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Mitsubishi Heavy Industries KXZR Series Manual
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Mitsubishi Heavy Industries KXZR Series Manual

Vrf inverter multi-system air conditioners (heat recovery 3-pipe systems)
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SERVICE MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
(HEAT RECOVERY 3-PIPE SYSTEMS)
(OUTDOOR UNIT)
KXZR series (Heat recovery type)
Standard series
●Single use
FDC224KXZRE1,280KXZRE1,335KXZRE1,400KXZRE1,450KXZRE1,475KXZRE1,500KXZRE1,560KXZRE1,
615KXZRE1,670KXZRE1
●Combination use
FDC735KXZRE1,800KXZRE1,850KXZRE1,900KXZRE1,950KXZRE1,1000KXZRE1,1060KXZRE1,1120KXZRE1,
1200KXZRE1,1250KXZRE1,1300KXZRE1,1350KXZRE1,1425KXZRE1,1450KXZRE1,1500KXZRE1,
1560KXZRE 1,1620KXZRE1,1680KXZRE1
●High-COP combination use
FDC450KXZRXE1(FDC224KXZRE1+FDC224KXZRE1),
FDC500KXZRXE1(FDC224KXZRE1+FDC280KXZRE1),
FDC560KXZRXE1(FDC280,KXZRE1+FDC280KXZRE1),
FDC615KXZRXE1(FDC280KXZRE1+FDC335KXZRE1),
FDC670KXZRXE1(FDC335KXZRE1+FDC335KXZRE1),
FDC735KXZRXE1(FDC224KXZRE1+FDC224KXZRE1+FDC280KXZRE1),
FDC800KXZRXE1(FDC224KXZRE1+FDC280KXZRE1+FDC280KXZRE1),
FDC850KXZRXE1(FDC280KXZRE1+FDC280KXZRE1+FDC280KXZRE1),
FDC900KXZRXE1(FDC280KXZRE1+FDC280KXZRE1+FDC335KXZRE1),
FDC950KXZRXE1(FDC280KXZRE1+FDC335KXZRE1+FDC335KXZRE1),
FDC1000KXZRXE1(FDC335KXZRE1+FDC335KXZRE1+FDC335KXZRE1)
Note:
•
(1) Regarding the Indoor unit series, refer to the No.'15 • KX-T-247
(2) Regarding the Duct Connected-High static Pressure-type Outdoor Air Processing Unit
Series (FDU500〜1800FKXE6), refer to the DATA BOOK No.'08
Manual No. '17
•
KX-DB-122
•
KX-SM-261

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Summary of Contents for Mitsubishi Heavy Industries KXZR Series

  • Page 1 Manual No. '17 KX-SM-261 • SERVICE MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (HEAT RECOVERY 3-PIPE SYSTEMS) (OUTDOOR UNIT) KXZR series (Heat recovery type) Standard series ●Single use FDC224KXZRE1,280KXZRE1,335KXZRE1,400KXZRE1,450KXZRE1,475KXZRE1,500KXZRE1,560KXZRE1, 615KXZRE1,670KXZRE1 ●Combination use FDC735KXZRE1,800KXZRE1,850KXZRE1,900KXZRE1,950KXZRE1,1000KXZRE1,1060KXZRE1,1120KXZRE1, 1200KXZRE1,1250KXZRE1,1300KXZRE1,1350KXZRE1,1425KXZRE1,1450KXZRE1,1500KXZRE1, 1560KXZRE 1,1620KXZRE1,1680KXZRE1 ●High-COP combination use FDC450KXZRXE1(FDC224KXZRE1+FDC224KXZRE1), FDC500KXZRXE1(FDC224KXZRE1+FDC280KXZRE1), FDC560KXZRXE1(FDC280,KXZRE1+FDC280KXZRE1),...
  • Page 2 '17 • KX-SM-261 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ..... 1 1.1 Remote control (Option parts) ..............1 1.2 Operation control function by the wired remote control ......4 1.3 Operation control function by the indoor control ........9 1.4 Operation control function by the outdoor control ........
  • Page 3 '16 • PAC-T-251 '17 • KX-SM-261 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 1.1 Remote control (Option parts) Wired remote control Wired remote control Model RC-EX3 Model RC-EX3 ⑤ LCD (With backlight) ③...
  • Page 4 '17 • KX-SM-261 Wired remote control Model RC-E5 The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated.
  • Page 5 '17 • KX-SM-261 Wireless remote control Indication section Indicates set temperature. Indicates the status of swing louver. Indicates selected operation with Indicates the selected air flow volume Indicates for two seconds when FILTER button is pressed. Indicates when ON-TIMER is set. Indicates when OFF-TIMER is set.
  • Page 6 '16 • PAC-T-251 '17 • KX-SM-261 1.10.2 Operation control function by the wired remote control 1.2 Operation control function by the wired remote control ●Model RC-EX3 (1) Switching sequence of the operation mode switches of remote control (a) Tap the change operation mode button on the TOP screen. (b) When the change operation mode screen is displayed, tap the button of desired mode.
  • Page 7 '16 • PAC-T-251 '17 • KX-SM-261 ●Content memorized with the power failure compensation are as follows. Note(1) Items (f) and (g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not.
  • Page 8 '17 • KX-SM-261 Operation and setting from remote control A : Refer to the instruction manual for RC-EX series ○：Nearly same function setting and operations are possible. B : Refer to the installation manual for RC-EX series △：Similar function setting and opperations are possible. C : Loading a utility software vie Internet Setting ＆...
  • Page 9 '17 • KX-SM-261 Setting ＆ display item Description RC-EX3 RC-E5 2 Administrator settings R/C display setting Register [Room name] [Name of I/U] Display [Indoor temp. display] or not. △ [Administrator password] Display [Error code display] or not. Display [Heating stand-by display] [Defrost operation display] [Auto cooling/heating display] [Display temp of R/C, Room, Outdoor] or not The administrator password can be changed.
  • Page 10 '16 • PAC-T-251 '17 • KX-SM-261 ●Model RC-E5 Switching sequence of the operation mode switches of remote control COOL HEAT AUTO CPU reset This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that of the power source reset.
  • Page 11 '17 • KX-SM-261 1.3 Operation control function by the indoor control (1) Auto operation (Heat recovery 3-pipe combintion systems only) (a) If “Auto” mode is selected by the remote control, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and indoor air temperature.
  • Page 12 '17 • KX-SM-261 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating". 1)  I n case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor air tem- perature"...
  • Page 13 '17 • KX-SM-261 Timer operation (a) RC-EX3 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 operation, in the range from 1 to 12 hours (in the unit of hour).
  • Page 14 '17 • KX-SM-261 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”. Hot start (Cold draft prevention at heating) (a) Operating conditions When either one of following conditions either of (i) to (iv), the hot start control is performed.
  • Page 15 '17 • KX-SM-261 Auto swing control (a) RC-EX3 Louver control To operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control. The wind direction select screen will be displayed. To swing the louver, touch the “Auto swing” button. The lover will move up and down. To fix the swing louver at a position, touch one of [1] - [4] buttons.
  • Page 16 '17 • KX-SM-261 Thermostat operation (a) Cooling (i) Thermostat is operated with the room temperature control. (ii) Thermostat is turned ON or OFF relative to the set room temperature as shown below. Thermostat ON Temperature drop Thermostat OFF Temperature rise Set room temperature (iii) Thermostat is turned ON when the room temperature is in the range of -1 <...
  • Page 17 '17 • KX-SM-261 (d) Fan control during cooling thermostat OFF (Except FDTC, FDTQ, FDUT15-56, FDUH, FDK, FDFW, FDFL, FDFU) (i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired remote control. ①...
  • Page 18 '17 • KX-SM-261 (b) When the oil return control has started while the thermostat is turned ON, the thermostat is not turned OFF even if the thermostat OFF condition is satisfied during the oil return control. (12) Drain pump control This control is operated when the inverter frequency is other than 0 rps during the cooling operation and automatic cooling and dehumidifying operations.
  • Page 19 '17 • KX-SM-261 (14) Operation check/drain pump test run operation mode 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 within 60 seconds after turning power on by the dip switch (SW7-1) ON, it enters the operation check mode.
  • Page 20 '17 • KX-SM-261 (19) External input/output control (CnT or CnTA) Be sure to connect the wired remote control to the indoor unit. Without wired remote control remote operation by CnT is not possible to perform.  ・ CnT ・ CnTA Option ①...
  • Page 21 Unit B Remote Remote control OFF control ON '17 • KX-SM-261 (ii) In case of “Pulse input” setting (Local setting) It is effective only when the input signal to CnT-6 or CnTA is changed OFF→ON, and at that time unit operation [ON/ OFF] is inverted.
  • Page 22 '17 • KX-SM-261 *(2) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Pulse input (Local setting)”; ① When card key switch is ON (Operation permission), the unit starts operation in conjunction with ON signal. and also start/stop operation of the unit from the wired remote control becomes available.
  • Page 23 Actual operation Stop Stop Stop Stop '17 • KX-SM-261 Remote control Remote Remote Remote control OFF control ON control ON Note (1) If it is prohibited by CnT, all “Operation” and “Stop” commands are not accepted. (d) In case of CnT ② Operation/stop pulse + CnTA ③ Operation permission/prohibition level CnTA Operation permission/ prohibition level...
  • Page 24 '17 • KX-SM-261 (22) Room temperature detection temperature compensation during heating With the standard specification, the compressor is turned ON/OFF with the thermostat setting temperature. When the thermostat is likely to turn OFF earlier because the unit is installed at the ceiling where warm air tends to accumulate, the setting can be changed with the wired remote control indoor unit function “...
  • Page 25 '17 • KX-SM-261 (25) Multiple indoor units control (Heat recovery 3-pipe combination systems only) (a) The indoor unit that controls the branching control directly is named as the master unit. (i) Other indoor units that are connected to the same branching control are named as the slave unit. (ii) Specify the “Master”...
  • Page 26 '17 • KX-SM-261 (31) Fan circulator 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. (mormal 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 temperature sensor and the indoor unit return air temperature sensor becomes bigger than 3°C.
  • Page 27 '17 • KX-SM-261 1.4 Operation control function by the outdoor control (A) Normal control Operation of major functional components under each operation mode Operation Cooling Heating mode Dehumidify Functional Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Defrost Components Remote control Remote control Remote control Remote control...
  • Page 28 '17 • KX-SM-261 (2) Compressor control (Master unit/slave unit) (a) Starting compressor Compressor starting order After turning the power on, firstly CM1 compressor starts. (In case of the combination use, it is CM01 of master unit) And corresponding to the condition of under-dome temperature and to the required capacity of indoor units thermo- stat ON, the next compressor will start sequentially, and finally maximum 6 compressors ( in case of 3 outdoor units combination use) will start simultaneously.
  • Page 29 '17 • KX-SM-261 5) 2 outdoor units combination use (Model 735) Model 400 (Master) + 335 (Slave) Master unit Slave unit CM01 CM11 (CM1) (CM1) Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Compression ［...
  • Page 30 '17 • KX-SM-261 8) 3 outdoor units combination use (Models High−COP 735, 800, 850, 900, 950, 1000) Master unit Slave unit 1 Slave unit 2 CM01 CM11 CM21 (CM1) (CM1) (CM1) Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Compression ［...
  • Page 31 '17 • KX-SM-261 (3) Outdoor fan control (Master unit/slave unit) (a) Outdoor fan speed and fan motor rotation speed Unit : min Cooling Heating Remarks˝ Fan tap FMo1 FMo2 FMo1 FMo2 0th speed stop 1st speed Min. speed at 1 FM operation Max.
  • Page 32 '17 • KX-SM-261 (5) Defrost operation (Master unit/Slave unit) If the defrost operation starting conditions at the outdoor heat exchanger are satisfied, defrost operation starts. (a) Temperature conditions for defrost operation Conditions for starting defrost operation When all of following conditions are satisfied, defrost operation will be started. 1) When the cumulative operation time Fig.1 J15 opened...
  • Page 33 '17 • KX-SM-261 (6) Protective control (a) High pressure protective control/error If the high pressure exceeds 3.7 MPa, the compressor speed is reduced gradually. It reduces to 20 rps at the lowest. If the high pressure still rises to 4.15 MPa, the compressor stops. (b) Low pressure protective control/error If the low pressure drops below 0.18 MPa, the compressor speed is reduced gradually.
  • Page 34 '17 • KX-SM-261 (7) Auto backup operation (a) Classication of auto backup operations When the auto backup operation is enabled, anomaly stops are classified as follows and countermeasures are provided for respective categories. System stop: All stop including master/slave units Unit stop: Stop in the unit of outdoor unit Compressor stop: Stop in the unit of compressor (b) Control contents of auto backup operation...
  • Page 35 '17 • KX-SM-261 Anomalous stop of master outdoor unit Anomalous stop of slave outdoor unit Remote control Anomaly contents error display System stop Unit stop Compressor stop System stop Unit stop Compressor stop Duplicated outdoor unit address No. Open L3 Phase on power source at primary side Discharge pipe temperature error Outdoor heat exchanger and subcooling coil temperature thermistor anomaly...
  • Page 36 '17 • KX-SM-261 (8) Test run (a) This control can be performed from the master unit, not from the slave unit. If this control is done from the slave unit, the following display is shown on the 7-segement display. The display returns to normal display if the test run control switch is reset. Code indicator Data indicator Contents of invalid operation...
  • Page 37 '17 • KX-SM-261 (9) Branching control Switching between high and low-pressure gas pipes is performed by branching control when indoor units start operation, or if indoor units are switched between cooling and heating. The indoor unit controls branching control directly by use of CnT2 output from the indoor control board.
  • Page 38 Code Contents of a display Communication protocol 0: Previous SL mode (The communication plotocol is displayed ; display only)                     1: New SL mode '17 • KX-SM-261 Automatic address start Input starting address Specify a starting indoor unit address in automatic address setting. Option controls Input number of connected indoor units ...
  • Page 39 '17 • KX-SM-261 '14 • KX-SM-202 The operation condition is displayed on the LCD of remote control and it is transferred to option central control. When the operation command from remote control is not accepted by this control, "Center" is displayed on the LCD of remote control.
  • Page 40 '14 • KX-SM-202 '17 • KX-SM-261 Demand control Demand ratio can be changed with the 7-segment "P04" on the outdoor control PCB. Compressor P04 setting output (%) 080(Factory default) This control has priority over the controls of 4-way valve safeguard, compressor protective start operation, defrost operation, oil equalized operation, oil return operation, pump-down operation for replacement, Start/Stop pump-down operation and check operation.
  • Page 41 '14 • KX-SM-202 '17 • KX-SM-261 Valid(Open) Demand input Demand control Demand control (CnS1,S2,G1,G2) Normal Normal Invalid(Shorted) Valid(Open) Demand input 2 Demand control (CnS1,S2,G1,G2) Normal Normal Invalid(Shorted) PUSH PUSH PUSH PUSH Remote control operation Remote Remote control display 1st step 1st step 2nd step 3rd step 2nd step 1st step Air-conditioner operation/stop...
  • Page 42 '17 • KX-SM-261 (2) Silent mode control (Note) With CnG2 terminal and 7-segment display [P10]-[3] for silent mode 1(Factory default) or with CnG2 terminal and 7-segment display [P10]-[8] for silent mode 2 (Setting on site) It is also avilable to use other terminals as follows. CnS2: [P08]-[3] or -[8] CnS1: [P07]-[3] or -[8] CnG1: [P09]-[3] or -[8]...
  • Page 43 '17 • KX-SM-261 (3) Outdoor fan snow protection control (Master unit/Slave unit) (Note) Following explanation is based on setting function with 7-segment display [P02]. However the following terminals and 7-segment function settings are available to use. CnS1: [P07]-[5] CnS2: [P08]-[5] CnG1: [P09]-[5] CnG2: [P10]-[5] The setting of this control should be done not only on the master unit but also on the slave unit, because the fans of master...
  • Page 44 '17 • KX-SM-261 (5) Operation and error signal output (Master unit/Slave unit) This is the function to retrieve and display the operation and error information on the outdoor unit as a batch. Although indoor units also have the function to retrieve the operation and error information, this function is designed to retrieve the whole information of each refrigeration system connected to the outdoor unit.
  • Page 45 '17 • KX-SM-261 2: Compressor ON output ·It is turned ON, when the compressor is ON 3: Fan ON output ·It is turned ON, when the outdoor fan No.1 speed command > 0, or the outdoor fan No.2 speed command > 0. 4: Oil return operation output ·It is turned ON at oil return operation in cooling or at oil return operation in heating, or at defrost operation in heating.
  • Page 46 '17 • KX-SM-261 (8) Pump-down operation by external input If an error stop is raised by an external input by refrigerant leaking alarm unit, the pump-down operation is performed at the outdoor unit side in order to prevent the refrigerant from leaking. They are local arrangements.
  • Page 47 '17 • KX-SM-261 ●Sample of system configuration Alarm unit Valve to shut gas pipe Valve to shut liquid pipe Output for valve to shut liquid pipe :CNY Wiring part no. PCZ006A051A Output for valve to shut gas pipe : CNZ1 Wiring part no.
  • Page 48 '17 • KX-SM-261 (9) Continuous Heating Capacity Control (CHCC) (a) Starting condition Defrost operation interval extension control ① When 7-segment [P00] is set at 1. ② When the defrost operation start conditions 1) – 3) are satisfied. ③ When the lowest one of three outdoor heat exchanger sensor temperatures (thermistors Tho-R1, -R2 and-R5) falls in the defrost range (fig 1) which is determined by the outdoor air temperature thermistor (Tho-A) of the de- frost control <Starting condition>...
  • Page 49 '17 • KX-SM-261 (10) Indoor unit forced cooling settings Indoor units can be changed to cooling-only operation (only cooling, dehumidification and fan operations are enabled) by using external inputs CnS1, CnS2, CnG1 and CnG2. The indoor units specified by the 7-segment P25 display are set to cooling-only operation. The set value on the 7-segment P25 display correspond to the indoor unit addresses.
  • Page 50 '17 • KX-SM-261 2) Code No. “C18”: Suction superheat degree [Suction superheat degree] = [Suction pipe temperature detected with suction pipe temperature thermistor (Tho-S)] -[Low pressure saturated temperature detected with low pressure sensor (PLS)] The calculated result is displayed after rounding to one decimal place. Or if the calculated result is a negative value, “0.0”...
  • Page 51 '17 • KX-SM-261 (b) 7-Segment display Code Data display Minimum Contents of display Remarks range unit Unusual code Pump down PoE, PoS Ð − − Check mode CH?, PCL? Outdoor unit setup, piping cleaning oPE?? CM1 operating frequency 0 − 130 0 −...
  • Page 52 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit PSH High pressure sensor 0 − 5.00 0.01MPa PSL Low pressure sensor 0 − 2.00 0.01MPa Order of 100 : 63H1-1, 2 63H1-1 Order of 10 : 63H1-R 63H1-2 −...
  • Page 53 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit 0 − 999 Target Fk Inverter 1 operating frequency command 1rps 0 − 140 Inverter 2 operating frequency command 0 − 140 1rps FMo1 operating revolution command 0 −...
  • Page 54 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit Counter · Anomalous FMo2 0 − 255 EEPROM memory. Resettable. ＿ Counter · Indoor-outdoor communications error 0 − 255 EEPROM memory. Resettable. 0 − 255 Counter · CPU reset —...
  • Page 55 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit Spare 1: (Factory default) – Spare –1: (Factory default) – Spare 39: (Factory default) – Spare 1: (Factory default) – Spare 20: (Factory default) – Spare –1: (Factory default) –...
  • Page 56 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit Spare 0.5: (Factory default) – Spare 3: (Factory default) – Spare 0: (Factory default) – Spare 5: (Factory default) – Spare 0: (Factory default) – Spare 6: (Factory default) –...
  • Page 57 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit Spare 1.5: (Factory default) – Spare 0: (Factory default) – Spare 0: (Factory default) – Spare 0: (Factory default) – Spare 0: (Factory default) – Spare 0: (Factory default) –...
  • Page 58 '17 • KX-SM-261 Code Data display Minimum Contents of display Remarks range unit 0: (Factory default) Spare − Spare 0: (Factory default) − 0: (Factory default) − Spare 0: (Factory default) − Spare Auto address setting on Indoor unit address No. assignment normal ending Indoor unit address No.
  • Page 59 '17 • KX-SM-261 [C68] Compressor stop causes <Definition of signal> Shows the latest compressor stop cause counted from right now. (Excluding the ordinary stop, etc.) Output of the No. is retained till next compressor stop cause occurs. Compressor stop causes Number No history Tho-A...
  • Page 60 '17 • KX-SM-261 (c) Saving of Operation Data For the purpose to investigate the cause of trouble in the field, the operation data are always saved in the memory, and if the trouble occurs, the data writing is stopped and the operation data prior to the trouble occurrence are recorded. These data can be retrieved to personal computer through RS-232C connector on the outdoor control PCB and utilized for probing the cause.
  • Page 61 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Heating operation 1-speed Heating operation 2-speed Heating operation 3-speed Heating operation 4-speed Heating operation 5-speed Heating operation 6-speed Indoor unit 1 Demand frequency 0 −...
  • Page 62 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Tho-S Suction pipe temp. -35 − 75 A/D value Tho-SC Subcooling coil temp. 1 18 − 73 A/D value Liquid pipe side Suction pipe side Tho-H Sub cooling coil temp.2 -35 −...
  • Page 63 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes -32768 − Under-dome super heat CM1 0.01ºC -32767 -32768 − Under-dome super heat CM2 0.01ºC -32767 Target FK 0 − 65535 Inverter CM1 operation frequency 0 −...
  • Page 64 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Compressor 2 cumulative operating time (estimate) 0 − 65535 Compressor 1 start times 0 − 65535 20 times Compressor 2 start times 0 − 65535 20 times Control status 0 −...
  • Page 65 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes 0: Normal Bit6 Spare 1: Practice 0: Normal Bit7 Spare 1: Practice 0: Normal Bit0 Auto backup operation — — Control status 3 1: Practice 0: Count Bit1...
  • Page 66 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes — Protection control causes 3 0 − 127 Compressor stop causes 0 − 127 — Compressor stop causes lapse of time 0 − 255 Control status 0 −...
  • Page 67 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes — — Version (Initial value FFh) INV 1 information — — DIP SW (Initial value FFh) — — Version (Initial value FFh) INV 2 information —...
  • Page 68 '17 • KX-SM-261 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Bit4 Spare Switching to heating wind Bit5 temperature security priority First push priority — Priority operation SW Last push priority Heating setting 1 (Target exit temperature) 40 −...
  • Page 69 '17 • KX-SM-261 '14 • KX-SM-202 (2) Outdoor PCB setting Code Input Remarks Outdoor address No. (Order of 10) Outdoor address No. (Order of 1) SW3-1 Inspection LED reset Normal★/Reset SW3-2 Auto backup operation None★/With SW3-5 Check operation start Normal★/Check SW3-7 Forced cooling/heating Normal★/Forced cooling-heating...
  • Page 70 '17 • KX-SM-261 (3) Indoor PCB setting Code Input Default setting Remarks Indoor unit address No.(Order of 10) Indoor unit address No.(Order of 1) Outdoor unit address No.(Order of 10) Outdoor unit address No.(Order of 1) SW5-1 Superlink selection Automatic*/Previous SL Automatic SW5-2 Indoor unit address No.(Order of 100)
  • Page 71 ‘17 • KX-SM-261 2. SYSTEM TROUBLESHOOTING PROCEDURE 2.1 Basics of troubleshooting Basic troubleshooting is to check/analyze/save data by connecting the Mente PC. Whenever arriving at the site, always connect the Mente PC before starting work. Method of error data analysis (Basic procedure) • Identify whether particular error occurred during operation or stopping.
  • Page 72 '17 • KX-SM-261 2.2 Explanation of troubleshooting (a) Checking DC15V on the control PCB (Step to check if the inverter PCB fails or not) Use this to diagnose E41, E42, E45 and E48. Power OFF (Power source circuit breaker OFF) Fan motor check *Be sure to check both fan motor 1 and 2 Be sure to wait for 3 minutes after turning the...
  • Page 73 ‘17 • KX-SM-261 2.3 Contents of troubleshooting (a) List of inspection displays Indoor and outdoor units Remote 7-segment control Name of inspection Classification Page display error code – Remote control communication error Communication error – Duplicated indoor unit address Address setting error –...
  • Page 74 '17 • KX-SM-261 Troubleshooting Green Error code Content Keeps flashing Stays OFF None Indoor Operates but does not cool Remote control: 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and suction air of indoor unit.
  • Page 75 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor None Operates but does not heat Remote control: 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and suction air of indoor unit.
  • Page 76 '17 • KX-SM-261 Green Content Error code Stays OFF Stays OFF Stays OFF Indoor Remote control: None Earth leakage breaker activated 7-segment display: – Stays OFF Stays OFF Outdoor Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the insulation resistance Replace compressor.
  • Page 77 ‘17 • KX-SM-261 Green Content Error code – – Indoor None Excessive noise/vibration (1/3) Remote control: 7-segment display: – – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient time has elapsed after Does noise/ vibration occur during stopping the unit, it is or soon after stopping...
  • Page 78 '17 • KX-SM-261 Green Content Error code – – Indoor None Excessive noise/vibration (2/3) Remote control: 7-segment display: – – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.
  • Page 79 ‘17 • KX-SM-261 Green Content Error code – – Indoor None Excessive noise/vibration (3/3) Remote control: 7-segment display: – – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling...
  • Page 80 '17 • KX-SM-261 Green Content Error code Louver motor failure Keeps flashing Stays OFF Indoor None Remote control: 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure � Check at the indoor unit side. Operate after waiting for more than 1 minute.
  • Page 81 ‘17 • KX-SM-261 Green Power source system anomaly Content Error code Stays OFF Stays OFF Indoor None Remote control: (Power source to indoor unit PCB) 7-segment display: – Stays OFF 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDT, FDK series only Diagnosis Countermeasure AC 220-240V...
  • Page 82 ‘17 • KX-SM-261 Green Power source system anomaly Content Error code Stays OFF Stays OFF Indoor None Remote control: (Power source to indoor unit PCB) 7-segment display: – Stays OFF 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Except FDT, FDK series Diagnosis Countermeasure AC 220-240V...
  • Page 83 ‘17 • KX-SM-261 Green Content Error code Power source system error Keeps flashing Stays OFF Indoor None Remote control: (Power source to remote control) 7-segment display: – Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model FDT, FDK series only Diagnosis Countermeasure Is the connection of the Correct.
  • Page 84 ‘17 • KX-SM-261 Green Content Error code Power source system error Keeps lighting Stays OFF Indoor None Remote control: (Power source to remote control) 7-segment display: – Keeps lighting 2-time flash Outdoor 5. Troubleshooting 1. Applicable model Except FDT, FDK series Diagnosis Countermeasure Isn't there any...
  • Page 85 ‘17 • KX-SM-261 Green Content Error code WAIT Keeps flashing Stays OFF Indoor WAIT Remote control: 7-segment display: – Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 minutes is kept on WAIT...
  • Page 86 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: – Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of fuse blown, how to check the unit before replacement of fuse.) Isn't there any short circuit...
  • Page 87 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: – Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON.) No display on the remote control after power ON.
  • Page 88 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: – Keeps flashing Keeps flashing Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 minutes is kept on WAIT...
  • Page 89 ‘17 • KX-SM-261 Green Content Error code Stays OFF Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: – Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that LED on outdoor control PCB stays OFF.) In case that LED on outdoor control PCB stays OFF.
  • Page 90 ‘17 • KX-SM-261 Green Content Error code Stays OFF Stays OFF Indoor Remote control: WAIT WAIT 7-segment display: – Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of fuse blown, how to check the unit before replacement of fuse.) From previous page.
  • Page 91 ‘17 • KX-SM-261 Green Content Error code Stays OFF Stays OFF Indoor Remote control: [No display] [No display] 7-segment display: – Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON.) No display on the remote control after power ON.
  • Page 92 ‘17 • KX-SM-261 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: communication error 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by temporary reset normally by the power noise.
  • Page 93 ‘17 • KX-SM-261 Green Content Error code Keeps flashing 1-time flash Indoor Duplicated indoor unit address Remote control: – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the number of Review number of connected indoor units up connected units.
  • Page 94 '17 • KX-SM-261 Green Content Error code Keeps flashing 2-time flash Indoor E3/5 Outdoor unit signal line error Remote control: – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E3 is a communication error that occurs when communication between indoor and outdoor units is not established at all.
  • Page 95 ‘17 • KX-SM-261 Green Content Error code Keeps flashing *See below Indoor Communication error during operation Remote control: – 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor terminal block.
  • Page 96 '17 • KX-SM-261 Green Indoor heat exchanger Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature thermistor anomaly (Thi-R) – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Insert the connector the connector of thermistor connected securely.
  • Page 97 ‘17 • KX-SM-261 Green Indoor return air Content Error code Keeps flashing 1-time flash Indoor Remote control: temperature thermistor anomaly (Thi-A) – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector thermistor connected securely.
  • Page 98 '17 • KX-SM-261 Green Content Error code Keeps flashing 1-time flash Indoor Drain trouble Remote control: – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTQ, Diagnosis Countermeasure FDTS, FDR, FDU, FDUM, and FDUT series Check the error data in the remote control. Is there any overflow? Is DC 12V detected at CN1...
  • Page 99 ‘17 • KX-SM-261 Green Content Error code Excessive number of indoor units (more than 17 units) Keeps flashing Stays OFF Indoor Remote control: by controlling one remote control – 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more...
  • Page 100 '17 • KX-SM-261 Green Green Error code Content Content Error code Address setting error between Address setting error between Keeps flashing Stays OFF Indoor Remote control: Remote control: master and slave indoor units master and slave indoor units Indoor Keeps flashing Keeps flashing –...
  • Page 101 ‘17 • KX-SM-261 Green Content Error code Address setting error Keeps flashing 1-time flash Indoor Remote control: by mixed setting method 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't the automatic setting and Review address setting.
  • Page 102 ‘17 • KX-SM-261 Green Content Error code Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTS, Diagnosis Countermeasure FDU, FDUM, FDUT71, FDK, FDE, FDFW, FDU-F series Does any foreign material Remove foreign material.
  • Page 103 ‘17 • KX-SM-261 Green Content Error code Address setting error of Keeps flashing 1-ime flash Indoor Remote control: master and slave indoor units 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the address setting for the master indoor Correct the address setting of...
  • Page 104 ‘17 • KX-SM-261 Green Content Error code Indoor unit operation check, Keeps flashing 1-time flash Indoor Remote control: drain motor check mode anomaly 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Is SW7-1 Indoor control PCB...
  • Page 105 ‘17 • KX-SM-261 Green Content Error code Indoor DC fan motor rotation Keeps flashing 1-time flash Indoor Remote control: speed anomaly 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTS, Diagnosis Countermeasure FDU, FDUM, FDUT71, FDK, FDE, FDFW, FDU-F series Does any foreign material...
  • Page 106 ‘17 • KX-SM-261 Green Content Error code Defective panel switch Keeps flashing 1-time flash Indoor Remote control: operation (FDT) 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT series only Diagnosis Countermeasure Reset the error and close Is grill opened? the grill.
  • Page 107 ‘17 • KX-SM-261 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature thermistor anomaly (Thc) 7-segment display: – Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector thermistor connected securely.
  • Page 108 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Duplicated outdoor unit address No. Remote control: 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Check the conditions whether it occurs immediately after the power on or...
  • Page 109 ‘17 • KX-SM-261 Green Content Error code Open L3 Phase on Keeps flashing Stays OFF Indoor Remote control: power source at primary side 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 110 ‘17 • KX-SM-261 Green Discharge pipe temperature Content Error code Keeps flashing Stays OFF Indoor Remote control: error (Tho-D1, D2) E36-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E36-1: Tho-D1, E36-2: Tho-D2 *2 E36-1: 1-time flash, E36-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition Save data for 30 minutes before stopping in Mente PC.
  • Page 111 ‘17 • KX-SM-261 Outdoor heat exchanger Green Content Error code temperature thermistor (Tho-R) and subcooling Keeps flashing Stays OFF Indoor Remote control: coil temperature thermistor (Tho-SC,-H) anomaly E37-1, 2, 3, 4, 5, 6*1 7-segment display: Keeps flashing Outdoor E37-8, 9 *1 E 37-1: 1-time flash (Tho-R1), E37-2: 2-time flash (Tho-R2), E37-3: 3-time flash (Tho-R3), E37-4: 4-time flash (Tho-R4), E37-5: 5-time flash (Tho-SC), E37-6: 6-time flash (Tho-H) E37-8: 8-time flash (Tho-R5), E37-9: 9-time flash (Tho-R6) 5.
  • Page 112 ‘17 • KX-SM-261 Green Outdoor air temperature Content Error code Keeps flashing Stays OFF Indoor Remote control: thermistor anomaly (Tho-A) 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC.
  • Page 113 ‘17 • KX-SM-261 Green Content Error code Discharge pipe temperature Keeps flashing Stays OFF Indoor Remote control: thermistor anomaly (Tho-D1, D2) E39-1, 2*1 7-segment display: Keeps flashing Outdoor *1 E39-1: Tho-D1, E39-2: Tho-D2, *2 E39-1: 1-time flash, E39-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 114 ‘17 • KX-SM-261 Green High pressure anomaly Content Error code Keeps flashing Stays OFF Indoor Remote control: (63H1-1, 2 activated) 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition. Save data for 30 minutes before stopping in Mente PC.
  • Page 115 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor E41(E51) Remote control: Power transistor overheat E41(E51)-1, 2*1 7-segment display: Keeps flashing Outdoor *1 E41-1 (E51-1) : CM1, E41-2 (E51-2) : CM2 *2 E41-1 (E51-1) : 1-time flash, E41-2 (E51-2) : 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check, record operating condition. Save data for 30 minutes before stopping in Mente PC. Check power transistor temperature.
  • Page 116 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Current cut (CM1, CM2) E42-1, 2* 7-segment display: Keeps flashing Outdoor *1 E42-1: CM1, E42-2: CM2 *2 E42-1: 1-time flash, E42-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Save data for 30 minutes before stopping in Mente PC. Check, record operating condition.
  • Page 117 ‘17 • KX-SM-261 Green Content Error code Excessive number of indoor units connected, Keeps flashing Stays OFF Indoor Remote control: excessive total capacity of connection E43-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E43-1/1-time flash: Excessive number of indoor units connected, E43-2/2-time flash:Excessive capacity of connection 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 118 ‘17 • KX-SM-261 Green Content Error code Liquid flooding anomaly Keeps flashing Stays OFF Indoor Remote control: (CM1, CM2) E44-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E44-1: CM1, E44-2 : CM2 *2 E44-1: 1-time flash, E45-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor units Diagnosis Countermeasure Check and save the data of Save data for 30 minutes before stopping in Mente PC. operating condition.
  • Page 119 ‘17 • KX-SM-261 Green Content Error code Communication error between Keeps flashing Stays OFF Indoor Remote control: inverter PCB and outdoor unit control PCB(1/2) E45-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E45-1: INV1, E45-2: INVI *2 E45-1: 1-time flash, E45-2: 2-time flash When E45-1 and E45-2 occur simultaneously, 5. Troubleshooting 1. Applicable model inspect INV1 also for E45-2 in order to display E45-2.
  • Page 120 ‘17 • KX-SM-261 Green Content Error code Communication error between Keeps flashing Stays OFF Indoor Remote control: inverter PCB and outdoor unit control PCB(2/2) E45-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E45-1: INV1, E45-2: INVI *2 E45-1: 1-time flash, E45-2: 2-time flash When E45-1 and E45-2 occur simultaneously, 5. Troubleshooting 1. Applicable model inspect INV1 also for E45-2 in order to display E45-2.
  • Page 121 ‘17 • KX-SM-261 Green Content Error code Mixed address setting methods Keeps flashing Stays OFF Indoor Remote control: coexistent in same network 7-segment display: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
  • Page 122 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Outdoor DC fan motor anomaly(1/2) E48-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E48-1: 1-time flash (FMo1), E48-2 : 2-time flash (FMo2) *2 E48-1: 1-time flash, E48-2: 2-time flash 5. Troubleshooting 1. Applicable model ( Check also the fan motor 2, even if it is E48-1, and also the fan motor 1, even if it is E48-2. ) Outdoor unit Diagnosis Countermeasure...
  • Page 123 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Outdoor DC fan motor anomaly(2/2) E48-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E48-1: 1-time flash (FMo1), E48-2 : 2-time flash (FMo2) *2 E48-1: 1-time flash, E48-2: 2-time flash 5. Troubleshooting 1. Applicable model ( Check also the fan motor 2, even if it is E48-1, and also the fan motor 1, even if it is E48-2. ) Outdoor unit Diagnosis Countermeasure...
  • Page 124 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Low pressure anomaly 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions Save data for 30 minutes before stopping in Mente PC. Check error status.
  • Page 125 ‘17 • KX-SM-261 Green Content Error code Suction pipe temperature thermistor anomaly (Tho-S), Keeps flashing Stays OFF Indoor E53/E55*1 Remote control: E53/E55-1, 2 Under-dome temperature thermistor anomaly (Tho-C1, C2) 7-segment display: Keeps flashing Outdoor *1 E55-1 : Tho-C1, E55-2: Tho-C2 *2 E53 : E53·E55-1-time flash, E55-2: 2-time flash 5.
  • Page 126 ‘17 • KX-SM-261 Green Content Error code High pressure sensor anomaly (PSH) Keeps flashing Stays OFF Indoor Remote control: E54-1, 2 *1 Low pressure sensor anomaly (PSL) 7-segment display: Keeps flashing Outdoor *1 E54-1: 1-time flash (PSL), E54-2 : 2-time flash (PSH) 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
  • Page 127 ‘17 • KX-SM-261 Green Content Error code Power transistor temperature Keeps flashing Stays OFF Indoor Remote control: thermistor anomaly (Tho-P1, P2) E56-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E56-1/1-time flash:Tho-P1 anomaly, E56-2/2-time flash: Tho-P2-anomaly 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 128 ‘17 • KX-SM-261 Green Content Error code Anomalous compressor Keeps flashing Stays OFF Indoor Remote control: by loss of synchronism E58-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E58-1: CM1, E58-2: CM2 *2 E58-1: 1-time flash, E58-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check, record operating condition. Save data for 30 minutes before stopping in Mente PC.
  • Page 129 ‘17 • KX-SM-261 Green Compressor startup Content Error code Keeps flashing Stays OFF Indoor Remote control: failure (CM1,CM2) E59-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E59-1: CM1, E59-2: CM2 *2 E59-1: 1-time flash, E59-2: 2-time flash 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
  • Page 130 ‘17 • KX-SM-261 Green Content Error code Communications error between Keeps flashing Stays OFF Indoor Remote control: the master unit and slave units E61-1, 2 *1 7-segment display: Keeps flashing Outdoor *1 E61-1/1-time flash: Slave unit 1, E61-2/2-time flash: Slave unit 2 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Is the address setting of master Correct.
  • Page 131 ‘17 • KX-SM-261 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Emergency stop 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Indoor unit Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC. Check the conditions whether it occurs immediately after the power...
  • Page 132 '17 • KX-SM-261 '14 • KX-SM-202 2.4 Outdoor unit control PCB replacement procedure PCB012D046A Precautions for Safety ・ Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if WARNING proper safety procedures and instructions are not adhered to.
  • Page 133 '17 • KX-SM-261 After elapsing 3 minutes Target PCB from power OFF Control PCB voltage measurement point （between F1,DS1(-)） Fig.２ Voltage measurement points ※１：Reuse the parts used before the PCB exchange. ※２：Because spare PCB is commonized, by the model , extra connectors is implemented, compared with the former PCB. When connecting the connectors after exchanging the PCB, Check the color and name of the connectors, please note the faulty connections.
  • Page 134 '17 • KX-SM-261 2.5 Outdoor unit inverter PCB replacement procedure PCB012D057B Precautions for Safety ¡ Since the following precaution is the important contents for safety, be sure to observe them. WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if WARNING proper safety procedures and instructions are not adhered to.
  • Page 135 '17 • KX-SM-261 (Ａ) Control PCB voltage measurement points (Ｂ) Inverter PCB（INV1,2） voltage measurement points (DM (+) - DM(-)) Target PCB(INV2) (F1-DS(-)) Target PCB(INV1) Fig.2 Voltage measurement points Snubber capacitor Terminal Harness Inverter PCB Connection binder Power transistor （Metallic pillar） Procedure on tightening harness (snubber capacitor) and power transistor with screw.A metallic connection binder is set in each hole of the inverter PCB of "P", "N", "U", "V", and "W"...
  • Page 136 '17 • KX-SM-261 2.6 Outdoor unit transistor module replacement procedure PCB012D043C Precautions for Safety Since the following precaution is the important contents for safety, be sure to observe them. ・ WARNING and CAUTION are described as follows: WARNING Indicates an imminently hazardous situation which will result in death or serious injury if proper safety ！...
  • Page 137 '17 • KX-SM-261 '14 • KX-SM-221 2.7 Outdoor unit diode module replacement procedure PCB012D009C Precautions for Safety Since the following precaution is the important contents for safety, be sure to observe them. ・ WARNING and CAUTION are described as follows: Indicates an imminently hazardous situation which will result in death or serious injury if proper safety WARNING ！...
  • Page 138 '17 • KX-SM-261 ● Inspection method of faulty diode module When any error occurs on this unit as a result of ① trip of circuit breaker, ② inverter failure, ③ broken power transistor, ④ blown fuse, or other, it is necessary to suspect also for broken diode module. Since the diode module is not installed on the PCB of this unit, the “repeated circuit breaker trip”...
  • Page 139 SW5-1 Test run SW Normal★/Test run SW5-2 Test run mode Heating★/Cooling SW5-3 Pump down SW Normal★/Pump down '17 • KX-SM-261 SW5-4 Keep ON Heat recovery selection SW5-5 SL selector New SL (Auto)★/Old SL Spare Keep OFF SW5-6  Function of Dip switch for control (SW3, 4, 5) Spare Keep OFF SW5-7...
  • Page 140 '17 • KX-SM-261  Function of Connection (1) Control PCB input (2) Control PCB output Mark Connector Function Mark Connecter Function Tho-A CNTH Outdoor air thermistor 52X1 CNM1 Solenoid for CM1 Tho-R1 CNTH Heat exchanger thermistor 1 (Exit, Front) 52X2 CNM2 Solenoid for CM2 Tho-R2 CNB2...
  • Page 141 '17 • KX-SM-261 3. ELECTRICAL WIRING Models FDC224KXZRE1, 280KXZRE1, 335KXZRE1 PCB004Z089...
  • Page 142 '17 • KX-SM-261 Models FDC400KXZRE1, 450KXZRE1 PCB004Z090...
  • Page 143 '17 • KX-SM-261 Models FDC475KXZRE1, 500KXZRE1, 560KXZRE1 FDC615KXZRE1, 670KXZRE1 PCB004Z091...
  • Page 144 '17 • KX-SM-261 Models PFD1124-E, 1804-E, 2804-E PCB004Z116...
  • Page 145 '17 • KX-SM-261 Model PFD1124X4-E PCB004Z147...
  • Page 146 '17 • KX-SM-261 4. PIPING SYSTEM Models FDC224KXZRE1, 280KXZRE1, 335KXZRE1 PCB004Z092 PCB004Z092...
  • Page 147 '17 • KX-SM-261 Models FDC400KXZRE1, 450KXZRE1 Models FDC400KXZRE1, 450KXZRE1 PCB004Z093 PCB004Z093...
  • Page 148 '17 • KX-SM-261 Models FDC475KXZRE1, 500KXZRE1, 560KXZRE1 FDC615KXZRE1, 670KXZRE1 Models FDC475KXZRE1, 500KXZRE1, 560KXZRE1 FDC615KXZRE1, 670KXZRE1 PCB004Z094 PCB004Z094...
  • Page 149 '17 • KX-SM-261 5. APPLICATION DATA 5.1 Installation of outdoor unit Designed for R410A refrigerant PSC012D099A KXZ SERIES INSTALLATION MANUAL Outdoor unit capacity FD C224 –1680 ◎ to the respective installation manuals supplied with your units. ◎Please read this manual carefully before you set to installation work and carry it out according to the instructions contained in this manual. CAUTION WARNING Use the circuit breaker for all pole with correct capacity.
  • Page 150 '17 • KX-SM-261 Notabilia as a unit designed for R410A Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional   ● Dedicated R410A tools refrigerant. a） A cylinder containing R410A has a pink indication mark on the top. Gauge manifold A unit designed for R410A has adopted a different size indoor unit operation valve charge port and a different size check joint  ...
  • Page 151 ● Do not step onto the outdoor unit. ● You may incur injury from a drop or fall. '17 • KX-SM-261 Option parts】 Refrigerant distribution piping components supplied as option parts will become necessary in installing the unit. As refrigerant distribution piping components, branching pipe sets (model type: DOS) for the outdoor unit side piping, branching pipe sets (model type: DIS) for the indoor unit side piping are available.
  • Page 152 ※2 1000 High-COP combination (335+335+335) 3 80 800 1300 ※1 When connecting the indoor unit type FDK, FDFL, FDFU or FDFW series, limit the connectable capacity not higher than130%. ※2  '17 • KX-SM-261 3-2. Notabilia for installation (1) Anchor bolt positions  ...
  • Page 153 '17 • KX-SM-261 (2) Piping material selection Please use pipes clean on both the inside and outside and free from contaminants harmful to operation such as sulfur, oxides, dust, chips, oil, fat and water.   ● Use the following material for refrigerant piping.  ...
  • Page 154 '17 • KX-SM-261 Please choose from the table below an appropriate pipe size as determined by the total capacity of indoor units connected downstream, provided, however, that the pipe size for this section should not exceed the main size (Section B in Figure 1). In the downstream of a branching control, no gas discharge pipe needs to be connected.
  • Page 155 '17 • KX-SM-261 4-2. Pipe connection position and pipe direction (1) Pipe connecting position and pipe outgoing direction Although this drawing illustrates an installation involving a 450 or smaller capacity unit, an installation involving a 504 or a larger capacity unit should be arranged in the same manner as long as pipe connection points and directions are concerned, except that the height of a unit is different.
  • Page 156 - 1680 ※ For PFD1124×4-E model, calculate the number of units taking 1 branching control as 4 controls in this limit. '17 • KX-SM-261 (2) Piping work CAUTION Important If you tighten it without using double spanners, you may deform the service valve, which can cause an inflow of nitrogen gas Please take care so that installed pipes may not touch components within a unit.
  • Page 157 '17 • KX-SM-261 4-3. Air tightness test and air purge (1) Air tightness test ① 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.
  • Page 158 '17 • KX-SM-261 4-4. Additional refrigerant charge Charge additional refrigerant in the liquid state. Be sure to measure the quantity with a scale in adding refrigerant. If you cannot charge all refrigerant with the outdoor unit lying idle, charge it with the unit running in the test run mode. (For the test run method, please refer to Section 8) t during operation, complete the job within 30min.) This unit contains <11.5kg/unit>...
  • Page 159 For oil equalizing pipes '17 • KX-SM-261 4-5. Heating and condensation prevention ①Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation. Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc. ②Use a heat insulating material that can withstand 120℃...
  • Page 160 '17 • KX-SM-261 6-1. Wiring system diagrams (Example of combination) Outdoor unit power source: 3 phase 4wiring 380-415V Distributed, separate power source system A : Power cable (Main power cable) [4 cores] B : Signal wire (Superlink wire) [2 cores] C : Power cable (indoor unit power cable) [2 cores] Earth leakage breaker...
  • Page 161 '17 • KX-SM-261 Please note a) The method of laying cables has been determined pursuant to the Japanese indoor wiring regulations (JEAC8001). (Please adapt it to the regulations in effect in each country) b) In the case of distributed, separate power source system, the listed data represent those of an outdoor unit. c) For details, please refer to the installation manual supplied with the indoor unit.
  • Page 162 '17 • KX-SM-261 (2) When plural outdoor units are used (1) When one outdoor unit is used. Network connector Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor signal line Ａ1 terminal block A1 ・ B1 A2 ・ B2 A1 ・ B1 A2 ・ B2 A1 ・...
  • Page 163 '17 • KX-SM-261 Network connector Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit A1 ・ B1 A2 ・ B2 A1 ・ B1 A2 ・ B2 A1 ・ B1 A2 ・ B2 A1 ・ B1 A2 ・ B2 A1 ・...
  • Page 164 refrigerant line to A2 and B2. This may interrupt proper address setting. (Case 3) Do not connect the signal line between indoor unit and outdoor unit to A2 and B2. This may interrupt proper address setting. (Case 4) ※2 In Case 2, automatic address setting is not available. Set addresses manually. '17 •...
  • Page 165 '17 • KX-SM-261 ② Address setting of indoor unit Before turning on the power, set as follows. Make sure that the Indoor Unit No. switch is set to 000 (factory setting). Make sure that the Outdoor Unit No. switch is set to 49 (factory setting). ③...
  • Page 166 '17 • KX-SM-261 ・Within a refrigerant system, indoor units are assigned addresses in the order they are recognized by the outdoor unit. Therefore, they are not necessarily assigned addresses in ・Make sure that power has been turned on to all indoor units. ・When addresses are set, you can have the registered indoor unit address No.
  • Page 167 Indoor unit Indoor unit Indoor unit Indoor unit '17 • KX-SM-261 (2) When plural indoor units are connected to the remote control. ● When plural indoor units are connected, you can change their addresses without altering their cable connection. Item Operation Display ①...
  • Page 168 P.18 '17 • KX-SM-261 7-segment display indication in automatic address setting ● Items that are to be set by the customer Code Contents of a display Communication protocol 0: Previous SL mode (The communication plotocol is displayed ; display only)                     1: New SL mode Automatic address start Input starting address Specify a starting indoor unit address in automatic address setting.
  • Page 169 '17 • KX-SM-261 7-2. Change of control 7-4. Contents of control for outdoor unit can be changed with dipswitches on PCB and P○○ on 7-segment indicator. When changing P ○○ on 7-segment indicator, it can be set by holding down SW8 (7-segment indicator UP: Ones digit), SW9 (7-segment indicator UP: Tens digit) and SW7 (Data write/Enter) When coolin Method to change control...
  • Page 170 '17 • KX-SM-261 7-4. Installation of indoor unit at the downstream of branching control te/Enter) When installing more than one indoor unit at the downstream from a branching control, set it such a manner that all of them will be operated in the same cooling/heating mode, by either one of the following methods.
  • Page 171 '17 • KX-SM-261 8. TEST OPERATION AND TRANSFER 8-1. Before starting operation (1) Make sure that a measurement between the power source terminal block and ground, when measured with a 500V megger, is greater than 1 MΩ. When the unit is left for a long time with power OFF or just after the installation, there is possibility that the refrigerant is accumulated in the compressor and the insulation resistance between the contact terminals for power source and grounding decreases to 1MΩ or around.
  • Page 172 P.22 '17 • KX-SM-261 Error display on 7-segment indicator after ending the check operation Code indicato Data indicator Display contents Check following points ・ Isn’t the service valve of outdoor unit left open? Operation valve is closed. ・ Is the low pressure sensor normal? (Detected pressure can be seen on (Refrigerant circuit is shut off partially.) the 7-segment indicator.)
  • Page 173 '17 • KX-SM-261 PSC012D093C 5.2 Instructions for installing the branch pipe set PSC012D093C ◎ This manual describes the specifications of branching pipe set installation. For outdoor unit installation and indoor unit installation, please refer to the respective installation manuals supplied with your outdoor unit and indoor unit. ◎...
  • Page 174 '17 • KX-SM-261 DOS-2A-3-R DOS-3A-3-R 1 pc. 1个...
  • Page 175 '17 • KX-SM-261...
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  • Page 177 '17 • KX-SM-261 5.3 Branching control installation guide PCB012D067 BRANCHING CONTROLLER INSTALLATION GUIDE FOR COOLING/HEATING FREE MULTI INSTALLATIONS PCB012D067 Indoor units are the same with those of Inverter Multi specifications. Please lay refrigerant piping, electrical cables (including signal wires) and operate units according to this installation guide, indoor and outdoor unit installation manuals. Precautions for safety Read the “SAFETY PRECAUTIONS”...
  • Page 178 '17 • KX-SM-261 1. BEFORE BEGINNING INSTALLATION 1. BEFORE BEGINNING INSTALLATION ① Limitation on the number of branching controls which can be connected to a outdoor unit is as follows. ① Limitation on the number of branching controls which can be connected to a outdoor unit is as follows. Outdoor unit Minimum number of units to be able to connect Outdoor unit...
  • Page 179 '17 • KX-SM-261 3. REFRIGERANT PIPING 3. REFRIGERANT PIPING A branching control has on its main body beneath the connection ports such indications as “S.G (OUT),” “D.G (OUT)” and “G (IN)” provided for the ○ A branching control has on its main body beneath the connection ports such indications as “S.G (OUT),” “D.G (OUT)” and “G (IN)” provided for the ○...
  • Page 180 '17 • KX-SM-261 4. ELECTRICAL WIRING WORK 4. ELECTRICAL WIRING WORK Relay kit Relay kit (an accessory to a branching control) Please implement cabling according to the instructions (an accessory to a branching control) Please implement cabling according to the instructions ○...
  • Page 181 '17 • KX-SM-261 '14 • KX-SM-202 5.4 Procedure to attach or remove the front panel Purpose • Easier to find the holes to fit the screws • Improves serviceability Point of change • Holes of the pancle are bigger （φ 7 （ KX6 ） → φ 8 （ KXZ ） ） • Hooks have been added Assembly and removal of front panel • Removal Left front panel: ①...
  • Page 182 '17 • KX-SM-261 5.5 Installation work check sheet Site name and system name Checker: section, name Date Please write the model name and serial number. Sorting Check item Standard Result Action or value Date 1.Indoor Is the installation space within Check the technical manual.(Flow pattern, unit allowable limit?
  • Page 183 '17 • KX-SM-261 Sorting Check item Standard Result Action or value date 3.System Is the material of refrigerant piping genuine? Phosphorus deoxidized seamless copper pipe C1220T, JIS H 3300 Is the length of refrigerant piping within Check with the technical manual. The length of piping: allowable limit? The pipe length between the outdoor unit...
  • Page 184 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

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