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Mitsubishi Heavy Industries 140KXZEN1, Service Manual, Page: 89 / 166

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Mitsubishi Heavy Industries 140KXZEN1 Service Manual Download Page 89

– 

87

 –

E30

E30

Unmatch connection of  

indoor and outdoor unit

Keeps flashing

Stays Off

Keeps flashing 1 time flash

1. Applicable model

5. Troubleshooting

Outdoor unit

Diagnosis

Countermeasure

Is

 the signal wire 

connection between 

indoor and outdoor units 

correctly ?

YES

NO

Is 

the voltage 

between L1-N at terminal 

block of indoor unit 

220/240V?

NO

Is the 

voltage 

between L1-N, 

L2-N and L3-N for 

3-phase model and L1-N for 

1-phase model at terminal 

brock of outdoor unit 

220/240V?

YES

YES

NO

Correct signal wiring.

Replace outdoor control 

PCB.

Disconnection of wire for 

power cable 

→ 

Correct it.

Replace indoor control 

PCB.

2. Error detection method

3. Condition of error displayed 

4. Presumable cause

• Faulty indoor control PCB 

• Faulty outdoor control PCB

Note: 

Error code

Remote control:

7-segment display: 

LED

Green

Red

Indoor

Outdoor

Content

 '17 • KX-SM-272

Summary of Contents for 140KXZEN1

Page 1: ...t pump type KXZ series FDC112KXZEN1 140KXZEN1 155KXZEN1 1 Phase FDC112KXZES1 140KXZES1 155KXZES1 3 Phase SERVICE MANUAL Note 1 Regarding the Indoor unit series refer to the No 15 KX T 247 17 KX T 254 and 17 KX T 264 Manual No 17 KX SM 272 updated March 08 2018 ...

Page 2: ...ol 9 1 4 Operation control function by the outdoor control 23 2 SYSTEM TROUBLESHOOTING PROCEDURE 53 2 1 Basics of troubleshooting 53 2 2 Explanation of troubleshooting 54 2 3 Contents of troubleshooting 55 2 4 Outdoor unit control PCB replacement procedure 109 3 ELECTRICAL WIRING 114 4 PIPING SYSTEM 116 5 INSTALLATION OF OUTDOOR UNIT 117 6 OUTDOOR UNIT DISASSEMBLY PROCEDURE 133 7 INDOOR UNIT DISAS...

Page 3: ...e changed LCD With backlight A tap on the LCD lights the backlight The 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 connecto...

Page 4: ...nt mode 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 li...

Page 5: ...en this is pressed once again it stops operating Used to swing the louver Every time this button is pressed displays switch as below Sets room temperature by pressing or button Sets time when setting the time Used to cancel the TIMER SETTINGS Used to reset the microcomputer Indicates the selected air flow volume Indicates when ON TIMER is set Indicates the ON TIMER setting time Nothing displayed w...

Page 6: ... 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 3 Power failure compensation function Electric power...

Page 7: ... Indoor 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 ...

Page 8: ... is done by the both factors of the set temp 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...

Page 9: ...ting 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 inp...

Page 10: ...de the state of stop is memorized Although the timer mode is cancelled at the recovery from power failure the setting of weekly timer is changed to the holiday setting for all weekdays b Operation mode c d 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 ...

Page 11: ...d so far as the thermostat is turned OFF 3 Timer operation a RC EX3 i Sleep timer Set the time from the start to stop of operation The time can be selected in the range from 30 to 240 minutes in the unit of 10 minute Note 1 Enable the Sleep timer setting from the remote control If the setting is enabled the timer operates at every time ii Set OFF timer by hour Set the time to stop the unit after o...

Page 12: ...et 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 Remote control display during the operation stop When the operation is stopped the power source is turned ON it displays preferentially the Room temperature Center Remote Filter sign Inspection and Timer operation 5 Hot start Cold draft prevention at heating a Operating condi...

Page 13: ...t operation a Control i When the indoor heat exchanger temperature detected with Thi R1 or R2 drops to 35 C or lower the speed of indoor fan is changed to the lower tap at 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 temp...

Page 14: ... auto swing or louver stop the louver takes the level position In order to prevent 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 fro...

Page 15: ...he heating thermostat is turned ON or the operation is changed to another mode including stop 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 Excep...

Page 16: ... thermostat of another indoor unit is turned ON after the compressor ON the thermostat is not turned OFF for 2 minutes after the compressor ON 1 OFF OFF 3 minutes delay Thermostat OFF in the condition of item 8 Compressor Indoor unit A Thermostat Indoor unit B Thermostat 11 Drain pump control a This control is operated when the inverter frequency is other than 0 rps during the cooling operation an...

Page 17: ...aintained during the drain detection 13 Operation check drain pump test run operation mode a If the power is turned on by the dip switch SW7 1 on the indoor 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 established...

Page 18: ...es after the initial detection for 6 minutes continuously stops again the return air temperature thermistor E7 the heat exchanger temperature thermistor E6 b Short circuit detection If the heat exchanger temperature thermistor detects 70 C or higher for 5 seconds continuously at 2 minutes and 20 seconds after the compressor ON during cooling operation the compressor stops E6 18 External input outp...

Page 19: ...us will be changed as follows i In case of Level input setting Factory default Input signal to CnT 6 or CnTA is OFF ON unit ON Input signal to CnT 6 or CnTA is ON OFF unit OFF Operation is not 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 CnT 6...

Page 20: ... key switch is ON CnT 6 or CnTA ON Operation permission start stop operation of the unit from the wired remote control becomes available When card key switch is OFF CnT 6 or CnTA OFF Operation prohibition the unit stops operation in conjunction with OFF signal and start stop operation of the unit from the wired remote control becomes not available 2 In case that Operation permission prohibition mo...

Page 21: ...tion prohibition Operation prohibition Operation permission Operation permission Operation permission Operation permission CnTA Operation stop pulse CnT Operation permission prohibition level Operation permission prohibition zone Actual operation Remote control CnT Operation stop pulse CnTA Operation permission prohibition level Operation permission prohibition zone Actual operation Remote control...

Page 22: ... Cooling heating selection the cooling heating is selected by the current operation mode During heating Set at the heating zone cooling prohibition zone During cooling dry auto and fan mode Set at cooling zone heating prohibition zone Heating Heating Heating Cooling Heating Cooling Cooling Note 1 Regarding the priority order for combinations of CnT and CnTA refer to Page 16 21 Room temperature det...

Page 23: ...operation RC EX3 only When the fan is used for circulation the unit is operated as follows depending on the setting with the remote control a If the invalid is selected with the remote control the fan is operated continuously during the fan operation normal fan mode b If the valid is selected with the remote control the fan is operated or stopped when on the difference of the remote control temper...

Page 24: ...mperature difference Alarm temperature difference is selectable between 5 to 10 C b If the following condition is satisfied or unit is stopped the signal is disappeared Cooling Dry Auto Cooling Indoor air temperature Set room temperature Alarm temperature difference 2 C Heating Auto Heating Indoor air temperature Set room temperature Alarm temperature difference 2 C 32 Peak cut timer RC EX3 only P...

Page 25: ... 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 FDC112KXZE1 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 Outdoor fan tap...

Page 26: ...fied when any of the following conditions is satisfied When the outdoor heat exchanger temperature sensed by Tho 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 dropp...

Page 27: ...And 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 spee...

Page 28: ...ower 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 temp 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 must be turned OFF ...

Page 29: ...ge 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 effect Extern...

Page 30: ...ays the operating conditions Operation conditions are transferred to option central control 4 When the control comand from remote control is not accepted Under the condition of the system all stop status by external input Center is dispalyed 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 input the p...

Page 31: ... SW4 8 demand switching 0 Open 1 Short circuit SW4 7 SW4 8 Compressor upper limit speed rps FDC112KXZEN 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 pulse input t...

Page 32: ...disregarded 1 Silent setting 0 1 Effective in zone A and B 2 Silent setting 2 3 Effective in zone B Note Silent setting 0 to 3 can be swiched by P05 of 7 segment display Valid zone B Valid zone A Invalid 27 29 31 Outdoor operation mode Heating Outdoor operation mode Cooling External temperature C Valid zone A Valid zone B Invalid 2 4 6 External temperature C b Control contents Contents of setting ...

Page 33: ...able 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 iii During al...

Page 34: ...it 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 mode unmatch m...

Page 35: ...are established both red LED and green LED on the outdoor PCB flash continuously 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...

Page 36: ...s 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 service valve is sh...

Page 37: ... stop by following resetting procedure 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 T...

Page 38: ...he 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 operation But...

Page 39: ...mperature CM2 L 31 136 1 C C09 Spare C10 Spare Tho C1 Under dome temperature CM1 L 5 90 1 C C11 Spare Tho C2 Under dome temperature CM2 L 5 90 1 C C12 Tho P1 Power transistor temperature CM1 L 5 136 1 C C13 Spare Tho P2 Power transistor temperature CM2 L 5 136 1 C C14 Tho SC Sub cooling coil temperature 1 L 18 73 1 C C15 Tho H Sub cooling coil temperature 2 L 25 73 1 C C16 Tho S Suction pipe tempe...

Page 40: ... 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 100h C45 Spa...

Page 41: ...y measurement 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 Ord...

Page 42: ...er 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 anomalous temperature...

Page 43: ...ow protection control ON time setting 30 Factory default 10 30 600 Sec 30 Changes like 10 30 60 90 600 P04 Demand ratio change value OFF Factory default OFF 000 040 060 080 0 OFF 1 0 2 40 3 60 4 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 9 1 P08 Spare Ex...

Page 44: ... Interlocked with P34 For operation error protection P36 Spare P37 Spare P38 Spare P39 Spare 1 Compressor stop cause definition of signal 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 temperature...

Page 45: ... 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 data Code No ...

Page 46: ...cted 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 1 22 FMo1 Act...

Page 47: ...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 SW3 5 0 OFF 1 ...

Page 48: ... 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 Spare 0 OFF 1...

Page 49: ...nting 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 of unit impl...

Page 50: ... 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 Normal 1 Impl...

Page 51: ...ontrol 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 priority 1 Last pus...

Page 52: ...7 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 operation normal end...

Page 53: ...atch 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 EEV check error...

Page 54: ...W4 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 FDC112KXZEN1 FDC112KXZES1 FDC140KXZEN1 FDC140KXZES1 FDC155KXZEN1 FDC155KXZ...

Page 55: ...ring etc Is the failure related 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 d...

Page 56: ...sure to wait for 3 minutes after turning the power circuit breaker off Disconnect the fan motor wires Both the power cable and control wires Turn the power circuit breaker OFF Wait 3 minutes Check whether DC15V between of CNI1 on the control PCB is detected Check E41 42 45 48 Connect the wires of fan motor 1 or 2 Power ON Test run switch ON If DC15V is detected primary check is completed Return to...

Page 57: ...g error 89 E36 E36 1 Discharge pipe temperature error Tho D1 System error 90 E36 3 Liquid flooding anomaly System error 91 E37 E37 1 2 E37 5 6 Outdoor heat exchanger and sub cooling coil temperature thermistor anomaly Thermistor wire breakage 92 E38 E38 Ambient air temperature thermistor anomaly Tho A Thermistor wire breakage 93 E39 E39 1 Discharge pipe temperature thermistor anomaly Tho D1 Thermi...

Page 58: ...difying 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 For th...

Page 59: ...ng operation from remote control Note 1 Outdoor 7ºC Indoor 20ºCDB 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 control re...

Page 60: ...esistance may drop to a few M Ω 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 leakage brea...

Page 61: ...ate 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 floor etc may be insufficient Review the installation place or apply reinforcement to increase the strength Check for leaning of installed unit or inc...

Page 62: ...ows through inside of piping of air conditioner It is 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...

Page 63: ...erant 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 d...

Page 64: ...es the louver operate at the power on YES NO YES NO Operate after waiting for more than 1 minute Repair wiring Indoor unit control PCB anomaly Replace it Replace LM Normal Replace louver motor If errors persist even after replacing the louver motor replace the indoor unit control PCB 2 Error detection method 3 Condition of error displayed 4 Presumable cause Defective LM LM wire breakage Indoor uni...

Page 65: ... 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 FDK Is resistance to FM LM and etc OK Note 1 Check the fuse at the power source side 1 2 Outdoor noise filter PCB anomaly Replace it Wrong wiring or broken wires between outdoor and indoor units Indoor unit PCB anomaly Replace it Replace FM...

Page 66: ...NW0 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 Tr㹇 Models other than shown at left Is DC18V or higher detected between Red Red CNW2 at the transformer secondary side Outdoor noise filter PCB anomaly Replace it Wrong wiring or broken wires between outdoor and indoor units Indoor unit ...

Page 67: ...measured voltage between 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...

Page 68: ...e Is 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 Tr㧵 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 Ind...

Page 69: ...t control PCB anomaly Replace it Indoor outdoor unit control PCB anomaly Replace it Remote control anomaly Replace it Breakage of wires for 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 Replace it 2 Error detection method 3 Condition of error displ...

Page 70: ...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 71: ...ndoor unit control PCB OK Is AC18V or higher is detected between Red Red at secondary side of indoor transformer 1 Is DC10 11V between X Y at indoor unit control PCB side when removing remote control Note 1 Model equipped with transformer Tr㹇 only Fuse blown Replace fuse Transformer anomaly Remote control wire short circuited Remote control anomaly Indoor unit control PCB anomaly Remote control an...

Page 72: ...en L1 L2 L2 L3 L3 L1 respectively at outdoor terminal block Is AC220 240V detected between L N at indoor terminal block NO NO NO NO NO YES YES YES YES YES YES A Refer next page WAIT Indoor unit control PCB anomaly Replace it Indoor control PCB anomaly Replace it Remote control anomaly Replace it Breakage of wires for remote control Replace it Correct the connecting wires between indoor and outdoor...

Page 73: ...omaly on outdoor fan motor Once turn OFF the breaker and turn ON it again at 3 minutes 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 Refer next page From previous page Normal Malfunction by temporary noise Replace noise filter Connect the connecting wire properly Correct connection In case of breakage of wire replace it...

Page 74: ...apacitor 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 NO NO NO NO NO B YES YES YES YES YES From previous page Replace fuse 2 Error detection method 3 Condition of error displayed 4 Presumable...

Page 75: ...d 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 Anomalous conn...

Page 76: ...r 3 minutes Connect the wire between indoor and outdoor units Reset power source 2 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 con...

Page 77: ...its Correct indoor unit address setting Implement test run Replace indoor control PCB Before replacement please 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 connected in the same superlink system Duplicated indoor unit address 3 Condition of error display...

Page 78: ...n the indoor unit OK YES NO Is the LED of indoor control PCB OK YES NO Is protective fuse for the super link circuit blown NO Does E3 E5 occurs YES YES YES NO NO Temporary malfunction by noise Identify and correct the source of noise Change to spare circuit Replace indoor control PCB Correct Correct Correct Replace outdoor control PCB 2 Error detection method No outdoor unit exists in the same Sup...

Page 79: ...imes flash on indoor red LED Repair signal wires Repair signal wires To the diagnosis of Checking indoor unit Unit is normal Malfunction by temporary noise etc Defective outdoor control PCB Defective network communication circuit Replace Unit is normal Malfunction by temporary noise etc 2 Error detection method When the communication between indoor outdoor units is disable for more than 2 minutes ...

Page 80: ...l PCB Replace Defective indoor heat exchanger temperature thermistor input circuit 2 Error detection method Anomalously low temperature or high temperature resistance is detected by the indoor heat exchanger thermistor Thi R1 R2 or R3 3 Condition of error displayed When the temperature thermistor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minutes delay the compre...

Page 81: ...fective intake air temperature thermistor input circuit 2 Error detection method Anomalously low temperature or high temperature resistance is detected by indoor intake air temperature thermistor Thi A 3 Condition of error displayed When the temperature sensor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minute delay the compressor starts again automatically but if...

Page 82: ...op OK NO YES NO YES NO Check float switch Check the connection of CNI If it is loose connect it securely Replace indoor control PCB Option check Correct setting to Humidifier DM interlock Check the wiring of drain motor Check drain motor Correct Check drain motor 2 Error detection method Float switch is activated 3 Condition of error displayed If the float switch OPEN is detected for 3 seconds con...

Page 83: ...7 indoor units connected to one remote control NO YES Defective remote control Replace Reduce to 16 or less units 2 Error detection method When it detects more than 17 of indoor units connected to one remote control 3 Condition of error displayed Same as above 4 Presumable cause Excessive number of connected units Defective remote control Note Error code Remote control 7 segment display LED Green ...

Page 84: ... Note Address setting method list Figures in are for old Superlink models Models for new Superlink protocol Models for old Superlink protocol Indoor unit address setting Outdoor unit address setting Indoor unit address setting Outdoor unit address setting Indoor unit No switch Outdoor unit No switch Outdoor unit No switch Indoor unit No switch Outdoor unit No switch Outdoor unit No switch Manual a...

Page 85: ...n motor If the error persists after replacing the fan motor replace the indoor 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 minutes continuously the compressor and the indoor fan motor stop After 2 seconds delay ...

Page 86: ...sts after replacing the fan motor replace indoor 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 minutes continuously the compressor and the indoor fan motor stop After 2 seconds delay it starts again automatically ...

Page 87: ...mable cause Mistake in SW7 1 setting Due to forgetting to turn OFF SW7 1 after indoor operation check Note Indoor operation check drain pump check mode If the power is ON after SW7 1ON indoor operation check drain pump check mode can be established 1 When the communication between remote control and indoor PCB is established 15 seconds after power ON it goes to indoor operation check 2 When the co...

Page 88: ... Even though the remote control thermistor is set to be valid the intake air temperature displayed on remote control for checking still shows the value detected by indoor intake air temperature thermistor not by remote control thermistor Resistance temperature characteristics of remote control temperature sensor Thc Temperature C Resistancevalue kΩ Temperature C Resistancevalue kΩ Temperature C Re...

Page 89: ...ndoor unit 220 240V NO Is the voltage between L1 N L2 N and L3 N for 3 phase model and L1 N for 1 phase model at terminal brock of outdoor unit 220 240V YES YES NO Correct signal wiring Replace outdoor control PCB Disconnection of wire for power cable Correct it Replace indoor control PCB 2 Error detection method 3 Condition of error displayed 4 Presumable cause Faulty indoor control PCB Faulty ou...

Page 90: ... recognized 2 Error detection method When it finds any duplicated 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 address setting of outdoor units More than 129 indoor units connected Ma...

Page 91: ...o persuade the customer why an improvement of power source is required by showing these data Propose an improvement to the customer Restart operation and check it as much as possible under the operating conditions for 30 minutes before error occurred Replace outdoor control PCB Wait and see without taking any action 2 Error detection method By Checking the power source voltage at input side of the...

Page 92: ...nsert connectors securely Check if characteristics are correct referring to the characteristics list of E39 Page 94 And if necessary replace the discharge pipe temperature thermistor 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 det...

Page 93: ...late the correct charging amount and reduce excessive refrigerant amount Connect the signal wires between indoor and outdoor units securely Insert the connector securely Replace the thermistor after checking whether the thermistor 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 possi...

Page 94: ...Check and save the data of operating 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 firmly Replace thermistor Replace outdoor control PCB 2 Error detection method Detection of anomalously low temperatures resistance by the outdo...

Page 95: ...s 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 firmly Replace ambient air temperature thermistor Tho A Replace outdoor control PCB 2 Error detection method Detection of anomalously low temperature resistance by ambient air temperature thermistor 3 Condition of error displaye...

Page 96: ... save the data of operating 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 short connector on CN17 firmly Insert the connector firmly Replace discharge pipe temperature thermistor Tho D1 Replace outdoor control PCB 2 Error detection metho...

Page 97: ... If it is defective replace high pressure sensor If the thermistor connector is defective or the thermistor wire is disconnected correct it Also check whether the high pressure switch is properly mounted or not Open service valve Restart operation and check it as much as possible under the operating conditions for 30 minutes before error occurred Replace outdoor control PCB Remove clogging Check i...

Page 98: ...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 specifications it makes the compressor stopping 3 Condition of error displayed If the output current of inveter exceeds the specifications it makes the compresso...

Page 99: ...ound on the compressor YES YES YES 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 specifications it makes the compressor s...

Page 100: ...or 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 addresses is wrong If the address corrected with rotary switch is still wrong replace control PCB Defective rotary switch Before replacement please confirm whether the rotary switch ...

Page 101: ...e normal Replace outdoor 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 FDC112 155KXZEN1 only Faulty power circuit of control PCB FDC112 155KXZEN1 only Connect the signal wires correctly Replace inverter PCB OK 2 Error detection method 3 Condition of error displayed If the ...

Page 102: ...ess setting is not damaged It was experienced that No 5 on rotary switch was not recognized And confirm too whether 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 of error displayed In case that the units with old and new Superlink systems are mixed ...

Page 103: ... 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 minute after the initial stop 4 Presumable cause Faulty outdoor control PCB Foreign material in rotation...

Page 104: ...nstracted on the label pasted on the pannel Check whether the service valve opened Correct low pressure sensor connector Replace low pressure sensor Replace outdoor control PCB Correct temperature thermistor connector Replace heat exchanger temperature thermistor Replace indoor control PCB Replace EEV coil Replace EEV main body or strainer Check for short circuit of air flow at indoor unit side an...

Page 105: ...ion Check the conditions whether it occurs 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 Insert the connector firmly Replace thermistor 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...

Page 106: ... the data of operating condition Check the conditions whether it occurs immediately after the power on or during operation or stopping Check also sensor value Insert connector securely and restart operation Temporary malfunction by noise Correct if source of noise is identified Replace sensor Replace outdoor control PCB 2 Error detection method Detection of anomalous voltage pressure Operating ran...

Page 107: ... it occurs immediately after the power on or during operation or stopping Check the sensor value as well Insert the connector firmly Replace power transistor temperature thermistor Tho P1 P2 Replace outdoor control PCB 2 Error detection method Detection of anomalously low temperature resistance of power transistor temperature sensor 3 Condition of error displayed If 10 C or lower is detected for 5...

Page 108: ...gerant is migrated in the refrigerant oil in the compressor Wait for about one hour under the condition of power ON and start again Keep on crankcase heater ON and evaporate the liquid refrigerant migrated in the compressor There is some possiblity that the model setting is wrong Check the dip switch of model setting 2 Error detection method When 7 segment LED E58 displayed 3 Condition of error di...

Page 109: ...circuit Repalce compressor Replace inverter PCB Replace inverter PCB Repalce compressor 2 Error detection method If it fails to change over to the 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 Fault...

Page 110: ...r on Replace indoor control PCB Change the remote control setting of Emergency Stop Invalid Check the cause of emergency stop It is better to have the data for 30 minutes before stopping when discussing with an installer 2 Error detection method If ON signal inputted to the CnT terminal of indoor control PCB 3 Condition of error displayed Same as above 4 Presumable cause Occurrence of emergency st...

Page 111: ...ted with the PCB before power distribution If the PCB is incorrectly replaced it will cause an electric shock or fire CAUTION 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...

Page 112: ...y a bundled of silicon grease first on the surface of power transistor Make 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 i...

Page 113: ...ply uniformly a bundled of silicon grease first on the surface of power transistor Make 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...

Page 114: ...ource voltage Model Switch FDC112KXZEN1 FDC140KXZEN1 FDC155KXZEN1 FDC112KXZES1 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 Switch Function SW...

Page 115: ...CB 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 following patter...

Page 116: ...l a v n o i s n a p x e c i n o 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 ...

Page 117: ...i m r e h T e p i p n o i t c u s r o t s i m r e h T d i u q i l l i o c g n i l o o c b u s r o t s i m r e h T s a g l i o c g n i l o o c b u s r o t s i m r e h T 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 ...

Page 118: ...switch 63H1 1 High pressure sensor PSH Check valve Oil separator Strainer Capillary tube Compressor Low pressure sensor PSL Thermistor Suction pipe Tho S Thermistor 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 Thermistor Entrance Thi A Thi R3 Thermistor Exit Thi R1 Heat...

Page 119: ...on 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 removed If air enters i...

Page 120: ...t 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 Mod...

Page 121: ...ith 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 112 140 155 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 both the inside ...

Page 122: ...ll 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 employed The pipe sh...

Page 123: ...ressure 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 keep the ser...

Page 124: ...t 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 volume recording ...

Page 125: ...o 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 supplies for the indoor and outdoor units c The power supplies 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 water pipe lightning...

Page 126: ...inal 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 component box are free of loose connector coupling or terminal connection Method of connecting power cables Model Power source Cable size for power source mm2 Wire length m R...

Page 127: ... outdoor units 1 2 Attention 12 mm or less FDC112 155KXZEN1 Single phase FDC112 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 100 to 200 to ...

Page 128: ... 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 No which is u...

Page 129: ...ment 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 outdoor unit Depend...

Page 130: ...it 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 unit 02 Outdoo...

Page 131: ...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 Set switch whi...

Page 132: ...ly Automatic address start Input starting address Specify a starting indoor unit address in automatic address setting The communication protocol 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 indication in ...

Page 133: ...NG WORK 3 Be sure to turn on the crankcase 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 failure may ...

Page 134: ... 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 with the user s m...

Page 135: ...oil of 4 way valve connector 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 on PCB in control box 1 Remove the service pane...

Page 136: ...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 fixing locking suppo...

Page 137: ...f 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 impeller fixing nu...

Page 138: ...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 17 KX SM 272 136 ...

Page 139: ...B 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 mark 2 Remov...

Page 140: ...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 17 KX SM 272 138 ...

Page 141: ...move 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 Remove 2 control bo...

Page 142: ...e No 5 2 Pull out the thermistor 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 pull out on the top 3 R...

Page 143: ...o 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 control box...

Page 144: ...o R1 connector CNNx on PCB in control box 3 Remove the drain pan See No 4 4 Pull out the thermistor 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 the heat exchanger asse...

Page 145: ...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 mark Power PCB 4 T...

Page 146: ...onnect the Tho R1 connector CNNx on PCB in control box 3 Remove the drain pan See No 3 4 Pull out the thermistor 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 EEV 1 Remove the heat ex...

Page 147: ... Take off 4 control PCB fixing locking supports 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 Remove the lid of control box See No 1 See No 1 2 Remove the bottom panel B See ...

Page 148: ...om 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 the ...

Page 149: ...printed circuit board PCB 1 Remove 2 lid fixing screws and 1 Remove the lid of control box See No 1 remove it 2 Pull off all the inserted connectors 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 and remove it 4 Take off 4 power PCB fixing locking supports and remove it mark 4 To remove the im...

Page 150: ...nect 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 of EE...

Page 151: ...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 contorl bo...

Page 152: ...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 17 KX SM 272 150 ...

Page 153: ... 17 KX SM 272 151 ...

Page 154: ... 17 KX SM 272 152 ...

Page 155: ... 17 KX SM 272 153 ...

Page 156: ... 17 KX SM 272 154 ...

Page 157: ...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 Pull out the control...

Page 158: ...ssy 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 thermistors 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 and remove it on PCB in control b...

Page 159: ...d 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 160: ...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 thermistors 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 thermistor Thi R1 from the sensor holder 10 To remove the Electronic Expansion Valve EEV 1 Remove the heat exchanger assembly See No 7 2 Remove the coi...

Page 161: ...e 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 connector...

Page 162: ...ve 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 pull out on the to...

Page 163: ...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 the lid ...

Page 164: ...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 remove it mark 1 To remov...

Page 165: ... 163 MEMO 17 KX SM 272 ...

Page 166: ...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 ...

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