV1 EEV2 TH2 TH9 HEX1 TH7 TH10 HEX2 TH4 RCV TH5 TH6 TH8 4WV 1 4WV 2 EEV3 SV4 Cooling Cooling Main Heating Heating Main 0 pulses 0 500 pulses EEV 3 Liquid Pressue control TH4 HEX balance TH9 TH10 TH9 TH10 SH control TH7 TH8 LPS Target SH 8 F 4 C Protection TH1 LPS Contrl and detection The EEV controls the flow of refrigerant SH control TH6 LPS Target SH 8...

Page 46: ...essure saturaion temperature 10 F 5 C at all Outdoor units Or 6 minutes have elapsed since the start Operation Compressor Heat Ex 4WV FAN Heat Ex EEV SV1 SV2 All compressor operation Stop Keeps the operation mode Stops 0 pls Open All compressor start Condensor OFF Start Target high pressure control 480pls Close All compressor operation Stop Keeps the operation mode Stops 0 pls Open Preparation pro...

Page 47: ...mperature C 11 6 However 27 6 C to 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 35 6 F 2 C occured 20 times Defrosting sta...

Page 48: ... for refrigerant distribution to another heat exchanger STEP 2 STEP 3 HEX1 HEX1 HEX1 HEX2 HEX2 HEX2 HEX1 HEX1 HEX1 HEX2 HEX2 HEX2 HEX1 HEX1 HEX1 HEX2 HEX2 HEX2 HEX in defrosting HEX Defrost end Compressor Heat Ex 4WV FAN EEV1 EEV2 EEV3 SV1 SV2 All compressor operaiotn Stop Change Condensor OFF Stops 0 pls 0 pls Open Balancing All compressor start Cndensor OFF Stops EEV1 300 200 pls EEV2 480 330 pl...

Page 49: ... 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 Setting and corresponding operations 50rps 62rps 50rps 50rps 50rps 52rps Low noise mode and operation contents Capacity shortage Capacity shortage condition When the compressor capacity is not enough Compressor operates with uppe...

Page 50: ... fan step upper limit at the interval set by PUSH SW 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 00 01 02 03 F2 23 Interval setting setting standard setting setting setting This mode ends when the outdoor temperature becomes 44 6 F 7 C or more or operation starts When the Snow Falling protection is not neccesary change the Functio...

Page 51: ... Discharge temperature Above 225 F 107 C Below 221 F 105 F Outdoor unit rotation execution After rotation has been executed once it is executed every 15 minutes Discharge temperature Above 221 F 105 C Below 212 F 100 F Compressor speed decrease 6rps every 30 sec until it becomes the cancelation condition Discharge temperature Above 194 F 90 C Heating Heating main EEV s of operating indoor unit in ...

Page 52: ...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 176 194 203 212 216 221 239 S R DTP4 Indoor unit EEV opening controlling Note Target pressure controlling will be cancelled when the temperature is in the range of orang...

Page 53: ... 471 515 psi 3 24 3 54 MPa Pattern 2 Cooling Cooling Main Above 567psi 3 90MPa Heating Heating Main Above 480 524 psi 3 30 3 60 Mpa 25 sec elapsed and Below 464 508 psi 3 19 3 49 Mpa 25 sec elapsed and Below 550psi 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 L Chassis The value in when the compressor is oper...

Page 54: ...r Indication E A 41 HPP2 Pattern2 SV1 SV2 ON HPP2 Pattern1 SV2 ON Abnromal HP protection Pattern 2 Compressor rotation speed lessen 18 5 rps 15 0 rps 30sec L Chassis R S S 509psi 3 50Mpa 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 High pressure protection Summary 02 19 Note Target pressure controlling will be cancelled...

Page 55: ...Below 23psi 0 16MPa 3minutes elapsed and above 94psi 0 18MPa Compressor rotation speed lessen in the limited time until above 25psi 0 17Mpa Compressor rotation speed rise up prohibit Pattern 1 Below 7psi 0 05MPa or 15psi 0 10MPa for 10min 3minutes elapsed and Above 25psi 0 17Mpa Corresponding outdoor unit stops Pattern 2 Pattern 1 generated 5 times within 180 minutes Error reset push button SW exe...

Page 56: ...device Operation Cool Heat Display Compressor temperature protection stop Compressor temp sensor TH11 EA31 P4 2 9 5 Compressor temperature protection Start condition Release condition Pattern 1 Compressor temperature above 239 F 115 C 3 minutes have elapsed and Discharge temp below 176 F 80 C Corresponding outdoor unit stops Pattern 2 Pattern 1 generated 2 times within 40 minutes Error reset push ...

Page 57: ...n Detect device Operation Cool Heat Display 2 9 8 Compressor Frequency Maximum setting protection Start condition Release condition Filter PCB Current transformer Pattern 1 Current value more than 28 7A 6ton 8ton 35 5A 10ton Current value less than the start condition Compressor speed rise up prohibited Compressor Frequency Maximum setting protection Pattern 2 Current value more than 29 7A 6ton 8t...

Page 58: ...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 9 11 EEV Coil abnormal S...

Page 59: ...3 INDOOR UNIT OPERATION ...

Page 60: ......

Page 61: ...ion 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 5 seconds 2 The indoor fan will stop in 30 seconds when the refrigerant circulation stops 3 The indoor fan will stop immediately when th...

Page 62: ... drain pump control function Operates according to the AIR FLOW MODE setting and besides cold air prevention operation Pulse controlled by the temperature difference calculation and freeze prevention function Heat Pulse controlled by the tempe rature difference Connectable type Free Cool Heat Fix Cool Heat Only Cool Cool Dry Heat Auto Fan X X 1 2 RB I U 1 1 RB I U 1 2 8 RB I U 0 1 Each possible op...

Page 63: ... connectable type The purpose of the priority mode is to restrict operation commands heating cooling 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 ...

Page 64: ... OFF Electric expansion valve Drain pump Stop pulse Turns ON OFF by the drain pump control function Solenoid valve Closed Operates according to the HIGH MODE setting Heat Pulse controlled by the temperature difference Connectable type Free Cool Heat Fix Cool Heat Only Cool Cool Dry Heat Fan X X X X RB I U 1 1 RB I U 1 2 8 RB I U 0 1 Each possible operation mode in each connectable type is controll...

Page 65: ...for connectable type The purpose of the priority mode is to restrict operation commands heating cooling from the connected outdoor air 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 ...

Page 66: ...ed 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 stops or operation command other than auto changeover operation...

Page 67: ...it by wired remote controller 3 Judge cooling heating by the difference between the master outdoor air unit 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 NO Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than ...

Page 68: ...ERATION Yes NO NO NO Room temp Refrigerant circulation stopped AUTO CHANGEOVER operation COOLING ONLY TYPE TS Setting temperature Refrigerant circulation started NO Yes due to temp due to temp Judge cooling dry by the difference between the setting temperature and the room temperature In case of group connection of cooling only indoor unit the room temperature sensor in wired remote controller man...

Page 69: ...ommand other than auto changeover operation NO NO Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation YES YES Remote controller type UTY RNRU Remote sensor in use Prohibit the central function from the Central controller Reccomend Function available in follwing conmditions 1 2 of DB 3 0 F Room temp 1 2 of DB 3 0 F Room temp...

Page 70: ...e 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 Indoor fan 1 Ts Opening of EEV 100 0 Refrigerant flow ON OFF ON OFF Temperature TR 4Min 1Min 4Min 1Min 4Min 1Min Ts Corrected setting temperature TR Corrected room temperature Duration of cold air ...

Page 71: ...gher than the discharge airflow temperature otherwise the outdoor air unit will not start the heating operation 2 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 Thermistor ON 6 minutes Thermistor ON 6 minutes Therm...

Page 72: ...2 3 4 Press the VERTICAL AIRFLOW DIRECTION button The temperature display will change to the vertical airflow direction setting display Use the air 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 op...

Page 73: ...NTED TYPE and COMPACT WALL MOUNTED TYPE 1 3 4 5 2 03 08 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 74: ...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 09 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 75: ...ed by a start of indoor heat exchanger frost 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 sw...

Page 76: ...ain pump operates continuously for 3 minutes after the refrigerant circulation stopped 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 heat exchanger frost prevention operation 4 When the water level in the drain pan rises up and then the float switch functions Microcomputer st...

Page 77: ... or dry operation Heating operation Stop Indoor EEV Control pulse During the above operation a refrigerant noise might hear 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 mor...

Page 78: ...or unit and outdoor air unit is master indoor unit 23 F 5 C 64 F 18 C Suction airflow temperature rises Suction airflow temperature drops 68 F 20 C 50 F 10 C 41 F 5 C 19 F 7 C Forced thermostat off and Fan off Cooling operation Fan operation 64 F 18 C Suction airflow temperature rises Suction airflow temperature drops 68 F 20 C 50 F 10 C 41 F 5 C Forced thermostat off and Fan off Heating operation...

Page 79: ... Green Blue Black White Red Yellow Color of Connector Single type Multi type UTP RX04BH SV4 SV1 SV3 SV2 SV4 SV1 SV3 SV2 SV5 UTP RX01CH SV4 SV1 SV3 SV2 SV5 SV6 SV4 SV1 SV3 SV2 SV5 SV4 SV1 SV3 SV2 SV5 SV4 SV1 SV3 SV2 SV5 SV4 SV1 SV3 SV2 SV5 3 7 2 Position of Solenoid valve Liquid Line SVD1 SVS SVS SVS SVB2 SVB1 Indication on the Service Tool EEV SVD1 SVS SVB1 SVB2 HP LP Service Tool Display SV5 SV6 ...

Page 80: ...in Main PCB Pulse signal communication between Transmission PCB1 and Transmission PCB2 The transmission PCB1 and The transmission PCB2 are the same part Caution When the Main PCB is newly installed to the RB unit the address setting is required The RBG Address number has to be set as the same address of connecting indoor unit When a connection port of RB unit has a multi indoor unit connection the...

Page 81: ...uid Line Discharge Valve Suction Valve Equalization Valve Pressurization Equalization Valve Decompression Defrost Oil Recovery SV1 SVD1 SV4 6 SVS SV2 SVB2 SV3 SVB1 IU Freeze Prevention Close Open Close Open Close Close Close Open Function SV No Compressor Stop by protection Close Open Close Open Vacuuming Mode Close Close Close Open Open Open Open Open 3 7 5 Refrigerant Flow Cooling operation Heat...

Page 82: ......

Page 83: ...4 TROUBLE SHOOTING ...

Page 84: ......

Page 85: ...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 86: ...OFF 1 sec 1 sec 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 ...

Page 87: ...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 detects th...

Page 88: ... 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 89: ...ode Error code Ex Error code display ERROR CODE DISPLAY Model 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 Off Set Temp Fan Fri 10 00AM Status Menu Status Monitor Next Page Error Information Error Information ...

Page 90: ... 1 1 4 1 1 4 3 1 4 1 6 1 4 2 1 4 2 1 4 1 1 4 3 1 4 1 1 4 3 1 4 2 1 4 1 1 4 2 1 4 5 1 4 5 1 4 3 1 4 5 U 1 2 9 2 9 5 U 1 1 4 1 1 4 2 1 4 3 5 U 1 5 U 1 9 U 1 3 9 U 1 2 3 4 5 6 7 8 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 A 1 4 1 1 4 2 1 4 2 3 4 A 1 ...

Page 91: ... Error Contents Supecifics Display Target A Display Target B Display Target C Display Target D 5 U 1 J 1 1 4 2 6 Trouble 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 RB Unit No Power No operation Power is ON No Cooling Abnoemal Noise Water leaking Indoor Unit No Power Ou...

Page 92: ...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 93: ...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 94: ...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 95: ...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 OK Check Point 2 Check Remote and Controller PCB Check...

Page 96: ...en 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 conne...

Page 97: ...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 98: ... Check the indoor unit or RB 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...

Page 99: ...eceived communication Check Point 4 Check the Terminal resistor setting Terminal resistor setting check Check Point 6 Replace Main PCB outdoor unit indoor unit RB unit Check Point 5 Check the communication PCB outdoor unit indoor unit RB unit Change Main PCB and set up the original address Detective details 1 Noise momentary open voltage drop 2 Indoor unit or RB unit power off 3 Communication line...

Page 100: ... failure Check the Error indication of RB unit 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 or leak current in power supply circuit Check power supply for RB unit and Outdoor Unit as well Check if there is any equipment that...

Page 101: ...ain power 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 RB unit Change Main PCB and Communication PCB and set up the original address Forecast of Cause Check Point 1 Find the indoor uni...

Page 102: ...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 103: ...of Cause 1 Outside cause 2 Connection failure 3 Communication PCB failure 4 Controller PCB failure Check the Error indication of RB unit Refer to the Trouble shooting 69 70 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 or lea...

Page 104: ...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 105: ...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 Change controller PCB and check the Error after setting remote controller address Check if controll...

Page 106: ...r 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 units answers during auto address And when abnormal answer signal is input Trouble shooting 13 E28 1 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Check if communication line is correctly connected Aft...

Page 107: ...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 108: ...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 109: ...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 110: ...lation defect is found correct it by referring to Installation Manual OK Check power supply voltage AC208V 230V 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 AC 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 ...

Page 111: ...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 112: ...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 113: ...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 114: ...Sensor is either open or shorted replace it and reset 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 1 25 2 33 6 Resistance Value 25 20 15 10 5 0 Temperature 95 86 77 68 59 50 41 32 Temperat...

Page 115: ...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 of Controller PCB DC5 0V DC Corresponding connector If the voltage does not...

Page 116: ...eous connection Check if Sensor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring OK Sensor characteristics Rough value If Sensor is either open or shorted replace it and reset the power Check Point 2 Remove connector and check Sensor resistance value OK Check Point 3 Check voltage of Controller PCB DC5 0V DC Corresponding connector If the voltage does not ap...

Page 117: ...efer 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 Up...

Page 118: ...2 1 EEV1 coil lose connection 2 EEV1 wire s cut or pinched 3 Defective EEV1 coil 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 goo...

Page 119: ...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 120: ...r 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 Uni...

Page 121: ...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 122: ...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 123: ...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 124: ... 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 125: ...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 Sarvise 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 126: ...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 127: ...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 128: ...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 129: ...ltage 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 ...

Page 130: ...oor 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 ca...

Page 131: ...efer to the Service Parts Information 25 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 se...

Page 132: ...r Unit 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 ...

Page 133: ...er to the Service Parts Information 25 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 ...

Page 134: ... 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 exis...

Page 135: ... characteristics refer to the Service Parts Information 25 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 Ma...

Page 136: ...ash Filter 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 e...

Page 137: ...he Service Parts Information 25 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 a...

Page 138: ...eck voltage 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 Troubl...

Page 139: ...eck voltage 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 Troubl...

Page 140: ...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 141: ...arge pressure sensor refer to the Service Parts Information 23 Main PCB CN118 1 3 voltage value 5V 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 shooting 48 E86 1 Indicate or Display Detective ...

Page 142: ... pressure sensor Sensor characteristics check For the characteristics of the suction pressure sensor refer to the Service Parts Information 23 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 t...

Page 143: ...n 24 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 144: ... 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 145: ...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 146: ...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 147: ... 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 148: ...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 149: ...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 150: ...U 9 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 Chec...

Page 151: ...U 9A 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...

Page 152: ...U 9 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 Chec...

Page 153: ...d 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 69 ...

Page 154: ...nd check operation 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 Dis...

Page 155: ... and check operation 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 C...

Page 156: ... the EEV strainer Solenoid valve operation check Refer to Service Parts Information 18 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 and check operation Check Point 1 Check if 3 way valve is open If th...

Page 157: ... pressure switch 1 Check Point 8 Check the refrigerant amount Refrigerant charged amount check Check Point 6 Check the solenoid valve SV1 SV2 SV4 Check Point 3 Check the EEV strainer Solenoid valve operation check Refer to Service Parts Information 18 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 Point 1 Ch...

Page 158: ...ndoor 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 23 Check Point 6 Check the suction pressure sensor Check Point 7 Check the refrigerant amount Leak check Check Point 5 Check the solenoid valve SV1 Soleno...

Page 159: ...Ex 1 gas temp sensor from PCB and check For the sensor characteristics refer to the Service Parts Information 25 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 160: ...x 2 gas temp sensor from PCB and check For the sensor characteristics refer to the Service Parts Information 25 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 161: ...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 162: ...troller PCB defectve Check Point 1 Reset Power Supply Does Error LED indication show again Change Controller PCB and Set up the original setting Check any shortage or corrision on PCB Check Point 2 Check RB Unit components Check all connectors Lose connection or incorrect wiring Check Point 1 2 Check outside cause Voltage drop or noise etc Instant drop Check if there is a large load electric appar...

Page 163: ...tion PCB failure 4 Controller PCB defectve Check Point 1 Reset Power Supply Does Error LED indication show again Replace Communication PCB Check Point 2 Check RB Unit components Check if RB Unit Communication PCB is removed Check Point 1 2 Check outside cause Voltage drop or noise etc Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check i...

Page 164: ...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 165: ...AC input connector 3 Disconnect FAN motor AC input 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 Disc...

Page 166: ...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 167: ... Check 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...

Page 168: ... If the fuse was open state check the cause of short circuit on the AC circuit before replacing the spare parts Check Point 2 Fuse on the PCB NG Short circuit on AC circuit Disconnect AC Power input wires W101 W102 and Check short circuit Check Point 3 Short circuit check on AC circuit NG Short circuit on AC circuit Replace Main PCB Check Short circuit between Pin No 1 and Pin No 2 of SV coil Chec...

Page 169: ...T 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 DC Forecast of Cause 1 Setting Connection failure 2 Outside cause 3 Electrical Component defective Indoor Unit Check incorrect wiring between Indoor Unit Remote Control or terminals between Indoor Units Or check if there is an open cab...

Page 170: ...lve Refer to the See Service Parts Information Check Compressor Refer to theSee Service Parts Information Check Point 5 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 referring to Installation Manual or Design Technical Manual Pipe In Pipe Out Pipe In...

Page 171: ...on Is the installation of Air suction grille and front panel normal In case of Duct type Is Static Pressure range normal Refer to Data Technical Manual Is Main Unit installed in stable condition Is Bell Mouth installed normally OK Forecast of Cause 1 Abnormal installation Indoor Outdoor RB Unit 2 Fan failure Indoor Outdoor 3 EEV failure Indoor 4 Compressor failure Outdoor Abnormal noise is coming ...

Page 172: ...ive Check Float Switch Refer to Trouble Shooting Is Fan rotating Check Fan Motor Service Parts Information 19 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 clogge...

Page 173: ...an 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 174: ...h 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 which causes harmonic wave And check the complete insulation...

Page 175: ...2 Thermistor defective 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 DC If ...

Page 176: ...on 2 thermistor defective 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 DC ...

Page 177: ...FORMATION 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 Upon the temperature comi...

Page 178: ...4V IN If AC 0V Power Trans is failure Replace Power Trans OK Forecast of Cause 1 Terminal Connection Abnormal 2 Power Supply Abnormal 3 Power Trans 4 Power Supply PCB 5 Controller PCB 6 Cable Connection failure Check the connection of terminal between Power Trans and Power Supply PCB CN113 and Check if there is a disconnection or short of the cable If AC24V To the Check Point 4 Check Point 1 Check...

Page 179: ...l 3 Check terminal resistance value 53 Ohm 5 Line Resistance on the terminal borad one by one Terminal Resistance is located on the Outdoor unit PCB activated SET 5 4 ON and the Main PCB of RB Unit each Refer to the wiring diagram of Networlk cable To other refrigerant circuit Outdoor unit A B C D Measurement Terminal Resistance A Measurement Terminal Resistance A Measurement Terminal Resistance A...

Page 180: ...ormal Operation Possible Cause When SV1 blockage or Close position the refrigerant flow will be lessened Indoor unit Gas pipe Temp Hi pressure pipe temp Position of Solenoid coil SV4 SV4 SV4 SV5 SV1 SV6 SV3 SV2 SV5 SV1 SV3 SV2 SV1 SV3 SV2 UTP RX01AH UTP RX01BH UTP RX04BH UTP RX01BH Discharge Valve Suction Valve Equalization Valve Pressurization Equalization Valve Decompression Cooling Dry mode Hea...

Page 181: ... operation is the 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 t...

Page 182: ...W of the master 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 ...

Page 183: ...ithin 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 184: ... 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 is re...

Page 185: ...ompression 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 ...

Page 186: ...04 96 0 24 AOUA120 208 230 AOUA72 90 0 19 RED WHITE BLACK U V W ...

Page 187: ... valve Pressure sensor High pressure Low pressure 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 Dis...

Page 188: ... 8 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 pow...

Page 189: ...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 190: ... 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 Less that 150 Ohm NG More than 150 Ohm 04 100 CN522 Pin 1 3 Filter PCB INV K11CE 1100HUE FL0 ...

Page 191: ...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 192: ...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 193: ... 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 04 104 ...

Page 194: ...o 10 1 Normal Other than the above 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 53 2k to 58 8k Normal Other than the above Deteriorated defective 2 Discharge resi...

Page 195: ...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 196: ... 4 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 Pipe In Pipe Out Pipe In Pipe Out Check Point 6 Check Strainer Strainer normally does n...

Page 197: ...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 1 2 Pipe In Pipe Out CLOSE Pipe In Pipe Out OPEN 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 ...

Page 198: ... does not have 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 1 2 Pipe In Pipe Out CLOSE Pipe In Pipe Out OPEN 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 di...

Page 199: ...r Strainer normally does not have 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 1 2 Pipe In Pipe Out CLOSE Pipe In Pipe Out OPEN 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 op...

Page 200: ...peration Defrost Oil recovery Start up Pipe In TEMP Hi Pipe Out TEMP Hi Normal TEMP Normal TEMP Hi TEMP Hi TEMP OPEN CLOSE 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 1 2 If the valve closes by removing the connector of the valve whi...

Page 201: ...operation noise is heard Replace Main PCB The sound of operation noise is not heard Normal If the valve does not open when the connector of SV4 is removed from Main PCB Replace SV4 Pipe In Pipe Out Pipe In Pipe Out AC AC SOLENOIDE COIL SOLENOIDE COIL Normal TEMP Normal TEMP Hi TEMP Hi TEMP OPEN CLOSE Check Point 4 3 Check opening closing operation of SV4 Check if Valve is operating normally When V...

Page 202: ...HOT GAS Check Point 4 Check Voltage of Solenoid Coil If CN105 CN156 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 19 4 WAY VALVE 1 2 Remove CN105 CN156 from PCB and check the resistan...

Page 203: ...al protector Pr VIOLET Med BLUE Low RED Hi BLACK WHITE 150 C at 20 C Check Point ARUH48 60TLAV High Static Pressure Duct Type Check each winding resistance of the motor If Resistance value is abnormal replace motor Red Violet Violet Blue Red Black White Red Lead wire 8 94 7 9 56 7 3 41 7 2 65 7 Resistance value AC Thermal protector Pr VIOLET Med BLUE Low RED Hi BLACK WHITE 145 C at 20 C 04 114 SER...

Page 204: ...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 205: ...SURE 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 ...

Page 206: ... 10 5 0 5 10 15 20 25 30 40 50 60 70 80 90 100 110 120 4 14 23 32 41 50 59 68 77 86 104 122 140 158 176 194 212 230 248 168 6 129 8 100 9 79 1 62 6 49 8 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 27 8 21 0 16 1 12 4 9 6 7 6 6 0 4 8 3 8 2 5 1 7 1 2 105 4 58 2 44 0 33 6 25 9 20 2 15 8 12 5 10 0 8 0 5 3 3 6 27 4 20 7 15 8 12 2 9 5 7 5 5 9 4 7 3 8 2 5 1 7 1 2 0 8 0 6 0 4 0 3 Applicable Thermistors Di...

Page 207: ...esistance value SV1 SV2 SV3 SV4 SV5 SV6 1 35K 7 Check Point 2 Check Voltage from Main PCB Remove connector and check the voltage AC208 230V If the voltage does not appear replace Main PCB AC Upper side SV No Color of CN SV Name on ST DIP SW SET 1 Transmission PCB2 Transmission PCB1 Power supply LED Green Error LED Red DIP SW SET 2 SV1 Green SVD1 SV2 Blue SVB2 SV3 Black SVS SV4 White SVS SV5 Red SV...

Page 208: ...5 APPENDING DATA UNIT ...

Page 209: ......

Page 210: ...1 LPS SV1 EEV1 EEV2 TH1 TH2 TH3 TH9 HEX1 TH7 TH10 HEX2 TH4 RCV TH5 TH6 TH8 4WV 1 4WV 2 EEV3 TH11 SV3 SV2 HPSW1 CMP ACM SV4 EEV21 FAN21 Indoor unit2 HEX21 TH21 TH22 TH24 RB unit1 SVD1 SVB2 SVB1 SVS1 SVS2 RB unit2 SVD1 SVB2 SVB1 SVS1 SVS2 RB unit3 SVD1 SVB2 SVB1 SVS1 SVS2 EEV21 FAN21 Indoor unit3 HEX21 TH21 TH22 TH24 FP Check valve Capillary Strainer 3 way valve Service port Pressure regulation valv...

Page 211: ...or 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 thermistor PINK TH10 Heat exchanger 2 liquid thermistor GRAY TH11 C...

Page 212: ... 03 GAS LINE Discharge gas to Indoor unit GAS LINE Suction gas SVD1 SVB2 SVB1 SVS1 GAS LINE Discharge gas to Indoor unit GAS LINE Suction gas SVD1 SVB2 SVB1 SVS1 SVS2 GAS LINE Discharge gas to Indoor unit GAS LINE Suction gas SVD1 SVB2 SVB1 SVS1 SVS2 SVS3 ...

Page 213: ...o Indoor unit to Indoor unit GAS LINE Suction gas SVD1 SVB2 SVB1 SVS1 SVS2 SVD1 SVB2 SVB1 SVS1 SVS2 SVD1 SVB2 SVB1 SVS1 SVS2 SVD1 SVB2 SVB1 SVS1 SVS2 LIQUID LINE MARK DESCRIPTION SVS1 Solenoid valve Suction 1 SVS2 Solenoid valve Suction 2 SVS3 Solenoid valve Suction 3 SVB1 Solenoid valve Bypass 1 SVB2 Solenoid valve Bypass 2 SVD1 Solenoid valve Discharge 1 ...

Page 214: ...COMPACT CASSETTE TYPE MODELS AUUA7TLAV AUUA9TLAV AUUA12TLAV AUUA14TLAV AUUA18TLAV AUUA24TLAV 5 2 WIRING DIAGRAM 5 2 1 Indoor Unit 05 05 ...

Page 215: ...CASSETTE TYPE MODELS AUUB18TLAV AUUB24TLAV AUUB30TLAV AUUB36TLAV 05 06 ...

Page 216: ...SLIM DUCT SLIM CONCEALED FLOOR TYPE MODELS ARUL7TLAV ARUL9TLAV ARUL12TLAV ARUL14TLAV ARUL18TLAV 05 07 ...

Page 217: ...MEDIUM STATIC PRESSURE DUCT TYPE MODEL ARUM24TLAV 05 08 MODEL ARUM30TLAV ARUM36TLAV ...

Page 218: ...HIGH STATIC PRESSURE DUCT TYPE MODELS ARUH36TLAV ARUH48TLAV ARUH60TLAV 05 09 ...

Page 219: ...FLOOR CEILING TYPE MODELS ABUA12TLAV ABUA14TLAV ABUA18TLAV ABUA24TLAV 05 10 ...

Page 220: ...CEILING TYPE MODELS ABUA30TLAV ABUA36TLAV INDOOR UNITS INDOOR UNITS 05 11 ...

Page 221: ...WALL MOUNTED TYPE MODELS ASUA7TLAV ASUA9TLAV ASUA12TLAV ASUA14TLAV 05 12 ...

Page 222: ...MODELS ASUB18TLAV ASUB24TLAV 05 13 ...

Page 223: ...UA96TLBV AOUA120TLBV 05 14 5 2 2 Outdoor Unit 1 Note 1 X1 X2 To be connected to indoor unit or RB unit Z1 Z2 To be connected to other master outdoor unit H1 H2 To be connected to outdoor unit within same refrigerant system ...

Page 224: ...MODEL UTP RU01AH MODEL UTP RU01BH 5 2 3 RB Unit 05 15 ...

Page 225: ...MODEL UTP RU01CH 05 16 ...

Page 226: ...MODEL UTP RU04BH 05 17 ...

Page 227: ...MODELS AAUA48TLAV 5 2 4 Outdoor Air Unit 05 18 MODELS AAUA72TLAV ...

Page 228: ...MODELS AAUA96TLAV 05 19 ...

Page 229: ...MODELS ARUV12TLAV ARUV18TLAV ARUV24TLAV ARUV30TLAV ARUV36TLAV ARUV48TLAV ARUV60TLAV 5 2 5 Vertical Air Handler 05 20 ...

Page 230: ...6 DISASSEMBLY PROCESS ...

Page 231: ...tion 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 capacit...

Page 232: ...not touch electric 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 233: ...nal Terminal Main PCB Communication PCB 06 03 Fan driver PCB Inverter PCB Phase CT PCB 5 Screw tightening torque 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 5 0 7 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 Coil 2 4 0 1N m DANGER Orientation of the capacitor Pleas...

Page 234: ...ectricity 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 registration t...

Page 235: ... tightening torque at the installation Tightening torque is as follows Temporary tightening 0 3 0 1N m Final tightening 1 5 0 1N m Compound 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 Remove the mounting screw and code Screws For Magnetic relay ...

Page 236: ...ghtening 1 3 0 1N m 8 Fan driver PCB removal 06 06 Fan driver PCB Screws For IPM Spacers Spacers IPM Heat sink L 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 L and Heat sink K HEAT SINKER 20g 0000036795 Service Parts No Parts Name Compound ...

Page 237: ... Hook 3 places Screws 2 places Screws 6 places Handle Remove the 2 mounting screws 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 6 mounting screws Open the Control Box with handle ...

Page 238: ...rew Remove the SOLENOID COIL Remove the PRESSURE SENSOR with wrench There are two sensors High and Low pressure Remove the heat insulation 06 08 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 ...

Page 239: ...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 240: ...efrigerant 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 ...

Page 241: ...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 242: ...ing fire to oil when removing by the welding without cutting it Range Range Procedure for compressor installation Reverse procedure to removing the compressor Precautions for installation of Compressor 1 When brazing do not apply the flame to the terminal 2 When brazing be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale ...

Page 243: ...e center of plug will melt and make a hole 2 When you replace a fusible plug make sure to replace 4 way valve A assy extensively 3 When you replace a 4 way valve A assy make sure to drape a wet rag on it for keeping it cool If fusible alloy melts and makes a hole from heat vacuum drawing and refrigerant charging will be not available Also refrigerant inside will be discharged swiftly 4 When you we...

Page 244: ...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 Remove the co...

Page 245: ......

Page 246: ...2004 Fujitsu General Limited All rights reserved TM is a worldwide trademark of FUJITSU GENERAL LIMITED Product specifications are subject to change without notice 1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan ...

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