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Mitsubishi Heavy Industries KXZW Series Service Manual

Vrf inverter multi-system air-conditioners
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SERVICE MANUAL
SERVICE MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
KXZW Heat source units
 
Water cooled series
Single use (Used also for combination)
FDC224KXZWE1, 280KXZWE1, 335KXZWE1
Combination use
FDC450KXZWE1, 500KXZWE1, 560KXZWE1, 615KXZWE1, 670KXZWE1, 730KXZWE1, 775KXZWE1,
850KXZWE1, 900KXZWE1, 950KXZWE1, 1000KXZWE1
Note:
• 
(1) Regarding the Indoor unit series, refer to the No.'14  
Manual No. '14
updated March 30, 2018
KX-DB-206
• 
KX-SM-200
•

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Summary of Contents for Mitsubishi Heavy Industries KXZW Series

  • Page 1 Manual No. '14 KX-SM-200 • updated March 30, 2018 SERVICE MANUAL SERVICE MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS KXZW Heat source units   Water cooled series Single use (Used also for combination) FDC224KXZWE1, 280KXZWE1, 335KXZWE1 Combination use FDC450KXZWE1, 500KXZWE1, 560KXZWE1, 615KXZWE1, 670KXZWE1, 730KXZWE1, 775KXZWE1, 850KXZWE1, 900KXZWE1, 950KXZWE1, 1000KXZWE1 Note: • ...
  • Page 2 '14 • KX-SM-200 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 '14 • KX-SM-200 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 Remote control (option parts) Wired remote control (a) Model RC-EX1A All icons are shown for the sake of explanation. ⑦ Clock, R/C name display ⑤ LCD display (With backlight) A tap on the LCD lights the backlight. Displays the current time and The backlight turns off automatically if there is no the name of R/C...
  • Page 4 '14 • KX-SM-200 Wired remote control (b) 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 '14 • KX-SM-200 Wireless remote control Indication section Indicates set temperature. Indicates the status of swing louver. Indicates selected operation with Indicates the selected airflow volume Indicates for two seconds when FILTER button is pressed. Indicates when ON-TIMER is set. Indicates when OFF-TIMER is set.
  • Page 6 '14 • KX-SM-200 1.2 Operation control function by the wired remote control Model RC-EX1A (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. (c) When the operation mode is selected, the display returns to the TOP screen.
  • Page 7 '14 • KX-SM-200 • Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode are cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.
  • Page 8 '14 • KX-SM-200 Operation and setting from remote control ⑥ Operation and setting from remote control A: Refer to the instruction manual for RC-EX series. B: Refer to the installation manual for RC-EX series. C: Loading a utility software vie Internet ○: Nearly same function setting and operations are possible.
  • Page 9 '14 • KX-SM-200 ⑥ Operation and setting from remote control (continued) RC-EX RC-E4 Setting & display item Description series RC-E5 Ａ  11． Administrator settings [Administrator password] ・ Enable/Disable setting of operation can be set. [On/Off] [Change set temp.] [Change operation mode] [Change air flow direction] 1 Enable/Disable setting [Individual flap control setting][Fan speed] [High power operation] [Energy-saving operation] [Timer settings] [Weekly timer setting] Ａ ...
  • Page 10 '14 • KX-SM-200 Model RC-E5 Switching sequence of the operation mode switches of remote control COOL HEAT 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. Power failure compensation function (Electric power source failure) •...
  • Page 11 '14 • KX-SM-200 1.3 Operation control function by the indoor control Operations of functional items during cooling/heating Cooling Heating Operation Dehumidifying Thermostat Thermostat Thermostat Thermostat Hot start (Defrost) Functional item Compressor � � � � � � �/� 4-way valve �...
  • Page 12 '14 • KX-SM-200 (vii) Combination of patterns which can be set for the timer operations Weekly timer Sleep time Set OFF timer by hour Set ON timer by hour Set OFF timer by clock Set ON timer by clock Sleep time �...
  • Page 13 '14 • KX-SM-200 Thermostat ON i) When the heat exchanger thermistor (ThI-R1 or R, whichever higher) detects °C or lower, the fan is turned OFF and does not operate. ii) When the heat exchanger thermistor (ThI-R1 or R, whichever higher) detects °C or higher, the fan operates with the fan control at heating thermostat OFF.
  • Page 14 '14 • KX-SM-200 (b) RC-E5 (i) Louver control Press the “LOUVER” button to operate the swing louver when the air-conditioner is operating. “SWING ” is displayed for  seconds and then the swing louver moves up and down continuously. To fix the swing louver at a position, press one time the “LOUVER” button while the swing louver is moving so that four stop positions are displayed one after another per second.
  • Page 15 '14 • KX-SM-200 (c) Fan control during heating thermostat OFF (i) Following fan controls during the heating thermostat OFF can be selected with the indoor function setting of the wired remote control. ① Low fan speed (Factory default), ② Set fan speed, ③ Intermittence, ④ Fan OFF (ii) When the “Low fan speed (Factory default)”...
  • Page 16 '14 • KX-SM-200 Filter sign As the operation time (Total ON time of ON/OFF switch) accumulates to 10 hours , “FILTER CLEANING” is displayed on the remote control. (This is displayed when the unit is in trouble and under the centralized control, regardless of ON/OFF) Note (1) T ime setting for the filter sign can be made as shown below using the indoor function of wired remote control “FILTER SIGN SET”. (It is set at TYPE 1 at the shipping from factory.) Filter sign setting...
  • Page 17 '14 • KX-SM-200 (12) Drain motor (DM) control Drain detection switch is turned ON or OFF with the float switch (FS) and the timer. Drain detection switch ON Normal state Normal state [*1] [*2] [ ＊ 1] Drain detection switch is turned “ON” when the float switch “Open” is detected for 3 seconds continuously in the drain detectable space. [ ＊ 2] Drain detection switch is turned “OFF” when the float switch “Close” is detected for 10 seconds continuously. It detects always from 0 seconds after turning the power ON. There is no detection of anomalous draining for 10 seconds after turning the drain pump OFF. Turning the drain detection switch “ON”...
  • Page 18 '14 • KX-SM-200 (15) Anomalous fan motor After starting the fan motor, if the fan motor speed is 200min or less is detected for 30 seconds continuously and 4 times within 60 minutes, then fan motor stops with the anomalous stop (E16). (b) If the fan motor fails to reach at -0(FDU: -00) min less than the required speed, it stops with the anomalous stop (E0).
  • Page 19 '14 • KX-SM-200 (a) Output for external control (remote display) Following output connectors (CnT) are provided on the indoor control PCB for monitoring operation status. ① Operation output: Outputs DC1V signal for driving relay during operation ② Heating output: Outputs DC1V signal for driving relay during heating operation ③...
  • Page 20 '14 • KX-SM-200 (19) Operation permission/prohibition (In case of adopting card key switches or commercially available timers) When the indoor function setting of wired remote control for “Operation permission/prohibition” is changed from “Invalid (Factory default)” to “ Valid”, following control becomes effective. ・...
  • Page 21 '14 • KX-SM-200 (b) In case of CnT ③ Operation permission/prohibition level + CnTA ③ Operation permission/prohibition level Operation permission Operation permission Operation Operation permission permission prohibition setting Operation CnTA Operation permission permission Operation Operation permission/ permission prohibition setting Operation Operation permission permission Operation permission/...
  • Page 22 '14 • KX-SM-200 (d) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote control. ■ Selection of cooling/heating external input function External input selection External input method Operation External terminal input (CnT or CnTA) Cooling zone Heating zone...
  • Page 23 '14 • KX-SM-200 (26) Home leave mode (RC-EX1A only) When the unit is not used for a long period of time, the room temperature is maintained at a moderate leval, avoiding extremely hot or cool temperature. Cooling or heating is operated according to the outdoor temperature (factory setting °C for cooling, 0°C for heating) and the set temperature.
  • Page 24 pattern Thermo Thermo Stop Stop '14 • KX-SM-200 All cooling operation ○ （○） （○） × × × All heating operation Low pressure under high water 1.4 Operation control function by the heat source unit control × × × （○） （○） ○...
  • Page 25 '14 • KX-SM-200 I n the event that agreement of operation mode is lost between indoor units and heat source units by selecting the first or second priority after determining the operation mode, it is changed forcibly to the “Fan” mode. The operation mode LCD flickers to warn the “Mode unmatch” Example of operation mode selection <First unit’s operation mode> ① If both of indoor units 0 and 1 have the same operation mode, it operates with the mode. Indoor unit 0 Stop Cooling...
  • Page 26 '14 • KX-SM-200 (d) Forced cooling /heating operation (Master unit) (Note) Following explanation is based on using CnG1 terminal and setting function [P0]-[] with -segment display. However other terminals can be used with following function setting of -segment display. CnS1: [P0]-[] CnS: [P0]-[] CnG: [P10]-[] When SW- on the heat source unit control PCB is turned ON after setting function [P0]-[] with -segment dis-...
  • Page 27 '14 • KX-SM-200 2) 2 heat source unit combination use (Model 450, 500, 560, 615, 670) Master unit Slave unit CM01 CM11 (CM1) (CM1) Range of the compressor operation frequency relative to load is as follows. Following table is applicable when CM01 starts initially. System load range Local load range Master unit...
  • Page 28 '14 • KX-SM-200 (5) Defrosting The time conditions for defrosting only is implemented for the heating oil return operation. 〔 Time conditions for defrosting 〕 (a) Starting condition When all of following conditions ①～⑦ are established ①　 Heat source unit operation mode: Heating ②　...
  • Page 29 '14 • KX-SM-200 (6) Protective control (a) High pressure protective control/error If the high pressure exceeds . MPa, the compressor speed is reduced gradually. It reduces to 0 rps at the lowest. If the high pressure still rises to .1 MPa, the compressor stops. (b) Low pressure protective control/error If the low pressure drops below 0.1 MPa, the compressor speed is reduced gradually.
  • Page 30 '14 • KX-SM-200 Option controls • External input terminal ① 4 External input terminals (CnS1, CnS2, CnG1 and CnG2) are provided. (See Fig-1) ② Each external input terminal can be changed its function by allotting the external input function No. of P07-P10 selected with 7-segment respectively.
  • Page 31 '14 • KX-SM-200 Operation permission/prohibition control by the external input CnS1 to heat source unit. Switching CnS1 CnS1: Switching operation Input: CnS1 input method:J13 permission/prohibition mode Operation prohibition mode Shorted Shorted (Level input) Operation permission mode Switching operation permission/ Open (Pulse input) Open Operation prohibition mode (Reversal) Operation permission mode...
  • Page 32 '14 • KX-SM-200 Demand control/Normal operation by the external input CnS2 to heat source unit. CnS2: Switching operation Switching CnS2 Input: CnS2 input method:J13 permission/prohibition mode Shorted Demand control Shorted (Level input) Normal operation Switching Demand control/ Open (Pulse input) Normal operation (Reversal) Open Normal control...
  • Page 33 '14 • KX-SM-200 (c) 2-step demand control Starting condition When the “2-step demand input” via the external input terminal of heat source unit (master unit) has become valid. Contents of control The demand control is performed at the demand rate which has been set with [SW4-5, SW4-6] and [P04] according - to the demand input or the 2-step demand input.
  • Page 34 '14 • KX-SM-200 (2) Auto backup operation (a) Classi cation of auto backup operations When the auto backup operation is enabled, anomaly stops are classifiedas follows and countermeasures are provided for respective categories. System stop: All stop including master/slave units of compressor Unit stop: Stop in the unit of heat source unit of compressor (b) Control contents of auto backup operation Condition of auto backup operation is established when the dip switch SW- on the PCB of master unit is turned...
  • Page 35 '14 • KX-SM-200 Anomalous stop of master heat source unit Anomalous stop of slave heat source unit Remote control Anomaly contents error display System stop Unit stop System stop Unit stop Duplicated heat source unit address No. Open L Phase on power source at primary side Discharge pipe temperature error Heat source unit heat exchanger and subcooling coil temperature thermistor anomaly...
  • Page 36 '14 • KX-SM-200 (3) 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 -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 '14 • KX-SM-200 (4) Operation and error signal output (Master unit/Slave unit) This is the function to retrieve and display the operation and error information on the heat source 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 heat source unit.
  • Page 38 '14 • KX-SM-200 : Compressor ON output ·It is turned ON, when the compressor is ON : 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. : When HP is relatively high ·Signal is output in order to operate a sprinkler system for cooling down the heat source unit heat exchanger.
  • Page 39 '14 • KX-SM-200 (7) VTCC : Variable Temperature and Capacity Control (VRF inverter multi-system energy save control) On the multi-system, target pressures are set uniformly so that indoor units operate with a constant capacity and repeat the ON/ OFF control with which thermostats are turned OFF when temperatures become near the setting temperature. Owing to the tuning of target high/low pressure near the setting temperature, it becomes possible to perform the high efficiency operation near the setting temperature.
  • Page 40 '14 • KX-SM-200 '14 • KX-SM-200 (C) Data output (1) 7-segment display and operation data retention (a) 7-segment display Operation information is displayed for checking various operation data during test run and for helping malfunction diag- nosis at servicing. Input data to microcomputer, contents of heat source unit control, registration information of indoor units and etc.
  • Page 41 '14 • KX-SM-200 '14 • KX-SM-200 When Special display occurs [CXX] Special display Button operation When Special display reset No operation for 10 seconds* Automatic feeding Button operation [C99] * If the special display is reset in the meanwhile, it remains [CXX]. [C49] Sub-cooling degree at cooling mode = High pressure saturated temperature ( ) detected with high pressure sensor (PHS)
  • Page 42 '14 • KX-SM-200 '14 • KX-SM-200 < Operation information > Code Data display Minimum Contents of display Remarks range unit Unusual [Exx] code Warning [oPx][oPE-X] code [PdS][PdE] Special code [CH ][CHF][CO ][HE ][PCL][dLP] < Information for sensor or actuator value > CM1 operating frequency 0~130 Tho-A Atmosphere air temp.
  • Page 43 '14 • KX-SM-200 '14 • KX-SM-200 Code Data display Minimum Contents of display Remarks range unit 20SM Order of 100 : Spare 20SH Order of 10 : 20SM − Order of 1 : 20SH (0: Close, 1: Open) Order of 100 : FMC Order of 10 : Spare −...
  • Page 44 '14 • KX-SM-200 '14 • KX-SM-200 Code Data display Minimum Contents of display Remarks range unit Displays No. of the protection control of which effect is the strongest 0~127 Protection control causes 1 among those occurred from the start of operation after the power on Displays No.
  • Page 45 '14 • KX-SM-200 '14 • KX-SM-200 Code Data display Minimum Contents of display Remarks range unit < New Superlink setting > 0: Current Superlink Superlink communication status 0, 1 — 1: New Superlink 0: (Factory default) 0: Automatic address setting standby —...
  • Page 46 '14 • KX-SM-200 '14 • KX-SM-200 [C67] Protection control status <Definition of signal> Shows the status of protection control in operation currently. If two or more controls among the following protection controls are established simultaneously, No. of the control of which number is larger is displayed.
  • Page 47 '14 • KX-SM-200 '14 • KX-SM-200 (b) Saving of operation data For the purpose to investigate the cause of trouble in the field, the operation data are always saved in thememory, 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 RS232C connector on the heat source unit control PCB and utilized for probing the cause.
  • Page 48 '14 • KX-SM-200 '14 • KX-SM-200 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 0~255 Indoor unit 1 Answer frequency 0~255...
  • Page 49 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Tho-H Sub-cooling coil temp. 2 -40~75 0.01°C Injection suction pipe temp. 1 (spare) -40~75 0.01°C Tho-J Receiver liquid surface detection -40~75 0.01°C temp.
  • Page 50 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Under-dome super heat CM1 0~25.5 0.1deg Super heat of water heat exchanger exit 0~25.5 0.1deg Target FK 0~65535 Inverter CM1 operation frequency 0~255 Spare —...
  • Page 51 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes < Compressor > Compressor 1 cumulative operating time (estimate) 0~65535 — — Spare Compressor 1 start times 0~65535 20times Spare —...
  • Page 52 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes 0: Normal Heat source unit heat exchanger Bit3 refrigerant purge 1: Practice 0: Normal Indoor heat exchanger Bit4 refrigerant purge 1: Practice 0: Normal Evaporative air handling...
  • Page 53 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes 0: Normal PT protection 1 Bit2 Compressor capacity control 1: Practice PT protection 2 0: Normal Bit3 Inverter cooling fan control 1: Practice 0: Normal Bit4...
  • Page 54 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Spare — — EEPROM memory. Resettable. Counter ･ Indoor-heat source unit communications error 0~255 — EEPROM memory. Resettable. Counter ･ CPU reset 0~255 —...
  • Page 55 '14 • KX-SM-200 '14 • KX-SM-200 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Bit4 0: OFF 1: ON SW4-5 Bit5 SW4-6 0: OFF 1: ON Bit6 SW4-7 0: OFF 1: ON Bit7 SW4-8 0: OFF 1: ON Bit0 SW5-1...
  • Page 56 '14 • KX-SM-200 '14 • KX-SM-202 '14 • KX-SM-200 (2) Heat source unit PCB setting Code Input Remarks Heat source unit address No. (Order of 10) Heat source unit address No. (Order of 1) SW3-1 Inspection LED reset Normal /Reset SW3-2 Auto backup operation None /With...
  • Page 57 '14 • KX-SM-200 '14 • KX-SM-200 (3) Indoor PCB setting Code Input Default setting Remarks Indoor unit address No.(Order of 10) Indoor unit address No.(Order of 1) Heat source unit address No.(Order of 10) Heat source unit address No.(Order of 1) SW5-1 Superlink selection Automatic*/Previous SL...
  • Page 58 '14 • KX-SM-200 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) •...
  • Page 59 '14 • KX-SM-200 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 and E45. Power OFF (Power source circuit breaker OFF) Be sure to wait for 3 minutes after turning the power circuit breaker off.
  • Page 60 '14 • KX-SM-200 '14 • KX-SM-200 2.3 Contents of troubleshooting 2.3 Contents of troubleshooting (a) List of inspection displays (a) List of inspection displays Indoor and heat source unit Indoor and heat source units Remote 7-segment control Name of inspection Classification Page display error code – Remote control communication error Communication error –...
  • Page 61 '14 • KX-SM-200 (b) Troubleshooting Green Error code Content Keeps flashing Stays OFF None Indoor unit Operates but does not cool Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation.
  • Page 62 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit None Operates but does not heat Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation.
  • Page 63 '14 • KX-SM-200 Green Green Error code Content Content Error code Stays OFF Stays OFF Stays OFF Earth leakage breaker activated Stays OFF None Indoor unit Indoor Earth leakage breaker activated None Remote control: Remote control: – 7-segment display: 7-segment display: Stays OFF Stays OFF Stays OFF Stays OFF...
  • Page 64 '14 • KX-SM-200 Green Content Error code – – Indoor unit None Excessive noise/vibration (1/3) Remote control: – 7-segment display: – – Heat source unit 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...
  • Page 65 '14 • KX-SM-200 Green Content Error code – – Indoor unit None Excessive noise/vibration (2/3) Remote control: – 7-segment display: – – Heat source unit 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...
  • Page 66 '14 • KX-SM-200 Green Content Error code – – Indoor unit None Excessive noise/vibration (3/3) Remote control: – 7-segment display: – – Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ [Adjustment heating problem happens during commissioning]...
  • Page 67 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit None Louver motor anomaly Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure � Check at the indoor unit side. Operate after waiting for more than 1 minute.
  • Page 68 '14 • KX-SM-200 Green Power source system anomaly Content Error code Stays OFF Stays OFF Indoor unit None Remote control: (Power source to indoor unit PCB) – 7-segment display: Stays OFF 2-time flash Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 69 '14 • KX-SM-200 Green Content Error code Power source system error Stays OFF Keeps lighting Indoor unit None (Power source to remote control) Remote control: – 7-segment display: Stays OFF Keeps lighting Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 70 '14 • KX-SM-200 Green Content Error code WAIT Indoor unit Keeps flashing Stays OFF Remote control: WAIT – 7-segment display: Heat source unit Keeps flashing Keeps flashing 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...
  • Page 71 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Remote control: WAIT WAIT – 7-segment display: Keeps flashing Keeps flashing Heat source unit 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...
  • Page 72 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Remote control: WAIT WAIT – 7-segment display: Keeps flashing Keeps flashing Heat source unit 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 73 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Remote control: WAIT WAIT – 7-segment display: Keeps flashing Keeps flashing Heat source unit 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...
  • Page 74 '14 • KX-SM-200 Green Content Error code Stays OFF Stays OFF Indoor unit Remote control: WAIT WAIT – 7-segment display: Stays OFF Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that LED on heat source unit control PCB stays In case that LED on OFF.)
  • Page 75 '14 • KX-SM-200 Green Content Error code Stays OFF Stays OFF Indoor unit Remote control: WAIT WAIT – 7-segment display: Stays OFF Stays OFF Heat source unit 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 76 '14 • KX-SM-200 Green Content Error code Stays OFF Stays OFF Indoor unit [No display] Remote control: [No display] – 7-segment display: Stays OFF Stays OFF Heat source unit 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 77 '14 • KX-SM-200 Green Content Error code Remote control Keeps flashing Stays OFF Indoor unit Remote control: communication error – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by temporary reset normally by the power noise.
  • Page 78 '14 • KX-SM-200 Green Content Error code Keeps flashing Keeps flashing Indoor unit Duplicated indoor unit address Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the number of Review number of connected indoor units up connected units.
  • Page 79 '14 • KX-SM-200 Green Content Error code Keeps flashing 2-time flash Indoor unit E3/5 Heat source unit signal line error Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E3 is a communication error that occurs when communication between indoor and heat source units is not established at all.
  • Page 80 '14 • KX-SM-200 Green Content Error code Keeps flashing *See below Indoor unit Communication error during operation Remote control: – 7-segment display: Keeps flashing 2-time flash Heat source unit 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 heat source unit terminal block.
  • Page 81 '14 • KX-SM-200 Green Indoor heat exchanger Content Error code Keeps flashing 1-time flash Indoor unit Remote control: temperature thermistor anomaly (ThI-R) – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Insert the connector the connector of...
  • Page 82 '14 • KX-SM-200 Green Indoor return air Content Error code Keeps flashing 1-time flash Indoor unit Remote control: temperature thermistor anomaly (ThI-A) – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector...
  • Page 83 '14 • KX-SM-200 Green Content Error code Keeps flashing 1-time flash Indoor unit Drain trouble Remote control: – 7-segment display: Keeps flashing Stays OFF Heat source unit 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.
  • Page 84 '14 • KX-SM-200 Green Content Error code Excessive number of indoor units (more than 17 units) Keeps flashing Stays OFF Indoor unit Remote control: by controlling one remote control – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1.
  • Page 85 '14 • KX-SM-200 Green Content Error code Address setting error between Keeps flashing Stays OFF Indoor unit Remote control: master and slave indoor units – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs...
  • Page 86 '14 • KX-SM-200 Green Content Error code Address setting error Keeps flashing Keeps flashing Indoor unit Remote control: by mixed setting method – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't the automatic setting and...
  • Page 87 '14 • KX-SM-200 Indoor DC fan motor anomaly Green Error code Content Keeps flashing 1(2)-time flash Indoor Remote control: E16 (FDT, FDTC, FDTW, FDTS, FDU, FDUM 7-segment display: FDUT71, FDK, FDFW, FDU-F series) Keeps flashing Stays OFF Outdoor Note (1) Value in ( ) is for the FM2 only. 5.Troubleshooting 1.Applicable model FDT, FDTC, FDTW, FDTS,...
  • Page 88 '14 • KX-SM-200 Green Content Error code Address setting error of Keeps flashing 1-ime flash Indoor unit Remote control: master and slave indoor units – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the address...
  • Page 89 '14 • KX-SM-200 Green Content Error code Indoor unit operation check, Keeps flashing 1-time flash Indoor unit Remote control: drain motor check mode anomaly – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the...
  • Page 90 '14 • KX-SM-200 Indoor DC fan motor Green Error code Content rotation speed anomaly Keeps flashing 1(2)-time flash Indoor Remote control: E20 (FDT, FDTC, FDTW, FDTS, FDU, FDUM 7-segment display: Keeps flashing Stays OFF Outdoor FDUT71, FDK, FDFW, FDU-F series) Note (1) Value in ( ) is for the FM2 only. 5.Troubleshooting 1.Applicable model FDT, FDTC, FDTW, FDTS,...
  • Page 91 '14 • KX-SM-200 Green Content Error code Defective panel switch Keeps flashing 1-time flash Indoor unit Remote control: operation (FDT) – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model FDT series only Diagnosis Countermeasure Reset the error and close Is grill opened? the grill.
  • Page 92 '14 • KX-SM-200 Green Content Error code Remote control Keeps flashing Stays OFF Indoor unit Remote control: temperature thermistor anomaly (Thc) – 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector thermistor connected...
  • Page 93 '14 • KX-SM-200 Green Content Error code Unmatch connection of Keeps flashing Stays Off Indoor unit Remote control: indoor and heat source unit 7-segment display: Keeps flashing 1 time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Is the...
  • Page 94 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Duplicated heat source unit address No. Remote control: 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 95 '14 • KX-SM-200 Green Content Error code Open L3 Phase on Keeps flashing Stays OFF Indoor unit Remote control: power source at primary side 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of...
  • Page 96 '14 • KX-SM-200 Green Discharge pipe temperature Content Error code Keeps flashing Stays OFF Indoor unit Remote control: error (Tho-D1) E36-1*1 7-segment display: Keeps flashing Heat source unit *1 E36-1: Tho-D1 *2 E36-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure...
  • Page 97 '14 • KX-SM-200 Heat source unit heat exchanger Green Content Error code temperature thermistor (Tho-R) and sub-cooling coil Keeps flashing Stays OFF Indoor unit Remote control: temperature thermistor (Tho-SC,-H) anomaly E37-1, 2, 5, 6*1 7-segment display: Keeps flashing Heat source unit *1 E37-1: 1-time flash (Tho-R1), E37-2: 2-time flash (Tho-R2), E37-5: 5-time flash (Tho-SC), E37-6: 6-time flash (Tho-H) 5.
  • Page 98 '14 • KX-SM-200 Green Atmosphere air temperature Content Error code Keeps flashing Stays OFF Indoor unit Remote control: thermistor anomaly (Tho-A) 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 99 '14 • KX-SM-200 Green Content Error code Discharge pipe temperature Keeps flashing Stays OFF Indoor unit Remote control: thermistor anomaly (Tho-D1) E39-1*1 7-segment display: Keeps flashing Heat source unit *1 E39-1: Tho-D1 *2 E39-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure...
  • Page 100 '14 • KX-SM-200 Green High pressure anomaly Content Error code Keeps flashing Stays OFF Indoor unit Remote control: (63H1 activated) 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of operating condition.
  • Page 101 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit E41(E51) Remote control: Power transistor overheat E41(E51)-1, 2*1 7-segment display: Keeps flashing Heat source unit *1 E41-1 (E51-1) : CM1 *2 E41-1 (E51-1) : 1-time flash 5. Troubleshooting 1.
  • Page 102 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Remote control: Current cut (CM1) E42-1*1 7-segment display: Keeps flashing Heat source unit *1 E42-1: CM1 *2 E42-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Save data for 30 minutes before stopping in Mente PC.
  • Page 103 '14 • KX-SM-200 Green Content Error code Excessive number of indoor units connected, Keeps flashing Stays OFF Indoor unit Remote control: excessive total capacity of connection E43-1, 2 *1 7-segment display: Keeps flashing Heat source unit *1 E43-1/1-time flash: Excessive number of indoor units connected, E43-2/2-time flash:Excessive capacity of connection 5.
  • Page 104 '14 • KX-SM-200 Green Content Error code Liquid flooding anomaly Keeps flashing Stays OFF Indoor unit (CM1) Remote control: E44-1*1 7-segment display: Keeps flashing Heat source unit *1 E44-1: CM1 *2 E44-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source units Diagnosis Countermeasure Check and save the data of...
  • Page 105 '14 • KX-SM-200 Green Content Error code Communication error between Keeps flashing Stays OFF Indoor unit Remote control: inverter PCB and heat source unit control PCB E45-1*1 7-segment display: Keeps flashing Heat source unit *1 E45-1: INV1 *2 E45-1: 1-time flash 5.
  • Page 106 '14 • KX-SM-200 Green Content Error code Mixed address setting methods Keeps flashing Stays OFF Indoor unit Remote control: coexistent in same network 7-segment display: Keeps flashing Stays OFF Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of...
  • Page 107 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Remote control: Low pressure anomaly 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of operating conditions Save data for 30 minutes before stopping in Mente PC.
  • Page 108 '14 • KX-SM-200 Green Content Error code Suction pipe temperature thermistor anomaly (Tho-S), Keeps flashing Stays OFF Indoor unit E53/E55*1 Remote control: E53/E55-1 Under-dome temperature thermistor anomaly (Tho-C1) 7-segment display: Keeps flashing Heat source unit *1 E55-1 : Tho-C1 *2 E53 : E53·E55-1-time flash 5.
  • Page 109 '14 • KX-SM-200 Green Content Error code High pressure sensor anomaly (PSH) Keeps flashing Stays OFF Indoor unit Remote control: E54-1, 2 *1 Low pressure sensor anomaly (PSL) 7-segment display: Keeps flashing Heat source unit *1 E54-1: 1-time flash (PSL), E54-2 : 2-time flash (PSH) 5.
  • Page 110 '14 • KX-SM-200 Green Content Error code Power transistor temperature Keeps flashing Stays OFF Indoor unit Remote control: thermistor anomaly (Tho-P1) E56-1*1 7-segment display: Keeps flashing Heat source unit *1 E56-1/1-time flash:Tho-P1 anomaly 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of...
  • Page 111 '14 • KX-SM-200 Green Content Error code Anomalous compressor Keeps flashing Stays OFF Indoor unit Remote control: by loss of synchronism E58-1*1 7-segment display: Keeps flashing Heat source unit *1 E58-1: CM1 *2 E58-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure...
  • Page 112 '14 • KX-SM-200 Green Compressor startup Content Error code Keeps flashing Stays OFF Indoor unit Remote control: failure (CM1) E59-1*1 7-segment display: Keeps flashing Heat source unit *1 E59-1: CM1 *2 E59-1: 1-time flash 5. Troubleshooting 1. Applicable model Heat source unit Diagnosis Countermeasure Check and save the data of...
  • Page 113 '14 • KX-SM-200 Green Content Error code Communications error between Keeps flashing Stays OFF Indoor unit Remote control: the master unit and slave units E61-1, 2 *1 7-segment display: Keeps flashing Heat source unit *1 E61-1/1-time flash: Slave unit 1, E61-2/2-time flash: Slave unit 2 5.
  • Page 114 '14 • KX-SM-200 Green Content Error code Keeps flashing Stays OFF Indoor unit Emergency stop Remote control: 7-segment display: Keeps flashing 1-time flash Heat source unit 5. Troubleshooting 1. Applicable model Indoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
  • Page 115 '14 • KX-SM-200 2.4 Heat source unit control PCB replacement procedure PCB012D045B 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 WARNING if proper safety procedures and instructions are not adhered to.
  • Page 116 '14 • KX-SM-200 ※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 117 '14 • KX-SM-200 2.5 Heat source unit inverter PCB replacement procedure PCB012D018B 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 WARNING if proper safety procedures and instructions are not adhered to.
  • Page 118 '14 • KX-SM-200 Connectors are not After elapsing 3 minutes half inserted from power OFF Inverter PCB voltage measurement point (DM(+) - DM(-)) Target PCB Fig.2 Voltage Measurement Point Terminal Harness Snubber capacitor Inverter PCB Connection binder Power transistor (Metallic pillar) Procedure on tightening harness (snubber capacitor) and power transistor with screw.
  • Page 119 '14 • KX-SM-200 2.6 Heat source unit transistor module replacement procedure PCB012D008A 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 120 '14 • KX-SM-200 2.7 Heat source unit diode module replacement procedure PCB012D009A 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 121 '14 • KX-SM-200 '14 • KX-SM-200 ■ Function of Connection (1) Control PCB input (2) Control PCB output Mark Connector Function Mark Function Connector Tho-A CNTH Outdoor air thermistor 52X1 CNM1 Solenoid for CM1 Tho-R1 CNTH Heat exchanger thermistor 1 (Liquid) 20SM CNN1 4-way switching solenoid (Main)
  • Page 122 ３  phase 380-415V 50Hz...
  • Page 123 Heat source unit High／   Ambient   gas line thermistor Service （Tho-A） Capillary valve Capillary tube tube Indoor unit Strainer Strainer Heat exchanger 4way valve 4way valve e h t s i m r （ r o t ） t i （Main） （Heat exchanger） Heat exchanger （Thi-R3） （20SH） （20SM） thermistor 2  Heat exchanger （Gas）...
  • Page 124 5. APPLICATION DATA MITSUBISHI HEAVY INDUSTRIES, LTD.   WATER HEAT SOURCE MULTI AIR CONDITIONER 5.1 Installation of heat source unit Designed for R410A refrigerant KXZW SERIES INSTALLATION MANUAL PSC012D032 Heat source unit capacity FD C224 –1000 ◎This installation manual deals with heat source units and general installation specifications only. For indoor units, please refer to the respective installation manuals  ...
  • Page 125 '14 • KX-SM-200 CAUTION ● Do not control the system with main power switch. ● Do not operate the heat source unit with any article placed on it. It can cause fire or water leakage. In addition, the fan can start unexpectedly, which can cause personal injury. You may incur property damage or personal injure from a fall of the article.
  • Page 126 ● Do not perform any repairs or modifications by yourself. Consult the dealer if the unit requires repair. ● Do not shut off the power source immediately after stopping the operation. Wait at least 5 minutes, otherwise there is a risk of water leakage or breakdown. If you repair or modify the unit, it can cause water leaks, electric shocks or fire.
  • Page 127 The same heat source unit is used whether it is used alone or in combination with another unit. Please note that an installation involving a combination other than those listed below is not operable.   ● '14 • KX-SM-200 For your information: Installation example 1     ...
  • Page 128 '14 • KX-SM-200 4-2. Outline of water piping Heat source unit Shows the flow direction of water ⑤ ② ⑥ ① ③ ⑥ ② ① ④ ⑦ Structure of water piping (1) Key consideration for water piping Please consider following point when designing and installing. (Description of ①-⑦ in above figure) ①...
  • Page 129 '14 • KX-SM-200   510 m or less CAUTION Total pipe length    ●   130 m or less An installation not conforming to these restrictions can Main pipe length    ● induce a compressor failure, which shall be excluded from  ...
  • Page 130 (When an actual pipe length exceeds 90m, however, it is necessary to change the pipe size. Please determine the main pipe size by consulting with the Main Selection Reference Table set out in this Section (3) (c). '14 • KX-SM-200 (b) Selection of the connection pipe to branching pipes for three heat source units combination: Section E in Figure 1 Pipe size between branching pipes...
  • Page 131 When three heat source units combination, please connect using the tee joint (attached to the branching pipe set (DOS-3A-3)). '14 • KX-SM-200 (5) Selection of an indoor unit side branching pipe set Total capacity downstream Branching pipe set (a) Method of selecting a branching pipe set Less than 180 DIS-22-1G As an appropriate branching pipe size varies with the connected capacity (total capacity connected...
  • Page 132 '14 • KX-SM-200 When there is a danger that a small animal enters from the pipe port, cover the port with appropriate blocking materials (to be arranged on the user’s part). ● Use an elbow (locally procured) to connect control valves to the piping. ●...
  • Page 133 '14 • KX-SM-200 Do not apply any oil on a flare joint.   ● Use the accessory pipe to connect the refrigerant pipe to the gas valve of the heat source unit.   ● The gasket must be used between their flanges. Tightening torque for bolts is 25-30 N·m.
  • Page 134 '14 • KX-SM-200 5-3. Air tightness test and air purge (1) Air tightness test ① Although a heat source 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 operation valve on the heat source unit side.
  • Page 135 '14 • KX-SM-200 B: Additional refrigerant quantity for indoor units (kg) If the total indoor units capacity is larger than the heat source unit capacity, then calculate the additional refrigerant quantity for indoor units. Ｄ = (Total indoor units capacity) - (Heat source unit capacity) <Example>...
  • Page 136 '14 • KX-SM-200 6. ELECTRICAL WIRING WORK Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country. Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.   Please install an earth leakage breaker without fail.
  • Page 137 '14 • KX-SM-200 Always connect power cables to the power terminal block and fix power cables to the cramp with using the accessory band as right figure.  ● To connect a cable to the power terminal block, use round solderless terminals.  ●...
  • Page 138 Do not turn on power until installation work is completed. Turn off power to the unit before you service the unit.   ● Ensure that the unit is properly grounded.   ● '14 • KX-SM-200 ●  Signal cables are for DC 5 V. Never connect wires for 220/240 V or 380/415 V. Protective fuse on the PCB will trip. ①...
  • Page 139 Note: For FDT224 and 280 models, calculate the number of units taking 1 indoor unit as 2 units for the sake of communication. '14 • KX-SM-200 6-4. Procedure for interlock connection to the circulating water pump To ensure that the heat source unit operates only when the circulating water pump is running, be sure to connect the pump interlock circuit (auxiliary a-contact of the electromagnetic switch for the circulating water pump) to terminal block (TB1)
  • Page 140 '14 • KX-SM-200 ● Summary of address setting methods (figures in [ ] should be used with previous SL) Units supporting new SL Units NOT supporting new SL Indoor unit address setting Heat source unit address setting Indoor unit address setting Heat source unit address setting Indoor No.
  • Page 141 '14 • KX-SM-200 In the same way also on the master unit of combination, confirm that the rotary switch for heat source No. is set at 49 by the default. In the same way also on the slave unit of combination, confirm that the rotary switch for heat source No. is set at 49 by the default. When 2 units are combined, set the dip switch SW4-7 of slave unit to ON.
  • Page 142 ① Address setting of heat source unit Before turning on the power, set as follows. Confirm that the heat source No. switch is set at 49 by the default. '14 • KX-SM-200 ［STEP1］ ［STEP2］ Heat source unit Heat source unit Heat source unit Heat source unit Heat source unit...
  • Page 143 ⑦［AUX］(Blink） ⑧ “AUE”(blink), or “A○○” in error events. ⑪「End」 7-segment display '14 • KX-SM-200 Operating procedure When the eco touch remote control is connected, refer to the installation setting in the installation manual which is packed along with the remote control. (1) When single indoor unit is connected to the remote control.
  • Page 144 '14 • KX-SM-200 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 145 '14 • KX-SM-200 7-2. Control mode switching Controls of heat source unit may be selected as follows using the dip switches on the PCB and P○○ on the 7-segment. To change P○○ on the 7-segment, hold down SW8 (increasing a number shown on the 7-segment display panel: one’s place), SW9 (increasing a number shown on the 7-segment display panel: tens place) and SW7 (Data write/Enter).
  • Page 146 '14 • KX-SM-200 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 147 '14 • KX-SM-200 Error display on 7-segment indicator after ending the check operation Code indicator Data indicator Display contents Check following points Operation valve is closed. ・Isn’t the operation valve of heat source unit left open? (Refrigerant circuit is shut off ・Is the low pressure sensor normal? (Detected pressure can be seen on partially.) the 7-segment indicator.)
  • Page 148 '14 • KX-SM-200 5.2 Instructions for installing the branch pipe set PSB012D855D ◎ This manual describes the specifications of branching pipe set and header set installation. For heat source unit installation and indoor unit installation, please refer to the respective installation manuals supplied with your heat source unit and indoor unit.
  • Page 149 '14 • KX-SM-200 Branching pipe set type Gas side Liquid side Different diameter pipe joint 35  HEAD4-22-1G None IDφ12.7   IDφ9.52  375  415  135  HEAD6-180-1G IDφ 15.88    1 pc. 1 pc. 540  IDφ9.52   545  90  HEAD8-371-2 IDφ15.88   IDφ12.7    1 pc. 1 pc.
  • Page 150 '14 • KX-SM-200 ・In the case of a header set (model type HEAD) Gas side Horizontal Floor surface Floor surface Floor surface Horizontal Iiquid side Horizontal Floor surface Floor surface Floor surface When using the heat source unit’s branch pipe set, make sure to secure a straight section of 500 mm or more for both the gas and liquid pipes before branching them. ④...
  • Page 151 '14 • KX-SM-200 (5) Example of piping (a) Combination use FDC450KXZWE1 FDC500KXZWE1 FDC560KXZWE1 Combination ： FDC224KXZWE1＋FDC224KXZWE1 Combination ： FDC224KXZWE1＋FDC280KXZWE1 Combination ： FDC280KXZWE1＋FDC280KXZWE1 ［Branching pipe set:DOS-2A-3］ ［Branching pipe set:DOS-2A-3］ ［Branching pipe set:DOS-2A-3］ Reducer pipe  Reducer pipe  Reducer pipe  （Accessory） （Accessory） （Accessory） Main gas pipe Main gas pipe Main gas pipe...
  • Page 152 '14 • KX-SM-200 (b) Heat source unit connection Example 1 ： Branch system Selection of branching pipe set. （Than table 7 of PCB003Z847） Selecting piping size Connecting capacity ： 386 Piping size Selection procedure Branching pipe set Item Selection table Selection procedure Item Gas pipe Liquid pipe...
  • Page 153 Be sure to collect refrigerant without spreading it in the air. These contents are an example. Please refer to a similar part of actual unit. PROCEDURE & PICTURES (KXZW series) 2. To remove the lid of control box (1) Remove the service panel.
  • Page 154 '14 • KX-SM-200 PROCEDURE & PICTURES Terminal cover 9. To remove the high pressoure switch (63H) (1) Remove the lid of control box.(See No.2) (2) Disconnect the 63H connector(CNQ1) on PCB in control box. (3) Remove the top panel.(See No.3) (4) Remove welded part of high pressure 8.
  • Page 155 '14 • KX-SM-200 6. INDOOR UNIT DISASSEMBLY PROCEDURE DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 156 '14 • KX-SM-200 PROCEDURE & PICTURES Pipe lid To remove the heat exchanger assembly (1) Remove the drain pan.(See No.4) (2) Remove 2 pipe lid fixing screws and remove it.( mark) (3) Remove 3 heat exchanger assembly fixing screws and remove it.( mark) Coil of EEV 8.
  • Page 157 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 158 '14 • KX-SM-200 PROCEDURE & PICTURES Pipe lid To remove the heat exchanger assembly (1) Remove the drain pan.(See No.4) (2) Remove 2 plate fixing screws and remove it.( mark) (3) Remove 3 heat exchanger assembly fixing screws and remove it.( mark) Coil of EEV 8.
  • Page 159 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 160 '14 • KX-SM-200 PROCEDURE & PICTURES 6. To remove the drain pump(DM) and flot switch(FS) (1) Remove the drain pan.(See No.5) (2) Pull a hose to the arrow direction and remove it. (3) Remove 3 drain pump fixing screws and remove it.( mark) (4) Remove the flot switch fixing screw and remove it.( mark)
  • Page 161 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 162 '14 • KX-SM-200 PROCEDURE & PICTURES 8. To remove drain pump (DM) (1) Remove the lid of control box.(See No.1) (2) Remove the drain pan.(See No.4) (3) Disconnect the drain pump connector(CNRx) in the middle of wiring. (4) Pull a hose to the arrow direction and remove it. (5) Remove 2 drain pump assembly fixing screws and remove it.
  • Page 163 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 164 '14 • KX-SM-200 PROCEDURE & PICTURES 7. To remove drain pump (DM) (1) Remove the lid of control box.(See No.1) (2) Disconnect the drain pump connector(CNR) on PCB in control box. (3) Remove 4 drain pump assembly fixing screws and remove it.( mark) (4) Pull a hose to the arrow direction and remove it.
  • Page 165 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 166 '14 • KX-SM-200 PROCEDURE & PICTURES 7. To remove the drain pump(DM) and flot switch(FS) (1) Remove the lid of control box.(See No.1) (2) Remove 5 drain pump assembly fixing screws and remove it. mark) (3) Disconnect the drain pump connector(CNR) on PCB in control box. (4) Pull a hose to the arrow direction and remove it.
  • Page 167 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 168 '14 • KX-SM-200 PROCEDURE & PICTURES 6. To remove the control box (1) Remove the lid of control box.(See No.1) (2) Pull off all the inserted connectors. (3) Remove 2 cotrol box fixing screws and remove it. Pipe lid 7. To remove the heat exchanger assembly (1) Remove the bottom panel(B).(See No.3) (2) Remove the drain pan.(See No.5) (3) Remove the control box.(See No.6)
  • Page 169 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 170 '14 • KX-SM-200 PROCEDURE & PICTURES Pipe lid 7. To remove the heat exchanger assembly (1) Remove the drain pan.(See No.3) (2) Remove 3 pipe lid fixing screws and remove it.( mark) (3) Remove 4 heat exchanger assy fixing screws and remove it.( mark) 8.
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  • Page 175 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 176 '14 • KX-SM-200 PROCEDURE & PICTURES Bottom panel 6. To remove side panel and bottom panel (1) Remove air inlet grille.(See No.1) (2) Remove the right and left side panel fixing screws and remove it.( mark) (3) Remove 5 bottom panel fixing screws.( mark) Remove 6 bottom panel fixing screws and remove it.
  • Page 177 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 178 '14 • KX-SM-200 PROCEDURE & PICTURES 7. To remove the heat exchanger assembly (1) Remove the drain pan.(See No.4) (2) Remove 4 heat exchanger assy fixing screws and remove it.( mark) Cover 8. To remove the impeller and motor (FM) (1) Remove control box.(See No.1) (2) Disconnect the motor connector(CNM) on PCB in control box.
  • Page 179 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 180 '14 • KX-SM-200 PROCEDURE & PICTURES Top view Front view 6. To remove the heat exchanger assembly (1) Remove 9 top panel fixing screws and remove it .(Pic. (2) Remove 2 support fixing screws and remove it .(Pic. ) (3) Remove the lid of EEV box fixing screw and remove it.( mark, Pic.
  • Page 181 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 182 '14 • KX-SM-200 DISASSEMBLY PROCEDURE Precautions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram. The electrical components are under high voltage by the operation of the booster capacitor.
  • Page 183 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD. 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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