Mitsubishi Heavy Industries FDTC40ZSXW1VH Service Manual
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Mitsubishi Heavy Industries FDTC40ZSXW1VH Service Manual

Hyper inverter packaged air-conditioners (split system, air to air heat pump type)
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SERVICE MANUAL
HYPER INVERTER PACKAGED
AIR-CONDITIONERS
(Split system, air to air heat pump type)
CEILING CASSETTE-
4 WAY COMPACT TYPE
FDTC40ZSXW1VH
50ZSXW1VH
60ZSXW1VH
DUCT CONNECTED-LOW/
MIDDLE STATIC PRESSURE TYPE
FDUM40ZSXW1VH
50ZSXW1VH
60ZSXW1VH
Manual No.'18 • PAC-SM-298
CEILING SUSPENDED
TYPE
FDE40ZSXW1VH
50ZSXW1VH
60ZSXW1VH

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Summary of Contents for Mitsubishi Heavy Industries FDTC40ZSXW1VH

  • Page 1 Manual No.'18 • PAC-SM-298 SERVICE MANUAL HYPER INVERTER PACKAGED AIR-CONDITIONERS (Split system, air to air heat pump type) CEILING CASSETTE- CEILING SUSPENDED 4 WAY COMPACT TYPE TYPE FDTC40ZSXW1VH FDE40ZSXW1VH 50ZSXW1VH 50ZSXW1VH 60ZSXW1VH 60ZSXW1VH DUCT CONNECTED-LOW/ MIDDLE STATIC PRESSURE TYPE FDUM40ZSXW1VH...
  • Page 2 '18 • PAC-SM-298 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER …………… 3 1.1 Remote control (Option parts) ……………………………………………… 3 1.2 Operation control function by the wired remote control ……………… 5 1.3 Operation control function by the indoor control ……………………… 8 (1) Auto operation ………………………………………………………………...
  • Page 3 '18 • PAC-SM-298 (35) Indoor unit overload alarm (RC-EX3A only) …………………………… 24 (36) Peak-cut timer (RC-EX3A only) ………………………………………… 24 (37) Motion sensor control (RC-EX3A only) ………………………………… 24 1.4 Operation control function by the outdoor control ………………… 26 (1) Defrost operation ………………………………………………………… 26 (2) Cooling overload protective control ………………………………………...
  • Page 4 '16 • PAC-T-251 '18 • PAC-SM-298 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 1.1 Remote control (Option parts) Wired remote control (1) Wired remote control Model RC-EX3A Model RC-EX3A ⑤ LCD (with backlight) ③...
  • Page 5 '18 • PAC-SM-298 Wired remote control Model RC-E5 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 6 '16 • PAC-T-251 '18 • PAC-SM-298 1.10.2 Operation control function by the wired remote control 1.2 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 7 '18 • PAC-SM-298 ●Content memorized with the power failure compensation are as follows. Note(1) Items (f) and (g) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not. At power failure –...
  • Page 8 '18 • PAC-SM-298 ● 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.
  • Page 9 '18 • PAC-SM-298 1.3 Operation control function by the indoor control (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 10 '18 • PAC-SM-298 (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 11 '18 • PAC-SM-298 (b) FDE, FDUM 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 12 '18 • PAC-SM-298 (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 13 '18 • PAC-SM-298 (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 14 '18 • PAC-SM-298 (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 15 '18 • PAC-SM-298 (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 16 '18 • PAC-SM-298 (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 17 '18 • PAC-SM-298 (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 18 SW5 setting '18 • PAC-SM-298 Switch SW5-1 SW5-2 Unit Master unit Slave unit a (17) Plural unit control – Control of 16 units group by one remote control Slave unit b (a) Function Slave unit c 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.
  • Page 19 '18 • PAC-SM-298 (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 20 '18 • PAC-SM-298 (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 21 '18 • PAC-SM-298 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 22 '18 • PAC-SM-298 (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 23 '18 • PAC-SM-298 (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 24 '18 • PAC-SM-298 (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 25 '18 • PAC-SM-298 (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 26 '18 • PAC-SM-298 (37) Motion sensor control (RC-EX3A 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 The indoor unit which is set to “Enable”...

  • Page 27: (A) Operating Conditions

    4-way valve (3 minutes ON) 12-42rps 12-50rps 12-66rps 12-78rps 12-90rps *It can be set the indoor fan motor off or the heating thermostat OFF with connecting a wired remote control. 12-30rps 12-30rps 12-30rps 12-38rps 12-38rps In the case, indoor air temperature is detected by sensor on the wired remote control. 12-50rps 12-66rps 12-78rps...

  • Page 28: Table Of Contents

    (a) Operating conditions When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41°C or more, or 47ºC or more with the compressor running, the lower limit speed of compressor is brought up. 47ºC or more with the compressor running, the lower limit speed of compressor is brought up.

  • Page 29: Lower

    '18 • PAC-SM-298 (c) Reset conditions When either of the following condition is satisfied (i) The outdoor air temperature (TH2) is D°C or higher. (ii) The compressor speed is 0 rps. (5 ) Heating high pressure control (5) Heating high pressure control (a) Purpose (a) Starting condition When the indoor heart exchanger temperature (Thi-R) has risen to a specified temperature while the compressor is turned on.

  • Page 30: Lower

    '18 • PAC-SM-298 (7) Heating low outdoor temperature protective control Operating conditions When the outdoor air temperature (TH2) is lower than 4℃ or higher continues for 30 seconds while the compressor speed is other than 0 rps. (b) Detail of operation The lower limit compressor speed is change as shown in the figure below.
  • Page 31 SRK50 24 rps 24 rps has elapsed '18 • PAC-SM-298 '09•SRK-DB-087D '09•SRK-DB-087D (12) Serial signal transmission error protection (12) Serial signal transmission error protection Purpose Purpose (b) Detail of operation (b) Detail of operation (13) Rotor lock (13) Rotor lock (14) Outdoor fan motor protection (14) Outdoor fan motor protection (15) Outdoor fan control at low outdoor temperature...
  • Page 32 Outdoor fan '18 • PAC-SM-298 Outdoor air temperature > 10˚C Lower limit fan speed Outdoor air temperature < = 10˚C Outdoor fan Outdoor temperature > 16˚C Outdoor temperature < = 16˚C 21°C -38°C (iii) Reset conditions Reset conditions: Heating (i) Operating conditions (ii) Heating Operating conditions:...
  • Page 33 '18 • PAC-SM-298 2. MAINTENANCE DATA 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 34 '18 • PAC-SM-298 (ii) Outdoor unit Remote control Indoor control PCB Outdoor control PCB Reference Location of trouble Description of trouble Repair method Green Error code Red LED Red LED Red LED page Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger...
  • Page 35 '18 • PAC-SM-298 (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 36 '18 • PAC-SM-298 ■ 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 control PCB •...
  • Page 37 '18 • PAC-SM-298 1) 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 38 '18 • PAC-SM-298 2) Models FDE, FDUM 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 39 '18 • PAC-SM-298 b) Power PCB This PCB is a general PCB. Replace the PCB according to this instruction. i) Replace the PCB ① Unscrew terminal of the wiring(yellow/green) connected to terminal block (CNWO) from the box. ② Replace the PCB only after all the wirings connected to the connector are removed. ③...
  • Page 40 '18 • PAC-SM-298 ●DIP switch setting list Switch Description Default setting Remark 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 Keep OFF...
  • Page 41 '18 • PAC-SM-298 (4) 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 microcomputor 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 microcomputor, but also the anomaly in power source system, installation space, overload resulting from improper charging amount of refrigerant and etc.
  • Page 42 '18 • PAC-SM-298 (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 43 '18 • PAC-SM-298 (b) In case of RC-E5 remote control Data Item Number 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 44 '18 • PAC-SM-298 (6) Inverter checker for diagnosis of inverter output 　●Checking method 1) Setup procedure of checker a) Power OFF (Turn off the breaker). b) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. c) 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 45 '18 • PAC-SM-298 (7) Outdoor unit control failure diagnosis circuit diagram Models SRC40ZSX-W1, SRC50ZSX-W1, 60ZSX-W1 ◆Check point of outdoor unit CAUTION - HIGH VOLTAGE High voltage is produced in the control box. Don't touch ◆Power source and serial signal inspection electrical parts in the control box for 5 minutes after the unit is stopped.
  • Page 46 '18 • PAC-SM-298...
  • Page 47 '18 • PAC-SM-298 2.2 Troubleshooting flow (1) List of troubles 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)
  • Page 48 '18 • PAC-SM-298 (2) 　 Troubleshooting 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 It is normal. (This unit is designed to start in the soft start mode by detecting the under dome temperature of compressor...
  • Page 49 '18 • PAC-SM-298 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 It is normal. (This unit is designed to start in the soft start mode by detecting the under dome temperature of...
  • Page 50 '18 • PAC-SM-298 '18 • PAC-SM-298 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 Replace compressor.
  • Page 51 '18 • PAC-SM-298 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 after stopping operation considered that the air-...
  • Page 52 '18 • PAC-SM-298 '18 • PAC-SM-298 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 53 '18 • PAC-SM-298 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 54 '18 • PAC-SM-298 '18 • PAC-SM-298 Green Louver motor failure Content Error code Keeps flashing Stays OFF Indoor None Remote control: (FDTC and FDE only) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTC and FDE series only Diagnosis Countermeasure ▲...
  • Page 55 '18 • PAC-SM-298 Green Error code Content Power source system error Indoor Stays OFF Stays OFF Remote control: None (Power source to indoor unit control PCB) Outdoor 2-time flash Keeps flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between on the terminal block...
  • Page 56 '18 • PAC-SM-298 '18 • PAC-SM-298 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 57 '18 • PAC-SM-298 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 58 '18 • PAC-SM-298 '18 • PAC-SM-298 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 59 '18 • PAC-SM-298 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote control: WAIT initial operation (1/3) Outdoor – 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote control LCD displays “ ”...
  • Page 60 '18 • PAC-SM-298 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote control: WAIT initial operation (2/3) Outdoor – 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the fuse is blown, the method to inspect inverter before replacing the power Isn’t there...
  • Page 61 '18 • PAC-SM-298 Green Error code Content Communication error at Indoor Keeps flashing Stays OFF Remote control: WAIT initial operation (3/3) Outdoor – 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure When the remote control display is extinguished after the power on.
  • Page 62 '18 • PAC-SM-298 '18 • PAC-SM-298 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.
  • Page 63 '18 • PAC-SM-298 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 64 '18 • PAC-SM-298 '18 • PAC-SM-298 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 65 '18 • PAC-SM-298 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 66 '18 • PAC-SM-298 '18 • PAC-SM-298 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 67 '18 • PAC-SM-298 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 temperature sensor...
  • Page 68 '18 • PAC-SM-298 '18 • PAC-SM-298 Green Content Drain trouble Error code Keeps flashing 1-time flash Indoor Remote control: (FDTC and FDUM series) Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTC and FDUM series only Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC12V at CNI connector.
  • Page 69 '18 • PAC-SM-298 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 remote control Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17...
  • Page 70 '18 • PAC-SM-298 '18 • PAC-SM-298 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 71 '18 • PAC-SM-298 Green Content Error code Indoor fan motor anomaly Keeps flashing 1(2)-time flash Indoor Remote control: Keeps flashing Stays OFF Outdoor Note (1) Value in (　) is for the FDUM series FMi2 only. 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any foreign material...
  • Page 72 '18 • PAC-SM-298 '18 • PAC-SM-298 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 73 '18 • PAC-SM-298 Green Content Indoor fan motor rotation Error code Keeps flashing 1(2)-time flash Indoor Remote control: speed anomaly Keeps flashing Stays OFF Outdoor Note (1) Value in (　) is for the FDUM series FMi2 only. 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Does any...
  • Page 74 '18 • PAC-SM-298 '18 • PAC-SM-298 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 75 '18 • PAC-SM-298 Green Content Error code Cooling overload operation Keeps flashing Stays OFF Indoor Remote control: – 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of outdoor heat exchanger temperature Are normal sensor, refer to E37.
  • Page 76 '18 • PAC-SM-298 '18 • PAC-SM-298 Green Discharge pipe Content Error code Keeps flashing Stays OFF Indoor temperature error Remote control: 5-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * For the characteristics of discharge Are the pipe temperature, refer to E39. characteristics of Replace discharge pipe discharge pipe temperature...
  • Page 77 '18 • PAC-SM-298 Green Content Error code Outdoor heat exchanger Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly 8-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector. sensor connector connected properly? 2.
  • Page 78 '18 • PAC-SM-298 '18 • PAC-SM-298 Green Content Error code Outdoor air temperature Keeps flashing Stays OFF Indoor Remote control: sensor anomaly 8-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the outdoor air Correct connector. temperature sensor connector connected properly? For the characteristics of outdoor air temperature sensor, see the following graph.
  • Page 79 '18 • PAC-SM-298 Green Error code Content Discharge pipe Indoor Keeps flashing Stays OFF Remote control: temperature sensor anomaly Outdoor 8-time flash 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2.
  • Page 80 '18 • PAC-SM-298 Green Error code Content Service valve (gas side) closing operation Indoor Keeps flashing Stays OFF Remote control: Outdoor 4-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the Open the service valve. service valve (gas side) opened? 2.
  • Page 81 '18 • PAC-SM-298 Green Content Error code Keeps flashing Stays OFF Current cut (1/2) Indoor Remote control: 1-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Power source Check power source. voltage OK? 2. Error detection method Are the Open the valves.
  • Page 82 inverter PCB 1-time flash '18 • PAC-SM-298 '18 • PAC-SM-298 Green Content Error code Keeps flashing Stays OFF Current cut (2/2) Indoor Remote control: 1-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the checked result of power Defective outdoor unit transistor module PCB ➞...
  • Page 83 '18 • PAC-SM-298 Green Error code Content Indoor Keeps flashing Stays OFF Remote control: Active filter voltage error 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Restore normal condition. Is the power source normal? 2. Error detection method Is voltage Restore normal condition.
  • Page 84 '18 • PAC-SM-298 Green Error code Content Outdoor fan motor anomaly Indoor Keeps flashing Stays OFF Remote control: Outdoor 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 85 '18 • PAC-SM-298 Green Green Error code Error code Content Content Power transistor error Power transistor anomaly Indoor Keeps flashing Stays OFF Remote controller: E51 Remote control: Keeps flashing Stays Off Indoor (Models SRC50, 60) Outdoor 1-time flash 5. Troubleshooting 1.
  • Page 86 '18 • PAC-SM-298 Green Error code Content Insufficient refrigerant amount Indoor Keeps flashing Stays OFF Remote control: or detection of service valve closure Outdoor 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the connections of indoor...
  • Page 87 '18 • PAC-SM-298 Green Error code Green Content Error code Content Current safe stop Current safe stop Keeps flashing Stays Off Indoor Remote controller: E58 Indoor Keeps flashing Stays OFF Remote control: (Model SRC50, 60) 3 time flash Outdoor ― Outdoor 3-time flash 5.
  • Page 88 '18 • PAC-SM-298 Green Error code Content Compressor startup failure Indoor Keeps flashing Stays OFF Remote control: Outdoor 2-time 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 89 '18 • PAC-SM-298 Green Error code Content Compressor rotor lock error Indoor Keeps flashing Stays OFF Remote control: Outdoor 7-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Check and correct the power source voltage power source voltage. Reset the power source and restart operation.
  • Page 90 '18 • PAC-SM-298 3. ELECTRICAL WIRING (1) Indoor units (a) Ceiling casette-4 way compact type (FDTC) Models FDTC40VH, 50VH, 60VH PJF000Z516...
  • Page 91 '18 • PAC-SM-298 (b) Ceiling suspended type (FDE) Models FDE40VH, 50VH, 60VH PFA004Z087...
  • Page 92 '18 • PAC-SM-298 (c) Duct connected-Low / Middle static pressure type (FDUM) Models FDUM40VH, 50VH PJG000Z488...
  • Page 93 '18 • PAC-SM-298 Model FDUM60VH PJG000Z489...
  • Page 94 '18 • PAC-SM-298 (2) Outdoor units Models SRC40ZSX-W1, 50ZSX-W1, 60ZSX-W1 RWC000Z306...
  • Page 95 '18 • PAC-SM-298 4. PIPING SYSTEM Models 40, 50, 60 Indoor unit Outdoor unit Cooling cycle Heating cycle Outdoor air Service valve temperature sensor (Flare connecting) (TH2) Gas line (φ12.7) Discharge pipe temperature sensor Flare connecting Check joint (TH3) Temperature sensor Accumulator (Heat exchanger) Muffler...
  • Page 96 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan http://www.mhi-mth.co.jp/en/ Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

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