Page 1 MICRO INVERTER PACKAGED AIR-CONDITIONERS (Split system, air to air heat pump type) CEILING CASSETTE-4 WAY TYPE CEILING CASSETTE-4 WAY COMPACT TYPE Single type Twin type Triple type Twin type Triple type FDT100VNAWVH FDT100VNAWPVH FDT140VNAWTVH FDTC100VNAWPVH FDTC140VNAWTVH 100VSAWVH 100VSAWPVH 140VSAWTVH 100VSAWPVH...
Page 2 '19 • PAC-SM-309 TABLE OF CONTENTS 1. MICRO INVERTER PACKAGED AIR-CONDITIONERS ........2. V MULTI SYSTEM ....................201...
Page 3 '19 • PAC-SM-309 1. MICRO INVERTER PACKAGED AIR-CONDITIONERS CONTENTS 1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ....1.1.1 Remote control ..................1.1.2 Operation control function by the wired remote control ....10 1.1.3 Operation control function by the indoor control ....... 13 (Ⅰ) FDT, FDTC, FDU, FDUM, FDE series ............
Page 4 '19 • PAC-SM-309 (34) Auto fan speed control (RC-EX3A only) ............ 29 (35) Indoor unit overload alarm (RC-EX3A only) ..........29 (36) Peak-cut timer (RC-EX3A only) ..............29 (37) Motion sensor control (RC-EX3A only)............30 (Ⅱ) SRK Seris ....................32 (1) Unit ON/OFF button ..................
Page 5 '19 • PAC-SM-309 1.3 DISASSEMBLY PROCEDURE ..............174 (1) Indoor unit ....................174 (2) Outdoor unit....................186 1.4 ELECTRICAL WIRING ...................188 (1) Indoor unit ....................188 (2) Outdoor unit....................197 1.5 PIPING SYSTEM ....................199...
Page 6 '16 • PAC-T-251 '19 • PAC-SM-309 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1.1 Remote control (Option parts) 1.10.1 Remote control (1) Wired remote control Wired remote control Model RC-EX3A Model RC-EX3A ⑤ LCD (with backlight) ③...
Page 7 '19 • PAC-SM-309 Wired remote control Model RC-E5 The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation Characters displayed with dots in the liquid crystal display area are abbreviated.
Page 8 '19 • PAC-SM-309 '16 • PAC-T-251 '16 • PAC-T-251 Wireless remote control Wireless remote control (2) Wireless remote control RCN-E2 ( Except SRK series ) Indication section Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature.
Page 9 '19 • PAC-SM-309 SRK series only Transmission section OPERATION MODE select button ON/OFF (luminous) button Each time the button is pressed, the Press to start operation, press again mode changes. to stop. TEMPERATURE button FAN SPEED button This button sets the room temperature. Each time the button is pressed, the fan speed changes.
Page 10 direction. AIR FLOW (LEFT/RIGHT) button 3D AUTO button This button changes the air flow (left/right) direction. This button sets 3D AUTO operation. '19 • PAC-SM-309 SILENT button NIGHT SETBACK button This buttion changes the SILENT operation. This button sets NIGHT SETBACK operation.
Page 11 '16 • PAC-T-251 '19 • PAC-SM-309 1.1.2 Operation control function by the wired remote control 1.10.2 Operation control function by the wired remote control ●Model RC-EX3A (1) Switching sequence of the operation mode switches of remote control (a) Tap the change operation mode button on the TOP screen. (b) When the change operation mode screen is displayed, tap the button of desired mode.
Page 12 '19 • PAC-SM-309 ●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 13 '19 • PAC-SM-309 ● Model RC-E5 (1)　Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (2)　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. (3)　Power failure compensation function (Electric power source failure) •...
Page 14 '19 • PAC-SM-309 1.1.3 Operation control function by the indoor control (Ⅰ) FDT, FDTC, FDU, FDUM, FDE series (1) Auto operation (a) If “Auto” mode is selected by the remote control, the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature.
Page 15 '19 • PAC-SM-309 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating".
Page 16 '19 • PAC-SM-309 (b) FDU, FDUM, FDE series Return air temperature sensor [Thi-A (by the remote control when the remote control sensor is enabled)] controls the indoor temperature environment simultaneously. (i) Operation is started in the cooling mode. When the difference between the return air temperature and the setting temperature is 2°C or less, the indoor unit fan tap is brought down by one tap.
Page 17 '19 • PAC-SM-309 (v) Timer operations which can be set in combination Item Timer OFF timer ON timer Weekly timer Item Timer Í Í OFF timer Í Í ON timer Í Weekly timer Í Í Í Notes (1) : Allowed Í: Not (2) Since the ON timer, sleep timer and OFF timer are set in parallel, when the times to turn ON and OFF the air-conditioner are duplicated, the setting of the OFF timer has priority.
Page 18 '19 • PAC-SM-309 (6) Hot keep Hot keep control is performed at the start of the defrost operation. (a) Control (i) When the indoor heat exchanger temperature (detected with Thi-R1 or R2) drops to less than 35°C, the speed of indoor fan follows fan setting at the time of thermostat OFF.
Page 19 '19 • PAC-SM-309 (8) Thermostat operation (a) Cooling (i) Thermostat is operated with the room temperature control. (ii) Thermostat is turned ON or OFF relative to the set room temperature as shown below. Thermostat ON Temperature drop Thermostat OFF Temperature rise Set room temperature (iii) Thermostat is turned ON when the room temperature is in the range of -1 <...
Page 20 '19 • PAC-SM-309 (d) Fan control during cooling thermostat OFF (i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired remote control. ① Low fanspeed, ② Set fan speed (Factory default), ③ Intermittence, ④ Fan OFF (ii) When the “Low fan speed”...
Page 21 '19 • PAC-SM-309 (11) Drain pump control (a) This control is operated when the inverter frequency is other than 0 Hz during the cooling operation and automatic cooling and dehumidifying operations. (b) Drain pump ON condition continues for 5 minutes even when it enters the OFF range according to (i) above after turning the drain pump ON, and then stops.
Page 22 '19 • PAC-SM-309 (c) Operation check mode There is no communication with the outdoor unit but it allows performing operation in respective modes by operating the remote control. (d) Drain pump test run mode As the drain pump test run is established, the drain pump only operates and during the operation protective functions by the microcomputer of indoor unit become ineffective.
Page 23 '19 • PAC-SM-309 (17) Plural unit control – Control of 16 units group by one remote control (a) Function One remote control can control a group of multiple number of unit (Max. 16 indoor units). “Operation mode” which is set by the remote control can operate or stop all units in the group one after another in the order of unit. No. Thermostat and protective function of each unit function independently.
Page 24 '19 • PAC-SM-309 (19) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (a) Broken wire detection When the return air temperature sensor detects -55°C or lower or the heat exchanger temperature sensor detect -55°C or lower for 5 seconds continuously, the compressor stops. After a 3-minute delay, the compressor restarts but, if it is detected again within 60 minutes after the initial detection for 6 minutes continuously, stops again (the return air temperature sensor: E7, the heat exchanger temperature sensor: E6).
Page 25 '19 • PAC-SM-309 (b) Input for external control The external input for the indoor unit can be selected from the following input. Input name Content 1 Run/Stop Refer to [(20) (c) Remote operation input] 2 Premission/Prohibition Refer to [(21) Operation permission/prohibition] 3 Cooling/Heating Refer to [(23) Selection of cooling/heating external input function] 4 Emergency stop...
Page 26 '19 • PAC-SM-309 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 CnT-6 or directly connected remote control remote control to the remote CnTA to the remote control system can be system can be...
Page 27 '19 • PAC-SM-309 (a) In case of CnT ① Operation stop level > CnTA ③ Operation permission/prohibition level Operation Operation Operation Stop Stop Stop Level input Operation permission CnTA Operation prohibition Operation permission/ prohibition setting Operation Operation( ) Operation Stop Stop Stop Actual operation...
Page 28 '19 • PAC-SM-309 (22) Temporary stop input In case of temporary stop, operation lamp of remote control lights, but indoor/outdoor unit stop the operation. (a) In case of “level input” setting (Factory default) Input signal to CnT-6 or CnTA is OFF → ON : Temporary stop Input signal to CnT-6 or CnTA is OFF → ON : Normal operation CnT-6 or CnTA input Actual operation Temporary stop Temporary stop Remote control...
Page 29 '19 • PAC-SM-309 (24) Fan control at heating startup (a) Starting conditions At the start of heating operation, if the difference of setting temperature and return air temperature is 5°C or higher after the end of hot start control, this control is performed. (b) Contents of control (i) Sampling is made at each minute and, when the indoor heat exchanger temperature (detected with Thi-R) is 37°C or higher, present number of revolutions of indoor fan speed is increased by 10min...
Page 30 '19 • PAC-SM-309 (32) Fan circulator operation (RC-EX3A only) When the fan is used for circulation, the unit is operated as follows depending on the setting with the remote control. (a) If the invalid is selected with the remote control, the fan is operated continuously during the fan operation. (normal fan mode) (b) If the valid is selected with the remote control, the fan is operated or stopped when on the difference of the remote control temperature sensor and the return air temperature sensor becomes bigger than 3°C.
Page 31 '19 • PAC-SM-309 (37) Motion sensor control (RC-EX3A and RCN-E2 only) The sensor determines the presence of people and the amount of activity, and the following controls are done by the motion sensor. Following settings are necessary to activate motion sensor control. (a) Infrared (motion) sensor setting: Installation setting of remote control RC-EX3A The indoor unit which is set to “Enable”...
Page 32 '19 • PAC-SM-309 (i) Power saving / comfort control The set temperature is adjusted according to the presence of people and their amount of activity detected by the infrared (motion) sensor. MODE:AUTO/COOL/HEAT mode operation Heat Source & Activity High None Normal When the extent of human 33ºC...
Page 33 '19 • PAC-SM-309 '09•SRK-DB-087D (Ⅱ) SRK series (1) Unit ON/OFF button '09•SRK-DB-087D (a) Operation (b) Details of operation room (1) Unit ON/OFF button whether to go into the COOL, DRY or HEAT modes. (i) SRK-ZSX series Function Room temperature (a) Operation Fan speed Flap/Louver Timer switch setting Operation mode...
Page 34 '19 • PAC-SM-309 Auto swing control Note Even if ［ Auto Swing ］ is selected, the louver position with anti draft function is fixed to position 1. (a) RC-EX3A Louver control To operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control. The wind direction select screen will be displayed. To swing the louver, touch the “Auto swing” button. The lover will move up and down. To fix the swing louver at a position, touch one of [1] - [4] buttons.
Page 35 '19 • PAC-SM-309 Timer operation (a) RC-EX3A (i) Sleep timer Set the time from the start to stop of operation. The time can be selected in the range from 30 to 240 minutes (in the unit of 10-minute). Note (1) Enable the “Sleep timer” setting from the remote control. If the setting is enabled, the timer operates at every time. (ii) Set OFF timer by hour Set the time to stop the unit after operation, in the range from 1 to 12 hours (in the unit of hour).
Page 36 '19 • PAC-SM-309 Outline of heating or cooling operation Operation of major functional components in heating mode Heating Thermostat ON Thermostat OFF Failure Compressor Indoor fan ON(HOT KEEP) Outdoor fan (few minutes ON) 4-way valve (3 minutes ON) (b) Operation of major functional components in cooling mode Cooling Thermostat ON Thermostat OFF...
Page 37 '19 • PAC-SM-309 Outdoor unit Signal wiring between outdoor unit Refrigerant piping and indoor units Indoor unit (Master unit) (Slave unit 1) (Slave unit 2) Connection cable Interfase kit (Master) (Slave 1) (Slave 2) * 1:In case of SRK single use. Remote control wiring * 2:In case of SRK triple use.
Page 38 '19 • PAC-SM-309 (ii) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied following conditions. If the setting temperature is changed with the remote control, the operation mode is judged immediately. Cooling Keep operation mode SP: Setting temperature Heating...
Page 39 '09•SRK-DB-087D '19 • PAC-SM-309 (11) Frost prevention control (a) SRK-ZSX series (i) Operating conditions compressor speed (ii) Detail of anti-frost operation Lower Indoor heat exchanger limit temperature 5°C or lower 2.5°C or lower speed Item 25 rps Lower limit of compressor command speed 0 rps Keep the fan speed before Indoor fan...
Page 40 '19 • PAC-SM-309 (ii) Contents of operation Air capacity control Model SRK50, 60ZSX-W Item Upper limit of compressor's speed RangeA: 30 rps, RangeB: 24 rps Indoor fan 4th speed Upper limit of compressor's speed RangeA: 40 rps, RangeB: 24 rps Auto, Lo Indoor fan Adaptable to compressor speed...
Page 41 '19 • PAC-SM-309 (ii) Contents of operation Air capacity control Model SRK71, 100ZR-W Item Upper limit of compressor’s command speed Range A: As per following table, Range B: 40 rps Note (1) Ranges A and B are as shown below. ●...
Page 42 '19 • PAC-SM-309 1.1.4 Operation control function by the outdoor control Determination of compressor speed (Frequency) Required frequency Cooling/dehumidifying operation Unit: rps Model Usual operation Max. required SW7-3 OFF frequency Silent mode, outdoor temperature ≦15°C SW7-3 ON Min. required frequency (b) Heating operation Unit: rps Model...
Page 43 '19 • PAC-SM-309 Compressor soft start control (a) Compressor protection start I [Control condition] Normally, the compressor operation frequency is raised in this start pattern. [Control contents] a) Starts with the compressor’s target frequency at A rps. However, when the ambient air temperature (Tho-A) is 35°C or higher during cooling/ dehumidifying or the indoor return air temperature (Thi-A) is 25°C or higher during heating, it starts at C rps.
Page 44 '19 • PAC-SM-309 Outdoor fan control (a) Outdoor fan tap and fan motor speed Unit: min Model Mode Fan motor tap ➀ speed ➁ speed ➂ speed ➃ speed ➄ speed ➅ speed ➆ speed 100-140 Cooling/Dehumidifying Heating Note (1) If the “silent mode start” signal is received from the remote control and SW7-3 is ON, the speed changes from 600 to 500. (b) Fan tap control during Cooling/Defumidifying operation Fan taps are selected depending on the outdoor unit heat exchanger temperature (Tho-R1, R2) and the outdoor air temperature (Tho-A).
Page 45 '19 • PAC-SM-309 (ii) The outdoor unit heat exchanger temperature is detected always and, when the number of revolutions of the outdoor fan speed has been increased or decreased, there is no change of fan speed for 20 seconds. (iii) Rage of the outdoor fan speed under this control is as follows. a) Lower limit: 130min b) Upper limit: 350min (iv) As any of the following conditions is established, this control terminates.
Page 46 '19 • PAC-SM-309 (c) Switching of defrost operation with SW3-1 (i) If SW3-1 on the outdoor unit control PCB is turned to ON, it becomes easier to enter the defrost operation. Use this when installing a unit at snowing regions. (ii) Control contents It allows entering the defrost operation under the defrost condition A when the cumulative heating operation time becomes 30 minutes.
Page 47 '19 • PAC-SM-309 (ii) Anomalous stop control Operation control function by the indoor unit control - See the heating overload protection, page 21. (iii) Adaptation to existing piping, stop control If the existing piping adaptation switch, SW5-1, is turned ON, the compressor stops to protect existing piping when the indoor unit heat exchanger temperature (Thi-R) exceeds the setting value.
Page 48 '19 • PAC-SM-309 (g) Power transistor protection from voltage drop Anomalous stop control If the power transistor drops supply voltage, the protective switch in the power transistor operates to protect the compressor and the power transistor. Under any of the following condition, E41 is displayed and it enters the anomalous stop mode. i) When the protective switch in the power transistor operates 5 times within 60 minutes and the compressor stops.
Page 49 '19 • PAC-SM-309 (m) Broken wire detection on temperature sensor (i) Outdoor unit heat exchanger temperature sensor, outdoor air temperature sensor and low pressure sensor If the following is detected for 5 second continuously within 2 minutes to 2 minutes and 20 seconds after the compressor ON, the compressor stops.
Page 50 '19 • PAC-SM-309 Pump-down control When SW7-1 is OFF, turning ON the pump-down switch SW1 for 2 seconds during the operation stop or anomalous stop (excluding the thermostat OFF), the pump-down operation is performed. (This is invalid when the indoor unit is operating. This is effective even when the indoor unit is stopped by the anomalous stop or the power source is turned OFF.) (a) Control contents Close the service valve at the liquid side.
Page 51 '19 • PAC-SM-309 1.2 MAINTENANCE DATA 1.2.1 Diagnosing of microcomputer circuit (1) 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 control error code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
Page 52 '19 • PAC-SM-309 Remote control Indoor unit control PCB Outdoor unit control PCB Location of Reference Description of trouble Repair method Green Green trouble page Error code Red LED Red LED Red LED LED (1) LED (1) Fan motor • Indoor fan motor rotation speed anomaly Replacement, repair 1(2)-time Keeps...
Page 53 '19 • PAC-SM-309 (ii) Outdoor unit 1) FDT, FDTC, FDU, FDUM, FDE series FDC100-140VNA, 100-140VSA Remote control Indoor unit control PCB Outdoor unit control PCB Reference Location of trouble Description of trouble Repair method Green Green page Error code Red LED Red LED Red LED LED (1) LED (1)
Page 54 '19 • PAC-SM-309 2) SRK series 2) SRK series Remote control Indoor unit display Outdoor unit control PCB Reference Location of trouble Description of trouble Repair method page TIMER Error code Red LED RUN light Red LED Green LED light Installation or operating •...
Page 55 '19 • PAC-SM-309 (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 •...
Page 56 '19 • PAC-SM-309 ■ Error log and reset Error indicator Memorized error log Reset Remote control display • Higher priority error is memorized. • Stop the unit by pressing the ON/OFF switch of remote control. Red LED on indoor unit control PCB •...
Page 57 '19 • PAC-SM-309 1) Model FDT series a) Replace the control PCB a) Replace the control PCB i) Unscrew terminal (Arrow A) of the "E1" wiring (yellow/green) that is connected to PCB. i) Unscrew terminal (Arrow A) of the "E1" wiring (yellow/green) that is connected to PCB. ii) Replace the PCB only after all the wirings connected to the connector are removed.
Page 58 '19 • PAC-SM-309 2) Model FDTC series PSC012D050 Replace and set up the PCB according to this instruction. i) 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...
Page 59 '19 • PAC-SM-309 3) Models FDU, FDUM, FDE series PSB012D990 a) Control PCB PSB012D990B Replace and set up the PCB according to this instruction. i) Set to an appropriate address and function using switch on PCB. 　 Select the same setting with the removed PCB. item switch Content of control...
Page 60 '19 • PAC-SM-309 This PCB is a general PCB. Replace the PCB according to this instruction. b) Power PCB i)Replace the PCB This PCB is a general PCB. Replace the PCB according to this instruction. i) Replace the PCB � Unscrew terminal(Arrow A) of the "E2" wiring(yellow/green) that is connected to PCB. �...
Page 61 ③ Fix the board such that it will not pinch any of the wires. ④ Reconnect the wirings to the PCB. Wiring connector color should match with the color of connector of the PCB. ⑤ Screw back the terminal of wiring, that was removed in ①. ii) Power PCB '19 •...
Page 62 '19 • PAC-SM-309 ●DIP switch setting list Switch Description Default setting Remark Address No. setting at plural indoor units control by 1 R/C SW5-1 Master * /Slave Master/Slave setting See table 2. SW5-2 SW6-1 SW6-2 Model selection As per model See table 1.
Page 63 '19 • PAC-SM-309 (a) Cautions (b) SRK series 1) If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. (i) Cautions When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. 1) If you are disassembling and checking an air- conditioner, be sure to turn off the power before beginning.
Page 64 '09•SRK-DB-087D '19 • PAC-SM-309 (iv) Inspection procedures corresponding to detail of trouble Sensor error Broken sensor wire, connector poor connection Sensor temperature characteristics (Room temperature, indoor heat exchanger temperature) - 10 Temperature (˚C) Indoor fan motor error Defective fan motor, connector poor connection, defective indoor unit PCB unit unit...
Page 65 '19 • PAC-SM-309 Error of signal transmission Wiring error including power cable, defective indoor/ outdoor unit PCB ② ③ unit ② ③ unit ① ② unit...
Page 66 '19 • PAC-SM-309 (v) Phenomenon observed after shor-tcircuit, wire breakage on sensor Phenomenon Operation Sensor mode Shortcircuit Disconnected wire Cooling Room temperature sensor Heating Freezing cycle system protection trips and stops the compressor. Cooling Heat exchanger temperature sensor Heating Cooling Humidity sensor Heating '09•SRK-DB-087D...
Page 67 Replace indoor unit PCB. blocks ② and ③ oscillating between DC 0 and 20V? '19 • PAC-SM-309 Indoor electrical components are normal. 2) Indoor fan motor check procedure a) Indoor unit PCB output check iii) ① ④ ⑤ DC several V (–) DC 308-336V (4-6 V)
Page 68 '19 • PAC-SM-309 Troubleshooting at the outdoor unit When troubleshooting the outdoor unit, firstly assess the overview of malfunction and try to presume the cause and the faulty part by checking the error code dispalyed on the remote control and flashing pattern of indicator lamps (Red LED and Green LED), and then proceed further inspection and remedy it. Self-diagnosis system by microcomputer on indoor unit and outdoor unit PCB can assist to find the cause of malfunction smoothly by making a diagnosis of not only the anomaly of microcomuter, but also the anomaly in power source system, installation space, overload resulting from improper charging amount of refrigerant and etc.
Page 69 '19 • PAC-SM-309 (i) Models FDC100VNA-W, 125VNA-W, 140VNA-W PCA012D083 1) Disassembly a) After the breaker is shut down, remove the service panel, top panel and rear panel. (Refer to Fig.1). b) Don't touch the main PCB until three minutes have passed after the breaker is shut doun. (After having shut down the breaker, some capacitor is held by high voltage.
Page 70 '19 • PAC-SM-309 LED2(Red) LED1(Green)
Page 71 '19 • PAC-SM-309 2) Exchange a) Match the setting of new main PCB switches (JSW1, SW3-7) with former main PCB. (Refer to Fig.4) b) Tum over the separator of new heat conduction sheet and paste the heat conduction sheet on the aluminum block.
Page 72 '19 • PAC-SM-309...
Page 73 '19 • PAC-SM-309 (ii) Models FDC100VSA-W, 125VSA-W, 140VSA-W PCA012D084 1) Disassembly a) After the breaker is shut down, remove the service panel, top panel and rear panel. (Refer to Fig.1). b) Don't touch the main PCB until three minutes have passed after the breaker is shut doun. (After having shut down the breaker, some capacitor is held by high voltage.
Page 74 '19 • PAC-SM-309 LED2(Red) LED1(Green)
Page 75 '19 • PAC-SM-309 2) Exchange a) Match the setting of new main PCB switches (JSW1, SW3-7) with former main PCB. (Refer to Fig.4) b) Tum over the separator of new heat conduction sheet and paste the heat conduction sheet on the aluminum block. (Refer to Fig.5) 3) Installation a) Install the new main PCB on the control and tighten the screw as shown in Fig.6.
Page 76 '19 • PAC-SM-309...
Page 77 '19 • PAC-SM-309 ● DIP switch setting list (Outdoor unit)
Page 78 '19 • PAC-SM-309 (5) Check of anomalous operation data with the remote control (a) In case of RC-EX3A remote control [Operating procedure] ➀ On the TOP screen, touch the buttons in the order of “Menu” ➝ “Service setting” ➝ “Service & Maintenance” ➝ “Service password”...
Page 79 '19 • PAC-SM-309 (b) In case of RC-E5 remote control Number Data Item Operation data can be checked with remote control unit operation. (Operation Mode) (Set Temperature) ➀ Press the button. (Return Air Temperature) The display change “ ” (Remote Control Temperature Sensor) ➁...
Page 80 '19 • PAC-SM-309 (6) Inverter checker for diagnosis of inverter output 　●Checking method (a) Setup procedure of checker. 1) Power OFF (Turn off the breaker). 2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. 3) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
Page 81 '19 • PAC-SM-309 (7) Outdoor unit control failure diagnosis circuit diagram...
Page 82 '19 • PAC-SM-309...
Page 83 '19 • PAC-SM-309 1.2.2 Troubleshooting flow (1) List of troubles (a) FDT, FDTC, FDU, FDUM, FDE series Remote control 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...
Page 84 '19 • PAC-SM-309 (b) SRK series Remote control 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 Louver motor failure...
Page 85 '19 • PAC-SM-309 (2) Troubleshooting (a) FDT, FDTC, FDU, FDUM, FDE series Green Content Error code Keeps flashing Stays OFF Indoor None Remote control: Operates but does not cool Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation.
Page 86 '19 • PAC-SM-309 Green Content Error code Keeps flashing Stays OFF Indoor None Operates but does not heat Remote control: Keeps flashing 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 87 '19 • PAC-SM-309 Green Content Error code Stays OFF Stays OFF Indoor None Earth leakage breaker activated Remote control: Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and resistance Replace compressor.
Page 88 '19 • PAC-SM-309 Green Content Error code – – Indoor None Excessive noise/vibration (1/3) Remote control: – – 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 considered that the air- after stopping operation...
Page 89 '19 • PAC-SM-309 Green Content Error code – – Indoor None Excessive noise/vibration (2/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes avoid contact with the contacting the casing.
Page 90 '19 • PAC-SM-309 Green Content Error code – – Indoor None Excessive noise/vibration (3/3) Remote control: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ Adjustment heating problem happens during commissioning due to anomalous operating Does noise/vibration occur when the conditions at cooling/ cooling/heating operation is in...
Page 91 '19 • PAC-SM-309 Green Content Error code Louver motor failure Keeps flashing Stays OFF Indoor None Remote control: (FDT, FDTC, FDE series) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure L Check at the indoor unit side. Operate after waiting for more than 1 minute.
Page 92 '19 • PAC-SM-309 Green Error code Content Power source system error Indoor Stays OFF Stays OFF Remote control: None (Power source to indoor unit control PCB) Outdoor Stays OFF 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between 1 and 2 on the terminal block...
Page 93 '19 • PAC-SM-309 Green Content Error code Power source system error Keeps flashing Stays OFF Indoor None Remote control: (Power source to remote control) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of the Correct.
Page 94 '19 • PAC-SM-309 Green Content Error code INSPECT I/U Keeps flashing Stays OFF Indoor INSPECT I/U Remote control: (When 1 or 2 remote controls are connected) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote control connected? ⑴，...
Page 95 '19 • PAC-SM-309 Green Content Error code INSPECT I/U Keeps flashing Stays OFF Indoor INSPECT I/U Remote control: (Connection of 3 units or more remote controls) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less.
Page 96 '19 • PAC-SM-309 Green Content Communication error at Error code Keeps flashing Stays OFF Indoor Remote control: WAIT initial operation (1/3) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure “ ” is still displayed on the WA IT remote control LED 2 minutes after power ON.
Page 97 '19 • PAC-SM-309 Green Content Communication error at Error code Keeps flashing Stays OFF Indoor Remote control: WAIT initial operation (2/3) Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Diagnosis for when the outdoor unit main PCB LED is turned off Shut down the breaker and back on again the breaker 3 minutes later.
Page 98 '19 • PAC-SM-309 Green Communication error at Content Error code Keeps flashing Stays OFF Indoor Remote control: initial operation (3/3) WAIT Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Method to check for outdoor unit main PCB before replacement of blown power source fuse.
Page 99 '19 • PAC-SM-309 Green Content Error code No display Stays OFF Stays OFF Indoor None Remote control: Stays OFF Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Remote control does not display anything after the power on. Is DC10V or Defective remote control higher detected at remote control connection...
Page 100 '19 • PAC-SM-309 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: communication circuit error Keeps flashing 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 environment.
Page 101 '19 • PAC-SM-309 Green Content Error code Keeps flashing 2-time flash Indoor Communication error during operation Remote control: Keeps flashing See below Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure In case that the outdoor unit red LED flashes 2-time Note (1) Inspect faulty connections (disconnection, looseness) on the outdoor unit terminal block.
Page 102 '19 • PAC-SM-309 Green Content Error code Indoor heat exchanger Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct. ➞ Insert connector exchanger temperature sensor securely.
Page 103 '19 • PAC-SM-309 Green Content Error code Return air temperature Keeps flashing 1-time flash Indoor Remote control: sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. ➞ Connect air temperature sensor connector.
Page 104 '19 • PAC-SM-309 Green Content Error code Keeps flashing 1-time flash Indoor Heating overload operation Remote control: Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the air filter clogged? Wash. 2. Error detection method Is the indoor heat exchanger Defective indoor heat...
Page 105 '19 • PAC-SM-309 Green Content Error code Drain trouble Keeps flashing 1-time flash Indoor Remote control: (FDT , FDTC , FDU , FDUM series) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDT , FDTC , FDU , FDUM Diagnosis Countermeasure sevies only...
Page 106 '19 • PAC-SM-309 Excessive number of connected Green Content Error code indoor units (more than 17 units) Keeps flashing Stays OFF Indoor Remote control: by controlling with one remoto control Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 107 '19 • PAC-SM-309 Green Content Error code Address setting error of Keeps flashing Keeps flashing Indoor Remote control: indoor units Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs Is “Master IU address set” function of remote 2.
Page 108 '19 • PAC-SM-309 Green Content Error code Communication error Keeps flashing 3-time flash Indoor Remote control: between master and slave indoor units Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it OK the unit Correct unit address setting.
Page 109 '19 • PAC-SM-309 Green Content Error code Indoor fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor 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 110 '19 • PAC-SM-309 Green Content Error code Address setting error of Keeps flashing 1-time flash Indoor Remote control: master and slave indoor units Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E18 occurs Is “Master IU address set”...
Page 111 '19 • PAC-SM-309 Green Content Error code Indoor unit operation check, Keeps flashing 1-time flash Indoor Remote control: drain pump motor check setting error Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Defective indoor unit Is SW7-1...
Page 112 '19 • PAC-SM-309 Green Content Indoor fan motor rotation Error code Keeps flashing 1-time flash Indoor Remote control: speed anomaly Keeps flashing Stays OFF Outdoor 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...
Page 113 '19 • PAC-SM-309 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the remote Correct. control temperature sensor connected properly? 2.
Page 114 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF Cooling overload operation control PCB Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are the sensor, refer to E37.
Page 115 '19 • PAC-SM-309 Green Error code Content Discharge pipe Remote control: Indoor unit Keeps flashing Stays OFF control PCB temperature error Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature sensor, refer to E39.
Page 116 '19 • PAC-SM-309 Outdoor heat Green Error code Content Remote control: exchanger temperature Indoor unit Keeps flashing Stays OFF control PCB sensor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature...
Page 117 '19 • PAC-SM-309 Green Error code Content Outdoor air temperature Remote control: Indoor unit Keeps flashing Stays OFF control PCB sensor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the outdoor air Correct connector.
Page 118 '19 • PAC-SM-309 Green Error code Content Remote control: Discharge pipe temperature Indoor unit Keeps flashing Stays OFF control PCB sensor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the discharge pipe temperature sensor Correct connector.
Page 119 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit High pressure error Keeps flashing Stays OFF control PCB (63H1 activated) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If the power source breaker is turned OFF and ON too quickly, E40 may be displayed.
Page 120 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Current cut (1/2) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the power source Check power source.
Page 121 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor Keeps flashing Stays OFF Current cut (2/2) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power Defective outdoor unit transistor module main PCB ➞...
Page 122 '19 • PAC-SM-309 Green Content Error code PCB A/F module anomaly Remote control: Indoor unit Keeps flashing Stays OFF control PCB (Models FDC100-140VNA-W only) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure Models FDC Is the power s ource...
Page 123 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF Outdoor fan motor anomaly control PCB Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign Remove foreign material.
Page 124 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Low pressure error (1/2) Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the low Correct.
Page 125 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF Low pressure error (2/2) control PCB Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page 2.
Page 126 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Inverter and fan motor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • Models FDC100-140VNA-W/VSA-W Replace immediately the main PCB.
Page 127 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Suction pipe Keeps flashing Stays OFF control PCB temperature sensor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection Correct connection of of suction pipe temperature sensor suction pipe temperature...
Page 128 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Low pressure sensor anomaly Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Are the connection of low pressure Correct low pressure sensor sensor connectors (at sensor side...
Page 129 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Insufficient refrigerant amount Keeps flashing Stays OFF control PCB or detection of service valve closure Outdoor unit Keeps flashing 1-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the...
Page 130 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Compressor startup failure (1/2) Outdoor unit Keeps flashing 5-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure In case that the compressor does not start at all and no sound or vibration exists Check the power source...
Page 131 '19 • PAC-SM-309 Green Error code Content Remote control: Indoor unit Keeps flashing Stays OFF control PCB Compressor startup failure (2/2) Outdoor unit Keeps flashing 5-time flash control PCB 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the (Outdoor unit main PCB anomaly) Replace outdoor unit main...
Page 132 '19 • PAC-SM-309 (b) SRK series RUN light TIMER light Indoor Content Error code display – – Operates but does not cool None Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 133 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Operates but does not heat None Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor unit fan operation.
Page 134 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Earth leakage breaker activated None Remote control: Green LED Red LED Outdoor unit control PCB Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the...
Page 135 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Excessive noise/vibration (1/3) None Remote control: Green LED Red LED Outdoor unit control PCB – – 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient Does time has elapsed after...
Page 136 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Excessive noise/vibration (2/3) None Remote control: Green LED Red LED Outdoor unit control PCB – – 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Rearrange the piping to Are the pipes...
Page 137 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Excessive noise/vibration (3/3) None Remote control: Green LED Red LED Outdoor unit control PCB – – 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page If insufficient cooling/ Adjustment...
Page 138 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Louver motor failure None Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure L Check at the indoor unit side.
Page 139 '19 • PAC-SM-309 RUN light TIMER light Indoor Power source system error Content Error code display – – None Remote control: (Power source to indoor unit control PCB) Green LED Red LED Outdoor unit control PCB Stays OFF 2-time flash 5.
Page 140 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code Power source system error display – – None (Power source to remote control) Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1.
Page 141 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display Stays OFF Keeps flashing Limit switch anomaly None Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the inlet...
Page 142 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – INSPECT I/U INSPECT I/U Remote control: Green LED Red LED Outdoor unit (When 1 or 2 remote controls are connected) control PCB Keeps flashing 2-time flash 5.
Page 143 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – INSPECT I/U INSPECT I/U Remote control: Green LED Red LED Outdoor unit (Connection of 3 units or more remote control) control PCB Keeps flashing 2-time flash 5.
Page 144 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Communication error at Remote control: WAIT Green LED Red LED Outdoor unit initial operation (1/3) control PCB Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 145 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Communication error at Remote control: WAIT Green LED Red LED Outdoor unit initial operation (2/3) control PCB Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 146 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Communication error at Remote control: WAIT Green LED Red LED Outdoor unit initial operation (3/3) control PCB Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 147 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – No display None Remote control: Green LED Red LED Outdoor unit control PCB Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Remote control does not display anything after the power on.
Page 148 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display – – Remote control Remote control: Green LED Red LED Outdoor unit communication circuit error control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise...
Page 149 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display 6-time flash Communication error during operation Remote control: Green LED Red LED Outdoor unit control PCB Keeps flashing See below 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure In case that the outdoor unit red LED flashes 2-times Note (1) Inspect faulty connections (disconnection,...
Page 150 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code Indoor heat exchanger display 1(3)-time flash Remote control: Green LED Red LED temperature sensor anomaly Outdoor unit control PCB Keeps flashing Stays OFF Note(1) Value in ( ) are the Th2 5.
Page 151 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code Room temperature display 2-time flash None Remote control: Green LED Red LED sensor anomaly Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the...
Page 152 '19 • PAC-SM-309 RUN light TIMER light Excessive number of connected Indoor Content Error code display – – indoor units (more than 17 units) Remote control: Green LED Red LED Outdoor unit by controlling with one remote control control PCB Keeps flashing Stays OFF 5.
Page 153 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display Address setting error of – – Remote control: Green LED Red LED Outdoor unit indoor units control PCB Keeps flashing stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs...
Page 154 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display Communication error – – Remote control: Green LED Red LED Outdoor unit between master and slave indoor units control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 155 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code display 6-time flash Remote control: Indoor fan motor anomaly Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material...
Page 156 '19 • PAC-SM-309 RUN light TIMER light Indoor Content Error code Remote control display – – Remote control: temperature sensor anomaly Green LED Red LED Outdoor unit control PCB Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the remote...
Page 157 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Keeps flashing Remote control: Cooling overload operation Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are the...
Page 158 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Keeps flashing Remote control: Discharge pipe Green LED Red LED Outdoor unit temperature error control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge pipe temperature, refer to E39.
Page 159 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 2-time flash Keeps flashing Remote control: Outdoor heat exchanger Green LED Red LED Outdoor unit temperature sensor anomaly control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 160 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 1-time flash Keeps flashing Remote control: Outdoor air temperature Green LED Red LED Outdoor unit sensor anomaly control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 161 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 4-time flash Keeps flashing Remote control: Discharge pipe Green LED Red LED Outdoor unit temperature sensor anomaly control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 162 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: High pressure error Green LED Red LED Outdoor unit (63H1 activated) control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If the power source breaker is turned OFF and ON too quickly, E40 may be displayed.
Page 163 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 1-time flash Remote control: Current cut (1/2) Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the power source Check power source.
Page 164 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 1-time flash Remote control: Current cut (2/2) Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power...
Page 165 '19 • PAC-SM-309 RUN light TIMER light Content Error code Indoor display PCB A/F module anomaly 5-time flash Remote control: E47 (Model FDC100-140VNA-W only) Red LED Green LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model Model FDC Diagnosis Countermeasure...
Page 166 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 7-time flash Remote control: Outdoor fan motor anomaly Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign Remove foreign material.
Page 167 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: Low pressure error or Green LED Red LED low pressure sensor anomaly (1/2) Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 168 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: Low pressure error or Green LED Red LED low pressure sensor anomaly (2/2) Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 169 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 4-time flash Remote control: Inverter and fan motor anomaly Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure •...
Page 170 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 5-time flash Keeps flashing Remote control: Suction pipe temperature Green LED Red LED sensor anomaly Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 171 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: Low pressure sensor anomaly Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the connection of low pressure Correct low pressure sensor sensor connectors (at sensor side...
Page 172 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display 7-time flash Remote control: Insufficient refrigerant amount or detection of service valve closure Green LED Red LED Outdoor unit control PCB Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 173 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: Compressor startup failure (1/2) Green LED Red LED Outdoor unit control PCB Keeps flashing 5-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure In case that the compressor does not start at all and no sound or vibration exists Check the power source...
Page 174 '19 • PAC-SM-309 RUN light TIMER light Error code Content Indoor display Remote control: Compressor startup failure (2/2) Green LED Red LED Outdoor unit control PCB Keeps flashing 5-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the (Outdoor unit main PCB anomaly) Replace outdoor unit main...
Page 175 '19 • PAC-SM-309 PJF012D045 PJF012D045 DISASSEMBLY PROCEDURE 1.3 DISASSEMBLY PROCEDURE DISASSEMBLY PROCEDURE Precaut ions for safety Precaut ions for safety Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way. When disassembling, be sure to turn oﬀ...
Page 176 '19 • PAC-SM-309 PJF012D045 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 177 The electrical components are under high voltage by the opera on of the booster capacitor. ● Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock. When parts of refrigerant cycle is disassembled by welding, be sure to work a er collec ng a refrigerant, if the refrigerant isn't ●...
Page 178 '19 • PAC-SM-309 PJA012D792A PROCEDURE & PICTURES 6. To remove the thermistors (example"Thi-R1") (1) Remove the lid of control box.(See No.1) (2) Disconnect the thermistor connector(CNNx). (3) Remove the drain pan.(See No.3) (4) Pull out the thermistor "Thi-R1" from the sensor holder. 7.
Page 179 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. Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock. When parts of refrigerant cycle is disassembled by welding, be sure to work after collecting a refrigerant, if the refrigerant isn't '19 •...
Page 180 PJG012D019 '19 • PAC-SM-309 PROCEDURE & PICTURES 7. To remove the drain pump(DM) and ﬂot switch(FS) (1) Remove the lid of control box.(See No.1) (2) Remove 5 drain pump assembly ﬁxing screws and remove it. mark) (3) Disconnect the drain pump connector(CNR) on PCB in control box. (4) Pull a hose to the arrow direction and remove it.
Page 181 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. Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock. When parts of refrigerant cycle is disassembled by welding, be sure to work after collecting a refrigerant, if the refrigerant isn't '19 •...
Page 182 '19 • PAC-SM-309 PFA012D631 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 183 '19 • PAC-SM-309 (e) SRK series PHA012D402...
Page 184 '19 • PAC-SM-309 Screw...
Page 185 '19 • PAC-SM-309 PHA012D402...
Page 186 '19 • PAC-SM-309 PHA012D402...
Page 187 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. ● Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock. When parts of refrigerant cycle is disassembled by welding or low pressure sensor is removed, be sure to work after collecting ●...
Page 188 PCA012D089A PROCEDURE & PICTURES PCA012D089A '19 • PAC-SM-309 PROCEDURE & PICTURES 7. To remove the low pressure sensor (PSL) (1) Remove the service panel.(See No.1) (2) Disconnect the PSL connector(CNPSL) on PCB in control box. 7. To remove the low pressure sensor (PSL) (3) Turn PSL unticlockwise and remove it.
Page 189 '19 • PAC-SM-309 1.4 ELECTRICAL WIRING (1) Indoor units (a) Ceiling cassette-4 way type (FDT) Models FDT50VH, 60VH, 71VH, 100VH, 125VH, 140VH PJF000Z554...
Page 190 '19 • PAC-SM-309 (b) Ceiling casette-4 way compact type (FDTC) Models FDTC50VH, 60VH PJF000Z516...
Page 191 '19 • PAC-SM-309 (c) Duct connected-High static pressure type (FDU) Models FDU100VH, 125VH, 140VH PJG000Z580...
Page 192 '19 • PAC-SM-309 (d) Duct connected-Low / Middle static pressure type (FDUM) Model FDUM50VH PJG000Z488...
Page 193 '19 • PAC-SM-309 Models FDUM60VH, 71VH PJG000Z489...
Page 194 '19 • PAC-SM-309 Models FDUM100VH, 125VH, 140VH PJG000Z490...
Page 195 '19 • PAC-SM-309 (e) Ceiling suspended type (FDE) Models FDE50VH, 60VH, 71VH, 100VH, 125VH, 140VH PFA004Z087...
Page 196 '19 • PAC-SM-309 (f) Wall mounted type (SRK) Models SRK50ZSX-W, 60ZSX-W RWA000Z413...
Page 197 '19 • PAC-SM-309 Models SRK71ZR-W, 100ZR-W RWA000Z417...
Page 198 '19 • PAC-SM-309 (2) Outdoor units Models FDC100VNA-W, 125VNA-W, 140VNA-W PCA001Z854...
Page 199 '19 • PAC-SM-309 Models FDC100VSA-W, 125VSA-W, 140VSA-W PCA001Z855...
Page 200 '19 • PAC-SM-309 1.5 PIPING SYSTEM (1) Single type Models 100, 125, 140 Indoor unit Outdoor unit Cooling cycle Heating cycle 4-way valve Check joint Temperature sensor Muffler Gas line (Tho-A) ( ø 15.88) Flare connecting Service valve (Flare connecting) Temperature sensor (Heat exchanger) Heat exchanger...
Page 201 '19 • PAC-SM-309 (3) Triple type Model 140 Gas branch pipe ø 12.7) Indoor unit Indoor unit Indoor unit Cooling cycle Heating cycle 4-way valve Check joint Temperature sensor Gas line Muffler (Tho-A) ø 15.88) Flare connecting Temperature sensor Service valve (Heat exchanger) (Flare connecting) Heat exchanger...
Page 202 '19 • PAC-SM-309 2. V MULTI SYSTEM CONTENTS 2.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ......202 2.2 MAINTENANCE DATA ...................202 2.3 DISASSEMBLY PROCEDURE ................202 2.4 ELECTRICAL WIRING ...................202 2.5 PIPING SYSTEM ....................202...
Page 203 '19 • PAC-SM-309 2.1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .... See page 2.2 MAINTENANCE DATA ................See page 50 2.3 DISASSEMBLY PROCEDURE ..............See page 174 2.4 ELECTRICAL WIRING ................See page 188 2.5 PIPING SYSTEM ..................See page 199...
Page 204 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. 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. © Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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