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Daikin MKS-T Series, Service Manual

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Daikin MKS-T Series Service Manual Download Page 168

Troubleshooting for Outdoor Unit

SiSG121917E

163

Part 6 Service Diagnosis

Reference

Troubleshooting

In case of 

H9

, 

J3

, 

J6

, 

J8

, 

J9

H9

 : Outdoor temperature thermistor

J3

 : Discharge pipe thermistor

J6

 : Outdoor heat exchanger thermistor

J8

 : Liquid pipe thermistor

J9

 : Gas pipe thermistor

Check No.01

 Refer to P.169

(R23795)

Caution

NO

YES

NO

YES

Turn on the power again.

Normal?

Reconnect the connectors 
or thermistors.

J3

 error: The discharge 

pipe temperature is 
lower than the heat 
exchanger temperature.

Replace the defective 

thermistor

(s).

∗

 Outdoor temperature 

thermistor

∗

 Discharge pipe thermistor

∗

 Outdoor heat exchanger 

thermistor

∗

 Gas pipe thermistors

Cooling: Outdoor heat 

exchanger 
thermistor

Replace the outdoor unit 
PCB (main PCB).

Error displayed 

again on remote 

controller?

Check No. 01

Check the thermistor resistance 
value.

Be sure to turn off the power switch before connecting or disconnecting 
connectors, or parts may be damaged.

Summary of Contents for MKS-T Series

Page 1: ...Service Manual SiSG121917E Multi Split Type Air Conditioners MKS T MKB T Series Applied Models Inverter Multi Cooling Only...

Page 2: ...MG CTKB25 35 50TVMG 27 1 2 CTKS60 71TVMG CTKB60TVMG 29 1 3 FDKS25 35EAVMB FDKS25 35CAVMB FDKS50 60CVMB 32 1 4 FDMR50 60 71TVMG 34 2 Wireless Remote Controller Receiver 36 2 1 BRC086A2R1 for FDMR Serie...

Page 3: ...t Current Control 81 4 6 Freeze up Protection Control 82 4 7 Outdoor Fan Control 83 4 8 Liquid Compression Protection Function 83 4 9 Low Hz High Pressure Limit 84 4 10 Electronic Expansion Valve Cont...

Page 4: ...or on Outdoor Unit PCB 143 7 5 Unspecified Voltage Between Indoor Unit and Outdoor Unit Anti icing Function in Other Rooms 144 7 6 Anti icing Control for Indoor Unit 145 7 7 Outdoor Unit PCB Abnormali...

Page 5: ...Error Check Function 185 4 Trial Operation 187 4 1 Indoor Unit 187 4 2 Outdoor Unit 189 5 Field Settings 191 5 1 Wall Mounted and LSP Duct Type Indoor Unit 191 5 2 MSP Duct Type Indoor Unit 193 5 3 O...

Page 6: ...G121917E 1 Introduction 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 4 2 Icons Used 6 3 Revision History 7 Introducti...

Page 7: ...manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the p...

Page 8: ...nt system an excessively high pressure results causing equipment damage and injury Caution Do not repair electrical components with wet hands Working on the equipment with wet hands may cause an elect...

Page 9: ...ble at the connection terminals Improper connections may cause excessive heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or...

Page 10: ...fire Check to see if parts and wires are mounted and connected properly and if connections at the soldered or crimped terminals are secure Improper installation and connections may cause excessive he...

Page 11: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides...

Page 12: ...Revision History SiSG121917E 7 Introduction 3 Revision History Month Year Version Revised contents 09 2019 SiSG121917E First edition...

Page 13: ...SiSG121917E Part 1 General Information 8 1 Applicable Models 9 2 Functions 10 2 1 Indoor Unit 10 2 2 Outdoor Unit 14 Part 1 General Information...

Page 14: ...or Unit Outdoor Unit CTKS25TVMG CTKS35TVMG CTKS50TVMG CTKS60TVMG CTKS71TVMG CTKB25TVMG CTKB35TVMG CTKB50TVMG CTKB60TVMG FDKS25EAVMB FDKS35EAVMB FDKS25CAVMB FDKS35CAVMB FDKS50CVMB FDKS60CVMB FDMR50TVMG...

Page 15: ...z z 3 D airflow z z Wiring error check Comfort airflow mode z z Anti corrosion treatment of outdoor heat exchanger Comfort Control Switchable fan speed z z Auto fan speed z z Flexibility Multi split s...

Page 16: ...Wiring error check Comfort airflow mode z z Anti corrosion treatment of outdoor heat exchanger Comfort Control Switchable fan speed z z Auto fan speed z z Flexibility Multi split split type compatible...

Page 17: ...ring error check 3 D airflow Anti corrosion treatment of outdoor heat exchanger Comfort airflow mode Comfort Control Switchable fan speed z z Flexibility Multi split split type compatible indoor unit...

Page 18: ...programmed z 3 D airflow Worry Free Reliability Durability Auto restart after power failure z z Comfort airflow mode Self diagnosis wit remo con z z Comfort Control Switchable fan speed 3 steps z z Wi...

Page 19: ...t of outdoor heat exchanger fins z 3 D airflow Comfort airflow mode Protection net z Comfort Control Comfortable auto fan speed Stabiliser free Auto fan speed Low high voltage shield Switchable fan sp...

Page 20: ...eat exchanger fins z 3 D airflow Comfort airflow mode Protection net z Comfort Control Comfortable auto fan speed Stabiliser free Auto fan speed Low high voltage shield Switchable fan speed Flexibilit...

Page 21: ...SiSG121917E Part 2 Specifications 16 1 Indoor Unit 17 1 1 Wall Mounted Type 17 1 2 LSP Duct Connected Type 20 1 3 MSP Duct Connected Type 22 2 Outdoor Unit 23 Part 2 Specifications...

Page 22: ...lation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 16 16 Drawing No 3D122913 3D122914 Model CTKS50TVMG CTKS60TVMG Capacity 5 0 kW Cl...

Page 23: ...n Control Right Left Horizontal Downwards Air Filter Removable Washable Mildew Proof Running Current Rated A 0 59 Power Consumption Rated W 70 Power Factor Rated 51 6 Temperature Control Microcomputer...

Page 24: ...and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm 6 4 6 4 Gas mm 9 5 9 5 Drain mm 16 16 Drawing No 3D122913 3D122914 Model CTKB50TVMG CTKB60TVMG Capacity 5 0 kW Class 6 0 kW Class F...

Page 25: ...Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 200 700 620 200 700 620 Packaged Dimensions H W D mm 274 906 751 274 906 751 Weight Mass kg 21 21 Gross Weight Gros...

Page 26: ...Running Current Rated A 0 64 0 74 Power Consumption Rated W 140 160 Power Factor Rated 95 1 94 0 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 200 900 620 200 1 1...

Page 27: ...ture Control Dimensions H W D mm 245 1 000 800 245 1 000 800 Packaged Dimensions H W D mm Weight Mass kg 35 37 Gross Weight Gross Mass kg Sound Pressure Level dB A 34 35 Heat Insulation Piping Connect...

Page 28: ...Current A Dimensions H W D mm 695 930 350 695 930 350 Packaged Dimensions H W D mm 762 1 004 475 762 1 004 475 Weight Mass kg 52 52 Gross Weight Gross Mass kg 58 58 Sound Pressure Level dB A 54 54 Pip...

Page 29: ...t A Dimensions H W D mm 695 930 350 990 940 320 Packaged Dimensions H W D mm 762 1 004 475 1 114 1 003 425 Weight Mass kg 52 83 Gross Weight Gross Mass kg 58 95 Sound Pressure Level dB A 54 53 Piping...

Page 30: ...A Dimensions H W D mm 695 930 350 695 930 350 Packaged Dimensions H W D mm 762 1 004 475 762 1 004 475 Weight Mass kg 52 52 Gross Weight Gross Mass kg 58 58 Sound Pressure Level dB A 54 54 Piping Con...

Page 31: ...60CVMB 32 1 4 FDMR50 60 71TVMG 34 2 Wireless Remote Controller Receiver 36 2 1 BRC086A2R1 for FDMR Series 36 3 Wired Remote Controller 37 3 1 BRC1E63 for FDMR Series 37 4 Outdoor Unit 38 4 1 MKS50 65...

Page 32: ...m 1 S6 Connector for swing motor horizontal blade 2 S11 Connector for swing motor vertical blade 3 S26 Connector for display signal receiver PCB A2P INTELLIGENT EYE sensor PCB A3P 4 S32 Connector for...

Page 33: ...renthesis are the names on the appropriate wiring diagram 1 S27 Connector for control PCB A1P 2 SW1 BS1 S1W Indoor unit ON OFF switch 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow...

Page 34: ...E sensor PCB A4P 2 S6 Connector for swing motor horizontal blade 3 S11 Connector for swing motor vertical blade 4 S26 Connector for display signal receiver PCB A3P 5 S32 Connector for indoor heat exch...

Page 35: ...r terminal strip 2 S800 Connector for control PCB A2P 3 FG HE Connector for earth wire 4 FU1 F1U Fuse 3 15 A 250 V 5 V2 R2V Varistor 3P406709 1 FG S800 V2 FU1 HE S100 1 S27 Connector for control PCB A...

Page 36: ...Indoor Unit SiSG121917E 31 Part 3 Printed Circuit Board Connector Wiring Diagram INTELLIGENT EYE Sensor PCB A4P PCB4 1 S36 Connector for control PCB A2P S36 3P227885 1...

Page 37: ...r AC fan motor Hall IC 3 S21 Connector for centralized control HA 4 S26 Connector for display signal receiver PCB PCB2 5 S32 Connector for indoor heat exchanger thermistor R2T 6 H1 H2 H3 Connector for...

Page 38: ...he symbols in the parenthesis are the names on the appropriate wiring diagram 1 S1 Connector for control PCB PCB1 2 SW1 S1W Indoor unit ON OFF switch 3 LED1 H1P LED for option red 4 LED2 H2P LED for t...

Page 39: ...stor 4 X25A Connector for drain pump motor 5 X27A Connector for terminal block for power supply 6 X28A Connector for power supply wiring for option 7 X30A Connector for terminal block for wired remote...

Page 40: ...is are the names on the appropriate wiring diagram 1 X3A Connector for control PCB A1P 2 X6A Connector for reactor 3 X8A Connector for indoor fan motor 4 X10A Connector for terminal block for power su...

Page 41: ...gram 36 2 Wireless Remote Controller Receiver 2 1 BRC086A2R1 for FDMR Series Display Signal Receiver PCB 1 SS1 MAIN SUB setting switch Refer to page 198 for details 2 SS2 Address setting switch Refer...

Page 42: ...17E 37 Part 3 Printed Circuit Board Connector Wiring Diagram 3 Wired Remote Controller 3 1 BRC1E63 for FDMR Series Wired Remote Controller PCB 1 P1 P2 Terminal for indoor unit 2 R1T Room temperature t...

Page 43: ...oil D port 65 80 class only 6 S40 Connector for overload protector 7 S70 Connector for outdoor fan motor 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe tempe...

Page 44: ...1 LED2 LED3 LED4 LED5 LED for service monitor red 4 SW1 Forced cooling operation ON OFF switch Refer to page 183 for details 5 SW2 Operation mode switch Refer to page 183 for details 6 SW3 Wiring erro...

Page 45: ...ort 7 S40 Connector for overload protector 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 S92 Connector for gas pipe thermistor 10 S93 Connector for liquid...

Page 46: ...ter PCB PCB2 1 S70 Connector for outdoor fan motor 2 S401 S411 Connector for main PCB PCB1 3 HL402 HN402 Connector for main PCB PCB1 4 DCP2 DCM2 Connector for main PCB PCB1 5 FU2 Fuse 3 15 A 250 V 6 U...

Page 47: ...D4 LED5 LED for service monitor red 4 SW1 Forced cooling operation ON OFF switch Refer to page 183 for details 5 SW2 Operation mode switch Refer to page 183 for details 6 SW3 Wiring error check switch...

Page 48: ...cessory for CTKS series optional for CTKB series 5 2 BRP067A42 BRP980B42 Remote Control PC board Set Adaptor PCB Standard accessory for CTKS series optional for CTKB series 1 Connector Connector for a...

Page 49: ...Other Functions 63 2 MSP Duct Type Functions 64 2 1 Drain Pump Control 64 2 2 Thermostat Sensor in Wired Remote Controller 66 2 3 Freeze Prevention Control 67 2 4 Clock and Calendar Setting 68 2 5 Sc...

Page 50: ...ncy Principle Control Parameters The frequency of the compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor...

Page 51: ...gy saving cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the maximum fr...

Page 52: ...table explains the auto swing process for cooling dry and fan 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room When the...

Page 53: ...Unit Outline Phase control and fan speed control contains 9 steps LLL LL SL L ML M MH H and HH The airflow rate can be automatically controlled depending on the difference between the room thermistor...

Page 54: ...is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Thermostat turns on also when the room tempera...

Page 55: ...time Cooling 10 minutes Dry 450 seconds Cooling Dry 1 8 NIGHT SET Mode Outline When the OFF TIMER is set NIGHT SET mode is automatically activated NIGHT SET mode keeps the airflow rate setting Detail...

Page 56: ...OME LEAVE Operation Applicable Models FDKS25 35EAVMB FDKS25 35CAVMB FDKS50 60CVMB Outline HOME LEAVE operation is a function that allows you to record your preferred set temperature and airflow rate Y...

Page 57: ...djust the airflow rate with the FAN setting button as you like HOME LEAVE operation will run with these settings the next time you start HOME LEAVE operation To change the recorded information repeat...

Page 58: ...60 rpm when no one is in the area When there is no signal from the motion sensor in 20 minutes the microcomputer judges that nobody is in the room and operates the unit at a temperature shifted from t...

Page 59: ...extent the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency Details When POWERFUL button is pressed the fan speed and target temperature are co...

Page 60: ...t or Select button to set the clock to the current day of the week 3 Press Clock button blinks 4 Press Select or Select button to set the clock to the present time Holding down Select or Select button...

Page 61: ...taking the following steps 1 Press CLOCK button is displayed and blinks 2 Press TIMER or TIMER button to adjust the clock to the present time Holding down TIMER or TIMER button rapidly increases or de...

Page 62: ...F OFF ON OFF OFF ON Program 1 Program 2 Program 3 Program 4 Up to 4 reservations per day and 28 reservations per week can be set using the WEEKLY TIMER The effective use of the copy mode simplifies ti...

Page 63: ...Press to select the desired day of the week and reservation number Pressing changes the reservation number and the day of the week 3 Press The day of the week and reservation number will be set and b...

Page 64: ...p appears on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights orange Display A reservation made once can be easily copied and the same settings used for another day of the week Re...

Page 65: ...nation day of the week 5 Press The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the settings to o...

Page 66: ...Press appears on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights orange Display To deactivate WEEKLY TIMER operation s s e r P while is displayed on the LCD disappears from the...

Page 67: ...ill other reservations WEEKLY TIMER operation will be activated Reservations for each day of the week This function can be used for deleting reservations for each day of the week It can be used while...

Page 68: ...sing or the battery has run out The operation mode refers to the following table In the case of multi system operation there are times when the unit does not activate with ON OFF switch 1 15 3 Auto re...

Page 69: ...the thermostat turns OFF the drain pump continues to operate for another 5 minutes Notes 1 If the float switch turns ON again during the residual operation of the drain pump cooling operation also tur...

Page 70: ...ltaneously Notes 1 If the float switch continues to turn OFF and ON 5 times consecutively it is judged as a drain system error and the error code AF is displayed on the remote controller 2 The drain p...

Page 71: ...ction temperature has changed from 18 C to 30 C A F This example also assumes there are several other air conditioners and the suction temperature changes even when the thermostat sensor is off Body t...

Page 72: ...ce with the following conditions and is also set in accordance with the conditions given below Details Conditions for starting Temperature is 1 C or less for total of 40 min or temperature is 5 C or l...

Page 73: ...inuously Operation 4 Date Time Year 2013 Month 04 Day 04 Thursday 0 00 Return Setting Select Day with buttons Change the day with buttons Holding down the button causes the number to change continuous...

Page 74: ...ar screen Press buttons to select 12H 24H Clock Press Menu Enter button to display the 12H 24H Clock screen 2 12H 24H Clock 24H Return Setting By default the time display is set to the 24H format Pres...

Page 75: ...0 Return Setting Before setting the schedule the clock must be set If the clock has not been set a screen like the one on the left will appear Press buttons to select Yes and press Menu Enter button T...

Page 76: ...to make the holiday settings Press buttons to switch the setting between set and release Multiple days can be selected as holidays Note To enable the schedule timer for the day selected as a holiday...

Page 77: ...press buttons to set the desired time Each press of buttons moves the numbers by 1 hour or 1 minute 4 Schedule nr 1 Mon Time Act Cool Heat 6 00 Return Setting Schedule nr 1 Mon Time Act Cool Heat 6 00...

Page 78: ...he contents for Monday are copied by pressing the Mode Selector button after selecting Tuesday 6 Save the settings Schedule Yes No Return Setting Press buttons to select Yes Press the Menu Enter butto...

Page 79: ...ver of the indoor unit Start Press emergency operation switch The indoor unit runs in the previous operation mode The system operates with the previously set fan speed Stop Press emergency operation s...

Page 80: ...discharge pipe temperature can be obtained In cooling operation the outdoor heat exchanger thermistor is used for detecting the disconnection of the discharge pipe thermistor When the discharge pipe t...

Page 81: ...hat the target discharge pipe temperature can be obtained In cooling operation the indoor heat exchanger thermistor is used for freeze up protection control If the indoor heat exchanger temperature dr...

Page 82: ...ls The compressor s frequency is determined by taking the following steps 1 Determine command frequency Command frequency is determined in the following order of priority 1 Forced cooling 2 Indoor fre...

Page 83: ...ompressor or when conditions are varied due to a change of operating rooms the frequency must be initialized according to the total of the maximum D value of each room and the total Q value Q of the o...

Page 84: ...ne room or when the outdoor unit quiet operation commands come from all the rooms the upper limit frequency is lower than the usual setting 4 3 Controls at Mode Changing Start up 4 3 1 3 Minute Standb...

Page 85: ...pper limit of frequency is set to keep the discharge pipe temperature from rising further Details Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone T...

Page 86: ...limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum f...

Page 87: ...ze up protection control starts the compressor stops the airflow rate is fixed to L tap and the drain pump turns ON Conditions for starting and ending are as below Starting conditions The freeze up pr...

Page 88: ...cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 5 Fan speed control for POWERFUL operation The rotation speed of the outdoor fan is increase...

Page 89: ...Pressure equalizing control Room Distribution Control 1 Gas pipe isothermal control 2 Dew prevention control for indoor rotor Open Control 1 Electronic expansion valve control when starting operation...

Page 90: ...Operation Room The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 4 10 5 Control when the Frequency Changes When the tar...

Page 91: ...onnection is ascertained the compressor continues operation for 9 minutes and then stops If the compressor stops repeatedly the system is shut down 4 10 8 Gas Pipe Isothermal Control During Cooling Wh...

Page 92: ...emperature exceeds 130 C the compressor stops 4 11 3 Refrigerant Shortage Control Outline Detecting by power consumption If the power consumption is below the specified value and the frequency is high...

Page 93: ...SiSG121917E Part 5 Remote Controller 88 1 Applicable Remote Controller 89 2 ARC466A19 90 3 ARC433B76 92 4 BRC086A22 94 5 BRC1E63 96 Part 5 Remote Controller...

Page 94: ...Item Category Installation Operation Manual URL https global1d daikin com business_portal login Series Model Name Wireless Remote Controller Reference Page Wired Remote Controller Reference Page CTKS...

Page 95: ...aim the transmitter at the indoor unit If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate Do not drop the remote controller Do...

Page 96: ...gain to complete TIMER setting R25261 OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time Priorit...

Page 97: ...Press this button to start HOME LEAVE operation The HOME LEAVE lamp lights up POWERFUL 2 button Starts POWERFUL operation ON OFF button Press this button once to start operation Press once again to st...

Page 98: ...ess this button and adjust the time with TIMER setting button Press this button again to complete TIMER setting OFF TIMER button Press this button and adjust the time with TIMER setting button Press t...

Page 99: ...SiSG121917E BRC086A22 Part 5 Remote Controller 94 4 BRC086A22 13 2 6 1 3 7 8 12 10 9 11 4 5 18 14 19 17 20 15 16 23 24 26 21 25 22 FDMR Series...

Page 100: ...2 BACKLIGHT BUTTON Press this button to turn the backlight on or off 13 SIGNALTRANSMITTER This sends the signals to the indoor unit 14 PROGRAMMINGTIMER BUTTON Use this button for programming START and...

Page 101: ...mote Controller 96 5 BRC1E63 2 3 Menu Enter button 8 ON OFF button 10 Cancel button 9 Operation lamp Green 11 LCD with backlight 4 Up button 5 Down button 6 Right button 7 Left button 1 Mode Selector...

Page 102: ...hlight the item below the current selection The highlighted items will be scrolled continuously when the button is kept pressed Used to change the item selected Be sure to press the part with the symb...

Page 103: ...t 35 C 10 C Setback Fri 11 03 14 Selectable Display Item with room temperature selected 13 Clock 12 24 hours time display Detailed display example 1 4 Set Setback Temperature display Auto Cool Heat 28...

Page 104: ...itioner is turned off Setback indicates the setback temperatures that are set for the air conditioner Displayed when a Heat Reclaim Ventilator is connected For details refer to the Operation Manual of...

Page 105: ...prohibited Changeover Under Control VRV only Displayed if the remote controller has no cool heat selection eligibility The setback icon blinks when the air conditioner is turned on under the setback c...

Page 106: ...6 1 Indoor Unit PCB Abnormality 127 6 2 Drain Water Level Control System Abnormality 128 6 3 Indoor Fan Motor or Related Abnormality 129 6 4 Fan PCB Abnormality 131 6 5 Drain System Abnormality 132 6...

Page 107: ...Box Temperature Rise 164 7 20 Radiation Fin Temperature Rise 165 7 21 Output Overcurrent Detection 167 8 Check 169 8 1 Thermistor Resistance Check 169 8 2 Indoor Fan Motor Connector Check 170 8 3 Hal...

Page 108: ...of the operation limit Check the reference page for the operation limit 218 Diagnose with remote controller indication 114 Some indoor units do not operate Check the type of the indoor units Check if...

Page 109: ...lowing errors is detected 1 A protection device of the indoor or outdoor unit is activated or the thermistor malfunctions 2 A signal transmission error occurs between the indoor and outdoor units In e...

Page 110: ...n the operation mode is automatic set all the indoor unit operation mode as cooling or heating and check again if the operation lamp is normal If the lamp stops blinking after the above steps there is...

Page 111: ...he microcomputer works in order the LED A blinks and when the system is in normal condition the red LEDs are OFF Even after the error is canceled and the unit operates in normal condition the LED indi...

Page 112: ...wo consecutive beeps indicate non corresponding codes 2 To return to the normal mode hold Timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also ret...

Page 113: ...emp button 3 Press Mode button to enter the service check mode R6000649 The left side number blinks R6000111 4 Press Temp or Temp button and change the number until you hear the two consecutive beeps...

Page 114: ...00650 8 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number doe...

Page 115: ...consecutive beeps indicate non corresponding codes 2 To return to the normal mode hold TIMER CANCEL button down for 5 seconds When the remote controller is left untouched for 60 seconds it also return...

Page 116: ...long beep 3 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number...

Page 117: ...Long beep Both the left side and right side numbers correspond with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Refer to Error codes...

Page 118: ...button 0 on the right hand of the malfunction code blinks 6 Press PROGRAMMING TIMER button and change the malfunction code Press until the indoor unit makes a long beep The malfunction code is fixed...

Page 119: ...ure thermistor or related abnormality 123 U4 Signal transmission error between indoor unit and outdoor unit 124 UA Unspecified voltage between indoor unit and outdoor unit 126 Error Codes Description...

Page 120: ...h h i h U2 Low voltage detection or over voltage detection 140 j h i h h h U3 Wiring Error Check Unexecuted 142 j h i i i h U7 Signal transmission error on outdoor unit PCB 143 j i h i i h A5 Anti ici...

Page 121: ...t 5 1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit Error Decision Conditions The syst...

Page 122: ...YES NO NO YES NO NO YES Caution To secure the connection disconnect the connectors once and then reconnect YES NO YES NO YES NO YES Match the compatible models Correct the power supply Replace the in...

Page 123: ...t Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 169 NO NO NO Check No 01 Check the indoor h...

Page 124: ...power supply voltage Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective indoor unit PCB...

Page 125: ...wn or short circuit Check the motor control voltage Check the indoor unit PCB for rotation pulse Fan rotates smoothly Resistance OK Is the motor control voltage 15 VDC generated Replace the indoor fan...

Page 126: ...ation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed...

Page 127: ...PCB Replace the fan motor Replace the indoor unit PCB control PCB Replace the fan motor Replace the capacitor Replace the indoor unit PCB control PCB Replace the fan motor Replace the indoor unit PCB...

Page 128: ...r more or 0 04 V or less with the power on Supposed Causes Disconnection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C4 Indoor heat exchanger thermistor C9 Room tempe...

Page 129: ...s checked whether it is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out...

Page 130: ...wires between the indoor unit and the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is t...

Page 131: ...ted Supposed Causes Wrong models interconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting...

Page 132: ...t power It can be erased either within the computer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but wr...

Page 133: ...er to page 34 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Connect the drain pump Replace the indoor unit PCB control PCB Replace...

Page 134: ...the fan PCB Defective fan PCB Defective fan motor No fuse continuity Trouble Shooting Connect the connector correctly Turn OFF the power supply and wait for 10 minutes NO Turn ON the power supply whil...

Page 135: ...es Turn OFF the power supply and wait for 10 minutes NO NO Replace the fan motor Each resistance between the pins is equal to or lower than 1 Replace the fan motor Replace the fan PCB A2P The HAP lamp...

Page 136: ...onnecting or disconnecting connectors or parts may be damaged Check for the indoor unit control PCB A1P and the fan PCB A2P Connect the connector correctly NO YES YES Is the connector X3A on the fan P...

Page 137: ...llation Defective float switch Defective indoor unit PCB Troubleshooting YES YES NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damage...

Page 138: ...e checked prior to changing the indoor unit PCB To check the thermistors proceed as follows 1 Disconnect the thermistor from the indoor unit PCB 2 Read the temperature and the resistance value 3 Check...

Page 139: ...ns The remote controller thermistor is disconnected or shorted while the unit is running Supposed Causes Defective thermistor Broken wire Troubleshooting To delete the record of error codes press ON O...

Page 140: ...caused by noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is SS1 of both remote controllers set to MAIN NO NO...

Page 141: ...g 1 remote controller Connection of 2 SUB remote controllers when using 2 remote controllers Defective remote controller PCB Troubleshooting Is SS1 of remote controller PCB set to SUB Turn the power o...

Page 142: ...mote controller correctly YES YES NO YES Remove the jumper NO YES Set the field setting correctly YES NO NO NO Blink R22125 Is the remote controller connected to one or more indoor units Is the remote...

Page 143: ...nditions Refrigerant shortage detection The following conditions continue for 7 minutes Input current A output frequency B Output frequency C If the error repeats the system is shut down Reset conditi...

Page 144: ...top valve Repair the pipe flare or replace the union Check the pipes for improper contact and correct them as required Replace the cracked pipe Check the power transistor harness for loosening Correct...

Page 145: ...it is below 196 V for 0 1 second If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Over voltage detection An over voltage signal...

Page 146: ...the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off...

Page 147: ...r check after the memory was cleared Supposed Causes The wiring error switch SW3 may have been pressed for 10 seconds or more and the memory may have been deleted The unit cannot be operated unless wi...

Page 148: ...data sent from the PM1 can not be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting...

Page 149: ...d outdoor units Supposed Causes Anti icing function in other rooms Power supply voltage is not as specified Wrong models interconnected Wrong indoor unit PCB or outdoor unit PCB mounted Troubleshootin...

Page 150: ...rmistor that are located in a shut down room Error Decision Conditions In cooling operation the both conditions A and B are met for 5 minutes A Room temperature Indoor heat exchanger temperature 10 C...

Page 151: ...e or coil Replace the outdoor heat exchanger thermistor Replace the room temperature thermistor Replace the room temperature thermistor or indoor heat exchanger thermistor Do the vacuum drying Replace...

Page 152: ...is in abnormal running order Supposed Causes Defective outdoor unit PCB Noise Momentary drop of voltage Momentary power failure Troubleshooting R21809 Caution Be sure to turn off the power switch bef...

Page 153: ...Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective...

Page 154: ...the electronic expansion valve or the coil Discharge pipe thermistor disconnected Check No 12 Check the electronic expansion valve Replace the OL Q1L Replace the OL harness Connect the connector S40...

Page 155: ...pansion valve Troubleshooting Check No 12 Refer to P 172 Check No 15 Refer to P 173 Turn off the power Disconnect the harnesses U V and W R21163 Caution NO YES YES NO NO YES Check No 15 Check with the...

Page 156: ...ed Causes Disconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 175 R20416 Caution YES YES NO YES NO NO Y...

Page 157: ...fer to P 176 Check No 18 Refer to P 176 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong in...

Page 158: ...heat exchanger thermistor or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB...

Page 159: ...expansion valve or coil Defective outdoor heat exchanger thermistor Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 169 Check No 12 Refer to P 172 R20418 Caution Replace the outdoor...

Page 160: ...Troubleshooting for Outdoor Unit SiSG121917E 155 Part 6 Service Diagnosis Reference Reference Reference Check No 17 Refer to P 176 Check No 18 Refer to P 176 Check No 19 Refer to P 177...

Page 161: ...rced cooling operation Supposed Causes Abnormal operation due to air intrusion Defective discharge pipe thermistor Troubleshooting Check No 01 Refer to P 169 YES R23655 NO OK NG Caution Replace the ou...

Page 162: ...onnect the reactor properly R20419 NO YES Connect the compressor properly NO YES Replace the reactor NO YES Replace the compressor or the compressor relay harness Restart the operation again and if th...

Page 163: ...Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage is outside the specified range Troubl...

Page 164: ...Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoo...

Page 165: ...ressor running frequency and CT detected input current Error Decision Conditions The compressor running frequency is more than A Hz and input current is less than B A If the error repeats the system i...

Page 166: ...r again and restart operation Check No 15 Check with the inverter analyzer Inverter analyzer RSUK0917C 100 50 Voltage within the allowable range Power supply voltage 15 Replace the outdoor unit PCB ma...

Page 167: ...s of the thermistor is above 4 96 V or below 0 04 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature The system is shut down if all t...

Page 168: ...rmal Reconnect the connectors or thermistors J3 error The discharge pipe temperature is lower than the heat exchanger temperature Replace the defective thermistor s Outdoor temperature thermistor Disc...

Page 169: ...thermistor Disconnection of connector Defective outdoor unit PCB Troubleshooting Check No 17 Refer to P 176 Check No 19 Refer to P 177 A C B C C C 50 65 80 class 90 70 80 90 class 110 75 88 Caution WA...

Page 170: ...onnector Defective outdoor unit PCB Silicone grease is not applied properly on the radiation fin after replacing the outdoor unit PCB Troubleshooting Check No 17 Refer to P 176 A C B C 50 65 80 class...

Page 171: ...SiSG121917E Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 166 Reference Note Check No 19 Refer to P 177 Refer to Silicone Grease on Power Transistor Diode Bridge on page 203 for details...

Page 172: ...utdoor unit PCB Defective compressor Troubleshooting R24911 Caution NO YES NO YES An output overcurrent may result from wrong internal wiring If the system is interrupted by an output overcurrent afte...

Page 173: ...connect the harnesses Turn on the power again and start operation Check the power supply voltage Check the power module Correct the power supply Replace the compressor Correct the power supply or repl...

Page 174: ...hermistor as ASSY Multimeter Resistance range Thermistor ASSY Soldered thermistor Multimeter Thermistor temperature C Type A Type B R 25 C 20 k B 3950 K R 25 C 10 k B 3435 K 20 197 8 73 4 15 148 2 57...

Page 175: ...een the pins 2 3 Rotation pulse check 1 Check the connector for connection 2 Turn the power on and stop the operation 3 Check if the Hall IC generates the rotation pulse 4 times when the fan motor is...

Page 176: ...ector connected check the following 1 Output voltage of about 5 V between pins 1 and 3 2 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating If NG in step 1 Defective PCB Repla...

Page 177: ...re is no continuity between the pins the EV coil is faulty 4 If no EV generates latching sound in the step 2 above the outdoor unit PCB is faulty 5 If the continuity is confirmed in the step 3 above m...

Page 178: ...tep 2 Install an inverter analyzer instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service...

Page 179: ...ower module Refer to Check No 22 3 If NG in Check No 22 replace the power module Replace the main PCB The power module is united with the main PCB If OK in Check No 22 check if there is any solder cra...

Page 180: ...between the pins 4 2 is 0 15 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 4 pulses 0 15 VDC are output at the pins 4 1 when the fan motor is rotated 1 turn by hand...

Page 181: ...r heat exchanger very dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction C...

Page 182: ...rring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 50 65 80 class R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan syst...

Page 183: ...ng of the model in question Be careful never to touch any live parts 50 65 80 class To prevent electrical shock use a multimeter to check that the voltage between P and N is 50 V or less The surface o...

Page 184: ...g Disconnect the compressor harness connector from the outdoor unit PCB To disengage the connector press the protrusion on the connector Follow the procedure below to measure resistance between the or...

Page 185: ...SiSG121917E Check Part 6 Service Diagnosis 180 50 65 80 class 90 class V U DC DC R22378 W R21130 W V U DCP2 DCM2...

Page 186: ...iring Error Check Function 185 4 Trial Operation 187 4 1 Indoor Unit 187 4 2 Outdoor Unit 189 5 Field Settings 191 5 1 Wall Mounted and LSP Duct Type Indoor Unit 191 5 2 MSP Duct Type Indoor Unit 193...

Page 187: ...unit Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After A minutes close the liquid stop valve with a hexagonal wrench 4 Afte...

Page 188: ...e cover back on 1 screw 7 Turn on the power 8 Push the forced operation switch SW1 above the service cover Start forced cooling operation Forced cooling operation will stop automatically after about 1...

Page 189: ...the forced operation switch SW1 Start forced cooling operation Forced cooling operation will stop automatically after about 15 minutes To stop forced cooling operation push the forced operation switch...

Page 190: ...mpossible The LED indicators blink all at the same time Transmission failure occurs at any of the indoor units The indoor unit heat exchanger thermistor is disconnected An indoor unit is in trouble if...

Page 191: ...connected liquid and gas pipes cannot be self corrected Be sure to make the liquid pipe and the gas pipe in pairs 2 To cancel the wiring error check procedure halfway press the wiring error check swit...

Page 192: ...ation is disabled for 3 minutes after the system has been turned off 4 After trial operation is complete set the temperature to a normal level 26 C to 28 C When operating the air conditioner in coolin...

Page 193: ...30 minutes and switches into normal mode To quit a trial operation press ON OFF button With BRC086A22 Remote Controller 1 Completely open the stop valve on gas side 2 Completely open the stop valve o...

Page 194: ...ng the air conditioner in COOL operation in winter activate trial operation mode by following the instructions in the installation manual for the indoor unit The air conditioner draws a small amount o...

Page 195: ...d Water leakage System is properly earthed Electrical leakage The electric wires are connected correctly Incomplete cooling function The wiring conforms with the specifications No operation or burn da...

Page 196: ...button The indoor unit operation lamp will blink for about 1 minute 4 Press the indoor unit ON OFF switch while the operation lamp is blinking If setting could not be carried out completely while the...

Page 197: ...you cut a jumper unintentionally Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them 5 1 2 Jumper and Switch Settings For the location of the jumpers refe...

Page 198: ...for each optional accessory Procedure With BRC086A22 Remote Controller 1 When in the normal mode press INSPECTION button for 4 seconds or more and the FIELD SET MODE is entered 2 Select the desired MO...

Page 199: ...or when filter contamination is a lot and spacing time of display time to clean air filter is to be halved a little light approx 2 500 hours a lot heavy approx 1 250 hours 3 Spacing time of display ti...

Page 200: ...unit AirNet Address 1 3 Press Menu Enter button Field settings screen In the case of individual setting per indoor unit In the case of group setting 3 4 5 Unit No 0 1 01 5 9 2 02 6 3 01 7 Field settin...

Page 201: ...sic screen returns Setting confirmation Mode No First Code No Description of setting Second Code No 01 02 03 04 10 20 0 Filter Contamination Heavy Light Setting for spacing time of display time to cle...

Page 202: ...old Mode button for 4 seconds or longer to set When the display is changed from Main RC to Sub RC the setting is completed 2 Basic screen is displayed The remote controllers are factory set to MAIN so...

Page 203: ...e MAIN SUB setting switch SS1 on the signal receiver PCB to SUB Set the address setting switch SS2 on the signal receiver PCB according to the table below Wireless Remote Controller Setting Factory Se...

Page 204: ...or Unit Display on remote controller Behavior to the remote controller operation when the functions are restricted as by an external control Other than the left A Standard factory set All items displa...

Page 205: ...room unit is received The operation mode of the priority room unit has precedence Cancellation of control Example The control function is canceled when the POWERFUL operation mode is switched off or...

Page 206: ...he neighbors However if NIGHT QUIET mode is running cooling capacity is reduced Details Slide the SW6 1 SW5 5 to the ON side 5 3 3 Limitation Setting for Input Current Outline You can select an upper...

Page 207: ...e outdoor unit at the same time and holding them for 5 seconds while the compressor is stopped The LEDs are lit in turn for 15 seconds to show the ECONO mode status The factory setting is effective Un...

Page 208: ...de bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor...

Page 209: ...SiSG121917E Part 8 Appendix 204 1 Piping Diagrams 205 1 1 Indoor Unit 205 1 2 Outdoor Unit 206 2 Wiring Diagrams 209 2 1 Indoor Unit 209 2 2 Outdoor Unit 215 3 Operation Limit 218 Part 8 Appendix...

Page 210: ...s SiSG121917E 205 Part 8 Appendix 1 Piping Diagrams 1 1 Indoor Unit 1 1 1 Wall Mounted Type CTKS25 35TVMG CTKB25 35TVMG CTKS50TVMG CTKB50TVMG CTKS60TVMG CTKB60TVMG CTKS71TVMG 4D104482 4D095915D 4D1044...

Page 211: ...pe 1 2 Outdoor Unit MKS50TVMG MKB50TVMG FDKS25 35EAVMB FDKS25 35CAVMB FDKS50 60CVMB FDMR50 60 71TVMG C 4D045449X FDKS25EAVMB FDKS35EAVMB 9 5 12 7 FDKS25CAVMB FDKS50CVMB FDKS60CVMB FDKS35CAVMB MODEL MO...

Page 212: ...Piping Diagrams SiSG121917E 207 Part 8 Appendix MKS65TVMG MKB65TVMG MKS80TVMG 3D103941A 3D103942A...

Page 213: ...SiSG121917E Piping Diagrams Part 8 Appendix 208 MKS90TVMG 3D104086...

Page 214: ...grams 2 1 Indoor Unit 2 1 1 Wall Mounted Type CTKS25 35 50TVMG A1P Control PCB A2P Display signal receiver PCB A3P INTELLIGENT EYE sensor PCB A4P Adaptor PCB A5P Wireless LAN adaptor PCB Refer to page...

Page 215: ...ix 210 Note CTKS60 71TVMG A1P Filter PCB A2P Control PCB A3P Display signal receiver PCB A4P INTELLIGENT EYE sensor PCB A5P Adaptor PCB A6P Wireless LAN adaptor PCB Refer to page 29 for Printed Circui...

Page 216: ...SiSG121917E 211 Part 8 Appendix Note CTKB25 35 50TVMG PCB1 Control PCB PCB2 Display signal receiver PCB PCB3 INTELLIGENT EYE sensor PCB Refer to page 27 for Printed Circuit Board Connector Wiring Dia...

Page 217: ...iagrams Part 8 Appendix 212 Note CTKB60TVMG PCB1 Filter PCB PCB2 Control PCB PCB3 Display signal receiver PCB PCB4 INTELLIGENT EYE sensor PCB Refer to page 29 for Printed Circuit Board Connector Wirin...

Page 218: ...1917E 213 Part 8 Appendix Note 2 1 2 LSP Duct Type FDKS25 35EAVMB FDKS25 35CAVMB FDKS50 60CVMB PCB1 Control PCB PCB2 Display signal receiver PCB Refer to page 32 for Printed Circuit Board Connector Wi...

Page 219: ...iSG121917E Wiring Diagrams Part 8 Appendix 214 Note 2 1 3 MSP Duct Type FDMR50 60 71TVMG A1P Control PCB A2P Indoor fan PCB Refer to page 34 for Printed Circuit Board Connector Wiring Diagram 3D112629...

Page 220: ...ing Diagrams SiSG121917E 215 Part 8 Appendix Note 2 2 Outdoor Unit MKS50TVMG MKB50TVMG PCB1 Main PCB PCB2 Service monitor PCB Refer to page 38 for Printed Circuit Board Connector Wiring Diagram 3D1087...

Page 221: ...SiSG121917E Wiring Diagrams Part 8 Appendix 216 Note MKS65 80TVMG MKB65TVMG PCB1 Main PCB PCB2 Service monitor PCB Refer to page 38 for Printed Circuit Board Connector Wiring Diagram 3D095876D...

Page 222: ...Wiring Diagrams SiSG121917E 217 Part 8 Appendix Note MKS90TVMG PCB1 Main PCB PCB2 Inverter PCB PCB3 Service monitor PCB Refer to page 40 for Printed Circuit Board Connector Wiring Diagram 3D078236C...

Page 223: ...SiSG121917E Operation Limit Part 8 Appendix 218 3 Operation Limit MKS50 65 80 90TVMG MKB50 65TVMG 4D078793B...

Page 224: ...will be used This statement does not purport to exclude restrict or modify the application of any local legislation z z Ask a qualified installer or contractor to install this product Do not try to in...

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