Mitsubishi Heavy Industries FDT40ZSXVH Service Manual
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Mitsubishi Heavy Industries FDT40ZSXVH Service Manual

Mitsubishi Heavy Industries FDT40ZSXVH Service Manual

Hyper inverter packaged air-conditioners
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SERVICE MANUAL
HYPER INVERTER PACKAGED
AIR-CONDITIONERS
(Split system, air to air heat pump type)
CEILING CASSETTE- 4 WAY TYPE
FDT40ZSXVH
50ZSXVH
60ZSXVH
Manual No.'19・PAC-SM-301

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Summary of Contents for Mitsubishi Heavy Industries FDT40ZSXVH

  • Page 1 Manual No.'19・PAC-SM-301 SERVICE MANUAL HYPER INVERTER PACKAGED AIR-CONDITIONERS (Split system, air to air heat pump type) CEILING CASSETTE- 4 WAY TYPE FDT40ZSXVH 50ZSXVH 60ZSXVH...
  • Page 2 '19 • PAC-SM-301 CONTENTS ....3 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.1 Remote control (Option parts) ..............3 1.2 Operation control function by the wired remote control ....... 6 1.3 Operation control function by the indoor control ......... 9 (1) Auto operation ..................
  • Page 3 '19 • PAC-SM-301 (36) Peak-cut time (RC-EX3A only) ............... 25 (37) Motion sensor control (RC-EX3A only) ..........26 1.4 Operation control function by the outdoor control ......27 (1) Defrost operation ..................27 (2) Cooling overload protective control ............27 (3) Cooling high pressure control ..............
  • Page 4 '16 • PAC-T-251 '19 • PAC-SM-301 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 '19 • PAC-SM-301 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 6: Operation Section

    '16 • PAC-T-251 '19 • PAC-SM-301 Wireless remote control (2) Wireless remote control RCN-E2 Indication section ① OPERATION MODE display Indicates selected operation mode. SET TEMP display Indicates set temperature. SLEEP TIMER time display Indicates the amount of time remaining on the sleep timer. ②...

  • Page 7: Cpu Reset

    '16 • PAC-T-251 '19 • PAC-SM-301 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 8 '19 • PAC-SM-301 ●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 9 '19 • PAC-SM-301 ● 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 10: Operation Control Function By The Indoor Control

    '19 • PAC-SM-301 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 11: Dehumidifying (Dry) Operation

    '16 • PAC-T-251 '19 • PAC-SM-301 (ii) Regardless of the setting temperature, the cooling or heating operation mode is judged according to the "Judgment based on Room temperature/Cooling or Heating and Outdoor temperature/Cooling or Heating". 1) In case of "Room temperature/Cooling < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor perature"...

  • Page 12: Timer Operation

    '19 • PAC-SM-301 (4) Timer operation (a) RC-EX3A 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 13 '19 • PAC-SM-301 (5) Hot start (Cold draft prevention at heating) (a) Operating conditions When either one of following conditions is satisfied, the hot start control is performed. (i) From stop to heating operation (ii) From cooling to heating operation (iii) Form heating thermostat OFF to ON (iv) After completing the defrost operation (only on units with thermostat ON) (b) Contents of operation (i) Indoor fan motor control at hot start 1) Within 7 minutes after starting heating operation, the fan mode is determined depending on the condition of...
  • Page 14 '19 • PAC-SM-301 (7) 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 (i) Louver control 1) To operate the swing louver when the air-conditioner is operating, press the “Direction” button on the TOP screen of remote control.

  • Page 15: Thermostat Operation

    '19 • PAC-SM-301 (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 16: Filter Sign Setting

    '19 • PAC-SM-301 (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 17: Drain Pump Control

    '19 • PAC-SM-301 (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 18: Cooling, Dehumidifying Frost Protection

    '19 • PAC-SM-301 (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 19: High Ceiling Control

    '19 • PAC-SM-301 (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 20 '19 • PAC-SM-301 (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 21 '19 • PAC-SM-301 (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 22 '19 • PAC-SM-301 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 23 '19 • PAC-SM-301 (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 24: Selection Of Cooling/Heating External Input Function

    '19 • PAC-SM-301 (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 25 '19 • PAC-SM-301 (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 26 '19 • PAC-SM-301 (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 27 '19 • PAC-SM-301 (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 28: Operation Control Function By The Outdoor Control

    (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. 12-42rps 12-50rps 12-66rps...
  • Page 29 (a) Operating conditions (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.
  • Page 30 '19 • PAC-SM-301 (5) Heating high pressure control (a) Starting condition When the indoor heart exchanger temperature (Thi-R) has risen to a specified temperature while the compressor is turned on. (b) Compressor speed is controlled according to the zones of indoor heat exchanger temperature as shown by the following table. Thi-R<P1 P1≦Thi-R<P2 P2≦Thi-R<P3 P3≦Thi-R Protection control speed (NP) Normal Retention NP-4rps...

  • Page 31: Heating Low Outdoor Temperature Protective Control

    '19 • PAC-SM-301 (7) Heating low outdoor temperature protective control (a) 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 32 SRK50 24 rps 24 rps has elapsed '19 • PAC-SM-301 '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 33 Outdoor fan '19 • PAC-SM-301 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 3) Reset conditions Reset conditions: Heating 1) Operating conditions (ii) Heating Operating conditions:...

  • Page 34: Maintenance Data

    '19 • PAC-SM-301 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 unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
  • Page 35 '19 • PAC-SM-301 (ii) Outdoor unit Remote control Indoor control PCB Reference Location of trouble Description of trouble Repair method Green Error code Red LED Red LED page Installation, operation status • Higher outdoor heat exchanger temperature Repair Replacement, repair Outdoor heat exchanger Keeps •...
  • Page 36 '19 • PAC-SM-301 (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 • Displays the error of higher priority (When plural errors are persisting) Error code on remote control Red LED on indoor...
  • Page 37 '19 • PAC-SM-301 ■ Error log and reset Error indicator Memorized error log Reset • Stop the unit by pressing the ON/OFF Remote control display • Higher priority error is memorized. switch of remote control. • If the unit has recovered from anomaly, it Red LED on indoor control PCB •...
  • Page 38 '19 • PAC-SM-301 1) Model FDT series a) Replace the control 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. iii) Fix the board such that it will not pinch any of the wires.
  • Page 39 '19 • PAC-SM-301 ●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 40: Troubleshooting At The Outdoor Unit

    '19 • PAC-SM-301 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 then proceed further inspection and remedy Self-diagnosis system by microcomputor on indoor unit PCB can assist to find the cause of malfunction smoothly by making a diagnosis of not only the anomaly of microcomputer, but also the anomaly in power source system, installation space, overload resulting from improper charging amount of refrigerant and etc.
  • Page 41 '19 • PAC-SM-301 (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 42 '19 • PAC-SM-301 (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) ➁...
  • Page 43 '19 • PAC-SM-301 (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 44: Caution - High Voltage

    '19 • PAC-SM-301 (7) Outdoor unit control failure diagnosis circuit diagram Models SRC40ZSX-S, SRC50ZSX-S, 60ZSX-S ◆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 45 '19 • PAC-SM-301...

  • Page 46: Troubleshooting Flow

    '19 • PAC-SM-301 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 47: Operates But Does Not Cool

    '19 • PAC-SM-301 (2) Troubleshooting Green Error code Content Remote control: None Operates but does not cool Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature differnce between return and supply air. It is normal.

  • Page 48: Operates But Does Not Heat

    '19 • PAC-SM-301 Green Error code Content Remote control: None Operates but does not heat Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature differnce between return and supply air. It is normal.

  • Page 49: Earth Leakage Breaker Activated

    '19 • PAC-SM-301 Green Error code Content Remote control: None Earth leakage breaker activated Stays OFF Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are OK the insulation resistance and Replace compressor. coil resistance of compressor? 2.

  • Page 50: Excessive Noise/Vibration

    '19 • PAC-SM-301 Green Error code Content Remote control: None Excessive noise/vibration (1/3) – – Indoor 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 51 '19 • PAC-SM-301 Green Error code Content Remote control: None Excessive noise/vibration (2/3) – – Indoor 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 52: All Models

    '19 • PAC-SM-301 Green Error code Content Remote control: None Excessive noise/vibration (3/3) – – Indoor 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 2.

  • Page 53: Louver Motor Failure

    '19 • PAC-SM-301 Green Error code Content Louver motor failure Remote control: None Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ▲ Check at the indoor unit side. Operate after waiting for more than 1 minute. Does the louver operate at the power 2.
  • Page 54 '19 • PAC-SM-301 Green Error code Content Power source system error Remote control: None (Power source to indoor unit control PCB) Indoor Stays OFF Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure AC220/240V detected between on the terminal block of indoor unit? AC380/415V...

  • Page 55: Power Source System Error (Power Source To Remote Control)

    '19 • PAC-SM-301 Green Error code Content Power source system error Remote control: None (Power source to remote control) Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of the Correct. remote control's wiring OK? X (white), Y (black) 2.

  • Page 56: Applicable Model

    '19 • PAC-SM-301 Green Error code Content INSPECT I/U Remote control: INSPECT I/U Keeps flashing Stays OFF Indoor (When 1 or 2 remote controls are connected) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are 2 units of remote control connected? ⑴，...
  • Page 57 '19 • PAC-SM-301 Green Error code Content INSPECT I/U Remote control: INSPECT I/U Keeps flashing Stays OFF Indoor (Connection of 3 units or more remote controls) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than Reduce to 2 units or less. 3 units of remote control connected? Does remote...

  • Page 58: Communication Error At Initial Operation

    '19 • PAC-SM-301 Green Error code Content Communication error at Remote control: WAIT initial operation (1/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All Models Diagnosis Countermeasure When the remote control LCD displays “ ” 2 WAIT minutes after the power on.
  • Page 59 '19 • PAC-SM-301 Green Error code Content Communication error at Remote control: WAIT initial operation (2/3) Indoor Keeps flashing Stays OFF 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 source fuse...
  • Page 60 '19 • PAC-SM-301 Green Error code Content Communication error at Remote control: WAIT initial operation (3/3) Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All Models Diagnosis Countermeasure When the remote control display is extinguished after the power on. Remote control display is extinguished after the power on.
  • Page 61 '19 • PAC-SM-301 Green Error code Content No display Remote control: None Stays OFF Stays OFF Indoor 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 terminals? 2.
  • Page 62 '19 • PAC-SM-301 Green Error code Content Remote control Remote control: Keeps flashing Stays OFF Indoor communication circuit error 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Is it possible to Check peripheral reset normally by the environment.

  • Page 63: Communication Error During Operation

    '19 • PAC-SM-301 Green Error code Content Remote control: Communication error during operation Keeps flashing 2-time flash Indoor 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 64 '19 • PAC-SM-301 Green Error code Content Indoor heat exchanger Remote control: temperature sensor anomaly Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of indoor heat Correct. ➞ Insert connector exchanger temperature sensor securely.
  • Page 65 '19 • PAC-SM-301 Green Error code Content Return air temperature Remote control: sensor anomaly Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the connection of return Correct. ➞ Connect air temperature sensor connector. connector OK? 2.

  • Page 66: Heating Overload Operation

    '19 • PAC-SM-301 Green Error code Content Remote control: Heating overload operation Keeps flashing 1-time flash Indoor 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 exchanger temperature connection OK?

  • Page 67: Drain Trouble

    '19 • PAC-SM-301 Green Error code Content Drain trouble Remote control: Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC12V at CNI connector. Check float switch.
  • Page 68 '19 • PAC-SM-301 Excessive number of connected Green Error code Content indoor units (more than 17 units) Remote control: Keeps flashing Stays OFF Indoor by controlling with one remote control 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Aren't more than 17 Defective remote control indoor units connected to one ➞...

  • Page 69: Address Setting Error Of Indoor Units

    '19 • PAC-SM-301 Green Error code Content Address setting error of Remote control: indoor units Keeps flashing Keeps flashing Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E11 occurs Is “Master IU address set” function of remote 2. Error detection method control used? IU address has been set using the “Master IU address set”...

  • Page 70: Indoor Fan Motor Anomaly

    '19 • PAC-SM-301 Green Error code Content Indoor fan motor anomaly Remote control: Keeps flashing 1-time flash Indoor 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 71 '19 • PAC-SM-301 Green Error code Content Indoor unit operation check, Remote control: drain pump moter check setting error Keeps flashing 1-time flash Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON Defective indoor unit Is SW7-1 control PCB (Defective on the indoor unit control...

  • Page 72: Indoor Fan Motor Rotation Speed Anomaly

    '19 • PAC-SM-301 Green Error code Content Indoor fan motor rotation Remote control: speed anomaly Keeps flashing 1-time flash Indoor 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 73 '19 • PAC-SM-301 Green Error code Content Defective panel switch operation Remote control: Indoor Keeps flashing 1-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Reset the error and close Is grill opened? the grill. Does matter improve if panel 2.
  • Page 74 '19 • PAC-SM-301 Green Error code Content Remote control Remote control: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the remote Correct. control temperature sensor connected properly? 2. Error detection method Are the characteristics of Is the remote...
  • Page 75 '19 • PAC-SM-301 Green Error code Content Cooling overload operation Remote control: Keeps flashing Stays OFF Indoor Note (1) This LED isinstalled on models SRC40-60 only. 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: Discharge Pipe Temperature Error

    '19 • PAC-SM-301 Green Error code Content Discharge pipe temperature error Remote control: Keeps flashing Stays OFF Indoor 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 sensor...

  • Page 77: Outdoor Heat Exchanger Temperature Sensor Anomaly

    '19 • PAC-SM-301 Green Error code Content Outdoor heat exchanger Remote control: temperature sensor anomaly Keeps flashing Stays OFF Indoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the outdoor heat exchanger temperature Correct connector. sensor connector connected properly? 2.

  • Page 78: Outdoor Air Temperature Sensor Anomaly

    '19 • PAC-SM-301 Green Error code Content Outdoor air temperature Remote control: sensor anomaly Keeps flashing Stays OFF Indoor 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: Discharge Pipe Temperature Sensor Anomaly

    '19 • PAC-SM-301 Green Content Error code Discharge pipe Remote control: temperature sensor anomaly Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model Diagnosis Countermeasure All models Is the discharge pipe temperature sensor Correct connector. connector connected properly? 2. Error detection method For the characteristics of discharge pipe Are the temperature sensor, see the following graph.
  • Page 80 '19 • PAC-SM-301 Green Error code Content Service valve (gas side) closing operation Remote control: Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are the Open the service valve. service valve (gas side) opened? 2.

  • Page 81: Current Cut

    '19 • PAC-SM-301 Green Error code Content Current cut (1/2) Remote control: Keeps flashing Stays OFF Indoor 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 '19 • PAC-SM-301 Green Error code Content Current cut (2/2) Remote control: Keeps flashing Stays OFF Indoor 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: Active Filter Voltage Error

    '19 • PAC-SM-301 Green Error code Content Remote control: Active filter voltage error Indoor Keeps flashing Stays OFF 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. within the specified range? Error is displayed if the converter voltage exceeds target...
  • Page 84 '19 • PAC-SM-301 Green Error code Content Outdoor fan motor anomaly Remote control: Indoor Keeps flashing Stays OFF 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 '19 • PAC-SM-301 Green Green Error code Error code Content Content Power transistor error Power transistor anomaly Remote controller: E51 Remote control: Indoor Keeps flashing Stays OFF Keeps flashing Stays Off Indoor (Models SRC50, 60) 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 86 '19 • PAC-SM-301 Green Error code Content Insufficient refrigerant amount Remote control: or detection of service valve closure Indoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the Open fully. service valve fully opened? Are the connections of indoor heat exchanger and/or return air Correct indoor heat...
  • Page 87 '19 • PAC-SM-301 Green Error code Green Content Error code Content Current safe stop Current safe stop Keeps flashing Stays Off Indoor Remote controller: E58 Remote control: Indoor Keeps flashing Stays OFF (Model SRC50, 60) 3 time flash Outdoor ― 5.
  • Page 88 '19 • PAC-SM-301 Green Error code Content Compressor startup failure Remote control: Indoor Keeps flashing Stays OFF 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 Replace outdoor fan motor.
  • Page 89 '19 • PAC-SM-301 Green Error code Content Compressor rotor lock error Remote control: Indoor Keeps flashing Stays OFF 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. 2.

  • Page 90: Electrical Wiring

    '19 • PAC-SM-301 3. ELECTRICAL WIRING (1) Indoor units Models FDT 40VH, 50VH, 60VH PJF000Z554...
  • Page 91 '19 • PAC-SM-301 (2) Outdoor units Models SRC40ZSX-S, 50ZSX-S, 60ZSX-S RWC000Z298...

  • Page 92: Piping System

    '19 • PAC-SM-301 4. PIPING SYSTEM (1) Single type 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...
  • Page 93 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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