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Mitsubishi Heavy Industries SRK20ZJX-S Service Manual
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Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

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SERVICE MANUAL

INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM40ZJ-S
SCM45ZJ-S
SCM50ZJ-S
SCM60ZJ-S
SCM71ZJ-S
SCM80ZJ-S
(INDOOR UNIT)
Wall mounted type
SRK20ZJX-S
SRK25ZJX-S
SRK35ZJX-S
SRK50ZJX-S
SRK60ZJX-S
SRK20ZJ-S
SRK25ZJ-S
SRK35ZJ-S
SRK50ZJ-S
Floor standing type
SRF25ZJX-S
SRF35ZJX-S
SRF50ZJX-S
Ceiling cassette-4way compact type
FDTC25VD
FDTC35VD
FDTC50VD
FDTC60VD
Manual No.'10•SCM-SM-094
Ceiling concealed type
SRR25ZJ-S
SRR35ZJ-S
SRR50ZJ-S
SRR60ZJ-S

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Summary of Contents for Mitsubishi Heavy Industries SRK20ZJX-S

  • Page 1: Service Manual

    (Split system, air to air heat pump type) (OUTDOOR UNIT) SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S SCM60ZJ-S SCM71ZJ-S SCM80ZJ-S (INDOOR UNIT) Wall mounted type Floor standing type Ceiling concealed type SRK20ZJX-S SRF25ZJX-S SRR25ZJ-S SRK25ZJX-S SRF35ZJX-S SRR35ZJ-S SRK35ZJX-S SRF50ZJX-S SRR50ZJ-S SRK50ZJX-S SRR60ZJ-S SRK60ZJX-S Ceiling cassette-4way compact type...
  • Page 2 '10 • SCM-SM-094 '10 • SCM-SM-094 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....1.1 SRK,SRF and SRR series ..............(1) Operation control function by remote controller ........(2) Unit ON/OFF button ................(3) Auto restart function ................. (4) Custom cord switching procedure ............
  • Page 3 '10 • SCM-SM-094 '10 • SCM-SM-094 1.7 External control (remote display)/control of input signal ....32 (1) External control (remote display) output ..........32 (2) Control of input signal ................. 32 1.8 Protective control function ..............33 (1) Frost prevention control ..............

  • Page 4: Table Of Contents

    '10 • SCM-SM-094 '10 • SCM-SM-094 (9) Checking the indoor electrical equipment ........57 (10) How to make sure of wireless remote controller ......58 (11) Outdoor unit inspection points ............59 2.2 FDTC series ..................63 2.2.1 Diagnosing of microcomputer circuit ........

  • Page 5: Table Of Models

    '10 • SCM-SM-094 '10 • SCM-SM-094 ■Table of models Capacity Model ○ ○ ○ ○ ○ Wall mounted type (SRK-ZJX-S) ○ ○ ○ ○ Wall mounted type (SRK-ZJ-S) ○ ○ ○ Floor standing type (SRF) ○ ○ ○ ○ Ceiling concealod type (SRR) Ceiling cassette-4way compact type ○...

  • Page 6: Outline Of Operation Control By Microcomputer

    '10 • SCM-SM-094 1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 SRK, SRF and SRR series (1) Operation control function by remote control Remote controller SRK series Operation section FAN SPEED button OPERATION MODE select button ON/OFF (luminous) button HI POWER/ECONO button AIR FLOW (UP/DOWN) button TEMPERATURE button AIR FLOW (LEFT/RIGHT) button...

  • Page 7: Operation Section

    '10 • SCM-SM-094 SRR series Operation section Unit indication section Model SRK20~60ZJX-S Unit ON/OFF button This button can be used for turning on/off the unit when RUN (HOT KEEP) light (green/blue) remote controller is not available. Illuminates during operation. • green : except ECONO operation Remote controller signal receiver blue : ECONO operation...

  • Page 8: Unit Display Section

    '10 • SCM-SM-094 Model SRK20~50ZJ-S Remote control signal receiver Unit ON/OFF button This button can be used for turning on/off the unit when remote control is not available. RUN (HOT KEEP) light (green) 3D AUTO light (green) Illuminates during operation. Illuminates during 3D AUTO operation.

  • Page 9: Unit On/Off Button

    '10 • SCM-SM-094 Model SRR25~60ZJ-S RUN (HOT KEEP) light (green) ・Illuminates during operation. ・Blinks when airflow stops due to the‘HOT KEEP’and‘CLEAN operation’. Remote control signal receiver 1.5 sec. HOT KEEP 0.5 sec. 3 sec. CLEAN operation Unit ON/OFF button This button can be used for turning on/off the 1 sec.

  • Page 10: Auto Restart Function

    '10 • SCM-SM-094 (3) Auto restart function Auto restart function records the operational status of the air-conditioner immediately prior to be switched off by a power cut, and then automatically resumes operations after the power has been restored. The following settings will be cancelled: Timer settings HIGH POWER operations Notes (1) Auto restart function is set at on when the air-conditioner is shipped from the factory.

  • Page 11: Flap And Louver Control

    '10 • SCM-SM-094 Modifying the wireless remote controller Remove the battery. Cut the jumper wire shown in the figure at right. (5) Flap and louver control (SRK and SRF series only) SRK series     Control the flap and louver by AIRFLOW (UP/DOWN) and (LEFT/RIGHT) button on the wireless remote controller.
  • Page 12 '10 • SCM-SM-094 Swing Swing flap Swing louver Flap moves in upward and downward Louver moves in left and right directions continuously. directions continuously. In HEAT operation In COOL, DRY, FAN operation Approx.5°(10°) Approx. 20°(25°) Approx. 60° Approx. 75°(70°) Note (1) value in ( ) are for the model SRK20~50ZJ-S. Memory flap (Flap or Louver stopped) When you press the AIRFLOW (UP/DOWN or LEFT/RIGHT) button once while the flap or louver is operating, it stops swinging at the position.

  • Page 13: Air Outlet Selection (Srf Series Only)

    '10 • SCM-SM-094 (6) Air outlet selection (SRF series only) AIR SELECTION button can switch between the combination of upper and lower air outlets and upper air outlet. Not operable while the air conditioner is OFF. Each time the AIR SELECTION button is pressed. The combination of the upper and lower air outlets and the upper air outlet can be switched.

  • Page 14: Timer Operation

    '10 • SCM-SM-094 Air flow direction is controlled according to the indoor temperature and setting temperature. When 3D auto operation starts Cooling Heating Flap Up/down Swing Wide (fixed) Center (fixed) Louver When Indoor temp. – Setting temp. is < = 5ºC during cooling and when Setting temp.

  • Page 15: Installation Location Setting (Srk Series Only)

    '10 • SCM-SM-094 (9) Installation location setting (SRK series only) When the indoor unit is installed at the end of a room, control the air flow direction so that it is not toward the side walls. If you set the remote controller installation position, keep it so that the air flow is within the range shown in the following figure. Setting If the air conditioning unit is running, press the ON/OFF button to stop.

  • Page 16: Drain Motor (Dm) Control (Srr Series Only)

    '10 • SCM-SM-094 (11) Drain motor (DM) control (SRR series only) (a) Drain motor (DM) is operated during the cooling or dehumidifying mode operations and simultaneously wity the com- pressor ON. The DM continues to operate for 5 minutes after the operation stop, anomalous stop, thermostat stop or when it was switched from the cooling and dehumidifying operations to the fan or heating operation.

  • Page 17: Fdtc Series

    '10 • SCM-SM-094 FDTC series (1) Remote controller (Option parts) Wired remote controller The figure below shows the remote controller 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 18 '10 • SCM-SM-094 Wireless remote controller 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 19: Operation Control Function By The Wired Remote Controller

    '10 • SCM-SM-094 (2) Operation control function by the wired remote controller Switching sequence of the operation mode switches of remote controller [CPU reset] This functions when “CHECK” and “GRILL” buttons on the remote controller are pressed simultaneously. Operation is same as that of the power supply reset.

  • Page 20: Operation Control Function By The Indoor Controller

    '10 • SCM-SM-094 (3) Operation control function by the indoor controller Auto operation If “Auto” mode is selected by the remote controller, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature.
  • Page 21 '10 • SCM-SM-094 Timer operation Sleep timer Set the duration of time from the present to the time to turn off the air-conditioner. It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the sleep timer setting, the remaining time is displayed with progress of time in the unit of hour.
  • Page 22 '10 • SCM-SM-094 Hot keep Hot keep control is performed at the start of the defrost control. Control When the indoor heat exchanger temperature (detected with Th -R1 or R2) drops to 35°C or lower, the speed of indoor fan is changed to the lower tap at each setting. During the hot keep, the louver horizontal control signal is transmitted.
  • Page 23 '10 • SCM-SM-094 Automatic louver level setting during heating At the hot start with the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto swing or louver stop), the louver takes the level position (In order to prevent the cold start). The louver position display LCD continues to show the display which has been shown before entering this control.
  • Page 24 '10 • SCM-SM-094 (m) Operation check/drain pump test run operation mode If the power is turned on by the dip switch (SW7-1) on the indoor PCB when electric power source is supplied, it enters the mode of operation check/drain pump test run. It is ineffective (prohibited) to change the switch after turning power on. When the communication with the remote controller has been established within 60 seconds after turning power on by the dip switch (SW7-1) ON, it enters the operation check mode.
  • Page 25 '10 • SCM-SM-094 Plural unit control – Control of 16 units group by one remote controller Function One remote controller switch can control a group of multiple number of unit (Max. 16 indoor units). “Operation mode” which is set by the remote controller switch can operate or stop all units in the group one after another in the order of unit .
  • Page 26 '10 • SCM-SM-094 Operation permission/prohibition (In case of adopting card key switches or commercially available timers) When the indoor function setting of wired remote controller for “Operation permission/prohibition” is changed from “Invalid (Factory default)” to “ Valid”, following control becomes effective. Optional Card key Blue...
  • Page 27 '10 • SCM-SM-094 Remote operation input Remote operation input connector (CnT-6) is provided on the indoor control PCB. However remote operation by CnT-6 is not effective, when “Center mode” is selected by center controller. In case of plural unit (twin, triple, double twin), remote operation input to CnT-6 on the slave indoor unit is invalid. Only the “LEVEL INPUT”...
  • Page 28 '10 • SCM-SM-094 Individual operation (Factory default) All units operation (Local setting) Only the unit Only the unit All units in one All units in one directly connected directly connected remote controller remote controller CnT-6 to the remote to the remote system can be system can be controller can be...

  • Page 29: Outline Of Heating Operation

    '10 • SCM-SM-094 1.3 Outline of heating operation (1) Summary (a) Capacity control 1) Indoor unit SRK 20~60 ZJX-S models only Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S SCM60ZJ-S SCM71ZJ-S SCM80ZJ-S Capacity 1.4 ~ 6.9 kW 1.4 ~ 7.4 kW 1.4 ~ 7.5 kW 1.5 ~ 7.8 kW 1.5 ~ 9.4 kW 1.5 ~ 9.8 kW...

  • Page 30: Defrosting Operation

    '10 • SCM-SM-094 (4) Defrosting operation (Th2) (Th1) > = 0.44 × (Th2) + A 2 °C < = Th2 15 °C < = Th2 < 2 °C Th2 < 15 °C Defrost operation start Defrost operation start Outdoor air temperature (℃) Outdoor air temperature (℃) º...

  • Page 31: Outline Of Cooling Operation

    '10 • SCM-SM-094 1.4 Outline of cooling operation (1) Summary (a) Capacity control 1) Indoor unit SRK xx ZJX-S models only Model SCM40ZJ-S SCM45ZJ-S SCM50ZJ-S SCM60ZJ-S SCM71ZJ-S SCM80ZJ-S Capacity 1.8 ~ 5.9 kW 1.8 ~ 6.4 kW 1.8 ~ 7.1 kW 1.8 ~ 7.5 kW 1.8 ~ 8.8 kW 1.8 ~ 9.2 kW...

  • Page 32: Fdtc Series

    '10 • SCM-SM-094 (b) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous operation mode, changes the operation mode. (c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is se- lected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.

  • Page 33: Operation Permission/Prohibition Control

    '10 • SCM-SM-094 1.6 Operation permission/prohibition control (Refer to the FDTC series by 25 page) The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor PCB and inputting the external signal into the CnT. Note (1) Please install the separately-sold Interface kit (SC-BIK-E). Remove the jumper wire (J1 or J3) from the Interface kit circuit board. (1) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor PCB.

  • Page 34: Protective Control Function

    '10 • SCM-SM-094 (a) Level input If the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB of indoor unit) are set, or “LEVEL INPUT” is se- lected in the wired remote control’s indoor unit settings. 1) Input signal to CnT OFF  ON Air conditioner ON 2) Input signal to CnT ON ...

  • Page 35: Cooling High Pressure Control

    Model SCM 40~80 ZJ-S '10 • SCM-SM-094 Item Outdoor air temperature Lower limit speed (b) Detail of operation Outdoor air temperature ( º (c) Reset conditions: (3) Cooling high pressure control (a) Purpose: (b) Detector: (c) Detail of operation: (Example) Fuzzy 8rps After lapse of 30 sec.

  • Page 36: Heating High Pressure Control

    '10 • SCM-SM-094 (5) Heating high pressure control (a) Indoor unit side 1) Start condition: When the indoor heat exchanger temperature (Th2) has become higher than the start temperature for 1 minute continuously. 2) Contents of control: Compressor stop Item Indoor Release temperature Start temperature...

  • Page 37: Heating Low Outdoor Temperature Protective Control

    B or D B or D when the thermo becomes OFF, the speed is '10 • SCM-SM-094 B or D. (model 60 ~ 80:11 ). 3) Reset conditions: Upper C Unit: rps Lower D Upper A Item Model Lower B SCM40, 45 SCM50 SCM60, 71, 80...

  • Page 38: Inching Prevention

    '10 • SCM-SM-094 (b) Detail of operation The crankcase heater operates, warming up the compressor, then refrigerant begins circulating smoothly when the cooler starts its heating operation, and heating begins. (c) Restoration conditions When the temperature detected by the outdoor air temperature (Th2) reaches 12°C or higher, or the operation mode chang- es from stop to cooling or heating.

  • Page 39: Outdoor Unit Failure

    Cooling Heating Model 40 ~ 50 32 rps 32 rps Lower limit speed 60 ~ 80 25 rps 32 rps '10 • SCM-SM-094 2) Control value Unit: A (12) Current safe (a) Purpose: Current safe Current safe Current safe Model (b) Detail of operation: Cooling Heating...

  • Page 40: Serial Signal Transmission Error Protection

    Cooling Heating Model 40: Less than 40 Model 40: 40 or more Model 40: Less than 56 Model 40: 56 or more Model 45: Less than 40 Model 45: 40 or more Model 45: Less than 56 Model 45: 56 or more Compressor speed (rps) '10 •...

  • Page 41: Outdoor Unit Fan Control At Overload

    (c) Reset conditions: '10 • SCM-SM-094 Heating (a) Operating conditions: (b) Detail of operation: (c) Reset conditions: (22) Outdoor unit fan control at overload Cooling (a) Start condition: When the outdoor air temperature (Th2) has risen higher than 41°C for 30 seconds continuously while the compressor is operating.

  • Page 42: Maintenance Data

    '09•SRK-DB-087D '10 • SCM-SM-094 2 MAINTENANCE DATA Reference Reference 2.1 SRK, SRF and SRR series 2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT (1) Cautions %&'" ()"*+,"&-."/01&11.234056"&5/"78.79056"&5"&0-"7+5/0:0+5.-;"3."1,-.":+":,-5"+))":8."<+=.-"3.)+-."3.6055056>"?8.5"=+-9056" +5"05/++-",50:1;"4.:":8.",50:"10:")+-"&3+,:"@"205,:."&):.-":,-5056"+))":8."<+=.-"3.)+-."*+,"3.605"=+-9>"?8.5"=+-9056"+5"&5" +,:/++-",50:;":8.-."2&*"3."&5".4.7:-07&4"78&-6."&<<40./":+":8."2&05"70-7,0:"%.4.7:-+4*:07"7+5/.51.-';""1+"3.605"=+-9"+54*"&):.-" /0178&-6056":801".4.7:-07&4"78&-6."%:+"AB"@C"D"+-"4+=.-'> %3'" ?8.5":&9056"+,:"<-05:./"70-7,0:"3+&-/1;"3."1,-.":+"/+"1+"=0:8+,:".E.-:056")+-7."+5":8."70-7,0:"3+&-/1"+-"<&79&6."7+2<+5.5:1> %7'" ?8.5"/017+55.7:056"&5/"7+55.7:056"7+55.7:+-1;":&9."8+4/"+)":8."7+55.7:+-"8+,1056"&5/"/+"5+:"<,44"+5":8."4.&/"=0-.1> (2) Items to check before troubleshooting %&'" F&G."*+,":8+-+,684*"05G.1:06&:./":8."/.:&041"+)":8.":-+,34."=8078":8."7,1:+2.-"01"7+2<4&05056"&3+,:H %3'"...

  • Page 43: Troubleshooting Procedure (If The Air Conditioner Runs)

    '10 • SCM-SM-094 (4) Troubleshooting procedure (If the air conditioner runs) 44 ~ 50. 44 ~ 50.

  • Page 44: Self-Diagnosis Table

    '09•SRK-DB-087D '10 • SCM-SM-094 (5) Self-diagnosis table Wired Outdoor Indoor unit display panel Description remote main PCB Cause Display (flashing) condition controller TIMER of trouble Red LED display light light • Broken heat exchanger sensor When a heat exchanger sensor 1 wire disconnection is detected while 1 time Stays operation is stopped.

  • Page 45: Service Mode (Trouble Mode Access Function)

    '09•SRK-DB-087D '10 • SCM-SM-094 (6) Service mode (Trouble mode access function) (a) Explanation of terms Explanation Term The service mode is the mode where service data are displayed by flashing of the display lights Service mode when the operations in item (b) below are performed with the indoor controller. These are the contents of error displays and protective stops which occurred in the past in the air conditioner system.
  • Page 46 '09•SRK-DB-087D '10 •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elf-diagnosis data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emote controller setting Contents of output data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

  • Page 47: Remote Controller Setting

    '09•SRK-DB-087D '10 • SCM-SM-094 (Example) Remote controller setting Operation Displayed data Fan speed Temperature switching switching setting Displays the reason for the stop (error code) the previous time an error was displayed. 21ºC Displays the reason for the stop (error code) 2 times previous when an error was displayed. 22ºC Cooling 23ºC...
  • Page 48 '09•SRK-DB-087D '10 • SCM-SM-094 (c) Error code, stop code table Number of flashes when in service mode Stop coad Error Auto TIMER Error content Cause Occurrence conditions display recovery light Error coad light (10's digit) (1's digit) Normal Can not receive signals for 35 Power supply is faulty.
  • Page 49 '09•SRK-DB-087D '10 •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d) Remote controller information tables C+" N5."6@((="678';-8.A *+" M@(25'8&."678';-8.A Display pattern when Display pattern when Fan speed in service mode in service mode...
  • Page 50 '09•SRK-DB-087D '10 • SCM-SM-094 (e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor , suction pipe sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) Sensor value displayed when the error code is normal Sensor name...
  • Page 51 '09•SRK-DB-087D '10 • SCM-SM-094 Discharge pipe sensor table Units: °C TIMER light (1’s digit) RUN light (10’s digit) Buzzer sound (sounds for 0.1 second) (does not sound) %"&'"()"*+,+"+-."-./)-*.*"0.--)-"/)*."12"()-3+456",7."*1284+9"')-".+/7"2.(2)-":./)3.2"+2"27);(":.4);< Sensor value displayed when the error code is normal -64ºC 0=>+384.5"?12/7+-@."818.",.38.-+,A-.B"CDEEFGH %"&(",7."/+2.")'"*12/7+-@."818."*+,+6"3A4,1849",7."-.+*1(@"I+4A.":9"E<"0J.4);6"KD">"E"L"CDEEFGH5 0.1 sec.
  • Page 52 '09•SRK-DB-087D '10 • SCM-SM-094 Service data record form...

  • Page 53: Inspection Procedures Corresponding To Detail Of Trouble

    '09•SRK-DB-087D '10 • SCM-SM-094 (7) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room Discharge pipe sensor temperature characteristics temp., indoor heat exchanger temp., out- door heat exchanger temp., outdoor air temp,outdoor suction pipe temp.) - 10 Temperature (˚C)
  • Page 54 '09•SRK-DB-087D '10 • SCM-SM-094 Current cut Compressor lock, Compressor wiring short circuit, Compressor output is open phase, Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty. Current safe stop Overload operation, compressor lock, overcharge...

  • Page 55: Over Heat Of Compressor

    '09•SRK-DB-087D '10 • SCM-SM-094 Over heat of compressor Gas shortage, defective discharge pipe sensor main Error of signal transmission Wiring error including power cable, defective indoor/ outdoor PCB indoor indoor outdoor sub...

  • Page 56: Outdoor Fan Motor Error

    '09•SRK-DB-087D '10 • SCM-SM-094 Trouble of outdoor unit Insufficient refregerant amount, Faulty power transistor, Broken compressor wire Service valve close, Defective EEV, Defective outdoor PCB main Notes (1) main Check coil resistance, See pages 53. Outdoor fan motor error Defective fan motor, connector poor connection, defective outdoor PCB the fan motor and outdoor Replace outdoor fan motor...

  • Page 57: Phenomenon Observed After Shortcircuit, Wire Breakage On Sensor

    '10 • SCM-SM-094 Rotor lock Defective compressor, defective outdoor PCB main See pages 53. Drain abnormality (SRR only) [Drain piping defective,pump defect, (8) Phenomenon observed after shortcircuit, wire breakage on sensor float switch, indoor PCB] (a) Indoor unit Rotor lock Defective compressor, defective Phenomenon Operation...

  • Page 58: Checking The Indoor Electrical Equipment

    '09•SRK-SM-087D '10 • SCM-SM-094 (b) Outdoor unit Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Heat exchanger sensor Defrosting is performed for 10 minutes at approx. 40 minutes. Heating Cooling Ourdoor air temperature sensor Defrosting is performed for 10 minutes at approx. 40 minutes. Heating Discharge pipe All modes...

  • Page 59: How To Make Sure Of Wireless Remote Controller

    '09•SRK-DB-087D '10 • SCM-SM-094 (C) Power transistor inspection procedure [Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)] (1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the output of the power transistor.
  • Page 60 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Power supply...
  • Page 61 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Black...
  • Page 62 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Color Marks Power supply Remove the fasten terminal and test Mark Color 1 Phase...
  • Page 63 '09•SRK-DB-087D '10 • SCM-SM-094 (a) Inspection of electronic expansion valve • Inspection of electronic expansion valve as a separate unit Measuring point Resistance when normal (b) Outdoor unit fan motor check procedure main main outdoor main main Measuring Resistance when point normal CNFAN...

  • Page 64: Fdtc Series

    '10 • SCM-SM-094 2.2 FDTC series 2.2.1 Diagnosing of microcomputer circuit Selfdiagnosis function (a) Check indicator table Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller error code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
  • Page 65 '10 • SCM-SM-094 (ii) Outdoor unit Outdoor Remote controller Indoor control PCB Reference main PCB Location of trouble Description of trouble Repair method page Green Error code Red LED Red LED Red LED Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger...
  • Page 66 '10 • SCM-SM-094 (iv) Display sequence of error codes or inspection indicator lamps Occurrence of one kind of error Displays are shown respectively according to errors. Occurrence of plural kinds of error Section Category of display Error code on remote controller •...

  • Page 67: Troubleshooting Procedure

    '10 • SCM-SM-094 Error log and reset Error indicator Memorized error log Reset Remote controller display • Higher priority error is memorized. • Stop the unit by pressing the ON/OFF switch of remote controller. Red LED on indoor control PCB •...
  • Page 68 '10 • SCM-SM-094 • Control PCB PSB012D931F Replace and set up the PCB according to this instruction. ① Set to an appropriate address and function using switch on PCB. 　 Select the same setting with the removed PCB. item switch Content of control Address Plural indoor units control by 1 remote controller...
  • Page 69 '10 • SCM-SM-094 • Power PCB PSB012D953A This PCB is a general PCB. Replace the PCB according to this instruction. ① Replace the PCB (refer to right dwg.) 1. Unscrew terminal of the wiring(yellow/green) soldered to PCB from the box. 2.
  • Page 70 '10 • SCM-SM-094 ●DIP switch setting list Switches Description Default setting Remarks Address No. setting at plural indoor units control by 1 R/C SW6-1 SW6-2 Model selection As per model See table 1 SW6-3 SW6-4 Normal * /Test run Test run, Drain motor Normal SW7-1 SW7-2...
  • Page 71 '10 • SCM-SM-094 Check of anomalous operation data with the remote Number Data Item controller (Operation Mode) Operation data can be checked with remote control unit operation. (Set Temperature) Press the button. (Return Air Temperature) The display change “ ” (Remote Controller Thermistor Tempeature) (Indoor Heat Exchanger Thermistor / U Bend) Press the...

  • Page 72: Inverter Checker For Diagnosis Of Inverter Output

    '10 • SCM-SM-094 Inverter checker for diagnosis of inverter output 　 ●Checking method (a) Setup procedure of checker. Power OFF (Turn off the breaker). Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. Connect the wires U (Red) , V (White) and W (Black) of the checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
  • Page 73 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Power supply...
  • Page 74 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Remove the fasten terminal and test Color Marks output voltage Mark Color Black...
  • Page 75 CAUTION- HIGH VOLTAGE High voltage is produced in the control box. Don't touch electrical parts in the control box for 5 minutes after the unit is stopped. ◆Inspection power transistor Color Marks Power supply Remove the fasten terminal and test Mark Color 1 Phase...

  • Page 76: List Of Troubles

    '10 • SCM-SM-094 2.2.2 Troubleshooting flow List of troubles Remote controller display Description of trouble Reference page None Operates but does not cool. None Operates but does not heat. None Earth leakage breaker activated None Excessive noise/vibration (1/3) None Excessive noise/vibration (2/3) None Excessive noise/vibration (3/3) None...

  • Page 77: Troubleshooting

    '10 • SCM-SM-094 Troubleshooting Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: None Operates but does not cool – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air.

  • Page 78: Troubleshooting

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing Stays OFF Remote controller: None Operates but does not heat – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation. Check the temperature differnce between return and supply air.
  • Page 79 '10 • SCM-SM-094 Green Content Error code Indoor Stays OFF Stays OFF Remote controller: None Earth leakage breaker activated Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. coil resistance of compressor? 2.
  • Page 80 '10 • SCM-SM-094 Green Content Error code Indoor – – Remote controller: None Excessive noise/vibration (1/3) – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient Does time has elapsed after noise/vibration stopping the unit, it is occur during or soon after stopping operation...
  • Page 81 '10 • SCM-SM-094 Green Content Error code Indoor – – Remote controller: None Excessive noise/vibration (2/3) 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 the casing.
  • Page 82 '10 • SCM-SM-094 Green Content Error code Indoor – – Remote controller: None Excessive noise/vibration (3/3) 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/ cooling/heating operation is in...
  • Page 83 '10 • SCM-SM-094 Green Content Error code Keeps flashing Stays OFF Indoor Remote controller: None Louver motor failure – 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 84 '10 • SCM-SM-094 Green Content Error code Power supply system error Stays OFF Stays OFF Indoor Remote controller: None (Power supply to indoor control PCB) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between 1 and 2 on the terminal block of indoor unit?
  • Page 85 '10 • SCM-SM-094 Green Content Error code Power supply system error Keeps flashing Stays OFF Indoor Remote controller: None (Power supply to remote controller) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Isn't there any Correct.
  • Page 86 '10 • SCM-SM-094 Green Content Error code INSPECT I/U Keeps flashing Stays OFF Indoor Remote controller: INSPECT I/U (When 1 or 2 remote controllers are connected) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote controller connected? Set one remote controller...
  • Page 87 '10 • SCM-SM-094 Green Content Error code INSPECT I/U Keeps flashing Stays OFF Indoor Remote controller: INSPECT I/U (Connection of 3 units or more remote controller) – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less.
  • Page 88 '10 • SCM-SM-094 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (1/3) Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller LCD displays “ WAIT ”...
  • Page 89 '10 • SCM-SM-094 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (2/3) Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the fuse is blown, the method to inspect outdoor sub PCB before replacing the power Isn’t there...
  • Page 90 '10 • SCM-SM-094 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote controller: WAIT initial operation (3/3) Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote controller display is extinguished after the power on.

  • Page 91: E1 Remote Controller Communication Circuit Error

    '10 • SCM-SM-094 Green Content Error code Remote controller Keeps flashing Stays OFF Indoor Remote controller: communication circuit error – Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Is it possible to Check peripheral reset normally by the power reset? environment.

  • Page 92: E5 Communication Error During Operation

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing 2 times flash Remote controller: Communication error during operation Outdoor – 6 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block. Is the connection of signal Repair signal wires.

  • Page 93: E6 Indoor Heat Exchanger Temperature Thermistor Anomaly

    '10 • SCM-SM-094 Green Content Error code Indoor heat exchanger Indoor Keeps flashing 1 time flash Remote controller: temperature thermistor anomaly Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct.

  • Page 94: E7 Return Air Temperature Thermistor Anomaly

    '10 • SCM-SM-094 Green Content Error code Return air temperature Indoor Keeps flashing 1 time flash Remote controller: thermistor anomaly Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. Connect air temperature thermistor connector.

  • Page 95: E8 Heating Overload Operation

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing 1 time flash Remote controller: Heating overload operation Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the air filter clogged? Wash. Is the 2. Error detection method Defective indoor heat indoor heat exchanger exchanger temperature...

  • Page 96: E9 Drain Trouble

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing 1 time flash Remote controller: Drain trouble Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote controller. Is there any overflow? 2.

  • Page 97: E10 Excessive Number Of Connected Indoor Units (More Than 17 Units) By Controlling With One Remote Controller

    '10 • SCM-SM-094 Excessive number of connected Green Content Error code indoor units (more than 17 units) Indoor Keeps flashing Stays OFF Remote controller: by controlling with one remoto controller Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17...

  • Page 98: Indoor Fan Motor Anomaly

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing Stays OFF Remote controller: Indoor fan motor anomaly Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material Remove foreign material. intervene in rotational area of fan propeller? Does the fan 2.

  • Page 99: Indoor Unit Operation Check, Drain Motor Check Setting Error

    '10 • SCM-SM-094 Green Content Error code Indoor unit operation check, Indoor Keeps flashing 1 time flash Remote controller: drain motor check setting error Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Defective indoor control Is SW7-1 PCB (Defective SW7)

  • Page 100: Remote Controller Temperature Thermistor Anomaly

    '10 • SCM-SM-094 Green Content Error code Remote controller Indoor Keeps flashing Stays OFF Remote controller: temperature thermistor anomaly Outdoor – Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure 2. Error detection method Is the remote Correct. controller temperature thermistor Is the remote connected properly?
  • Page 101 '10 • SCM-SM-094 Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: Cooling overload operation Outdoor – 2 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are normal sensor, refer to E37.

  • Page 102: E36 Discharge Pipe Temperature Error

    '10 • SCM-SM-094 Green Content Error code Indoor Keeps flashing Stays OFF Remote controller: Discharge pipe temperature error Outdoor – 5 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature, refer to E39.

  • Page 103: Outdoor Heat Exchanger Temperature Sensor Anomaly

    '10 • SCM-SM-094 Green Content Error code Outdoor heat exchanger Indoor Keeps flashing Stays OFF Remote controller: temperature sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector.

  • Page 104: Outdoor Air Temperature Sensor Anomaly

    '10 • SCM-SM-094 Green Content Error code Outdoor air temperature Indoor Keeps flashing Stays OFF Remote controller: sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the suction pipe Correct connector. temperature sensor connector connected properly? For the characteristics of suction pipe temperature sensor, see the following graph.

  • Page 105: Discharge Pipe Temperature Sensor Anomaly

    '10 • SCM-SM-094 Green Content Error code Discharge pipe Keeps flashing Stays OFF Indoor Remote controller: temperature sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2.

  • Page 106: Current Cut

    '10 • SCM-SM-094 Green Error code Content Keeps flashing Stays OFF Indoor Remote controller: Current cut (1/2) – 1 time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Power supply Check power supply. voltage OK? Are the 2.
  • Page 107 '10 • SCM-SM-094 Green Error code Content Keeps flashing Stays OFF Indoor Remote controller: Current cut (2/2) Outdoor – 1 time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Continue from previous page Is the checked result of power •...

  • Page 108: Communication Error

    '10 • SCM-SM-094 Green Error code Content Outdoor sub PCB Indoor Keeps flashing Stays OFF Remote controller: communication error Outdoor – 4 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connector connection between the outdoor Correct connector.
  • Page 109 '10 • SCM-SM-094 Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: Active filter voltage error Outdoor – 2 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Restore normal condition. Is the power supply normal? 2.

  • Page 110: E48 Outdoor Fan Motor Anomaly

    '10 • SCM-SM-094 Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: Outdoor fan motor anomaly Outdoor – Keeps flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material intervene Remove foreign matter. in rotational area of fan propeller? Does the 2.
  • Page 111 '10 • SCM-SM-094 Green Green Error code Content Error code Content Indoor Keeps flashing Stays OFF Remote controller: Remote controller: E51 Power transistor anomaly Power transistor error Keeps flashing Stays Off Indoor – 1 time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 112 '10 • SCM-SM-094 Green Content Error code Suction pipe temperature Indoor Keeps flashing Stays OFF Remote controller: sensor anomaly Outdoor – 8 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the suction pipe Correct connector. temperature sensor connector connected properly? For the characteristics of suction pipe temperature sensor, see the following graph.
  • Page 113 '10 • SCM-SM-094 Green Error code Content Insufficient refrigerant amount Indoor Keeps flashing Stays OFF Remote controller: or detection of service valve closure Outdoor – 2 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the service valve fully Open fully.
  • Page 114 '10 • SCM-SM-094 Green Green Error code Content Error code Content Current safe stop Indoor Keeps flashing Stays OFF Keeps flashing Stays Off Remote controller: Indoor Remote controller: E58 Current safe stop (Model SRC40 - 60) – 3 times flash Outdoor 3 time flash Outdoor...
  • Page 115 '10 • SCM-SM-094 Green Error code Content Indoor Keeps flashing Stays OFF Remote controller: Compressor startup failure Outdoor – 2 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Disconnect the outdoor fan motor Compressor does not start at all. connector and try to startup Neither noise nor vibration cannot be heard Does...
  • Page 116 '10 • SCM-SM-094 Green Content Error code Keeps flashing Stays OFF Indoor Remote controller: Compressor rotor lock error Outdoor – 7 times flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Check and correct the power supply voltage power supply voltage Reset the power supply and restart operation.

  • Page 117: Outdoor Units

    Indication lamp Color Function WIRING DIAGRAM Led e （1） Warning lamp Self diagnosis function by led e 1 Time ash Current cut FUSE 250V 15A 2 Time ash Trouble of outdoor unit 3 Time ash Over current POWER SUPPLY 4 Time ash Transmission error Y／G Y／G...
  • Page 118 Indication lamp Color Function WIRING DIAGRAM Led e Warning lamp Self diagnosis function by led e FUSE 1 Time flash Current cut 250V 15A 250V 20A 2 Time flash Trouble of outdoor unit 3 Time flash Over current POWER SUPPLY 4 Time flash Transmission error 5 Time flash...
  • Page 119 Indication lamp Color Function FUSE 250V 20A Led e Warning lamp Self diagnosis function by led e POWER SUPPLY 1 Time flash Current cut 2 Time flash Trouble of outdoor unit 3 Time flash Over current 4 Time flash Transmission error CNMAIN CNSUB UNIT A...
  • Page 120 Item Description CNE-CNY Connector Fan motor DISPLAY Flap motor WIRELESS RECEIVER CNX1 Louver motor BACK-UP SW Inlet motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Humidity sensor 50,60 only CNX2 Limit switch Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...

  • Page 121: Circuit Board

    Item Description CNE-CNY Connector Fan motor Flap motor Louver motor Humidity sensor Room temp. sensor Heat exch. sensor Diode stack Fuse PRINTED Terminal block CIRCUIT Varistor BOARD HEAT EXCHANGER Mark Color 250V 3.15A Black Blue White Yellow Yellow Green HEAT EXCHANGER DISPLAY WIRELESS...
  • Page 122 Item Description CNE-CNX2 Connector DISPLAY Fan motor WIRELESS RECEIVER Flap motor BACK-UP SW CNX1 Damper motor AIR SELECTION SW Damper arm motor PRINTED CIRCUIT Room temp. sensor BOARD Heat exch. sensor Humidity sensor CNX2 Diode stack Fuse Terminal block Varistor INTERFACE KIT SC-BIKN-E Color Marks...
  • Page 123 CONTROL INTERFACE KIT SC-BIKN-E 250V 0.16A 250V 3.15A PRINTED CIRCUIT BOARD 1 2/N Power source 1 phase 220 - 240 V 50Hz DISPLAY TO OUTDOOR UNIT WIRELESS TO OUTDOOR UNIT RECEIVER POWER WIRES Color Marks Meaning of Marks SIGNAL WIRE Mark Color Mark...

  • Page 124: Indoor Units

    Color Marks LED 3 Indication lamp Red-Inspection Terminal block Power source Mark Color CNB Z Connector Drain motor LM1 4 Louver motor mark BK Black F200 203 Fuse Remote controller communication Terminal block Signal line mark Blue address Fan motor Thermistor Remote controller BR Brown Float switch...
  • Page 125 Cooling cycle Outdoor unit Heating cycle Sensor Service valve (Th2) (Gas) Gas line (φ9.52) (φ9.52) Indoor unit 4 way valve Check joint Muffler Sensor (Th3) Discharge Heat exchanger Sensor Hamidity sensor (Th2 (Th3) Sensor (Th4) Suction Sensor Accumlator Accumlator (Th2 Capillary Compressor Sensor...
  • Page 126 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) Gas line ( 9.52 or 12.7) Sensor ( 9.52 or 12.7) (Th2) ( 9.52 or 12.7) Humidity 4way valve sensor (Th3) Indoor Unit Heat exchanger Sensor (Th2 Heat exchanger Sensor Muffler Sensor (Th2 (Th3)
  • Page 127 Cooling cycle Outdoor Unit Heating cycle Service valve (Gas) ( 9.52 or 12.7) Gas line Heat exchanger ( 9.52 or 12.7) Sensor (Th2) ( 9.52 or 12.7) 4way valve ( 9.52 or 12.7) Humidity sensor separator Capillary tube (Th3) Indoor Unit Sensor Sensor Sensor...

  • Page 128: Application Datas

    '10 • SCM-SM-094 5. APPLICATION DATAS RPC012A915 5.1 Installation of outdoor unit MULTI TYPE AIR CONDITIONER (1) Models SCM40ZJ-S, 45ZJ-S R410A REFRIGERANT USED • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page139 and 160. •...

  • Page 129: Selection Of Installation Location

    '10 • SCM-SM-094 CAUTION • Do not install the unit near the location where leakage and breakdowns. The system can also affect medical • Do not touch any buttons with wet hands. of combustible gases can occur. equipment and telecommunication equipment, and obstruct It can cause electric shocks.

  • Page 130: Connection Of Refrigerant Pipings

    '10 • SCM-SM-094 INSTALLATION OF OUTDOOR UNIT Drainage There are 2 holes in the bottom panel of the outdoor unit to drain condensation. Install the outdoor unit so it will be horizontal. Also, secure the legs of the unit to a firm foundation to prevent any instabilities. Secure it firmly so the unit will not fall during earthquakes and from sudden gusts of wind.

  • Page 131: Earthing Work

    '10 • SCM-SM-094 4 AIR PURGING NOTE : Fully open the operation valves (on both liquid and gas sides) after completing air purging. Since the system uses service ports differing in diameter from those found Please use an anti-reverse flow type vacuum pump adapter so as to prevent on the conventional models, a charge hose (for R22) presently in use is not vacuum pump oil from running back into the system.

  • Page 132: Models Scm50Zj-S,60Zj-S

    '10 • SCM-SM-094 (2) Models SCM50ZJ-S, 60ZJ-S page139 and 160.
  • Page 133 '10 • SCM-SM-094...
  • Page 134 '10 • SCM-SM-094...
  • Page 135 '10 • SCM-SM-094...

  • Page 136: Models Scm71Zj-S,80Zj-S

    '10 • SCM-SM-094 (3) Models SCM71ZJ-S, 80ZJ-S RPC012A913 RPC012A913 INSTALLATION MANUAL FOR OUTDOOR UNIT MULTI TYPE AIR CONDITIONER R410A REFRIGERANT USED page 139 and 160. • This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 54～75. •...
  • Page 137 '10 • SCM-SM-094 ITIONER T USED CAUTION • Do not install the unit near the location where leakage and breakdowns. The system can also affect medical • Do not touch any buttons with wet hands. of combustible gases can occur. equipment and telecommunication equipment, and obstruct It can cause electric shocks.

  • Page 138: Installation Of Outdoor Unit

    '10 • SCM-SM-094 INSTALLATION OF OUTDOOR UNIT 4 AI Drainage Sinc on t There are 3 holes in the bottom panel of the outdoor unit to drain condensation. appl Install the outdoor unit so it will be horizontal. Also, secure the legs of the unit to a firm foundation to prevent any instabilities. After Secure it firmly so the unit will not fall during earthquakes and from sudden gusts of wind.
  • Page 139 '10 • SCM-SM-094 4 AIR PURGING NOTE : Fully open the operation valves (on both liquid and gas sides) after completing air purging. Since the system uses service ports differing in diameter from those found Please use an anti-reverse flow type vacuum pump adapter so as to prevent on the conventional models, a charge hose (for R22) presently in use is not vacuum pump oil from running back into the system.

  • Page 140: Electrical Wirings

    Warming Potential (GWP)=1975. The forced operation by short-circuiting protective device of pressure (a) Models SRK20ZJX-S, 25ZJX-S, 35ZJX-S, 50ZJX-S, 60ZJX-S • Do not run the unit with removed panels or protections. switch and temperature controller or the use of non specified component Touching rotating equipments, hot surfaces or high voltage parts can cause can cause fire or burst.

  • Page 141: Installation Of Indoor Unit

    • Do not put the drainage pipe directly into drainage channels where • Do not processing, splice the power cord, or share a socket with the strong light beam (in case of the infrared specification unit). It can cause electric shocks. poisonous gases such as sulphide gas can occur.
  • Page 142 Vinyl tape Use an attached insulation pad for heat insulation. Position it so that the slit area faces upward.
  • Page 143 INSTALLATION OF REMOTE CONTROL SWITCH CAUTION Cover...
  • Page 144 (a) Models SRK20ZJ-S, 25ZJ-S, 35ZJ-S, 50ZJ-S RLA012A012 WARNING • Do not vent R410A into the atmosphere : R410A is a fluorinated • Do not perform any change of protective device itself or its setup greenhouse gas, covered by the Kyoto Protocol with Global condition.
  • Page 145 Poisonous gases will flow into the room through drainage pipe and This may cause fire or electric shock due to defecting contact, defecting set or radio receiver is placed within 1m). system is in operation. seriously affect the user’s health and safety. insulation and over-current etc.

  • Page 146: Electrical Wiring Work

    Fixing of indoor unit Since this air conditioner has been designed to collect dew drops on the rear Gutter surface to the drain pan, do not attach the power cord above the gutter. • How to remove the indoor unit from the installation board Latch (2 locations) Installation Steps Wall...
  • Page 147 Do remove the air filter. shown in right illustration and pull it toward you. Cover the body with the front panel. To install, insert the panel arm into the slot on the Fit the 3 latches in the upper section. front panel from the position shown in right Tighten the 2 set screws.

  • Page 148: Floor Standing Type (Srf)

    (2) Floor standing type (SRF) FLOOR TYPE AIR CONDITIONER RFB012A002A RFB012A002A WARNING R410A REFRIGERANT USED • Do not vent R410A into the atmosphere : R410A is a fluorinated • Do not perform any change of protective device itself or its setup INSTALLATION MANUAL FOR INDOOR UNIT greenhouse gas, covered by the Kyoto Protocol with Global condition.
  • Page 149 • Do not put the drainage pipe directly into drainage channels where • Do not processing, splice the power cord, or share a socket with the strong light beam (in case of the infrared specification unit). It can cause electric shocks. poisonous gases such as sulphide gas can occur.
  • Page 150 "...
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  • Page 152: Ceiling Concealed Type (Srr)

    (3) Ceiling concealed type (SRR) 127 and 138...

  • Page 156: Ceiling Cassette-4Way Compact Type (Fdtc)

    '10 • SCM-SM-094 (4) Ceiling cassette-4way compact type (FDTC)
  • Page 157 '10 • SCM-SM-094 Before installation Preparation before installation D781  Install correctly according to the installation manual.  If suspension bolt becomes longer, do reinforcement of earthquake resistant.  Confirm the following points:  For grid ceiling  Unit type/Power supply specification  Pipes/Wires/Small parts ...
  • Page 158 '10 • SCM-SM-094 Installation of indoor unit (continued) Drain pipe (continued) 6. Make sure to install the indoor unit horizontally. Confirm the Work procedure Drain test levelness of the indoor unit with a level gauge or transparent 1. Make sure to insert the drain hose (the end mode of soft PVC) to the end of the step part of drain ...
  • Page 159 '10 • SCM-SM-094 Drain pipe (continued) Panel installation Drain test  After wiring work finished, install the panel on the indoor unit.  Refer to attached panel installation manual for details. of drain  After installation of drain pipe, make sure that drain system work in good condition and no water leakage from joint and drain pan.
  • Page 160 '10 • SCM-SM-094 PJA012D783...
  • Page 161 '10 • SCM-SM-094 Note: This function is not able to be set with wireless remote controller or simple remote control(RCH - H3). For setting the swing range of other louvers, return to 1 and proceed same procedure respectively.
  • Page 162 Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 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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