Mitsubishi Heavy Industries FDC121KXZEN1, Service Manual

Page 1: ... OUTDOOR UNIT Heat pump type KXZ series FDC121KXZEN1 140KXZEN1 155KXZEN1 1 Phase FDC121KXZES1 140KXZES1 155KXZES1 3 Phase SERVICE MANUAL Manual No 19 KX SM 318 Note 1 Regarding the Indoor unit series refer to the No 17 KX T 266 and 18 KX T 281 ...

Page 2: ... control 10 1 4 Operation control function by the outdoor control 25 2 SYSTEM TROUBLESHOOTING PROCEDURE 59 2 1 Basics of troubleshooting 59 2 2 Explanation of troubleshooting 60 2 3 Contents of troubleshooting 61 2 4 Outdoor unit control PCB replacement procedure 116 3 ELECTRICAL WIRING 121 4 PIPING SYSTEM 123 5 APPLICATION DATA 124 6 OUTDOOR UNIT DISASSEMBLY PROCEDURE 140 7 INDOOR UNIT DISASSEMBL...

Page 3: ...e backlight turns off automatically if there is no operation for certain period of time Lighting period of the backlight lighting can be changed If the backlight is ON setting when the screen is tapped while the backlight is turned off the backlight only is turned on Operations with switches and are excluded USB port USB connector mini B allows connecting to a personal computer For operating metho...

Page 4: ...Cover AIR CON No button Display the indoor unit number connected to this remote control CHECK button This button is used at servicing TEST button This button is used during test operation Weekly timer display Displays the settings of the weekly timer Operation setting display area Displays setting temperature air flow volume operation mode and oparation message Operation check indicator light Duri...

Page 5: ... to operate and when this is pressed once again it stops operating MODE button Every time this button is pressed displays switch as below AUTO COOL HEAT FAN DRY TEMP button Change the set temperature by pressing or button FAN SPEED button The fan speed is switched in the following order 1 speed 2 speed 3 speed 4 speed AUTO 1 speed U D button Used to determine the up down louver position L R button...

Page 6: ...eratures b CPU reset Reset CPU from the remote control as follows TOP screen Menu Service setting Service Maintenance Service password The selected screen is displayed The selected screen is displayed Service Maintenance 2 Special settings CPU reset Microcomputers of indoor unit and outdoor unit connected are reset State of restoration after power failure c Power failure compensation function Elec...

Page 7: ...function items are saved in the memory of indoor unit g Weekly timer peak cut timer or silent mode timer settings h Remote control function setting Please check the I U Set clock first on the initializing screen set the timer Other thanA C is connected If the following a to c appear check and repair as follows Communication check screen This appears if communications cannot be established between ...

Page 8: ... mode is cancelled at the recovery from power failure the setting of weekly timer is Operation mode a b Room temperature setting e Louver auto swing stop However the stop position 4 position is cancelled so that it returns to Position 1 f Remote control function items which have been set with the remote control function setting Indoor function items are saved in the memory of indoor unit Upper lim...

Page 9: ...and outdoor air temp The set temp and fan speed can be set A 7 External Ventilation When the ventilator is combined On Off operation of the external ventilator can be done It is necessary to set from Menu Service setting R C function settings Ventilation setting If the Independent is selected for the ventilation setting the ventilator can be operated or stopped A 8 Select the language Select the l...

Page 10: ...tting The fan speed for indoor units can be set B Filter sign The setting of filter sign display timer can be done from following patterns B Service password External input 1 The connect of control by external input 1 can be changed B External input 1 signal The type of external input 1 signal can be changed B External input 2 The connect of control by external input 2 can be changed B External in...

Page 11: ...ture operation mode air flow rate and warm up enabled disabled Note 1 It is necessary to set the clock to use this timer v Set OFF timer by clock Set the time to stop operation The time can be set in the unit of 5 minute This setting can be activated only once or at every time Note 1 It is necessary to set the clock to use this timer vi Weekly timer Set the ON or OFF timer for a week Up to 8 patte...

Page 12: ...Sleep time Sleep time Set OFF timer by hour Weekly timer Set ON timer by hour Set OFF timer by clock Set ON timer by clock Set OFF timer by hour Set ON timer by hour Set OFF timer by clock Set ON timer by clock Weekly timer 4 Hot start Cold draft prevention at heating a Operating conditions When either one of following conditions is satisfied the hot start control is performed i From stop to heati...

Page 13: ...door heat exchanger temperature detected with Thi R1 or R2 drops to 35 C or lower set the indoor fan to the low speed tap of each setting ii During the hot keep the louver is kept at the horizontal position b Ending condition When the indoor fan is at the lower tap at each setting it returns to the set air flow volume as the indoor heat exchanger temperature rises to 45 C or higher 6 Auto swing co...

Page 14: ...vent the cold start The louver position display LCD continues to show the display which has been shown before entering this control iii Louver free stop control When the louver free stop has been selected with the indoor function of wired remote control POSITION the louver motor stops when it receives the stop signal from the remote control If the auto swing signal is received from the remote cont...

Page 15: ...p this control is stopped immediately and the operating condition is restored v When the Fan OFF is selected the fan on the indoor unit of which the thermostat has been turned OFF is turned OFF The same occurs also when the remote control sensor is effective d Fan control during cooling thermostat OFF Except FDTC FDTQ FDUT15 56 FDK FDFL FDFU i Following fan controls during the cooling thermostat O...

Page 16: ...ter the compressor ON 1 OFF OFF 3 minutes delay Thermostat OFF in the condition of item 7 Compressor Indoor unit A Thermostat Indoor unit B Thermostat b When the oil return control has started while the thermostat is turned ON the thermostat is not turned OFF even if the thermostat OFF condition is satisfied during the oil return control 10 Drain pump control a This control is operated when the in...

Page 17: ...ntained during the drain detection 12 Operation check drain pump test run operation mode a If the power is turned on by the DIP switch SW7 1 on the indoor unit control PCB when electric power source is supplied it enters the mode of operation check drain pump test run It is ineffective prohibited to change the switch after turning power on b When the communication with the remote control has been ...

Page 18: ...up of multiple number of unit Max 16 indoor units Operation mode which is set by the remote control can operate or stop all units in the group one after another in the order of unit No 1 Thermostat and protective function of each unit function independently Note 1 Unit No is set by SW1 SW2 and SW5 2 on the indoor control PCB b Display to the remote control i Central or each remote control basis he...

Page 19: ...ontrol PCB However remote operation by CnT 6 or CnTA is not effective when Center mode is selected by central control Only the LEVEL INPUT is acceptable for external input however when the indoor function setting of Level input Factory default or Pulse input is selected by the function for External input of the wired remote control operation status will be changed as follows CnT CnT CnT CnT CnT Cn...

Page 20: ... control or central control ii In case of Pulse input setting Local setting It is effective only when the input signal to CnT 6 or CnTA is changed OFF ON and at that time unit operation ON OFF is inverted ON ON OFF OFF OFF ON ON ON ON Remote control OFF Remote control ON Remote control OFF Remote control ON OFF OFF ON ON OFF OFF ON OFF OFF OFF OFF ON ON OFF OFF CnT 6 or CnTA input Unit A Unit B Cn...

Page 21: ...tion permission prohibition setting Operation permission prohibition zone Operation permission Operation permission Operation permission Operation permission Operation permission Operation prohibition Operation prohibition Operation permission Operation prohibition Operation Operation Operation Stop Stop Stop Stop Operation prohibition Operation prohibition Operation prohibition Operation prohibit...

Page 22: ...on signal is given by the external input the operation mode is transmitted to the remote control Selection of cooling heating external input function External input selection External input method Level External terminal input CnT or CnTA Cooling heating Cooling heating Operation OFF Cooling zone Cooling zone Heating zone Heating zone OFF ON ON Cooling Heating Heating Cooling Heating Cooling Heati...

Page 23: ...r for combinations of CnT and CnTA refer to Page 62 External input selection Cooling heating selection External input method Level External input CnT or CnTA Cooling heating Cooling heating Competitive External input CnT or CnTA Cooling heating Cooling heating Competitive Pulse Operation OFF Cooling zone Cooling zone Heating zone Heating zone OFF ON ON Cooling Heating Heating Cooling Auto cooling ...

Page 24: ...ference of the remote control temperature sensor and the return air temperature sensor becomes bigger than 3 C 31 The operation judgment is executed every 5 minutes RC EX3A only Setting temperature Ts is changed according to outdoor temperature This control is valid with cooling and heating mode Not auto mode a Operate 5 minutes forcedly b Setting temperature is adjusted every 10 minutes i Cooling...

Page 25: ...um The setting time can be changed by 5 minutes interval The selectable range of capacity limit Peak cut is from 0 to 40 80 20 interval Holiday setting is available 33 Motion sensor control RC EX3A only The sensor determines the presence of people and the amount of activity and the following controls are done by the motion sensor Following settings are necessary to activate motion sensor control a...

Page 26: ...erheat 3 2 It turns OFF after retaining ON condition for a certain minutes 2 Compressor control Compressor rotation speed at cooling dehumidifying and heating operations are as follows Unit rps Item Model Cooling Dehumidifying operation Heating operation FDC121KXZE1 40 77 20 110 FDC140KXZE1 40 100 20 110 FDC155KXZE1 40 106 20 110 3 Outdoor fan control a Control contents of fan tap and fan speed Ou...

Page 27: ... R and the ambient air temperature sensed by Tho A dropped below the defrost operation start temperature in Fig 1 for 30 seconds continuously When the suction pressure saturated temperature calculated by the low pressure sensed by PSL and the ambient air temperature sensed by Tho A dropped below the defrost operation start temperature in Fig 2 for 30 seconds continuously TR Heat exchanger temperat...

Page 28: ...if this anomaly occurs 5 times within 60 minute it makes the unit anomalous stop E40 c Low pressure control i Compressor rotation speed protection control If low pressure sensor PSL detects 0 18MPa or lower for 10 seconds continuously it makes compressor rotaion speed decreasing If low pressure sensor PSL still detects 0 18MPa or lower 30 seconds after control it makes compressor rotation speed de...

Page 29: ...ever the lower f Power transistor temperature PT protective control If the power transistor temperature exceeds 85 C the compressor speed is controlled Speed is reduced once each minute Release Retention 81 85 Power transistor temperature ºC 6 Test run a Starting conditions i Turn ON the test run switch SW5 1 The switch is invalid if it is turned ON before the power ON ii Pump down switch SW5 3 mu...

Page 30: ...priority change P01 0 earlier entry priority factory setting 1 later entry priority Outdoor fan snow guard control P02 0 invalid factory setting 1 valid Outdoor fan snow guard control operation time setting P03 30sec factory setting 10 30 600sec Capacity save mode 3 P04 OFF invalid factory setting 000 040 060 080 Silent mode setting 2 P05 0 factory setting 3 the larger the number the stronger the ...

Page 31: ...trol displays the operating conditions Operation conditions are transferred to option central control 4 When the control command from remote control is not accepted Under the condition of the system all stop status by external input Center is displayed See Item 5 mentioned below 5 CnS1 performs the following operations depending on the short circuit or open of the jumper wire J13 In case of pulse ...

Page 32: ...oor PCB SW4 7 SW4 8 demand switching 0 Open 1 Short circuit SW4 7 SW4 8 Compressor upper limit speed rps FDC121KXZEN S1 FDC140KXZEN S1 FDC155KXZEN S1 Cooling Heating Cooling Heating Cooling Heating 0 0 57 65 74 76 78 76 1 0 42 49 56 57 58 57 0 1 29 33 37 38 40 38 1 1 0 0 0 0 0 0 5 CnS1 performs the following operations depending on the short circuited or open of the jumper wire J13 In the case of ...

Page 33: ...g conditions are not established Valid zone A Invalid 27 31 Outdoor operation mode Heating Outdoor operation mode Cooling Valid zone B 29 External temperature C Valid zone A Valid zone B Invalid 2 6 4 External temperature C b Sound level Reference data dB A dB A dB A dB A dB A dB A FDC121KXZEN1 53 56 50 47 46 44 FDC140KXZEN1 53 57 52 49 47 45 FDC155KXZEN1 54 57 53 50 47 46 FDC121KXZES1 53 56 50 47...

Page 34: ...fan is changeable from 10 to 600 seconds by P03 During this snow protection control the compressor s magnetic contactor 52C1 is ON d Ending conditions of outdoor fan snow protection control When following conditions are established i Snow protection control setting is invalid P02 0 or ambient air temperature 5 C and external input of outdoor fan snow protection control OFF opened ii Compressor ON ...

Page 35: ...val of the unit Pump down control at start stop 6 Forced cooling heating operation a With this control SW3 7 on the outdoor PCB is turned ON and CnS1 equipped with short circuit pin is shorted or opened so as to forcibly determined whether the indoor unit is operated for cooling or heating It is valid at P07 2 b If any operation mode other than the forcible mode is commanded from indoor unit the m...

Page 36: ...KXZEN S1 5 45rps FDC155KXZEN S1 6 ii As the startin 7 segment display shows PdS Channel 0 at the code display area iii During the pump down operation control the protective controls excluing low pressure protective control anomalous low pressure control and pressure ratio protection control and the error detection control are effective iv The sub cooling coil expansion valve EEVSC closes fully dur...

Page 37: ... error stop is raised by the setting on 7 segment P75 1 ii Contents of control The pump down operation for replacement is performed iii Ending condition When starting conditions are lost When the pump down operation has ended b Status 2 Emergency stop operation i Starting condition When the pump down operation has ended in the status 1 ii Contents of control ON is output to CnZ1 and the gas servic...

Page 38: ... Master indoor unit When the master indoor unit is turned off it become valid the first push priority on other indoor units remote controls Priority of required major operation mode s i s t i n u r o o d n i g n i t a r e p o f o y t i c a p a c l a t o t e h t h c i h w f o e d o m n o i t a r e p O larger There is no renewed judgment for 10 minutes after a change on the operation mode The judgmen...

Page 39: ... Cooling heating unmatched When unmatch occurs among indoor units it can be reset by either one of followings If the operation mode of outdoor unit is matched with that of indoor unit If the operation mode is changed to Fan or Stop on the indoor units on which Cooling heating is unmatched Indoor unit 0 Stop Fan Fan ON Indoor unit 1 Stop Heating Heating ON Indoor unit 0 Stop Cooling Invalid operati...

Page 40: ...he different mode from the forced operation mode is commanded from indoor unit the mode unmatch message is displayed on the LCD of remote control and the operation is entered in FAN mode 3 With the forced mode from indoor unit if a different operation mode is commanded following operations take place based on the forced cooling heating operation set with the 7 segment P38 P38 0 The operation mode ...

Page 41: ...ased by providing the compressor upper limit speed ac cording to the thermostat ON capacity Thermostat ON capacity Total capacity of indoor units which are operating with the thermostat ON a Correction of target high low pressure i Starting condition either of or When the external input function assignment P07 Multi system energy save control Valid When 7 segment P 9 Multi system energy save contr...

Page 42: ...rocedure Resetting operation Select code C96 If any anomalous data is retained the data display dEL is shown 3 seconds later Pressing SW7 for 3 seconds erases the memory data on RAM EEPROM data are not erased As the data are erased the data display shows When no anomalous data are retained it displays as well Unless the reset operation is performed data are retained Therefore if normal operation i...

Page 43: ...etting from the display of it is switched to C00 If SW8 or SW9 is pressed during the display of it changes to C00 However unless no button input is done for 10 seconds after change to C00 it changes to the display of automatically according to the precedence Display switching Special display is the display other than CXX When special display occurs Special display reset or button operation Button ...

Page 44: ...o C2 Under dome temperature CM2 C12 Tho P1 Power transistor temperature CM1 C13 Spare Tho P2 Power transistor temperature CM2 C14 Tho SC Sub cooling coil temperature 1 C15 Tho H Sub cooling coil temperature 2 C16 Tho S Suction pipe temperature C17 Spare Temperature sensor Active filter C18 CT1 CM1 current C19 Spare CT2 CM2 current C20 EEVH1 Heating expansion valve opening angle C21 Spare EEVH2 Hea...

Page 45: ...are Anomalous output C38 Spare 0 1 0 Close 1 Open Order of 100 Order of 10 Order of 1 C39 Spare 0 1 0 Close 1 Open Order of 100 Order of 10 Order of 1 Outdoor unit information C40 Number of connected indoor units 0 50 1 C41 Capacity of connected indoor units 0 200 C42 Number of indoor units with thermostat ON 0 50 1 C43 Required Hz total 0 999 1Hz C44 Cumulative compressor operation time CM1 0 655...

Page 46: ...ent mode ON Order of 10 Spare Order of 1 Spare C64 Spare 0 1 0 Close 1 Open Order of 100 Order of 10 Order of 1 C65 Protection control status 0 1 0 Close 1 Open Order of 100 HP control by compressor speed down control ON Order of 10 LP control by compressor speed down control ON Order of 1 Td control by compressor speed down control ON C66 Protection control status 0 1 0 Close 1 Open Order of 100 ...

Page 47: ...e Counter Power transistor 1 overheat 0 127 1 C81 Spare Counter Compressor 1 rotor lock 0 127 1 C82 Counter Inverter 1 desynchronism error 0 127 1 C83 Counter Inverter 1 comunication error cumulative 0 127 1 C84 Counter Indoor outdoor comunication error 0 255 1 C85 Counter CPU reset 0 255 C86 Spare Counter Anomalous low pressure Immediately after startup C87 Spare Counter Discharge pipe 2 anomalou...

Page 48: ... 80 Factory default is 0 OFF P05 Silent setting 0 Factory default 0 9 1 P06 External output function quota 0 Factory default 0 9 1 P07 External input CnS1 function quota 0 Factory default 0 1 P08 Spare External input CnS2 function quota 1 Factory default 0 1 P09 Spare External input CnG1 function quota 2 Factory default 0 1 P10 Spare External input CnG2 function quota 3 Factory default 0 1 Code No...

Page 49: ...its clear setting signal Interlocked with P34 For operation error protection P36 Spare P37 Spare P38 Spare P39 Spare 1 Compressor stop cause It shows the latest comprressor anomalous stop cause Compressor stop cause No At power on 0 Sensor disconnection and or short circuit Ambient air temperature 1 Outdoor heat exchanger temperture 1 2 Outdoor heat exchanger temperture 2 3 Discharge pipe temperat...

Page 50: ...ition Outdoor unit capacity data Remarks Single type Example 24HP S24 S Display with Horse Power of single type or single use of combination type Master unit of combination type Example 46HP S46 S Display with Horse Power of master unit of combination type Slave unit of combination type Example 20HP C20 C Display with Horse Power of slave unit of combination type iv Error retention and monitoring ...

Page 51: ...mber of connected indoor units 0 127 1 unit 1 16 Capacity of connected indoor units 0 65535 2 17 Number of indoor units with thermostat ON 0 255 1 unit 1 18 Total capacity of indoor units with cooling thermostat ON 0 65535 2 19 Total capacity of indoor units with heating thermostat ON 0 65535 2 20 Operation mode 0 2 1 0 Stop 1 Cooling 2 Heating 21 Inverter CM1 actual operation frequency 0 255 1Hz ...

Page 52: ...3H1 0 Open 1 Short circuit Bit1 Spare 63H1 R 0 Open 1 Short circuit Bit2 CnS1 0 Open 1 Short circuit Bit3 Spare CnS2 0 Open 1 Short circuit Bit4 Spare CnG1 0 Open 1 Short circuit Bit5 Spare CnG2 0 Open 1 Short circuit Bit6 Spare 0 Open 1 Short circuit Bit7 Spare 0 Open 1 Short circuit 49 DIP switch SW3 1 Bit0 SW3 1 0 OFF 1 ON Bit1 SW3 2 0 OFF 1 ON Bit2 SW3 3 0 OFF 1 ON Bit3 SW3 4 0 OFF 1 ON Bit4 S...

Page 53: ...output 1 Bit0 52C1 0 OFF 1 ON Bit1 20S 0 OFF 1 ON Bit2 CH1 0 OFF 1 ON Bit3 Spare SV1 0 OFF 1 ON Bit4 Spare SV6 0 OFF 1 ON Bit5 Spare SV11 0 OFF 1 ON Bit6 Spare SV12 0 OFF 1 ON Bit7 Spare FMC1 2 0 OFF 1 ON 55 Relay output 1 Bit0 Operation output CnH 0 OFF 1 ON Bit1 Error output CnY 0 OFF 1 ON Bit2 External output CnZ 0 OFF 1 ON Bit3 Spare 0 OFF 1 ON Bit4 Spare 0 OFF 1 ON Bit5 Spare 0 OFF 1 ON Bit6 ...

Page 54: ...ntrol implementing 0 Normal 1 Implementing Bit2 Silent mode implementing 0 Normal 1 Implementing Bit3 0 Normal 1 Implementing Bit4 0 Normal 1 Implementing Bit5 Spare 0 Normal 1 Implementing Bit6 Implementing pump down control at start stop 0 Normal 1 Implementing Bit7 Low ambient air temperature control implementing 1 0 Normal 1 Implementing 67 Control status 2 1 Bit0 Pump down control for removal...

Page 55: ...Td protection 2 1 Compressor dilution ratio protection control 0 Normal 1 Implementing Bit1 Td protection 3 1 Indoor EEV minimal opening control at heating stop 0 Normal 1 Implementing Bit2 Td protection 4 1 Outdoor EEV control 0 Normal 1 Implementing Bit3 Compression ratio protection 1 Compressor capacity control 0 Normal 1 Implementing Bit4 Compression ratio protection 2 1 Outdoor EEV control 0 ...

Page 56: ... 0 4 1 1 82 Control status INV1 desynchronism error counter 0 127 1 1 83 Control status INV1 communication error counter cumulative 0 255 1 1 84 Spare Control status INV1 power transistor overheat error counter 0 127 1 1 85 Spare Control status INV1 rotor lock error counter 0 127 1 1 Setting value display 86 Operation priority switching outdoor fan snow protection control 0 1 1 0 First push priori...

Page 57: ... 4 Heating 107 Registered indoor 1 8 request Hz 0 255 1Hz 8 108 Registered indoor 1 8 answer Hz 0 255 1Hz 8 Check operation information 109 Check operation status 0 7 1 0 Normal 1 Check operation starting condition insufficient 2 Check operation preparation operation 3 Check operation implementation 4 Check operation interrupted 5 Service valve closing failure 6 Indoor unit failure 7 Check operati...

Page 58: ... Indoor 5 unmatch check error 0 OFF 1 ON Bit5 Indoor 6 unmatch check error 0 OFF 1 ON Bit6 Indoor 7 unmatch check error 0 OFF 1 ON Bit7 Indoor 8 unmatch check error 0 OFF 1 ON 113 Registered indoor 1 8 EEV check error 1 Bit0 Indoor 1 EEV check error 0 OFF 1 ON Bit1 Indoor 2 EEV check error 0 OFF 1 ON Bit2 Indoor 3 EEV check error 0 OFF 1 ON Bit3 Indoor 4 EEV check error 0 OFF 1 ON Bit4 Indoor 5 EE...

Page 59: ...g table SW4 2 SW4 3 SW4 4 SW4 7 Demand ratio selection See following table SW4 8 Demand ratio selection See following table J13 External input Level Pulse J15 Defrost start temperature Normal Cold region Notes 1 Jumper wires J13 J15 indicate short circuit open 2 Dip switch SW s indicate OFF ON Model selection with SW4 1 SW4 4 Model Switch FDC121KXZEN1 FDC121KXZES1 FDC140KXZEN1 FDC140KXZES1 FDC155K...

Page 60: ...lated to any hardware parts SV main body coil capillary check valve sensor etc Is it a major component Compressor inverter PCB and outdoor DC fan motor Is it a failure of electrical component Error on indoor unit or outdoor unit Indoor unit Outdoor unit Is the remote control connected Was the power source reset after the error occurred Check and write down the momentary data retained in before the...

Page 61: ...sure to check both fan motor 1 and 2 After completion of checking both fan motor 1 and 2 replace the anomalous fan motor Turn the power ON Power circuit breaker ON and start operation with the test run switch Check between 1 and 2 of CnA2 on the control PCB to see if DC 15V is detected Be sure to wait for 3 minutes after turning the power circuit breaker off Disconnect the fan motor wires Both the...

Page 62: ... subcooling coil temperature sensor Tho SC H anomaly Sensor wire breakage 98 E38 E38 Outdoor air temperature sensor anomaly Tho A Sensor wire breakage 99 E39 E39 1 Discharge pipe temperature sensor anomaly Tho D1 Sensor wire breakage 100 E40 E40 High pressure anomaly 63H1 1 activated System error 101 E41 E51 E41 E51 1 Power transister overheat System error 102 E42 E42 Current cut 1 2 System error ...

Page 63: ...fumidifying or heating operation from remote control Note 1 Outdoor 35ºC Indoor 27ºCDB 19ºCWB It is normal This unit is designed to start in the soft start mode by detecting the compressor under dome temperature when it restart after power reset It is necessary to replace to higher capacity unit or to install additional unit Compressor refrigerant oil protective control at starting is activated Fo...

Page 64: ... heating operation from remote control Note 1 Outdoor 7ºC Indoor 20ºC It is normal This unit is designed to start in the soft start mode by detecting the compressor under dome temperature when it restart after power reset It is necessary to replace to higher capacity unit or to install additional unit Compressor refrigerant oil protective control at starting is activated For the contents of contro...

Page 65: ...ation resistance may drop to a few MΩ because of refrigerant migrated in the compressor When the earth leakage breaker is activated at lower insulation resistance check the following points 6 hours after power ON check if the insulation resistance recovers to normal When power ON crankcase heater heat up compressor and evaporates the refrigerant migrated in the compressor Check if the earth leakag...

Page 66: ...e looseness Prevent the vibration from transmitting to wall and etc by fixing pipes on the wall tightly or wrapping rubber cushion around the pipe which goes through the hole in the wall or applying other appropriate means Strength of ceiling wall floo etc may be insufficient Review the installation place or apply reinforcement to increase the strength Check for leaning of installed unit or incorr...

Page 67: ... likely to occur particularly during cooling or defrost operation in the heating mode It is normal The noise vibration occurs when the refrigerant starts or stops flowing It is normal When the defrost operation starts or stops during heating mode the refrigerant flow is reversed due to switching 4 way valve This causes a large change in pressure wich produces a blowing sound It may also accompany ...

Page 68: ... Intrusion of air nitrogen etc In such case it is necessary to recover refrigerant vacuum dry and recharge refrigerant Since there could be many causes of noise vibration the above may not cover all In such case check the conditions when where how the noise vibration occurs according to following check points and ask our consultation Indoor outdoor unit Cooling heating fan mode Startup stop during...

Page 69: ...g YES Does the louver link press LS till crick sound can be heard NO NO YES In cases of FDTW FDTS and FDTQ Does the louver operate when power on Notes 1 LM Louver motor 2 LS Limit switch YES NO NO NO NO YES Operate after waiting for more than 1 minute It is normal if LM can be stopped by pressing LS two times In cases of FDT FDTC FDE and FDK Check the remote control whether it is fixed free flow s...

Page 70: ... respectively Is DC8V detected between CNP Is JX1 open None of actuator etc is short circuited Are fuses OK Is resistance between of CNW0 OK Is DC280V detected between CNM FDT FDTC FDK Is resistance to FM LM and etc OK Note 1 Check the fuse at the power source side 1 2 anomaly Replace it Wrong wiring or broken wires between outdoor and indoor units Indoor unit PCB anomaly Replace it Replace FM LM ...

Page 71: ...ween of CNW0 OK Is DC5V detected between of CNW2 Is power source to FM LM and etc OK Note 1 Check the fuse at the power source side 1 2 3 4 Model equipped with transformer Tri Models other than shown at left Is DC18V or higher detected between Red Red CNW2 at the transformer secondary side anomaly Replace it Wrong wiring or broken wires between outdoor and indoor units Indoor unit control PCB or p...

Page 72: ...etween X and Y in the indoor terminal block exceed 15 VDC YES NO YES NO NO YES Does the voltage between X and Y in the indoor terminal block exceed 15 VDC Remove wire for the remote control Power source reset YES Correct Remote control wire breakage Replace remote control Malfunction by temporary noise Defective indoor unit control PCB Replace Remote control wire breakage Replace remote control 2 ...

Page 73: ... DC18V detected between of CNW2 Disconnect the remote control wires NO Is DC15V or higher detected between X Y of indoor unit terminal block Model equipped with transformer Tri Models other than shown at left YES YES YES YES NO NO YES NO NO Correct it Replace wires Replace remote control Indoor unit power PCB anomaly Replace it Indoor unit control PCB anomaly Replace it Replace transformer Indoor ...

Page 74: ...se filter PCB Connect wires correctly Indoor unit control PCB anomaly Replace it Indoor outdoor unit control PCB anomaly Replace it Remote control anomaly Replace it Breakage of connecting wires of remote control Replace it Correct the connecting wires between indoor and outdoor units Outdoor unit control PCB anomaly Replace it Breakage of connecting wire Noise Indoor unit control PCB anomaly Repl...

Page 75: ...Isn t there any short circuit between phases of noise filter Isn t there any crack or damage on power transistor module or diode stack Isn t there any anomaly on reactor Replace noise filter Replace reactor Replace inverter PCB Replace fuse 2 Error detection method 3 Condition of error displayed 4 Presumable cause Fuse blown Noise filter anomaly Anomalous connection of wire between PCBs Indoor uni...

Page 76: ...ndoor unit control PCB OK Is AC18V or higher is detected between Red Red at secondary side of indoor unit transformer 1 Is DC10 11V between X Y at indoor unit control PCB side when removing remote control Note 1 except FDT and FDTC Fuse blown Replace fuse Transformer anomaly Remote control wire short circuited Remote control anomaly Indoor unit control PCB anomaly Remote control anomaly Breakage o...

Page 77: ...3 L3 L1 respectively at outdoor unit terminal block Is AC220 240V detected between L N at indoor unit teminal block NO NO NO NO NO YES YES YES YES YES YES A WAIT Refer next page Indoor unit control PCB anomaly Replace it Indoor unit control PCB anomaly Replace it Remote control anomaly Replace it Breakage of connecting wires of remote control Replace it Correct the connecting wires between indoor ...

Page 78: ...K Is there any anomaly on outdoor fan motor Once turn OFF the breaker and turn ON it again at 3 minute after power OFF Does it become normal Check inverter before replacement of 52C NO NO NO NO NO NO YES YES YES YES YES YES A B Normal Malfunction by temporary noise Refer next page Replace noise filter Connect the connecting wire properly Correct connection In case of breakage of wire replace it Ou...

Page 79: ...use Replace electrolytic capacitor Replace reactor Isn t there any short circuit between phases at input terminal of inverter PCB Isn t there any crack or damage on power transistor module or diode stack Isn t there any anomaly on reactor Isn t there any anomaly on electrolytic capacitor YES YES YES YES YES NO NO NO NO NO B 2 Error detection method 3 Condition of error displayed 4 Presumable cause...

Page 80: ...X Y detected at remote control terminal Is DC10V or higher between X Y wires detected when removing remote control Are connecting wires between indoor and outdoor units connected properly Remote control anomaly Remote control anomaly Correct connecting wire Indoor unit control PCB anomaly 2 Error detection method 3 Condition of error displayed 4 Presumable cause Fuse blown Noise filter anomaly Ano...

Page 81: ...nnect the wire A or B between indoor and outdoor units Reset power source 3 1 Note 2 Only unit with drain pump 2 NO Malfunction by noise Check peripheral environment Defective remote control or defective indoor PCB Replace Move to E5 Communication error during operation diagnosis 2 Error detection method When normal communication is interrupted for more than 2 minutes between the remote control an...

Page 82: ...ce is reset addresses will not be confirmed YES NO YES NO YES NO Review number of connected units Correct indoor unit address setting Implement test run Replace indoor unit control PCB Before replacement confirm whether the rotary switch for address setting is not damaged It was experienced that No 5 on rotary switch was not recognized 2 Error detection method More than 129 indoor units are connec...

Page 83: ...cases check signal wires between indoor outdoor units locally YES Is the outdoor unit address set on the indoor unit OK YES Is the LED on indoor unit control PCB OK YES Is protective fuse for the Superlink circuit blown NO Does E3 E5 occurs YES NO NO NO YES YES NO NO Temporary malfunction by noise Identify the source of noise and correct it Change to spare circuit Indoor unit control PCB anomaly R...

Page 84: ...kage of signal wires between indoor and outdoor units YES NO YES NO YES NO In case that indoor unit red LED flashes 2 times Repair signal wires Repair signal wires Go to the diagnosis of WAIT 1 Unit is normal Malfunction by temporary noise etc Outdoor unit control PCB anomaly Network communicaion circuit anomaly Replace it Unit is normal Malfunction by temporary noise etc 2 Error detection method ...

Page 85: ...racreristics of indoor unit heat exchanger temperature sensor Thi R1 R2 R3 5kΩ at 25ºC Temperature ºC Insert the connector securely Replace sensor Thi R Replace indoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Thi R1 R2 R3 3 Condition of error displayed If 50ºC or lower is detected for 5 seconds continuously compressor stops After 3 minutes de...

Page 86: ... 50 Temperature sensor resistance kΩ Temperature C 5kΩ at 25 C Insert the connector securely Replace sensor Thi A Replace indoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Thi A 3 Condition of error displayed If 50 C or lower is detected for 5 seconds continuously compressor stops After 3 minutes delay the compressor is restarted automatically ...

Page 87: ...p OK NO YES NO YES NO NO Check float switch Check the connection of CnI If it is loose connect it securely Replace indoor unit control PCB Check option equipment Correct setting to Humidifier drain pump motor interlock Indoor unit control PCB anomaly Replace it Check the wiring of drain pump motor Correct it Check drain pump motor 2 Error detection method Float switch is activated 3 Condition of e...

Page 88: ...pplicable model 5 Troubleshooting All models Diagnosis Countermeasure Aren t more than 17 indoor units connected to one remote control NO YES Remote control anomaly Replace it Reduce to 16 or less units 2 Error detection method When it detects more than 17 of indoor units connected to one remote contorl 3 Condition of error displayed Same as above 4 Presumable cause Excessive number of indoor unit...

Page 89: ...displayed Same as above 4 Presumable cause Mistake in address setting for indoor unit Note Address setting method list Figures in are for Previous Superlink models Models for new Superlink protocol Models for Previous Superlink protocol Indoor unit address setting Outdoor unit address setting Indoor unit address setting Outdoor unit address setting IndoorunitNo switch OutdoorunitNo switch Outdooru...

Page 90: ...ter Replace the fan motor Check power source voltage Replace fan motor and power PCB Replace fan motor If the anomaly persists after replacing the fan motor replace the indoor unit control PCB Malfunction by temporary noise 2 Error detection method Detected by revolution speed of indoor fan motor 3 Condition of error displayed When actual revolution speed of indoor fan motor drops to lower than 20...

Page 91: ...matter Replace fan motor Replace fan motor and power PCB Replace fan motor If this anomaly persists after replacing the fan motor replace indoor unit control PCB Malfunction by temporary noise 2 Error detection method Detected by revolution speed of indoor fan motor 3 Condition of error displayed When actual revolution speed of indoor fan motor drops to lower than 200min 1 for 30 seconds continuou...

Page 92: ...yed Same as above 4 Presumable cause Mistake in SW7 1 setting Due to forgetting to turn OFF SW7 1 after indoor unit operation check Note Indoor unit operation check drain pump check mode If the power is ON after SW7 1ON indoor unit operation check drain pump check mode can be established 1 When the communication between remote control and indoor unit PCB is established 15 seconds after power ON it...

Page 93: ...r the initial detection 4 Presumable cause Anomalous connection of remote control temperature sensor Remote control temperature sensor anomaly Remote control PCB anomaly Note After 10 seconds has elapsed since remote control temperature sensor was switched from invalid to valid E28 will not be displayed even if the sensor harness is disconnected or broken However in such case the indoor return air...

Page 94: ... and outdoor units correctly YES NO Is the voltage between L1 N at the terminal block on indoor unit AC220 240V NO Is the voltage between L1 L2 L2 L3 and L3 L1 at the terminal brock on outdoor unit AC380 415V respectively YES YES NO Correct the wiring Replace outdoor unit control PCB Disconnection or breakage of wire between indoor and outdoor unit Replace indoor unit PCB 2 Error detection method ...

Page 95: ...y switch for address setting is not damaged It was experienced that No 5 on rotary switch was not recognized 2 Error detection method address No exsisted in the same Superlink system by scanning the address No set for each outdoor unit with microcomputer 3 Condition of error displayed When duplicated outdoor unit address No exists in the same Superlink system 4 Presumable cause Mistake in the addr...

Page 96: ... occurs immediately after the power on or during operation or stopping It will be useful to persuade the customer why an improvement of power source is required by showing these data Propose an improvement to the customer Check it as much as possible under the operating conditions for 30 minutes before error occurred Replace outdoor unit control PCB Wait and see without taking any action 2 Error d...

Page 97: ...ics are correct referring to the characteristics list of E39 Page 100 And if necessary replace the discharge pipe temperature sensor Check it as much as possible under the operating conditions for 30 minutes before error occurred Wait and see Continue to obtain data if possible Keep connecting the Mente PC Check refrigerant amount again 2 Error detection method Detection of anomalously high temper...

Page 98: ...nt Connect the signal wires between indoor and outdoor units securely Insert the connector securely Replace the sensor after checking whether the sensor characteristics is OK ot not Restart operation and check it as much as possible under the operating conditions for 30 minutes before error occurred Wait and see If possible continue to collect data Keep connecting Mente PC Replace EEV coil or EEV ...

Page 99: ... conditions Check the conditions whether it occurs immediately after the power on or during operation or stopping Check the sensed value Compare the temperature on Mente PC with actual measured value Insert the connector securely Replace sensor Tho SC Tho H Tho R Replace outdoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Tho R or Tho SC or Tho ...

Page 100: ...ately after the power on or during operation or stopping Check the sensed value Compare the temperature on Mente PC with actual measured value Insert the connector securely Replace sensor Tho A Replace outdoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Tho A 3 Condition of error displayed If 30 C or lower is detected for 5 seconds continuously ...

Page 101: ...condition Check the conditions whether it occurs immediately after the power on or during operation or stopping Check the sensed value Compare the temperature on Mente PC with actual measured value Insert the connector securely Replace sensor Tho D1 Replace outdoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Tho D1 3 Condition of error displayed...

Page 102: ...lf according to the troubleshooting procedure of E54 after retarting operation If the high pressure sensor PSH fails replace it If the connector is disconnected or the harness is broken correct it Also check whether the high pressure switch is properly mounted or not Open operation valve Check it as much as possible under the operating conditions for 30 minutes before error occurred Replace outdoo...

Page 103: ... Continue to obain data if possible Keep connecting the Mente PC If the cooling fan does not run in spite of the operation ON range check the voltage at the connector of cooling fan If the 220 240V is detected repalce cooling fan motor If 0V is detected replace outdoor unit control PCB After checking the loose connection of connetor or breakage of harness replace inverter PCB Connect the connector...

Page 104: ...l increase of high pressure and or test run several times restarting may recover it because liquid refrigerant in the compresser is discharged from the compressor Replace compressor 2 Error detection method In order to prevent from overcurrent of inverter if the current exceeds the compressor stopping 3 Condition of error displayed If the output current of inveter makes the compressor stopping Aft...

Page 105: ...ere any anoumalous sound on the compressor Continue from previous page NO After resetting power for several times does it become normal NO Temporary noise may cause of anomaly If noise source can be found take countermeasure Replace inverter PCB Replace inverter PCB 2 Error detection method In order to prevent from overcurrent of inverter if the current exceeds the compressor stopping 3 Condition ...

Page 106: ...nd correct In order to operate the unit tentatively even if total capacity of connected indoor units exceeds 150 of outdoor unit capacity turn ON the dip switch SW5 4 on outdoor unit control PCB However since this tentative solution could cause trouble be sure to correct it as soon as possible Signal wire may be connected to other systems Separate the signal wire Correct addresses Either one of ad...

Page 107: ...unit control PCB YES NO Check and save the data of operating conditions Insert the connectors securely Switch OFF all No power on inverter PCB Find the cause Anomalous fan motor FDC121 155KXZEN1 only Faulty power circuit of control PCB FDC121 155KXZEN1 only Connect the signal wires correctly Replace inverter PCB OK 2 Error detection method 3 Condition of error displayed If the communication betwee...

Page 108: ...ddress manually Replace outdoor unit PCB Defective rotary switch Before replacement the rotary switch for address setting is not damaged It was experienced that No 5 on rotary switch was not recognized the indoor SW5 2 100 of order for indoor address setting is OK or not 2 Error detection method If the auto address setting and manual address setting are mixed in one Superlink network 3 Condition o...

Page 109: ...rror detection method By detecting the rotation speed of outdoor fan motor 3 Condition of error displayed If the actual rotation speed of outdoor fan motor FMo1 is 100min 1 or lower for 30 seconds continuously outdoor fan stops After 3 minute delay it restarts automatically but if this anomaly occurs 5 times within 60 minutes after the initial stop 4 Presumable cause Faulty outdoor unit control PC...

Page 110: ...tor Replace low pressure sensor Replace outdoor unit control PCB Correct temperature sensor connector Replace heat exchanger temperature sensor Replace indoor unit control PCB Replace EEV coil Replace EEV main body or strainer Check for short circuit of and failure of indoor fan motor 2 Error detection method Detected by low pressure sensor 3 Condition of error displayed At startup with power on L...

Page 111: ...ccurs immediately after the power on or during operation or stopping Check the sensed value as well Compare the temperature on Mente PC with actual measured value Replace sensor Replace control PCB 2 Error detection method Detection of anomalously low temperature resistance 3 Condition of error displayed If 50 C is detected for 5 seconds within 2 minutes to 2 minutes 20 seconds after the compresso...

Page 112: ...Output voltage V Output voltage V Check and save the data of operating conditions Check the conditions whether it occurs immediately after the power on or during operation or stopping Check the sensed value Insert the connector securely and restart operation Temporary malfunction by noise Correct if the source of noise is specified Replace sensor PSH PSL Replace outdoor unit control PCB 2 Error de...

Page 113: ...n Check the conditions whether it occurs immediately after the power on or during operation or stopping Check the sensed value Compare the temperature of Mente PC data with actual measured value Insert the connector securely Replace power transistor temperature sensor Tho P1 Replace outdoor unit control PCB 2 Error detection method Detection of anomalously low temperature resistance of Tho P1 3 Co...

Page 114: ... operating condition Refrigerant might be migrated in the refrigerant oil in the compressor Wait for about one hour under the condition of power ON and start again Turn the on crankcase heater ON and evaporate the liquid refrigerant migrated in the compressor The model setting could be wrong Check the DIP switch for model setting on the outdoor unit control PCB 2 Error detection method E58 is disp...

Page 115: ...he operation for rotor detection of compressor motor 3 Condition of error displayed If compressor fails to startup for 20 times 10 patterns x 2 times It is availabel to reset by remote control after 3 minutes delay 4 Presumable cause Faulty fan motor Faulty outdoor unit control PCB Faulty inverter PCB Anomalous power source voltage Nonconformity of refrigerant amount and refrigerant circuit Faulty...

Page 116: ...g in Mente PC NO NO YES Check and save the data of operating conditions Check the conditions whether it occurs immediately after the power on or during operation Replace remote control PCB Replace indoor unit control PCB Check the cause of emergency stop It is better to have the data for 30 minutes before stopping when instructing the installer 2 Error detection method When ON signal is inputted t...

Page 117: ...AUTION Band the wiring so as not to tense because it will cause an electric shock Replacement the control PCB according to the following procedure 1 Replace the PCB after elapsing 3 minutes from power OFF Be sure to measure voltage DC on both capacitor terminals located in control back and check that the voltage is discharged sufficiently Refer to Fig 2 2 Disconnect the connectors from the control...

Page 118: ...it is applied to prevent damage on power transistor Tighten the screw of power transistor on inverter PCB and connect the terminal block Confirm the connection and don t use soldering in the connection Tighten properly the power transistor with a screw and make sure there is no slack Power transistor can be damage if not properly tighten Recommended power transistor tightening torque 0 98 1 47N m ...

Page 119: ...e sure it is applied to prevent damage on power transistor e Tighten the screw of power transistor on inverter PCB and connect the terminal block Confirm the connection and don t use soldering in the connection Tighten properly the power transistor with a screw and make sure there is no slack Power transistor can be damage if not properly tighten Recommended power transistor tightening torque 0 98...

Page 120: ...W4 3 ON SW4 Power source voltage Model Switch FDC121KXZEN1 FDC140KXZEN1 FDC155KXZEN1 FDC121KXZES1 FDC140KXZES1 FDC155KXZES1 SW4 4 ON OFF SW5 Function setting Switch Function SW5 1 ON Test run switch Test run OFF Test run switch Normal SW5 2 ON Test run operation mode Cooling OFF Test run operation mode Heating SW5 3 ON Pump down switch Pump down OFF Pump down switch Normal SW7 8 9 Function setting...

Page 121: ...or inverter PCB was turned ON 2 After 15 seconds since power has turned ON LED start ON OFF for 5 seconds cyclically and it repeats 10 times 3 Check ON OFF status of 6 LED s on the checker 4 Judge the PCB by ON OFF status of 6 LED s on the checker 5 Be sure to turn off JSW10 4 on outdoor inverter PCB after finishing the check operation ON OFF status of LED If all of LED are ON OFF according to fol...

Page 122: ...r t c e l E r o t o m n a F e s u F r o s n e s e r u s s e r p h g i H e l u d o m r e w o p t n e g i l l e t n I l a m r o n e r a p s g n i t t e s l a n i m r e t k n i l r e p u S l e v e l e s l u p h c t i w s t u p n i l a n r e t x E l a m r o n t c i r t s i d r e h t a e w d l o c e r u t a r e p m e t t r a t s t s o r f e D r o t c a e R r o t a c i d n i n o i t c e p s n I d e R p ...

Page 123: ...Temperature sensor d i u q i l l i o c g n i l o o c b u s Temperature sensor s a g l i o c g n i l o o c b u s Temperature sensor l i o c e v l a v y a w 4 n o i t c e t o r P h c t i w s e r u s s e r p h g i H k r a M e m a N k r a M C H C M C Z A N C T C M D C S V E E H V E E 1 o M F F H S P M P I 0 1 J 3 1 J 5 1 J L 1 D E L 2 D E L 3 D E L L S P 1 W S 2 W S 1 3 W S 5 3 W S 7 3 W S 7 4 W S 8 4...

Page 124: ...apillary tube Compressor Low pressure sensor PSL Temperature sensor Suction pipe Tho S Temperature sensor Discharge pipe Tho D1 CM Gas piping φ15 88 Liquid piping φ9 52 Strainer Electronic expansion valve Strainer Heat exchanger Strainer Electronic expansion valve Strainer Thi R2 Temperature sensor Entrance Thi A Thi R3 Temperature sensor Exit Thi R1 Heat exchanger To next indoor units Temperature...

Page 125: ... pump down operation If disconnecting refrigerant pipes in state of opening service valves before compressor stopping you may incur frost bite or injury from an abrupt refrigerant outflow and air can be sucked which can cause burst or personal injury due to anomalously high pressure in the refrigerant circuit Ensure that no air enters in the refrigerant circuit when the unit is installed and remov...

Page 126: ... is attached in the unit Use it for protection of a knock out hole Use it to fix the wiring When the installation work is completed give instructions to the customer and ask him her to keep it Items sold separately Refrigerant pipe distribution parts which are not contained in the package will be required for installation As for refrigerant pipe distribution parts we offer branching pipe sets Mode...

Page 127: ...t To couple with the header use a different diameter pipe joint to adjust to the pipe diameter specified for the indoor unit The header must be so installed that it branches horizontally for both gas and liquid Item Outdoor unit Main pipe Total capacity of indoor units Model 121 140 155 less than 70 70 or more Gas pipe φ15 88 φ12 7 φ15 88 Liquid pipe φ9 52 φ9 52 φ9 52 Please use pipes clean on bot...

Page 128: ...r may not spill out Use an elbow to be arranged on the user s part to connect control valves to the piping In anchoring piping on the installation site give 1 5m or a longer distance between an outdoor unit and an anchoring point where the piping is secured as illustrated below A failure to observe this instruction may result in a pipe fracture depending on a method of isolating vibrations employe...

Page 129: ... hand When pressure inside builds up to a sufficient level remove the hand to flush in flushing a pipe close the other end of the pipe with a plug Nitrogen gas Although an outdoor unit itself has been tested for air tightness at the factory please check the connected pipes and indoor units for air tightness from the check joint of the service valve on the outdoor unit side While conducting a test ...

Page 130: ...th insufficient refrigerant the compressor will be damaged In particular when adding refrigerant during operation complete the job within 30min Fill this unit only with the standard amount of refrigerant piping length 0m fill quantity Determine the amount of refrigerant to be charged additionally using the following formula and put down the amount of refrigerant added on the refrigerant charge vol...

Page 131: ... 60227 IEC 53 Please do not use anything lighter than polychloroprene sheathed flexible cord cord designation 60245 IEC57 for supply cords of parts of appliances for outdoor use b Use separate power sources for the indoor and outdoor units c The power sources for indoor units in the same system should turn on and off simultaneously d Ground the unit Do not connect the grounding wire to a gas pipe ...

Page 132: ...tion Use specified wires in wiring and fasten them securely in such a manner that the terminal blocks are not subject to external force In fastening a screw of a terminal block use a correct size driver Fastening a screw of a terminal block with excessive force can break the screw When electrical installation work is completed make sure that all electrical components within the electrical componen...

Page 133: ...e between the outdoor units 1 2 Attention 12 mm or less FDC121 155KXZEN1 Single phase FDC121 155KXZES1 Three phase For M5 9 5 mm or less For M4 For M3 5 6 6 mm or less For cabling of the power source terminal block use crimp terminals of the figure shown below For cabling of the signal line terminal block use crimp terminals of the figure shown below Remote control wiring specifications Length m 1...

Page 134: ...1 B1 A2 B2 A1 B1 A2 B2 Summary of address setting methods figures in should be used with previous SL 1 Do not set numbers other than those shown in the table or an error may be generated Note When units supporting new SL are added to a network using previous SL such as one involving FD A KXE4 series units choose previous SL for the communication protocol and set addresses manually An outdoor unit ...

Page 135: ...red the 7 segment display panel indication will switch to AUX and start flickering STEP3 Automatic address setting completion check Indoor unit address determination When the indoor unit addresses are all set the 7 segment display panel indication will switch to AUE and start flickering If an error is detected in this process the display will show A Check the 7 segment display panel of each outdoo...

Page 136: ...ach outdoor unit STEP1 STEP2 STEP3 STEP4 Indoor unit 00 01 Indoor unit 01 01 Indoor unit 02 01 Indoor unit 00 04 Indoor unit 01 04 Indoor unit 02 04 Indoor unit 01 Indoor unit 02 Indoor unit 03 Indoor unit 02 Indoor unit 03 Indoor unit 04 Indoor unit 05 Indoor unit 06 Indoor unit 04 Indoor unit 05 Indoor unit 06 STEP1 STEP2 STEP3 STEP4 Outdoor unit 01 Start 01 Number 03 Start 04 Number 03 Outdoor ...

Page 137: ...ill increase or decrease by 1 upon pressing the or switch respectively After selecting an address press the Set switch Then the address of the indoor unit and outdoor unit are determined If you want to continue to change addresses return to step If you want to end the session and reflect new address settings In Step press the switch to select END If you have finished changing addresses press the S...

Page 138: ...mpleted normally Automatic address start Input starting address Specify a starting indoor unit address in automatic address setting The communication plotocol is displayed display only P33 Input number of connected indoor units Specify the number of indoor units connected in the refrigerant system in automatic address setting 0 Automatic address standby 1 Automatic address start 7 segment display ...

Page 139: ...CTRICAL WIRING WORK 3 Be sure to turn on the crank case heater 6 hours before operation 4 Make sure that the bottom of the compressor casing is warm Outdoor temperature 5 or more 5 Be sure to fully open the service valves liquid gas for the outdoor unit Operating the outdoor unit with the valves closed may damage the compressor 6 Check that the power to all indoor units has been turned on If not a...

Page 140: ...normal display Termination by error Error is displayed on the 7 segment indicator Correct the abnormal condition referring to the Check Point column and return SW3 5 to OFF Restart then the check operation from 2 a Transfer Use the instruction manual that came with the outdoor unit to explain the operation method to the customer Please ask the customer to keep this installation manual together wit...

Page 141: ...r CNNx or CNS CN20S on PCB in control box 3 Remove the coil of 4 way valve fixing screw and remove it mark 4 Remove welded part of 4 way valve by welding mark 4 To remove the low pressure sensor PSL 1 Remove the service panel See No 1 2 Disconnect the PSL connector CNLx or CNPS 5 To remove the electronic expansion valve EEV 1 o N e e S l e n a p e c i v r e s e h t e v o m e R 1 x o b l o r t n o c...

Page 142: ...ntrol PCB mark Pic 4 Remove 4 cotrol PCB fixing screws and remove it mark Pic 5 Pull off all the inserted connectors of inverter PCB Pic 6 Remove 4 inverter PCB fixing screws and remove it mark Pic 11 To remove the printed circuit board PCB Control box service front side type 1 Remove the service panel and top panel 2 Pull off all the inserted connectors of control PCB Pic 3 Take off 6 control PCB fixin...

Page 143: ...ee No 1 2 Pull off all the inserted connectors 3 Take off 6 fixing hooks and remove it 3 To remove the impeller and motor FM 1 Remove the lid of control box See No 1 4 To remove the drain pan 2 Disconnect the motor connector CNMx on PCB in control box 1 Remove the lid of control box See No 1 3 Remove 5 bellmouth fixing screws and remove it mark 2 Pull off all the inserted connectors 4 Remove the impell...

Page 144: ...d remove it mark 3 Remove 3 heat exchanger assembly fixing screws and remove it mark 8 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 7 2 Remove the coil of EEV by pull out on the top 3 Remove welded part of EEV by welding mark PROCEDURE PICTURES EEV Coil of EEV General view Pipe lid ...

Page 145: ...ark Control PCB 4 Take off 4 control PCB fixing locking supports and remove it mark 3 To remove the impeller and motor FM 1 Remove the lid of control box See No 1 4 To remove the drain pan 2 Disconnect the motor connector CNMx in the middle of wiring 1 Remove 2 plate fixing screws and remove it 3 Remove 4 bellmouth fixing screws and remove it mark mark 4 Remove the impeller fixing nut and remove it mar...

Page 146: ...remove it mark 3 Remove 3 heat exchanger assembly fixing screws and remove it mark 8 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 7 2 Remove the coil of EEV by pull out on the top 3 Remove welded part of EEV by welding mark PROCEDURE PICTURES EEV Coil of EEV General view Pipe lid ...

Page 147: ...s and remove it 2 To remove the printed circuit board PCB 1 Remove the lid of control box See No 1 2 Pull off all the inserted connectors Control PCB 3 Take off 4 control PCB fixing locking supports and remove it mark Power PCB 4 Take off 4 power PCB fixing locking supports and remove it mark 3 To remove the control box 1 Remove the lid of control box See No 1 2 Pull off all the inserted connectors 3 Re...

Page 148: ...the drain pan See No 5 2 Pull out the temperature sensor Thi R1 from the sensor holder 8 To remove the heat exchanger assembly 1 Remove the drain pan See No 5 2 Remove 2 pipe lid fixing screws and remove it mark 3 Remove 3 heat exchanger assembly fixing screws and remove it mark 9 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 8 2 Remove the coil of EEV by p...

Page 149: ...trol box See No 1 2 Pull off all the inserted connectors 3 Remove 3 control box fixing screws and remve it 4 Pull out the contorl box 3 To remove the printed circuit board PCB 1 Remove the lid of control box See No 1 2 Remove control box See No 2 3 Take off 6 PCB fixing locking supports and remove it 4 To remove the drain pan 1 Remove 2 plate fixing screws and remove it right anf left 2 Pull out the co...

Page 150: ... Disconnect the Tho R1 connector CNNx on PCB in control box 3 Remove the drain pan See No 4 4 Pull out the temperature sensor Thi R1 from the sensor holder 10 To remove the heat exchanger assembly 1 Remove the drain pan See No 3 2 Remove 3 pipe lid fixing screws and remove it mark 3 Remove 4 heat exchanger assy fixing screws and remove it mark 11 To remove the Electronic Expansion Valve EEV 1 Remove...

Page 151: ... the lid of control box See No 1 2 Pull off all the inserted connectors 3 Remove 2 control box fixing screws and remove it mark 3 To remove the drain pan 1 Remove 10 drain pan fixing screws and remove it mark 4 To remove the printed circuit board PCB 1 Remove the lid of control box See No 1 2 Pull off all the inserted connectors Control PCB 3 Take off 4 control PCB fixing locking supports and remove it ...

Page 152: ...x See No 1 2 Disconnect the Tho R1 connector CNNx on PCB in control box 3 Remove the drain pan See No 3 4 Pull out the temperature sensor Thi R1 from the sensor holder 9 To remove the heat exchanger assembly 1 Remove the drain pan See No 3 2 Remove 4 pipe lid fixing screws and remove it mark 3 Remove 4 heat exchanger assy fixing screws and remove it mark 10 To remove the electronic expansion Valve E...

Page 153: ...ts mark and remove it Power PCB 4 Take off 6 power PCB fixing locking supports mark and remove it 3 To remove the bottom panel B 1 Remove 18 panel fixing screws and remove it 5 To remove the motor PCB 4 To remove the impellers and motors FM 1 Remove the lid of control box 1 o N e e S 1 o N e e S x o b l o r t n o c f o d i l e h t e v o m e R 1 B l e n a p m o t t o b e h t e v o m e R 2 3 o N e e S ...

Page 154: ...the bottom panel B See No 3 2 Remove 22 bottom panel F fixing screws and remove it mark 3 Remove 2 drain pan fixing screws and remove it mark 4 Remove 4 heat exchanger assy fixing screws and remove it mark 9 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 8 2 Remove the coil of EEV by pull out on the top 3 Remove welded part of EEV by welding mark 10 To remove...

Page 155: ...he printed circuit board PCB 1 Remove 2 lid fixing screws and 1 Remove the lid of control box See No 1 s r o t c e n n o c d e t r e s n i e h t l l a f f o l l u P 2 t i e v o m e r Control PCB 3 To remove the bottom panel B 3 Take off 4 control PCB fixing locking supports and remove it mark 1 Remove 12 panel fixing screws Power PCB 4 t i e v o m e r d n a Take off 4 power PCB fixing locking supports a...

Page 156: ... 3 Disconnect the flot switch connector CNI on PCB in control box 4 Remove 4 drain pump assembly fixing screws and remove it mark 5 Pull a hose to the arrow direction and remove it 6 Remove 3 drain pump fixing screws and remove it mark 7 Remove the flot switch fixing screw and remove it mark 9 To remove the electronic expansion Valve EEV 1 Remove the heat exchanger assembly See No 7 2 Remove the coil o...

Page 157: ... control box See No 1 2 Pull off all the inserted connectors 3 Take off 6 control PCB fixing locking supports and remove it 3 To remove the bottom panel B and bottom panel F 1 Remove 12 bottom panel panel B fixing screws and remove it mark 2 Remove 10 bottom panel panel F fixing screws and remove it mark 4 To remove the drain pan 1 Remove the bottom panel B and bottom panel F See No 3 2 Pull out the co...

Page 158: ...ws and remove it mark 8 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 9 2 Remove the coil of EEV by pull out on the top 3 Remove welded part of EEV by welding mark 8 To remove the running capacitor of fan motor 1 Remove the running capacitor fixing screw and remove it PROCEDURE PICTURES Pipe lid Running Capacitor EEV Coil of EEV Genaral view ...

Page 159: ... 158 19 KX SM 318 ...

Page 160: ... 159 19 KX SM 318 Removing the Control the control toward right control and peripheral parts Screw ...

Page 161: ... 160 19 KX SM 318 ...

Page 162: ... 161 19 KX SM 318 ...

Page 163: ...ire fixing screws mark 3 Remove 4 air inlet grille fixing screws mark 2 To remove the lid of control box 1 To remove air inlet grille See No 1 2 Remove 2 wire fixing screws and remove it mark 3 Remove 2 lid fixing screws and remove it mark 3 To remove the control box 1 Remove the lid of control box See No 2 2 Pull off all the inserted connectors 3 Remove 2 control box fixing screws and remve it mark 4 P...

Page 164: ...y fixing screws and remove it mark 9 To remove the louver motor LM 1 Remove the lid of control box See No 1 2 Disconnect the louver motor connector CNJ on PCB in control box 10 To remove the temperature sensors example Thi R3 3 Remove side panel See No 5 1 Remove the lid of control box See No 1 4 Remove 2 louver motor fixing screws 2 Disconnect the Tho R3 connector CNNx x o b l o r t n o c n i B C P...

Page 165: ...and lid fixing screws and remove it mark 4 Pull the control box forward 2 To remove the lower flap motor LFM 1 Remove the control box See No 1 2 Disconnect the lower flap motor connector CNJ3 in the way of wiring 3 Remove the cover fixing screw and remove it mark 4 Remove 2 lower flap motor screws and remove it mark 3 To remove the upper flap motor UFM 1 Remove the control box See No 1 2 Disconnect the ...

Page 166: ...nd remove it mark 5 Remove 4 motor fixing bolts and remove it mark 6 Take off the hooks of cover and remove it 9 To remove the temperature sensors example Thi R1 1 Remove control box See No 1 2 Disconnect the Tho R1 connector CNN on PCB in control box 3 Pull out the temperature sensor Thi R1 from the sensor holder 10 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly S...

Page 167: ...t 2 To remove the printed circuit board PCB 1 Remove the lid of control box See No 1 2 Pull off all the inserted connectors 3 Take off 6 power PCB fixing locking supports and remove it 3 To remove the front panel FDFU 1 Remove 8 front panel fixing screws and remove it 4 To remove the impeller and motor FM 1 Remove the lid of control box See No 1 remove the front panel See No 3 2 Disconnect the motor c...

Page 168: ...panel Pic 6 Remove 4 screws on the right side panel and pull the heat exchanger assembly to the right Pic 7 To remove the running capacitor of fan motor 1 Remove the fan motor assembly See No 4 2 Remove faston terminal 3 Remove the running capacitor fixing screw and remove it 8 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 9 2 Remove the coil of EEV by pul...

Page 169: ... off all the inserted connectors 3 Take off 6 PCB fixing locking supports mark 3 To remove the drain pan 1 Remove 10 bottom panel fixing screws and remove it 2 Pull the drain pan and remove it 4 To remove the heat exchanger assembly 1 Remove the bottom panel See No 3 2 Remove 4 fixing screws on the attached plate of heat exchanger and remove it 5 To remove the drain pump DM and flot switch FS 1 Remove t...

Page 170: ...anti draft motor AM 1 Remove the corner lid See No 1 2 Remove 2 gear box fixing screws and remove it mark 1 To remove the corner lid 1 Remove the inlet grille 2 Remove the screw mark pull the corner lid toword the direction indicated by the arrow mark The four corner lids are the same way 2 To remove the louber motor LM 1 Remove the corner lid See No 1 2 Remove 2 louber motor fixing screws and remov...

Page 171: ...inuous improvement we reserve the right to make changes in all specifications without notice Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS LTD MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS LTD 16 5 Konan 2 chome Minato ku Tokyo 108 8215 Japan http www mhi mth co jp en ...