Mitsubishi Heavy Industries Hi-COP Series Service Manual

Vrf inverter multi-system air-conditioners

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SERVICE MANUAL

VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS

KXZ Outdoor units

Hi-COP series

Single use (Used also for combination)

FDC224KXZXE1, 280KXZXE1, 335KXZXE1

Combination use

FDC450KXZXE1, 500KXZXE1, 560KXZXE1, 615KXZXE1, 670KXZXE1, 735KXZXE1, 800KXZXE1,

850KXZXE1, 900KXZXE1, 950KXZXE1, 1000KXZXE1

Note:

(1) Regarding the Indoor unit series, refer to the No.'14 KX-DB-206.

Manual No. '14 KX-SM-204

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Page 1 Manual No. '14 KX-SM-204 SERVICE MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS KXZ Outdoor units Hi-COP series Single use (Used also for combination) FDC224KXZXE1, 280KXZXE1, 335KXZXE1 Combination use FDC450KXZXE1, 500KXZXE1, 560KXZXE1, 615KXZXE1, 670KXZXE1, 735KXZXE1, 800KXZXE1, 850KXZXE1, 900KXZXE1, 950KXZXE1, 1000KXZXE1 ...
Page 2 '14 • KX-SM-204 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-204 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 Remote control (Option parts) Wired remote control 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-204 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 '14 • KX-SM-204 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-204 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-204 • 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-204 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-204 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-204 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 supply reset. Power failure compensation function (Electric power supply failure) •...
Page 11 '14 • KX-SM-204 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-204 (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-204 Thermostat ON i) When the heat exchanger thermistor (ThI-R or R, whichever higher) detects °C or lower, the fan is turned OFF and does not operate. ii) When the heat exchanger thermistor (ThI-R or R, whichever higher) detects °C or higher, the fan operates with the fan control at heating thermostat OFF.
Page 14 '14 • KX-SM-204 (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-204 (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-204 Filter sign As the operation time (Total ON time of ON/OFF switch) accumulates to 0 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-204 (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 0 seconds after turning the drain pump OFF. Turning the drain detection switch “ON”...
Page 18 '14 • KX-SM-204 (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-204 (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 DCV signal for driving relay during operation ② Heating output: Outputs DCV signal for driving relay during heating operation ③...
Page 20 '14 • KX-SM-204 (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-204 (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-204 (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-204 (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 temp.
Page 24 '14 • KX-SM-204 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 Dehumidifying Functional Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Defrost Components Remote control Remote control Remote control Remote control...
Page 25 '14 • KX-SM-204 '14 • KX-SM-204 (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 26 '14 • KX-SM-204 '14 • KX-SM-204 Model 224 (Master) + 280 (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 Local load range Master unit...
Page 27 '14 • KX-SM-204 Model 280 (Master) + 224 (Slave 1) + 224 (Slave 2) 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 Local load range Master unit...
Page 28 '14 • KX-SM-204 8) 3 outdoor units combination use (Model 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 Local load range Master unit...
Page 29 '14 • KX-SM-204 (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 30 '14 • KX-SM-204 (4) Defrosting (Master unit/Slave unit) If the defrost starting conditions at the outdoor heat exchanger are established, defrost operation starts. (a) Temperature conditions for defrosting Conditions for starting defrost When all of following conditions are satisfied, defrost operation will be started. ) When the cumulative operation time Fig.1 J15 opened of the compressor becomes minutes Cold region...
Page 31 '14 • KX-SM-204 (5) 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 . MPa, the compressor stops. (b) Low pressure protective control/error If the low pressure drops below 0. MPa, the compressor speed is reduced gradually.
Page 32 '14 • KX-SM-204 (6) 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 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 33 '14 • KX-SM-204 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 supply at primary side Discharge pipe temperature error Outdoor heat exchanger and subcooling coil temperature thermistor anomaly...
Page 34 '14 • KX-SM-204 (7) 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 35 Code Contents of a display Communication protocol 0: Previous SL mode (The communication plotocol is displayed ; display only) 1: New SL mode '14 • KX-SM-204 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 36 '14 • KX-SM-202 '14 • KX-SM-204 The operation condition is displayed on the LCD of remote control and it is transferred to option centralized control. When the operation command from remote control is not accepted by this control, "Center" is displayed on the LCD of remote control.
Page 37 '14 • KX-SM-202 '14 • KX-SM-204 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 38 '14 • KX-SM-204 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 Normal Normal...
Page 39 '14 • KX-SM-204 (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 40 '14 • KX-SM-204 (3) Outdoor fan snow protection control (Master unit/Slave unit) (Note) Following explanation is based on setting function with -segment display [P0]. However the following terminals and -segment function settings are available to use. CnS: [P0]-[] CnS: [P0]-[] CnG: [P0]-[] CnG: [P0]-[] 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 41 '14 • KX-SM-204 P0 setting Mode 0 (Factory default) First unit’s operation mode Last unit’s operation mode Priority of master unit’s setting operation mode Priority of required major operation mode ・ First unit’s operation mode: O peration mode of the indoor unit which is operated first time after stop of the outdoor unit operation mode ・ Last unit’s operation mode: Operation mode of the indoor unit which is operated at the last time ・...
Page 42 '14 • KX-SM-204 ③ When it is changed from same mode to unmatch. Indoor unit 0 Stop Cooling Heating “Invalid operation” lamp flickers. Fan Indoor unit Stop Cooling Cooling ④ Operation mode is prepared for change in the fan mode. Indoor unit 0 Stop Indoor unit Stop Heating Heating <Last unit’s operation mode>...
Page 43 '14 • KX-SM-204 (d) Forced cooling /heating operation (Master unit) (Note) Following explanation is based on using CnG terminal and setting function [P0]-[] with -segment display. However other terminals can be used with following function setting of -segment display. CnS: [P0]-[] CnS: [P0]-[] CnG: [P0]-[] When SW- on the outdoor control PCB is turned ON after setting function [P0]-[] with -segment display, if...
Page 44 '14 • KX-SM-204 (6) 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 '14 • KX-SM-204 : Compressor ON output ·It is turned ON, when the compressor is ON : Fan ON output ·It is turned ON, when the outdoor fan No. speed command > 0, or the outdoor fan No. speed command > 0. : 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 '14 • KX-SM-204 (9) 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 '14 • KX-SM-204 ●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 '14 • KX-SM-204 (10) 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 49 '14 • KX-SM-204 (iii) Ending condition ① When the starting conditions are lost. (b) Compressor upper limit speed restriction for each operation capacity Starting condition (either of ① or ② ) ① When the external input assignment [P0] – [P0]: Multi-system energy save operation = Valid and -segment [P] (Multi-system energy save control II) = or or Factory default: 0 (OFF)/ (Setting ), (Setting ), (Setting ) ②...
Page 50 '14 • KX-SM-204 (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 outdoor unit control, registration information of indoor units and etc.
Page 51 '14 • KX-SM-204 (iii) Error code displayed at error occurrence can be reset with the dip switch SW- ON. (iv) Discharge pressure saturated temperature and suction pressure saturated temperature are displayed after rounding to unit, if it is -0.0°C or lower. (Because the -segment display range is -digit) (v) Priority of display ) [EXX] >...
Page 52 '14 • KX-SM-204 (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 0~130 CM2 operating frequency L,-20~43 1°C...
Page 53 '14 • KX-SM-204 Code Data display Minimum Contents of display Remarks range unit CNS1 Order of 100 : CNS1 CNS2 Order of 10 : CNS2 − CNG1 Order of 1 : CNG1 (0: Close, 1: Open) CNG2 Order of 100 : CNG1 Order of 10 : SV8 −...
Page 54 '14 • KX-SM-204 Code Data display Minimum Contents of display Remarks range unit FMo1 operating revolution command 0~999 10min FMo2 operating revolution command 10min 0~999 0~100 Only displaying Demand ratio 0~127 Outdoor operating mode pattern Control status 0~127 0~127 See table on P.54 Protection control status Compressor stop causes 0~127...
Page 55 '14 • KX-SM-204 Code Data display Minimum Contents of display Remarks range unit 0~80 Auto back up capable time Program sub-version 0~991 — Program POL version 0.00~9.99 0.01 — Auto send display — 0: (Factory default) Switching to operation priority 0, 1, 2, 3 0: (Factory default) 0 : Invalid...
Page 56 '14 • KX-SM-204 Code Data display Minimum Contents of display Remarks range unit Auto address setting on Indoor unit address No. assignment normal ending Indoor unit address No. assignment error 1 Indoor unit address No. assignment error 2 Indoor unit address No. assignment error 3 Superlink setting error [C67] Protection control status <Definition of signal>...
Page 57 '14 • KX-SM-204 [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 58 '14 • KX-SM-204 (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 RS232C connector on the outdoor control PCB and utilized for probing the cause.
Page 59 '14 • KX-SM-204 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 1 Hz Indoor unit 1 Answer frequency...
Page 60 '14 • KX-SM-204 Record data Code Write-in contents Data write-in Number of Write-in unit Contents range bytes Tho-H Sub cooling coil temp.2 -35~75 A/D value Suction pipe side Injection suction pipe temp.1 (spare) -40~75 A/D value Receiver liquid surface detection temp.1 (spare) -40~75 A/D value CT1 Current...
Page 61 '14 • KX-SM-204 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 0~255 Inverter CM2 operation frequency 0~255 FMo1 rotation command 0~2550...
Page 62 '14 • KX-SM-204 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 1 second 0~180 CM1 3-minute delay timer...
Page 63 '14 • KX-SM-204 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 64 '14 • KX-SM-204 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 — High pressure anomaly (63H1) counter Control status —...
Page 65 '14 • KX-SM-204 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 66 '14 • KX-SM-204 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) 40~50 1°C Heating setting 2 (Target of high temperature)
Page 67 '14 • KX-SM-202 '14 • KX-SM-204 (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 SW3-4 Refrigerant quantity check Normal★/Check SW3-5 Check operation start Normal★/Check...
Page 68 '14 • KX-SM-204 (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 69 '14 • KX-SM-204 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 70 '14 • KX-SM-204 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 supply 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 71 '14 • KX-SM-204 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 – Outdoor unit signal line error Address pairing setting error –...
Page 72 '14 • KX-SM-204 (b) 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 73 '14 • KX-SM-204 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 74 '14 • KX-SM-204 Green Error code Content Stays OFF Stays OFF Stays OFF None Indoor Earth leakage breaker activated Remote control: 7-segment display: – Stays OFF Stays OFF Stays OFF Outdoor 5.Troubleshooting 1.Applicable model All models Diagnosis Countermeasure Are the insulation resistance Replace compressor.
Page 75 '14 • KX-SM-204 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...
Page 76 '14 • KX-SM-204 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 77 '14 • KX-SM-204 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...
Page 78 '14 • KX-SM-204 Green Content Error code Keeps flashing Stays OFF Indoor None Louver motor anomaly 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 79 '14 • KX-SM-204 Green Power supply system anomaly Content Error code Stays OFF Stays OFF Indoor None Remote control: (Power supply to indoor unit PCB) 7-segment display: – Stays OFF 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC 220-240V/220V...
Page 80 '14 • KX-SM-204 Green Content Error code Power supply system error Stays OFF Keeps lighting Indoor None Remote control: (Power supply to remote control) 7-segment display: – Stays OFF Keeps lighting Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct it.
Page 81 '14 • KX-SM-204 Green Content Error code WAIT Indoor Keeps flashing Stays OFF Remote control: WAIT 7-segment display: – Outdoor 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 is kept on WAIT...
Page 82 '14 • KX-SM-204 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 83 '14 • KX-SM-204 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 84 '14 • KX-SM-204 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 85 '14 • KX-SM-204 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 86 '14 • KX-SM-204 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 87 '14 • KX-SM-204 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 88 '14 • KX-SM-204 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 89 '14 • KX-SM-204 Green Content Error code Keeps flashing Keeps flashing 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 90 '14 • KX-SM-204 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 91 '14 • KX-SM-204 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 92 '14 • KX-SM-204 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 93 '14 • KX-SM-204 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 94 '14 • KX-SM-204 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.
Page 95 '14 • KX-SM-204 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...
Page 96 '14 • KX-SM-204 Green Green Content Error code 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 Indoor master and slave indoor units Keeps ﬂashing Keeps ﬂashing –...
Page 97 '14 • KX-SM-204 Green Content Error code Address setting error Keeps flashing Keeps flashing 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 98 '14 • KX-SM-204 Indoor fan motor anomaly Green Content Error code (FDT, FDTC, FDTW, FDTS, FDU, Keeps flashing 1-time flash Indoor Remote control: – 7-segment display: FDUM, FDK, FDUT71, FDFW series) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTS, Diagnosis Countermeasure...
Page 99 '14 • KX-SM-204 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 100 '14 • KX-SM-204 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...
Page 101 '14 • KX-SM-204 Indoor fan motor Green Content Error code rotation speed anomaly Keeps flashing 1-time flash Indoor Remote control: – (In case of FDT, FDTC, FDTW, FDTS, FDU, FDUM, FDK, FDUT71, FDFW series) 7-segment display: Keeps flashing Stays OFF Outdoor 5.
Page 102 '14 • KX-SM-204 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 103 '14 • KX-SM-204 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 104 '14 • KX-SM-204 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.
Page 105 '14 • KX-SM-204 Green Content Error code Open L3 Phase on Keeps flashing Stays OFF Indoor Remote control: power supply 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 106 '14 • KX-SM-204 Green Discharge pipe temperature Content Error code Keeps flashing Stays OFF Indoor Remote control: error (Tho-D1) E36-1 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 107 '14 • KX-SM-204 Outdoor heat exchanger Green Content Error code temperature thermistor (Tho-R) and subcooling coil Keeps flashing Stays OFF Indoor Remote control: temperature thermistor (Tho-SC,-H) anomaly E37-1, 2, 3, 4, 5, 6*1 7-segment display: Keeps flashing Outdoor *1 E37-1: 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) 5.
Page 108 '14 • KX-SM-204 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.
Page 109 '14 • KX-SM-204 Green Content Error code Discharge pipe temperature Keeps flashing Stays OFF Indoor Remote control: thermistor anomaly (Tho-D1) E39-1 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 '14 • KX-SM-204 Green High pressure anomaly Content Error code Keeps flashing Stays OFF Indoor Remote control: (63H1-1 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.
Page 111 '14 • KX-SM-204 Green Content Error code Keeps flashing Stays OFF Indoor E41(E51) Remote control: Power transistor overheat E41(E51)-1*1 7-segment display: Keeps flashing 1-time flash Outdoor *1 E41-1 (E51-1) : CM1 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check, record operating condition.
Page 112 '14 • KX-SM-204 Green Content Error code Keeps flashing Stays OFF Indoor Remote control: Current cut (CM1) E42-1 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Save data for 30 minutes before stopping in Mente PC. Check, record operating condition.
Page 113 '14 • KX-SM-204 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.
Page 114 '14 • KX-SM-204 Green Content Error code Liquid flooding anomaly Keeps flashing Stays OFF Indoor Remote control: (CM1) E44-1 7-segment display: Keeps flashing 1-time flash Outdoor 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.
Page 115 '14 • KX-SM-204 Green Content Error code Communication error between Keeps flashing Stays OFF Indoor Remote control: inverter PCB and outdoor control PCB E45-1 7-segment display: Keeps flashing 1-time flash Outdoor *1 E45-1: INV1 5. Troubleshooting 1. Applicable model (Inspect also the INV1 even if it is E45-2.) Outdoor unit Diagnosis Countermeasure...
Page 116 '14 • KX-SM-204 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 117 '14 • KX-SM-204 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) Inspect also the fan motor 2 even if it is E48-1. 5.
Page 118 '14 • KX-SM-204 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) Inspect also the fan motor 2 even if it is E48-1. 5.
Page 119 '14 • KX-SM-204 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.
Page 120 '14 • KX-SM-204 Green Content Error code Suction pipe temperature thermistor anomaly (Tho-S), Keeps flashing Stays OFF Indoor E53/E55*1 Remote control: E53/E55-1 Under-dome temperature thermistor anomaly (Tho-C1) 7-segment display: Keeps flashing 1-time flash Outdoor *1 E55-1 : Tho-C1 5. Troubleshooting 1.
Page 121 '14 • KX-SM-204 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.
Page 122 '14 • KX-SM-204 Green Content Error code Power transistor temperature Keeps flashing Stays OFF Indoor Remote control: thermistor anomaly (Tho-P1) E56-1 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 123 '14 • KX-SM-204 Green Content Error code Anomalous compressor Keeps flashing Stays OFF Indoor Remote control: by loss of synchronism E58-1 *1 7-segment display: Keeps flashing 1-time flash Outdoor *1 E58-1: CM1 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check, record operating condition.
Page 124 '14 • KX-SM-204 Green Compressor startup Content Error code Keeps flashing Stays OFF Indoor Remote control: failure (CM1) E59-1 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.
Page 125 '14 • KX-SM-204 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.
Page 126 '14 • KX-SM-204 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.
Page 127 '14 • KX-SM-204 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 128 '14 • KX-SM-204 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 129 '14 • KX-SM-204 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 130 '14 • KX-SM-204 (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 131 '14 • KX-SM-204 2.6 Outdoor unit transistor module replacement procedure PCB012D043 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 132 '14 • KX-SM-204  Function of Dip switch for control (SW3, 4, 5) • SW3 (Function setting) • SW5 (Function setting) ON/OFF Function Switch Function Test run switch test run Inspection LED reset SW5-1 SW3-1 Test run switch Normal OFF Normal Test run operation mode Cooling SW5-2 Backup operation...
Page 133 '14 • KX-SM-204  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) CNN1 4-way valve Tho-R2 CNB2 Heat exchanger thermistor 2 (Exit, Rear)
Page 134 FMC1 52X1-1 63H1-1 52X1-2 SV11 YE／GN L2i L3i Ni CNW RD CNR1 WH CNM1 GY CNN1 RD CNN2 GN CNN9 BK CNN6 PK CNQ1 WH CNN8 PK Noise ﬁlter CNL2 WH PWB3-1 L1o L2o L3o No Circuit breaker CNL1 BL Earth leakage Reserve breaker CNZ1 RD output （Impulse withstanding type） Operation CNH BL output Power source Trouble CNY WH 3 Phase output...
Page 135 FMC1 52X1-1 63H1-1 52X1-2 20UF YE／GN L1i L2i L3i Ni L2i L3i Ni CNW RD CNR1 WH CNM1 GY CNN1 RD CNN2 GN CNN6 PK CNN7 GN CNQ1 WH CNN8 PK Noise ﬁlter Noise ﬁlter CNL2 WH PWB3-1 PWB3-2 L1o L2o L3o No L1o L2o L3o No Circuit breaker CNL1 BL Earth leakage Reserve breaker CNZ1 RD output...
Page 136 Outdoor unit Service valve Thermistor Gas line （Tho-A） t s i （ r o i x E ） t 4way valve （Thi-R3） t s i （ r o ） Solenoid （Thi-R1） Check joint valve Check joint （） Heat High pressure Strainer s n e （ r o ）...
Page 137 Outdoor unit Service valve Thermistor Gas line （Tho-A） t s i （ r o i x E ） t 4way valve （Thi-R3） t s i （ r o ）（Thi-R1） Check joint Check joint High pressure Heat s n e （ r o ） H exchanger Low pressure s n e （...
Page 138 '14 • KX-SM-204 5. APPLICATION DATA MITSUBISHI HEAVY INDUSTRIES, LTD. MULTI AIR CONDITIONER OUTDOOR UNIT FOR BUILDINGS 5.1 Installation of outdoor unit ● Designed for R410A refrigerant KXZ Hi-COP SERIES INSTALLATION MANUAL ● PSC012D031B Outdoor unit capacity ● F DC224 – 1000KXZXE1 ● ◎This installation manual deals with outdoor units and general installation speciﬁcations only. For indoor units, please refer to the respective installation manuals ...
Page 139 '14 • KX-SM-204 Notabilia as a unit designed for R410A Dedicated R410A tools Gauge manifold Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional ● refrigerant. Charge hose A cylinder containing R410A has a pink indication mark on the top.
Page 140 You may incur property damage or personal injure from a fall of the article. Do not perform any repairs or modiﬁcations by yourself. Consult the dealer if the unit requires repair. Do not step onto the outdoor unit. ● ● You may incur injury from a drop or fall.
Page 141 '14 • KX-SM-204 1350 Unit Base Normally, it is desirable that a A base used for a former model Please use it for renewal installation. base as speciﬁed in the drawing is wrongly oriented and not (Please add a base on the center) Anchor bolt positions above is provided.
Page 142 '14 • KX-SM-204 (3) Pipe size selection (a) Outdoor unit – Outdoor unit side branching pipe: Section A in Figure 1 Please use a pipe conforming to the pipe size speciﬁed for outdoor unit connection. Indoor unit connecting pipe size table Outdoor unit outlet pipe speciﬁcations Outdoor unit Gas pipe...
Page 143 '14 • KX-SM-204 (e) Selection of pipe between outdoor branch pipes for 3-unit combination: Section E in Figure 1 Size of pipe between outdoor branch pipes varies depending on the capacity of outdoor unit which is connected to second branch pipe in the outdoors. Select it from the following table.
Page 144 '14 • KX-SM-204 4-2. Pipe connection position and pipe direction (1) Pipe connecting position and pipe outgoing direction Although this drawing illustrates an installation involving a 224 unit an installation involving a 280 or 335 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 145 '14 • KX-SM-204 (2) Piping work CAUTION Important If you tighten it without using double spanners, you may deform the operation valve, which can cause an inﬂow of nitrogen gas Please take care so that installed pipes may not touch components within a unit. ...
Page 146 '14 • KX-SM-204 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 operation valve on the outdoor unit side.
Page 147 '14 • KX-SM-204 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) If operated for a long time with insufﬁcient refrigerant the compressor will be damaged.
Page 148 '14 • KX-SM-204 Wires for connecting indoor Band (accessory) Exterior tape Pipe cover (accessory) and outdoor units Gas piping Liquid piping insulation 5. Drainage Where water drained from the outdoor unit may freeze, connect the drain pipe using option drain elbow and drain grommet. ●...
Page 149 (23℃ or a higher dew point temperature). In such a case, apply an additional heat insulation material of 10 to 20 mm thick to dress an indoor unit body, piping and drain pipes. When the ambient dew point temperature becomes 28℃ or higher, or the relative humidity becomes 80% or higher, add further 10 to 20 mm thick heat insulation material. '14 •...
Page 150 '14 • KX-SM-204 6-3. Method of connecting signaling wires The communication protocol can be choosen from following two types. One of them is the conventional Superlink (hereinafter previous SL) and the other is the new SuperlinkⅡ (hereinafter new SL) . These two communication protocols have the following advantages and restrictions, so please choose a desirable one meeting your installation conditions such as connected indoor units and centralized controller.
Page 151 '14 • KX-SM-204 (2) When the remote control wire runs parallel to another power source wire or when it is subject to outside noise, such as from a high-frequency device, use shielded wire. (Be sure to ground only one end of the shielded wire.) kⅡ...
Page 152 '14 • KX-SM-204 ● 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 Outdoor unit address setting Indoor unit address setting Outdoor unit address setting Indoor No.
Page 153 groove and turn the arrow to SW5-2 Indoor No. switch (The hundred’s Place) [OFF : 0, ON : 1] point a desired number. Outdoor PCB SW1, 2 (green) For setting outdoor No. (The ten’s and one’s) For ten’s place For one’s place '14 •...
Page 154 '14 • KX-SM-204 ［STEP1］［STEP2］ Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] (Master) [01] (Slave) [01 (02)] (Master) [03] (Slave) [(03)(04)] SW4-7 0FF SW4-7 ON SW4-7 0FF SW4-7 ON...
Page 155 '14 • KX-SM-204 (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 Press the AIR CON Unit No. switch for 3 seconds or longer. [CHANGE ADD▼] Address change mode ②...
Page 156 unit No. are defined. →Returns to normal condition. '14 • KX-SM-204 Address setting failure indication Code Contents of a display Please check Are signal lines connected properly without any loose connections? The number of the indoor units that can be actually communicated with is less Input the number of connected indoor units again.
Page 157 Polarity is defined. (Automatic address) Completed normally. '14 • KX-SM-204 By changing the allocation of external input function (P07-10) on the 7-segment, functions of external input terminal External output function of CnZ1 can be changed may be selected. Inputting signals to external input terminals enable the following functions. by changing P06 on 7-segment indicator.
Page 158 '14 • KX-SM-204 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 159 '14 • KX-SM-204 Error display on 7-segment indicator after ending the check operation Code indicato Data indicator Display contents Check following points ・Isn’t the operation 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 160 '14 • KX-SM-204 (3) Method of refrigerant quantity check operation (a) Starting the refrigerant quantity check operation ・ Conﬁrm that all of the following switches are turned OFF; SW3-2 (Auto backup operation), SW3-6 (Pipe wash mode), SW3-7 (Forced cooling/heating mode), SW5-1 (Test run), SW5-2 (Test run cooling setting), SW5-3 (Pump-down operation) and SW5-6, 7, 8 (Capacity measurement mode).
Page 161 '14 • KX-SM-204 8-4. Test operation (1) Test run from an outdoor unit. Whether external inputs are set to ON or OFF, you can start a test run by using the SW5-1 and SW5-2 switches provided on the outdoor unit board. Select the test run mode ﬁrst.
Page 162 '14 • KX-SM-204 5.2 Instructions for installing the branch pipe set PSB012D855D ◎ This manual describes the speciﬁcations of branching pipe set and header 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 163 '14 • KX-SM-204 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 164 '14 • KX-SM-204 ・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 ④ When using the outdoor 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. Outdoor unit 1 Outdoor unit 2 Outdoor unit 3 Outdoor unit’s branch pipe 1 Outdoor unit’s branch pipe 2...
Page 165 '14 • KX-SM-204 Total capacity downstream Header set model type Number of branches less than 180 HEAD4-22-1G Up to 4 branches 180 or higher – less than 371 HEAD6-180-1G Up to 6 branches 371 or higher – less than 540 HEAD8-371-2 Up to 8 branches 540 or more...
Page 166 '14 • KX-SM-204 '14 • KX-SM-202 5.3 Procedure to attach or remove the front panel (1) Purpose • Easier to find the holes to fit the screws • Improves serviceability (2) Point of change • Holes of the pancle are bigger （φ 7 （ KX6 ） → φ 8 （ KXZ ）） •...
Page 167 VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS Air-Conditioning & Refrigeration Division 16-5, Konan 2-chome, Minato-ku, Tokyo, 108-8215 Japan http://www.mhi.co.jp Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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