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SERVICE
SERVICE
MANUAL
MANUAL
FDA Series Split Systems
FDA Series Split Systems
FDA Series Multi Systems
FDA Series Multi Systems
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MITSUBISHI HEAVY INDUSTRIES - PAC SERVICE MANUAL INDEX MAINTENANCE DATA 2 ERROR CODES 4 PCB INDOOR UNITS 8 ERROR DISPLAY & REMEDY CHART 12 PCB OUTDOOR UNITS 22 ERROR DISPLAY – OUTDOOR UNIT 25 OPERATIONAL DATA CHECK – WIRED CONTROLLER 35 REMOTE CONTROL – WIRED 36 - SETTING FUNCTIONS 37 ERROR DISPLAY – WIRELESS CONTROL 43 REMOTE CONTROL WIRELESS 44
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1. MAINTENANCE DATA 1.1 Servicing (1) Evacuation The evacuation is a procedure to purge impurities, such as noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refriger- ant equipment will freeze, causing what is called ice clogging. Evacuation procedure Make sure that the both service valves of gas and liquid line are fully opened. Indoor unit (a) Check to ens
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(2) Refrigerant charging (a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder. (b) Purge air from the charge hose A . First loosen the connecting portion of the charge hose at the gauge manifold side and open valve 3 for a few seconds, and then immediately retighten it after observing that gas has blown out from loosened connecting portion. (c) Open valves 1 and 3 then gas refrigerant begins flowing from the cylinder into the unit
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1.3 Diagnosing of microcomputer circuit - - 4 (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 controller eroor code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp). 1) Indoor unit side Remote Indoor unit LED Outdoor unit LED controller Cause Green Red Green Red error code Normal Keeps flashing Stays OFF Keeps flash
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- - 5 2) Outdoor unit side Remote Indoor unit LED Outdoor unit LED controller Cause Green Red Green Red error code Keeps flashing Keeps flashing Wiring is open or reversal phase (FDCA 301~601 type) E32 Stays OFF 1 time flash Inverter primary side current is abnormal. (FDCVA151~251 type) Keeps flashing Stays OFF Keeps flashing 1 time flash E33 Abnormal current cut of compressor (FDCA 301~601 type) E34 Keeps flashing Stays OFF Keeps flashing 1 time flash 52C secondary side L3-phase wiring is ope
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(b) Display sequence of error, inspection display lamp 1) One kind error Display corresponding to the error is shown. 2) More than one errors. Section Display section • Displays the error of higher priority (When plural errors are persisting) Error code of remote controller ··········· ··········· Inspection LED (red) of indoor unit PCB • Displays the present errors. Inspection LED (red) of outdoor unit PCB (When a new error has occurred after the former error was reset.) 3) Timing of error de
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4) Recording and reset of error Error display Memory Reset (1) Error code of remote • Saves in memory the mode of higher • Stop the unit operation by pressing the ON/OFF switch of remote controller priority controller. • Operation can be started again if the error has been reset. Indoor unit inspection lamp • Cannot save in memory (red) (1) Outdoor unit inspection lamp • Saves in memory the mode of higher priority (red) Notes (1) Priority is in the order of E1 > ... > E10 > ... > E60. In
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IC7 Parts layout on the indoor unit PCB Model: FDT series Fan motor To power supply (151~401) (CNW7) To power supply PCB (501, 601) (CNW9) C41 CNW7 CNR Louver motor CNM3 CNV L2 Fan motor C23 CNW9 TM1 (501, 601) 52X8-1 KN1 R17 52X7 52X6 52X1 52X2 52X3 PC2 PC1 C12 C13 C1 52X4 PC5 IC8 Power supply PCB C11 (CNW8) IC12 CNG L1 IC3 IC11 CNB C58 LED2 Remote LED1 controller SW7 C3 C5 C4 Connector (CNT) ON 12 34 J1~J4 SW2 SW8 SW9 SW10 SW5 (SW7) ON Address switch 12 34 DIP switch CNY CNI (SW2) (SW9) CNH
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Model: FDEN series PCB power supply connector (Primary side) Power supply L2 CNW1 CNW0 CNM1 PCB power supply connector IC7 IC8 (Secondary side) Remote controller Fan motor L1 CNE DIP switch (SW5) SW2 SW5 SW8 J5, J6 SW10 SW9 SW7 (SW8) C57 CNH CNN1 CNQ CNT J1~J4 (SW7) DIP switch (SW9) Address switch Connector J9~J11 (SW2) (CNT) (SW10) Heat exchanger thermistor, Heat exchanger thermistor Return air thermistor (Thl-R2) (Thl-R1, Thl-A) ● Control change switch (SW5, SW9, SW10) ● Change by the jumper
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IC11 R62 CNB J4 J3 J2 J1 J8 J11 J7 J10 J6 J9 J5 Model: FDKN series This diagram shows the PCB for the 151~251. The component layout on the 301 PCB is different, but the functions are the same. Heat exchanger thermistor, Return air thermistor Remote controller Heat exchanger thermistor J31 (Thl-R1, Thl-A) (Thl-R2) TB,3 R16 Dip switch R17 CNH CNN1 (SW5) TB,2 CNZ L1 L2 SW10 SW5 J9~J11 TB,1 (SW10) Dip switch G (SW9) J31 SW9 SW8 CNW1 J5~J8 (SW8) SW7 PCB power supply connector R151 J1~J4(SW7) (Primary
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Model: FDUR series Heat exchanger thermistor, Return air thermistor Address swith J6 (Thl-R1, Thl-A) (SW2) (SW8) Heat exchanger thermistor DIP switch DIP switch (Thl-R2) (SW5) (SW9) Float switch Remote controller Connector J10~J11 J1~J4 (CNT) (SW10) (SW7) CNB CNQ CNN1 CNF CNZ CNI CNH CNN2 CNT CNV SW8 SW9 SW2 SW10 CNO SW5 SW7 Drain motor LED2 LED1 CNE 52X3 52X2 52X1 52X6 F1 CNG CNW2 CNW1 CNM3 CNW0 CNK1 CNK2 PCB power supply connector Power supply PCB power supply connector (Primary side) (Seconda
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(c) Check method when the error code is display Remote controller or Indication board: Inspection LED, error code Indoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display) Outdoor unit PCB: ARed LED (inspection display), Green LED (CPU. normal display) Error display : No display 1 [Power supply line error] LCD display : No display Indoor unit Outdoor unit Red LED Stays OFF Red LED Stays OFF Green LED Stays OFF Green LED Stays OFF Note (1) The green LED in the outdoor unit
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Indoor unit Outdoor unit Red LED 3 time flash Red LED Stays OFF Green LED Keeps flashing Green LED Keeps flashing Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only. Remote NO controller wiring Correction connect check (Red· White·Black) OK (1) YES NO Approximately Remote controller wire Power supply reset disconnection? 10 ~ 11 V between Normal? Remote controller defective X and Z. Note (1) Z is GND. NO YES Remote controller wire Maltifunction by is removed
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Indoor – outdoor communications trouble ” Error display “ WAIT 2 (Initial (when the power is turned on) Indoor unit Outdoor unit Red LED Stays OFF Red LED 2 time flash Green LED Keeps flashing Green LED Keeps flashing Notes (1) If trouble occurs during communications, the error code E5 is displayed (Outdoor, Red LED flashes 2 times). The check procedure is as shown below. (However, excluding connection related problems) Also, if the power supply is reset after E5 occurs, if the trouble is int
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Error display : e1 [Communication error between remote controller~Indoor unit] 3 Indoor unit Outdoor unit Red LED Stays OFF Red LED Stays OFF Green LED Keeps flashing Green LED Keeps flashing Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only. Voltage YES between X and Z Replacement remote Remote controller approximately controller wire is removed 10~11 V? NO Is the NO resistance between YES Replacement Voltage Y~Z on the remote controller NO remote controlle
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Error display : e6 [Defective indoor unit heat exchanger thermistor] 4 Indoor unit Outdoor unit Return air thermistor (ThI-A) Stays OFF Red LED 1 time flash Red LED Indoor unit heat exchanger thermistor Keeps flashing (ThI-R1, R2) Green LED Keeps flashing Green LED Resistance temperature characteristics Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only. Defective indoor unit control PCB 15 Replace-ment (Defective indoor unit heat exchanger thermistor i
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Error display : e8 [Heating overload] 6 Indoor unit Outdoor unit Stays OFF Red LED 1 time flash Red LED Keeps flashing Green LED Keeps flashing Green LED Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only. Notes (1) Check if the overload state exists or not using the following check points. YES Is there a short circuit? Clean it. Is the air filter clogged? Is the indoor heat exchanger dirty or clogged? Is the outdoor unit’s fan control normal? ( (
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[Control of 1 remote controller VS multiple units Error display : e10 8 Excessive number of units (more than 17 units) ] Indoor unit Outdoor unit Stays OFF Red LED Stays OFF Red LED Keeps flashing Green LED Keeps flashing Green LED Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only. Are more YES than 17 units connected Reduce to 16 units to a remote or less controller? NO Defective indoor unit control PCB Replacement [Fan motor abnormalities] Error display :
