Mitsubishi Heavy Industries KXZ Series Service Manual

Vrf inverter multi-system air-conditioners, outdoor unit, heat pump type

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Manual No.'18 • KX-SM-292

Manual No. '18

KX-DB-291

•

SERVICE MANUAL

DATA BOOK

VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS

(OUTDOOR UNIT)

KXZ series (Heat pump type)

FDC224KXZME1, 280KXZME1, 335KXZME1

Note:

•

(1) Regarding the indoor unit series, refer to the No.'17

KX-T-266 and '18

KX-T-281.

•

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Summary of Contents for Mitsubishi Heavy Industries KXZ Series

Page 1 Manual No. '18 KX-DB-291 • SERVICE MANUAL DATA BOOK VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (OUTDOOR UNIT) KXZ series (Heat pump type) FDC224KXZME1, 280KXZME1, 335KXZME1 Note: • (1) Regarding the indoor unit series, refer to the No.'17 KX-T-266 and '18 KX-T-281. •...
Page 2 '18 • KX-SM-292 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ..... 2 1.1 Remote control (Option parts) ..............2 1.2 Operation control function by the wired remote control ......5 1.3 Operation control function by the indoor control ........10 1.4 Operation control function by the outdoor control ........
Page 3 '16 • PAC-T-251 '18 • KX-SM-292 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 1.1 Remote control (Option parts) Wired remote control (1) Wired remote control Model RC-EX3A (a) Model RC-EX3A ⑤...
Page 4 '16 • PAC-T-251 '18 • KX-SM-292 (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 '16 • PAC-T-251 '18 • KX-SM-292 (2) Wireless remote control Wireless remote control Model RCN-E2 Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature. SLEEP TIMER time display Indicates the amount of time remaining on the sleep timer. ②...
Page 6 '18 • KX-SM-292 1.2 Operation control function by the wired remote control 1.10.2 Operation control function by the wired remote control (1) Model RC-EX3A (a) Switching sequence of the operation mode switches of remote control (i) Tap the change operation mode button on the TOP screen. (ii) When the change operation mode screen is displayed, tap the button of desired mode.
Page 7 '18 • KX-SM-292 ●Content memorized with the power failure compensation are as follows. Note(1) Items f) and g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not. At power failure –...
Page 8 '18 • KX-SM-292 (2) Model RC-E5 (a) Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (b) CPU reset This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that of the power source reset.
Page 9 '18 • KX-SM-292 (3) Operation and setting from wired remote control A : Refer to the instruction manual for RC-EX series ○：Nearly same function setting and operations are possible. B : Refer to the installation manual for RC-EX series △：Similar function setting and operations are possible. C : Loading a utility software via Internet Setting ＆...
Page 10 '18 • KX-SM-292 Setting ＆ display item Description RC-EX3A RC-E5 2 Administrator settings R/C display setting Register [Room name] [Name of I/U] Display [Indoor temp. display] or not. △ [Administrator password] Display [Error code display] or not. Display [Heating stand-by display] [Defrost operation display] [Auto cooling/heating display] [Display temp. of R/C, Room, Outdoor] or not The administrator password can be changed.
Page 11 '18 • KX-SM-292 1.3 Operation control function by the indoor control (1) Operations of functional items during cooling/heating Cooling Heating Operation Dehumidifying Thermostat Thermostat Thermostat Thermostat Hot start (Defrost) Functional item Compressor 4-way valve Outdoor unit fan Indoor unit fan Thermostat ON: Drain pump Thermostat OFF:...
Page 12 '18 • KX-SM-292 (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 Set OFF timer by hour Set ON timer by hour Set OFF timer by clock...
Page 13 '18 • KX-SM-292 b) Thermostat ON i) When the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 25°C or lower, the fan is turned OFF and does not operate. ii) When the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 25°C or higher, the fan operates with the fan control at heating thermostat OFF.
Page 14 '18 • KX-SM-292 (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 3 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 '18 • KX-SM-292 (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 '18 • KX-SM-292 (8) Filter sign As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours , “FILTER CLEANING” is displayed on the remote control. (This is displayed when the unit is in trouble and under the central control, regardless of ON/OFF) Notes (1) Time setting for the filter sign can be made as shown below using the indoor function of wired remote control “Filter sign”.
Page 17 '18 • KX-SM-292 (11) Drain pump abnormalities detection (Except FDK) 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.
Page 18 further by 20min Note (1) Indoor fan speed can be increased by up to 2 taps. • Compressor frequency drop start temperature Symbol '18 • KX-SM-292 Item Temperature - Low (Factory default) Temperature - High (b) Selection of indoor fan speed Note (1) Frost prevention temperature setting can be selected with the indoor unit function setting of the wired remote control.
Page 19 '18 • KX-SM-292 '16 • PAC-T-251 '16 • PAC-T-251 (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (a) Broken wire detection (a) Broken wire detection If the return air temperature sensor detects broken wire for 5 seconds continuously, the compressor stops (E7). If the heat If the return air temperature sensor detects broken wire for 5 seconds continuously, the compressor stops (E7).
Page 20 '18 • KX-SM-292 (b) Input for external control The external input for the indoor unit can be selected from the following input by the wired remote control. The input connectors (CnT-6 and CnTA) are equipped on the indoor unit control PCB. “LEVEL INPUT(Factory default)”...
Page 21 available*(1) *(1) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Level input (Factory default)”; '18 • KX-SM-292 ① When card key switch is ON (CnT-6 or CnTA ON: Operation permission), start/stop operation of the unit from the wired remote control becomes available.
Page 22 Actual operation Stop Stop Stop Stop '18 • KX-SM-292 Remote control Remote Remote Remote control OFF control ON control ON Note (1) If it is prohibited by CnT, all “Operation” and “Stop” commands are not accepted. In case of CnT ② operation/stop pulse + CnTA ③ operation permission/prohibition level CnTA Operation permission/ prohibition level...
Page 23 '18 • KX-SM-292 (c) 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 External input Operation selection method External input (CnT or CnTA) Cooling zone Heating zone...
Page 24 '18 • KX-SM-292 (25) High power operation (RC-EX3A only) It operates at with the setting temperature fixed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15 minutes maximum. (26) Energy-saving operation (RC-EX3A only) It operates with the setting temperature fixed at 28°C for cooling, 22°C for heating or 25°C for auto. When fan control in cooling/ heating thermo-OFF setting is “Set fan speed”, fan speed during thermo-OFF is changed to “Low”.
Page 25 In order to reach the room temperature to the set temperature as quickly as possible, the air flow rate is increased when the set temperature of thermostat differs largely from the return air temperature. According to temperature difference between set temperature and return air temperature, indoor fan tap are controlled automalically.
Page 26 '18 • KX-SM-292 1.4 Operation control function by the outdoor control (A) Normal control (1) Operation of major functional components under each operation mode Heating Cooling/Dehumidifying Operation mode Thermostat Thermostat Thermostat Thermostat Defrost Functional item 〇 × × 〇 × 〇...
Page 27 '18 • KX-SM-292 (2) Compressor pre-start control (a) Remote control full stop → Operation (i) Starting conditions • When it has changed to the compressor operation frequency command > 0 Hz from the state of compressor stopping. (ii) Control contents •...
Page 28 '18 • KX-SM-292 (b) Cooling → Heating (i) Starting conditions • When the outdoor unit operation mode is changed from the cooling operation to heating operation (ii) Control contents 1) When the compressor is operating, it makes the compressor stopped. 2) Each functional component operates according to the sequence shown below.
Page 29 '18 • KX-SM-292 (c)　Heating → Cooling (i) 　 Starting conditions • When the outdoor unit operation mode is changed from the heating operation to cooling operation (ii) 　 Control contents When the compressor is operating, it makes the compressor stopped. Each functional component operates according to the sequence shown below.
Page 30 '18 • KX-SM-292 (3) Compressor control (a) 4-way valve switching safeguard In order to switch 4-way valve completely, it makes the compressor speed increasing as follows. (i) This control starts to increase the compressor speed from 10 rps after the compressor pre-start control ends. (ii) The target compressor speed is shown in following table.
Page 31 '18 • KX-SM-292 < Ending conditions > When either one of following conditions is established a) When the frequency upper limit increase by this control continued for 15 minutes in total When the inverter has stopped within 15 minutes after the start and is started again, it starts with the normal protection start and increases the frequency upper limit at a rate of 5 rps/minute till the frequency increase continues for 15 minutes in total.
Page 32 '18 • KX-SM-292 (4) Outdoor fan control (a) Outdoor fan speed and fan motor rotation speed. The 7th outdoor fan speed in the following table is specified as the rated speed. Under the normal control, the speeds up to 8th level (800 min ) are used.
Page 33 '18 • KX-SM-292 (c)　Outdoor fan cooling control at low outdoor air temperature (i) 　 Starting conditions This control is performed when all of following conditions is established. Œ When the ordinary outdoor fan control is performed Outdoor air temperature ≦ 10ºC (It is reset with the hysteresis of the outdoor air temperature > 15ºC.) Valid Invalid Outdoor air temperature...
Page 34 '18 • KX-SM-292 (5) Defrost control (a) Temperature condition of defrost operation (Standard speciﬁcation or cold region speciﬁcation can be selected by switching the (i) Starting conditions jumper wire J15.) Defrost operation will start, when outdoor unit whose compressor is operating under heating mode has satisfied all the following conditions.
Page 35 '18 • KX-SM-292 (6) Protective control (a) Discharge pipe temperature (Td) control Discharge pipe temperature sensor (Tho-D1) monitors the discharge pipe temperature (Td) to avoid the rise of discharge pipe temperature. (i) Compressor capacity control 1) Starting conditions When all of following conditions are satisfied Œ...
Page 36 '18 • KX-SM-292 (B) Option controls • Functions of outdoor PCB connector CnS1 , CnS2, CnG1, CnG2 and CnZ1 ① CnS1 connector : By changing the allocation of external input functions [P07- “ X ” ] on the 7-segment, following functions can be selected.
Page 37 '18 • KX-SM-292 (1) External input and demand input (a) Operation permission or prohibition modes Note (1) With 7-segment display [P07]-[0] (CnS2:[P08]-[0], CnG1:[P09]-[0] and CnG2[P10]-[0] can be used as well.) (i) Operation permission or operation prohibition mode is switched with the connector (CnS1) and the jumper wire (J13) on the outdoor PCB.
Page 38 '18 • KX-SM-292 (ii) Operation/ stop control by the demand input CnS2 of outdoor unit CnS2: Switching of demand control/ Input: CnS2 Switching with J13 normal operation Short-circuit Demand control Short-circuit (Level input)  Normal operation Switching of normal operation/ Open (Pulse input) Open demand control (Reversal)
Page 39 '18 • KX-SM-292 (c) 2-step demand control (i) Starting condition If all the following conditions are satisfied. 1) 7-segment display [P04] is set 0%, 40%, 60% or 80% (except OFF). 2) Demand control is in operation. 3) External input connector of outdoor unit for "2-step demand control" is valid. Ex.
Page 40 '18 • KX-SM-292 (2) Silent mode control (a) Starting conditions When all of the following conditions is established (i) At the start of silent mode initiated by the indoor unit or when the silent mode input is made effective (short-circuited) at the external input terminal (Factory default: CnG2) on the outdoor unit (ii) When the outdoor unit operation mode is cooling or heating (iii) When the outdoor air temperature satisfies the following condition...
Page 41 '18 • KX-SM-292 Outdoor fan snow protection control (a) This control is enabled/disabled by entering data into 7-segment display. (b) Setting method of outdoor fan control [Starting conditions] When following conditions are established for 10 minutes continuously. Snow protection control setting is valid ([P02]-1) and outdoor air temperature < 3°C or external input of outdoor fan snow protection control ON.
Page 42 '18 • KX-SM-292 (5) Energy saving mode control This control is effective, when [P04] of 7-segment display is set 000, 040, 060, 080 (except OFF) (a) Control contents Compressor upper limit speed is changed according to the setting ratio. (ii) Compressor upper limit speed is obtained by multiplying the rating speed (at cooling/heating) with the setting ratio as follows.
Page 43 '18 • KX-SM-292 Pump down operation control for removal of the unit When an outdoor unit is discarded or removed, the pump down control is performed at the outdoor unit side in order to recover the refrigerant quickly to the outdoor unit. (a) Starting conditions This is implemented with the liquid service valve closed.
Page 44 '18 • KX-SM-292 (9) Outdoor operation mode On the standard models of 2 pipe system, the outdoor operation mode of Stop/Cooling/Heating is selected based on the information of indoor units, and then respective controls are performed. <Contents of control> (a) Determination of outdoor operation mode Operation mode of outdoor unit is determined based on respective signals of Operation/Stop and Cooling/Heating.
Page 45 '18 • KX-SM-292 ③ When it is changed from same mode to unmatch. Indoor unit 0 Stop Cooling Heating “Invalid operation” lamp flickers. Indoor unit 1 Stop Cooling Cooling ④ Operation mode is prepared for change in the fan mode. Indoor unit 0 Stop Indoor unit 1...
Page 46 '18 • KX-SM-292 (iii) With the forced mode from indoor unit, if a different operation mode is commanded, following operations take place based on the forced cooling/heating operation set with the 7-segment [P38]. P38 = 0: The operation mode unmatch is displayed on the remote control, etc., and it is changed to the fan operation.
Page 47 '18 • KX-SM-292 ● Pump down by external input Activate by 7-segment:[P77]=“1” Emergency call => External operation input : Shorted Alarm unit Gas leakage Pump down <== operation (11) 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.
Page 48 '18 • KX-SM-292 (b) Compressor upper limit speed restriction for each operation capacity (i) Starting condition (either of ① or ② ) ① When the external input assignment [P07] – [P10]: Multi-system energy save operation = Valid and 7-segment [P67] (Multi-system energy save control II) = 1 or 2 or 3 Factory default: 0 (OFF)/1 (Setting 1), 2 (Setting 2), 3 (Setting 3) ②...
Page 49 '18 • KX-SM-292 (C) Data output 7-segment and operation data retention (a) 7-segment display Operation information is displayed for checking various operation data during test run and for helping malfunction diagnosis at servicing. Input data to microcomputer, contents of outdoor unit control, indoor unit registration information, or other, are mainly displayed on the 7-segment LED.
Page 50 '18 • KX-SM-292 (iv) Precedence of display [EXX] > [Related to check operation ([CHJ] > [CHU])] > [PdE] > [PdS]> [oPX] > [CXX] Œ If resetting from the display of Œ , it is switched to [C00]. If SW8 or SW9 is pressed during the display of Œ , it changes to [C00]. Ž...
Page 51 '18 • KX-SM-292 (b) List of 7-segment displays Code Contents of display Data display range Minimum unit Remarks Error [EXX] display Caution [oPX] display Special [PdS][PdE] display Code Contents of data display Data display range Minimum unit Remarks <Sensor value, actuator information> CM1 operation frequency 0 - 130 (Spare)
Page 52 '18 • KX-SM-292 Code Minimum Contents of data display Data display range Remarks unit Order of 100: CnG2 C32 External input – Order of 10: (Spare) (0: Close, 1: Open) Order of 1: (Spare) Order of 100: 52C-1 C33 Relay output –...
Page 53 '18 • KX-SM-292 Code Minimum Contents of data display Data display range Remarks unit <Anomalous counter information> C70 Counter · Sensor wire disconnected 0 - 3 C71 Counter · High pressure protection 0 - 5 Counter · Anomalous low pressure Ž (During 0 - 5 operation) C73 Counter ·...
Page 54 '18 • KX-SM-292 Code Minimum Contents of data display Data display range Remarks unit <User setting> P00 (Spare) – – – – – 0: First push preference (Factory default) 0 : (Factory default) 1: Last push preference P01 Operation preference switching –...
Page 55 '18 • KX-SM-292 Code Min. Data display contents Data display range Remarks unit <Service engineer setting> – – – – – – – P16 (Spare) – – – – – – – P17 (Spare) – – – – – – – P18 (Spare) 0: Control for ensuring certain indoor outlet air temperature Preferencial switch to ensure...
Page 56 '18 • KX-SM-292 (c) Saving of operation data Mainly for investigating the causes of market claims, operation data are always saved in memory. If any trouble occurs, the data writing is stopped and only the operation data prior to the time when the trouble occurs are recorded. These data can be loaded to a PC via RS-232C connector of PCB and utilized for identifying causes.
Page 57 '18 • KX-SM-292 Code Record data Number of Write contents Unit of write Contents Data write range bytes 00: No error on outdoor unit Error code 00 - 99 – 01-99: All errors 00 – 3F: Outdoor Error existing unit address 00 - FF –...
Page 58 '18 • KX-SM-292 Code Record data Unit of Number of Write contents Contents Data write range write bytes FMo1 Fan speed command 0 - 65535 10min FMo2 Fan speed command 0 - 65535 10min EEVH1 opening degree 0 - 65535 1 pulse EEVSC opening degree 0 - 65535...
Page 59 '18 • KX-SM-292 Code Record data Unit of Number of Write contents Contents Data write range write bytes DIP switch [SW6] – – Bit0 SW6-1 0 : OFF, 1 : ON Bit1 SW6-2 0 : OFF, 1 : ON Bit2 SW6-3 0 : OFF, 1 : ON Bit3...
Page 60 '18 • KX-SM-292 Code Record data Unit of Number of Write contents Contents Data write range write bytes <Error counter information> Control status HP (63H1) anomaly counter 0 - 5 Control status LP anomaly counter while 0 - 5 running Control status LP anomaly counter while 0 - 5 stopping...
Page 61 '18 • KX-SM-292 Code Record data Unit of Number Write contents Contents Data write range write of bytes Heating setting 2 (Target high 0.05 3.15 - 2.75 pressure) [ MPa ] Heating setting 3 (Judgment 30 - 38 1 [ °C ] temperature) <Other>...
Page 62 '18 • KX-SM-292 (2) Outdoor PCB setting Code Input Remarks Outdoor address No. (Order of 10) Outdoor address No. (Order of 1) Normal ★ /Reseet SW3-1 Inspection LED reset None ★ /With SW3-2 Automatic backup operation Normal ★ /Forced heating-cooling SW3-7 Forced heating/cooling Normal ★...
Page 63 '18 • KX-SM-292 2. SYSTEM TROUBLESHOOTING PROCEDURE SYSTEM TROUBLESHOOTING PROCEDURE 2.1 Basics of troubleshooting 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 64 '18 • KX-SM-292 2.2 Explanation of troubleshooting 2.2 Explanation of troubleshooting (a) Checking 15V on the control PCB (Step to check if the inverter PCB fails or not) Use this to diagnose E41, E42, E45 and E48. Power OFF (Power source circuit breaker OFF) Fan motor check *Be sure to check both fan motor 1 and 2 Be sure to wait for 3 minutes after turning the...
Page 65 '18 • KX-SM-292 2.3 Contents of troubleshooting 2.3 Contents of troubleshooting (a) List of inspection displays 1) Indoor and outdoor units Remote 7-segment control Name of inspection Classification Page display error code – Remote control communication error Communication error – Duplicated indoor unit address Address setting error –...
Page 66 '18 • KX-SM-292 Troubleshooting Green Error code Content Keeps flashing Stays Off Indoor None Remote control: Operates but does not cool 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 It is normal.
Page 67 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Operates but does not heat 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 It is normal.
Page 68 '18 • KX-SM-292 Green Error code Content Stays Off Stays Off Indoor Remote control: None Earth leakage breaker activated 7-segment display: Stays Off Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the insulation resistance Replace compressor. * and and coil resistance of compressor OK? 2.
Page 69 '18 • KX-SM-292 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (1/3) 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 70 '18 • KX-SM-292 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (2/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 1/3 Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.
Page 71 '18 • KX-SM-292 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (3/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 2/3 If insufficient cooling [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling...
Page 72 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Louver motor anomaly 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 73 '18 • KX-SM-292 Green Error code Content Power source system anomaly Stays Off Stays Off Indoor Remote control: None (Power source to indoor unit PCB) 7-segment display: Stays Off 2 times flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC 220-240V/220V...
Page 74 '18 • KX-SM-292 Green Error code Content Power source system error Stays Off Keeps lighting Indoor Remote control: None (Power source 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 75 '18 • KX-SM-292 Green Error code Content Indoor Remote control: Keeps flashing Stays Off WAIT 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 controller for more than 2 is kept on WAIT...
Page 76 '18 • KX-SM-292 Green Error code Content 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 77 '18 • KX-SM-292 Green Error code Content 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 Does...
Page 78 '18 • KX-SM-292 Green Error code Content 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 is kept on WAIT...
Page 79 '18 • KX-SM-292 Green Error code Content 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 unit control PCB stays OFF) In case that LED on outdoor unit control PCB stays Once turn OFF the breaker...
Page 80 '18 • KX-SM-292 Green Error code Content 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) Isn't there any short circuit...
Page 81 '18 • KX-SM-292 Green Error code Content Stays OFF Stays Off Indoor 〔 No display 〕 Remote control: [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 82 '18 • KX-SM-292 Green Error code Content 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 83 '18 • KX-SM-292 Green Error code Content Keeps flashing Keeps flashing Indoor Remote control: Duplicated indoor unit address 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 84 '18 • KX-SM-292 Green Error code Content Keeps flashing 2 times flash Indoor Remote control: E3/5 Outdoor unit signal line error 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 85 '18 • KX-SM-292 Green Error code Content Keeps flashing *See below Indoor Remote control: Communication error during operation 7-segment display: Keeps flashing 2 time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor unit red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor unit terminal block Is the...
Page 86 '18 • KX-SM-292 Green Error code Content Indoor unit heat exchanger Keeps flashing 1 time flash Indoor Remote control: temperature sensor 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 sensor connected securely.
Page 87 '18 • KX-SM-292 Green Indoor return air Error code Content Keeps flashing 1 time flash Indoor Remote control: temperature sensor 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 sensor connected securely.
Page 88 '18 • KX-SM-292 Green Error code Content Keeps flashing 1 time flash Indoor Remote control: Drain trouble 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDT, FDTC, FDTW, FDTQ, Diagnosis Countermeasure FDTS, FDR, FDU, FDUM, and FDQS series Check the error data in the remote control.
Page 89 '18 • KX-SM-292 Green Error code Content Excessive number of indoor units (moe than 17 units) Keeps flashing Stays Off Indoor Remote control: by controlling one remoto control 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 90 '18 • KX-SM-292 Green Error code Content 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 91 '18 • KX-SM-292 Green Error code Content Indoor fan motor anomaly Keeps flashing 1 time flash Indoor Remote control: (FDT series) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDT series only Diagnosis Countermeasure Does any foreign matter intervene Remove foreign matter.
Page 92 '18 • KX-SM-292 Green Error code Content Indoor fan motor anomaly Keeps flashing 1 time flash Indoor Remote control: (FDK series) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDK series only Diagnosis Countermeasure Does any foreign matter intervene Remove foreign matter.
Page 93 '18 • KX-SM-292 Green Error code Content Indoor unit operation check, Keeps flashing 1 time flash Indoor Remote control: drain pump 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...
Page 94 '18 • KX-SM-292 Green Error code Content Remote control Keeps flashing Stays Off Indoor Remote control: temperature sensor 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 sensor connected securely.
Page 95 '18 • KX-SM-292 Green Error code Content Unmatch connection of Keeps flashing Stays Off Indoor Remote control: indoor and outdoor unit 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Is the wiring connection between Correct the wiring.
Page 96 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Duplicated outdoor unit address No. 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 97 '18 • KX-SM-292 Green Error code Content Open L3 Phase on Keeps flashing Stays Off Indoor Remote control: power source at primary side 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 98 '18 • KX-SM-292 Green Error code Content Discharge pipe temperature Keeps flashing Stays Off Indoor Remote control: error (Tho-D1) 7-segment display: E36-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 99 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Liqiud flooding anomal 7-segment display: E36-3 Keeps flashing 3 times 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 operating condition.
Page 100 '18 • KX-SM-292 Outdoor unit heat exchanger Green Error code Content temperature sensor (Tho-R) and subcooling coil Keeps flashing Stays Off Indoor Remote control: temperature sensor (Tho-SC,-H) anomaly 7-segment display: E37-1, 2, 5, 6*1 Keeps flashing Outdoor *1 E37-1: one 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 101 '18 • KX-SM-292 Green Error code Content Outdoor air temperature Keeps flashing Stays Off Indoor Remote control: sensor 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 102 '18 • KX-SM-292 Green Error code Content Discharge pipe temperature Keeps flashing Stays Off Indoor Remote control: sensor anomaly (Tho-D1) 7-segment display: E39-1 Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 103 '18 • KX-SM-292 Green Error code Content High pressure anomaly Keeps flashing Stays Off Indoor Remote control: (63H1-1activated) 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 104 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: E41(E51) Power transistor overheat 7-segment display: E41(E51)-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
Page 105 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Current cut (CM1) 7-segment display: E42-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
Page 106 '18 • KX-SM-292 Green Error code Content Excessive number of indoor units connected, Keeps flashing Stays Off Indoor Remote control: excessive total capacity of connection 7-segment display: E43-1, 2 *1 Keeps flashing Outdoor *1 E43-1:1 time flash (Excessive number of indoor units connected), E43-2 :2 time flash (Excessive capacity of indoor units connection) 5.
Page 107 '18 • KX-SM-292 Green Error code Content Communication error between Keeps flashing Stays Off Indoor Remote control: inverter PCB and outdoor unit control PCB 7-segment display: E45-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of...
Page 108 '18 • KX-SM-292 Green Error code Content 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 109 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Outdoor unit DC fan motor anomaly 7-segment display: E48-1, 2 *1 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.
Page 110 '18 • KX-SM-292 Green Error code Content 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.
Page 111 '18 • KX-SM-292 Green Error code Content Suction pipe temperature sensor anomaly (Tho-S), Keeps flashing Stays Off Indoor Remote control: E53/E55 7-segment display: E53/E55-1 Under-dome temperature sensor anomaly (Tho-C1) Keeps flashing 1 time ﬂash Outdoor E53: Tho-S, E55-1: Tho-C1 5. Troubleshooting 1.
Page 112 '18 • KX-SM-292 Green Error code Content High pressure sensor anomaly (PSH) Keeps flashing Stays Off Indoor Remote control: 7-segment display: E54-1, 2 *1 Low pressure sensor anomaly (PSL) Keeps flashing Outdoor *1 E54-1: 1 time flash (PSL), E54-2 : 2 time flash (PSH) 5.
Page 113 '18 • KX-SM-292 Green Error code Content Power transitor temperature Keeps flashing Stays Off Indoor Remote controller: sensor anomaly (Tho-P1) 7-segment display: E56-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 114 '18 • KX-SM-292 Green Error code Content Anomalous compressor Keeps flashing Stays Off Indoor Remote control: by loss of synchronism 7-segment display: E58-1 Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating condition.
Page 115 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Compressor startup failure (CM1) 7-segment display: E59-1 Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of operating conditions.
Page 116 '18 • KX-SM-292 Green Error code Content Rotor position detection failure Keeps flashing Stays Off Indoor Remote control: (CM1) 7-segment display: E60-1 Keeps flashing 1 time ﬂash Outdoor 5. Troubleshooting 1. Applicable model Outdoor unit Diagnosis Countermeasure Check and save the data of Save data for 30 minutes before stopping in Mente PC operating conditions.
Page 117 '18 • KX-SM-292 Green Error code Content Keeps flashing Stays Off Indoor Remote control: Emergency stop 7-segment display: Keeps flashing 1 time flash Outdoor 5. Troubleshooting 1. Applicable model Indoor unit Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC Check the conditions whether it occurs...
Page 118 '18 • KX-SM-292 2.4 Outdoor unit control PCB replacement procedure 2.4 Outdoor unit control PCB replacement procedure PCB012D017G 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 119 '18 • KX-SM-292 Fan motor voltage measurement point (between L63, L64) PCB voltage measurement point (between F1, DS1(-)) Fig.1 Voltage measurement points Target PCB Appearance of the controller – –...
Page 120 '18 • KX-SM-292 2.5 Inverter PCB replacement procedure 2.5 Inverter PCB replacement procedure PCB012D018AB 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 '18 • KX-SM-292 Fan motor voltage measurement point (L63 - L64) Target pwb PCB voltage measurement point Pwb voltage measurement point PCB voltage measurement point (F1-DS(-)) Fig.1 Voltage measurement points Fig.1 Voltage Measurement Points Terminal Harness Snubber capacitor Inverter PCB Connection binder Power transistor (Metallic pillar)
Page 122 '18 • KX-SM-292  Function of DIP switch for control •SW5 (Function setting) •SW3 (Function setting) Switch Function ON/OFF Function Inspection LED reset Test run switch Test run SW3-1 SW5-1 Normal Test run switch Normal Forced cooling/heating Test run operation mode Cooling SW3-7 SW5-2 Normal...
Page 123 '18 • KX-SM-292 ●DIP Switch setting list (1) Outdoor unit (a) Control PCB Switch Description Default setting Remarks Outdoor address No. (Order of 10) Outdoor address No. (Order of 1) Inspection LED reset Normal*/Reset Normal SW3-1 SW3-2 Spare keep OFF Spare keep OFF SW3-3...
Page 124 '18 • KX-SM-292 3. ELECTRICAL WIRING Models FDC224KXZME1, 280KXZME1 PCB004Z334 – –...
Page 125 '18 • KX-SM-292 Model FDC335KXZME1 PCB004Z335 – –...
Page 126 '18 • KX-SM-292 4. PIPING SYSTEM Model FDC224KXZME1, 280KXZME1 Accumulator Compressor accumulator Heat exchanger Heat exchanger – –...
Page 127 '18 • KX-SM-292 Model FDC335KXZME1 Accumulator Compressor accumulator Heat exchanger Heat exchanger – –...
Page 128 '18 • KX-SM-292 5. APPLICATION DATA PSC012D119 5.1 Installation of outdoor unit Outdoor unit capacity F D C2 24 - 335 ◎This installation manual deals with outdoor units and general installation speciﬁcations only. For indoor units, please refer to the respective installation manuals supplied with your units. ◎Please read this manual carefully before you set to installation work and carry it out according to the instructions contained in this manual.
Page 129 '18 • KX-SM-292 Notabilia as a unit designed for R410A Dedicated R410A tools a） 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. ● b）...
Page 130 '18 • KX-SM-292 2-2. Installation space (Ex. servicing space) a) Minimum installation space (Unit : mm) (Please select an installation point with due attention to the direction of installation of the refrigerant pipe) Sample Ⅰ Ⅱ Ⅲ Size (If the installation conditions shown in this drawing are not satisﬁed, please consult with your dealer inlet or the manufacturer.) Ｌ1...
Page 131 secured between the Wind direction blowing outlet and the wall.) Fasten with anchor bolts '18 • KX-SM-292 (3) Pipe size selection Branch pipe set for indoor unit side Header set for indoor unit side Outdoor unit Model: HEAD Model: DIS 500) Branch pipe set for indoor unit side Model: DIS...
Page 132 '18 • KX-SM-292 4-2. Piping work (1) Pipe connecting position and pipe outgoing direction Legend A　Attached pipe connecting outlet at refrigerant gas side B　Pipe connection outlet at liquid refrigerant side (Slot 50x94) C　Refrigerant pipe outlet D　Power cable outlet (ø30) E　 Power cable outlet (ø45) F　...
Page 133 '18 • KX-SM-292 service Service valve size Tightening torque Recommended length of tool handle Tightening angle Do not hold the valve cap area with a spanner. (mm) (N ・ m) (mm) (° ) ø 6.35 （1/4"） 14- 18 45- 60 ø...
Page 134 φ φ φ 15.88 15.88 19.7 15.88 '18 • KX-SM-292 (2) Air purge Perform the air purge from both the check joints at ﬂuid side and gas side. <Work ﬂow> CAUTION After letting it alone for Operate the vacuum pump for more than 1 hour Insufﬁcient degree of vacuum more than 1 hour, the after achieving -10 kPa or under (-765 mmHg or...
Page 135 State at shipping (closed) State of open Fluid/gas service valve ・Open the valve stem till it hits the stopper. No need to apply ・After the adjustment, replace the cap as it force more than that. was. ・ After the adjustment, replace the blind nut as it was. '18 •...
Page 136 When units of FD○△△KXE6 Series, FD○△△KXZE1 series and units of FD○A△△KXE4 and 5 Series are connected in a mixture: Standard resistance value=46,000/[(Number of connected FD ○ A △△ KXE4 and 5 Series units x 5) + (Number of connected FD○△△KXE6 and KXZ Series units x 9)] The number of connected units includes those of indoor units, outdoor units and SL devices..
Page 137 '18 • KX-SM-292 7. CONTROL SETTINGS 7-1. Unit address setting This control system controls the controls of more than one air-conditioner's outdoor unit, indoor unit and remote control unit through communication control, using the microcomputers built in the respective controls. Address setting needs to be done for both outdoor and indoor units. Turn on power in the order of the outdoor units and then the indoor units. Use 1 minute as the rule of thumb for an interval between them.
Page 138 Within - 300 0.75ｍｍ shown in the table. Within - 400 1.25ｍｍ ● Use 3-core wires for or 2-core wires for FD○A△△KXE4 FD○△△KXE6 Within - 600 2.0ｍｍ '18 • KX-SM-292 Unless stated otherwise, the following procedures apply, when new SL is chosen for the communication protocol. When previous SL is chosen, use ﬁgures shown in [ ] in carrying out these procedures.
Page 139 Since the models FDT224 and 280 have 2 PCBs per unit, set different indoor unit No. and SW on each PCB. An outdoor unit No., which is used to identify which outdoor unit and indoor units are connected in a refrigerant system, is set on outdoor unit PCB and indoor unit PCB. Give the same outdoor unit ●...
Page 140 '18 • KX-SM-292 Operating procedure ● (1) When single indoor unit is connected to the remote control. Item Operation Display ① Press the AIR CON No. switch for 3 seconds or longer. [CHANGE ADD. ▼ ] Address change mode [CHANGE ADD. ▼ ] ②...
Page 141 '18 • KX-SM-292 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: Previos 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 142 When “SET COMPLETE” is shown, indoor unit No.’s are registered. Turn on power to central control equipment after the addresses are determined. NOTICE Turning on power in wrong order may result in a failure to recognize addresses. '18 • KX-SM-292 7-2.
Page 143 '18 • KX-SM-292 8. TEST OPERATION AND TRANSFER ment 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 tester, is greater than 1 MΩ. (2) When the resistance of the signaling line terminal block is 100 or less before turning the power on, the power cables may be connected to the signaling line terminal block. Check the wiring referring to the standard resistance value of 6-3.
Page 144 '18 • KX-SM-292 5.2 Check operation procedure PCB012D027A Check operation It is recommended to practice the check operation before the test run. (You may test run or perform normal operation even if the check operation is not performed.) For details of check operation, refer to the technical manual. Important: ・Before starting the check operation, complete the address setting of indoor and outdoor units and the refrigerant charge.
Page 145 '18 • KX-SM-292 5.3 Method for connecting the accessory pipe PSB012D917G Be sure to use the accessory pipe to connect the operation valve on the gas side with the field pipe. Connect the attached pipe according to the following steps ① - ⑤ . When tightening the flare, connect the pipe securely by pressing the flared face of pipe against the operation valve.
Page 146 '18 • KX-SM-292 【Connection example Ⓐ～Ⓓ applicable to the connecting direction.】 Service valve connecting Heat insulating material position at gas side (Accessory) Band (Accessory) Accessory pipe Internal face of base Accessory pipe position Heat insulating method (Fig. 1) (Fig. 2) Straight pipe ①...
Page 147 '18 • KX-SM-292 5.4 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 148 '18 • KX-SM-292 Branching pipe set type Gas side Liquid side Different diameter pipe joint HEAD4-22-1G None IDφ12.7 IDφ9.52 HEAD6-180-1G IDφ 15.88 1 pc. 1 pc. IDφ9.52 HEAD8-371-2 IDφ15.88 1 pc. 1 pc. IDφ12.7 IDφ9.52 HEAD8-540-3 1 pc. 1 pc. IDφ15.88 IDφ12.7 IDφ9.52...
Page 149 '18 • KX-SM-292 ・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...
Page 150 '18 • KX-SM-292 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 151 '18 • KX-SM-292 6. OUTDOOR UNIT DISASSEMBLY PROCEDURE OUTDOOR UNIT DISASSEMBLY PROCEDURE PCA012D087 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 152 '18 • KX-SM-292 PROCEDURE & PICTURES 9. To remove the compressor (CM) Terminal cover (1) Remove the service panel.(See No.1) (2) Remove the insulation which covers compressors. (Strings (a) (d) should be loosen.) (3) Remove 3 terminal cover ﬁxing bolts( mark) and remove it and disconnect the power wiring.
Page 153 '18 • KX-SM-292 7. INDOOR UNIT DISASSEMBLY PROCEDURE 7. 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 154 '18 • KX-SM-292 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 155 '18 • KX-SM-292 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 '18 • KX-SM-292 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 157 '18 • KX-SM-292 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 '18 • KX-SM-292 PROCEDURE & PICTURES 6. To remove the drain pump(DM) and ﬂoat 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 ﬂoat switch ﬁxing screw and remove it.( mark)
Page 159 '18 • KX-SM-292 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 '18 • KX-SM-292 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 161 '18 • KX-SM-292 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 '18 • KX-SM-292 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 163 '18 • KX-SM-292 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 '18 • KX-SM-292 PROCEDURE & PICTURES 7. To remove the drain pump(DM) and ﬂoat 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 165 '18 • KX-SM-292 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 '18 • KX-SM-292 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 167 '18 • KX-SM-292 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 '18 • KX-SM-292 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.
Page 169 '18 • KX-SM-292 PHA012D402 – –...
Page 170 '18 • KX-SM-292 Screw – –...
Page 171 '18 • KX-SM-292 – –...
Page 172 '18 • KX-SM-292 – –...
Page 173 '18 • KX-SM-292 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 174 '18 • KX-SM-292 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 175 '18 • KX-SM-292 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 '18 • KX-SM-292 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 177 '18 • KX-SM-292 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 '18 • KX-SM-292 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 179 '18 • KX-SM-292 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 '18 • KX-SM-292 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 181 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

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