Mitsubishi FDTW28KXZE3-W Service Manual
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Mitsubishi FDTW28KXZE3-W Service Manual

Mitsubishi FDTW28KXZE3-W Service Manual

Vrf inverter multi-system air-conditioners
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SERVICE MANUAL
VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS
(INDOOR UNIT)
Ceiling cassette-2 way type
FDTW28KXZE3-W
45KXZE3-W
56KXZE3-W
71KXZE3-W
90KXZE3-W
112KXZE3-W
140KXZE3-W
Ceiling cassette-1 way compact type
FDTQ22KXZE3-W
28KXZE3-W
36KXZE3-W
Duct connected-Compact and flexible type
FDUH22KXZE3-W
28KXZE3-W
36KXZE3-W
Notes:
●
(1) Safety measures are required for this model depending on the installation conditions.
Refer to SAFETY MEASURE MANUAL No. '23·KX-T-430 for details.
(2) Regarding the outdoor unit series, refer to the SERVICE MANUAL No.'23 • KX-SM-431.
Manual No.'23 • KX-SM-445
Ceiling cassette-1 way type
FDTS45KXZE3-W
71KXZE3-W

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Summary of Contents for Mitsubishi FDTW28KXZE3-W

  • Page 1 Manual No.'23 • KX-SM-445 SERVICE MANUAL VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS (INDOOR UNIT) Ceiling cassette-2 way type Ceiling cassette-1 way type FDTW28KXZE3-W FDTS45KXZE3-W 45KXZE3-W 71KXZE3-W 56KXZE3-W 71KXZE3-W 90KXZE3-W 112KXZE3-W 140KXZE3-W Ceiling cassette-1 way compact type FDTQ22KXZE3-W 28KXZE3-W 36KXZE3-W Duct connected-Compact and flexible type...

  • Page 2: Table Of Contents

    '23 • KX-SM-445 CONTENTS 1. OUTLINE OF OPERATION CONTROL BY MYCROCOMPUTER ................1.1 Remote control (Option parts) 1.2 Operation control function by the wired remote control ......1.3 Operation control function by the indoor control ........... 2. SYSTEM TROUBLESHOOTING PROCEDURE ........

  • Page 3: Outline Of Operation Control By Mycrocomputer

    '23 • KX-SM-445 '16 • PAC-T-251 '16 • PAC-T-251 1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 1.10.1 Remote control 1.10.1 Remote control 1.1 Remote control (Option parts) (1) Wired remote control Wired remote control Wired remote control...
  • Page 4 '16 • PAC-T-251 '23 • KX-SM-445 (b) 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 5: Operation Section

    '16 • PAC-T-251 '23 • KX-SM-445 (2) Wireless remote control Wireless remote control Model 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 6: Operation Control Function By The Wired Remote Control

    '23 • KX-SM-445 1.2 Operation control function by the wired remote control 1.10.2 Operation control function by the wired remote control (1) Model RC-EX3D (a) Switching sequence of the operation mode switches of remote control (i) Tap the change operation mode button on the TOP screen. (ii) When the change operation mode screen is displayed, tap the button of desired mode.

  • Page 7: Run/Stop Switch

    Touch panel calibration 前ペー ジ Previous Back Back Select the item. Select the item. '23 • KX-SM-445 The selected screen is The selected screen is displayed. displayed. (d) Power failure compensation function (Electric power source failure) Enable the Auto-restart function from the remote control as follows. TOP screen Menu Service setting...
  • Page 8 However, the stop position (4-position) is cancelled so that it returns to Position (1). “Remote control function items” which have been set with the administrator or installation function settings (“Indoor function items” are saved in the memory of indoor unit.) Weekly timer, peak-cut timer or silent mode timer settings '23 •...
  • Page 9 '23 • KX-SM-445 (2) Model RC-E5 (a) Switching sequence of the operation mode switches of remote control COOL HEAT AUTO (b) 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 '23 • KX-SM-445 (3) Operation and setting from wired remote control <Availability of setting/operation on standard remote controls> <Note of “eco-Touch Remote Control”> ○：Nearly same function setting and operations are possible. Blank column: Standard remote controls have not A : Refer to the instruction manual for RC-EX series C : Loading a utility software via Internet △：Similar function setting and opperations are possible.
  • Page 11 '23 • KX-SM-445 Setting ＆ display item Description RC-EX3D RC-E5 ・Permission/Prohibition setting of operation can be set. [On/Off] 2 Administrator settings Permission/Prohibition setting [Change set temp] [Change operation mode] [Change flap direction] [Change fan speed] [High power operation] △ [Administrator password] [Energy-saving operation] [Timer] Request for administrator can be set.
  • Page 12 '23 • KX-SM-445 Setting ＆ display item Description RC-EX3D RC-E5 IU address Max 16 indoor units can be connected to one remote control, and all address No. of the connected indoor units can be displayed. 4 Service & Maintenance ・ The indoor unit conforming to the address No. can be identified by selecting the address No. and tapping [Check] to operate the ○...

  • Page 13: Operation Control Function By The Indoor Control

    '23 • KX-SM-445 1.3 Operation control function by the indoor control (1) Operations of functional items during cooling/heating Cooling Heating Operation Dehumidifying Thermostat Thermostat Thermostat Thermostat Hot start (Defrost) Functional item Compressor Í Í Í /Í (Í) 4-way valve Í Í...
  • Page 14 '23 • KX-SM-445 (v) Set OFF timer by clock Set the time to stop operation. The time can be set in the unit of 5-minute. This setting can be switched only once or daily. Note It is necessary to set the clock to use this timer. (vi) Weekly timer Set the ON or OFF timer for a week.
  • Page 15 '23 • KX-SM-445 a) Thermostat OFF i) Operates according to the fan control setting at heating thermostat OFF. ii) Even if it changes from thermostat OFF to ON, the fan continues to operate with the fan control at thermostat OFF till the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 35°C or higher. iii) When the heat exchanger temperature sensor (Thi-R1 or R2, whichever higher) detects 35°C or higher, the fan operates with the set air flow volume.

  • Page 16: Thermostat Operation

    '23 • KX-SM-445 (iii) Louver free stop control If you touch the “Menu” → “Service setting” → “R/C function settings” → “Service password” buttons one after another on the TOP screen of remote control, the “Upper / lower flap control” screen is displayed. If the free stop is selected on this screen, the louver motor stops upon receipt of the stop signal from the remote control.
  • Page 17 '23 • KX-SM-445 (c) Fan control during heating thermostat OFF (i) Following fan controls during the heating thermostat OFF can be selected with the indoor function setting of the wired remote control. ① Low fan speed (Factory default) ② Set fan speed ③ Intermittence ④ Fan OFF (ii) When the “Low fan speed (Factory default)”...

  • Page 18: Filter Sign

    '23 • KX-SM-445 (8) Filter sign As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours , “FILTER CLEANING” is displayed on the remote control. (This is displayed when the unit is in trouble and under the central control, regardless of ON/OFF) Notes (1) Time setting for the filter sign can be made as shown below using the indoor function of wired remote control “Filter sign”.

  • Page 19: Cooling, Dehumidifying Frost Protection

    '23 • KX-SM-445 (11) Drain pump abnormalities detection (Except FDUH series) (a) Drain detection switch is turned ON or OFF with the float switch (FS) and the timer. Drain detection switch ON Normal state Normal state [*1] [*2] [ ＊ 1] Drain detection switch is turned “ON” when the float switch “Open” is detected for 3 seconds continuously in the drain detectable space.
  • Page 20 Item Temperature - Low (Factory default) Temperature - High '23 • KX-SM-445 Note (1) Frost prevention temperature setting can be selected with the indoor unit function setting of the wired remote control. (15) Heating overload protection If the indoor heat exchanger temperature (detected with Thi-R) at 63°C or higher is detected for 2 seconds continuously, •...
  • Page 21 '16 • PAC-T-251 '23 • KX-SM-445 '16 • PAC-T-251 '16 • PAC-T-251 '16 • PAC-T-251 (16) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection (17) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection Broken wire detection (a) Broken wire detection (16) Abnormal temperature sensor (return air/indoor heat exchanger) broken wire/short-circuit detection If the return air temperature sensor detects broken wire for 5 seconds continuously, the compressor stops (E7).
  • Page 22 '23 • KX-SM-445 (b) Input for external control The external input for the indoor unit can be selected from the following input by the wired remote control. The input connectors (CnT-6 and CnTA) are equipped on the indoor unit control PCB. “LEVEL INPUT(Factory default)”...
  • Page 23 available*(1) *(1) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Level input (Factory default)”; '23 • KX-SM-445 ① When card key switch is ON (CnT-6 or CnTA ON: Operation permission), start/stop operation of the unit from the wired remote control becomes available.

  • Page 24: Selection Of Cooling/Heating External Input Function

    Actual operation Stop Stop Stop Stop '23 • KX-SM-445 Remote control Remote Remote Remote control OFF control ON control ON Note If it is prohibited by CnT, all “Operation” and “Stop” commands are not accepted. (f) In case of CnT ② Operation stop pulse + CnTA ③ Operation permission/prohibition level ③...
  • Page 25 '23 • KX-SM-445 (c) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote control. ■ Selection of cooling/heating external input function External input External input Operation selection method External input (CnT or CnTA) Cooling zone Heating zone...
  • Page 26 '23 • KX-SM-445 (25) High power operation (RC-EX3D only) It operates at with the setting temperature fixed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15 minutes maximum. (26) Energy-saving operation (RC-EX3D only) It operates with the setting temperature fixed at 28°C for cooling, 22°C for heating or 25°C for auto. When fan control in cooling/ heating thermo-OFF setting is “Set fan speed”, fan speed during thermo-OFF is changed to “Low”.
  • Page 27 In order to reach the room temperature to the set temperature as quickly as possible, the air flow rate is increased when the set temperature of thermostat differs largely from the return air temperature. According to temperature difference between set temperature and return air temperature, indoor fan tap are controlled automalically.
  • Page 28 Back Select the item. '23 • KX-SM-445 RCN-E2 1. Set indoor functions ① Press the ON/OFF button to stop the unit. ② Press the desired one of the buttons shown item 2. while holding down the ① ② FUNCTION SETTING switch. ②...
  • Page 29 '23 • KX-SM-445 (36) Control mode & Eco level (RC-EX3D only) Automatically controls the capacity depending on set temperature by the remote control and the actual room temperature. By selecting "Control mode" and "Eco level" respectively, energy-saving operation is performed according to the installation status of the unit.

  • Page 30: System Troubleshooting Procedure

    '23 • KX-SM-445 2. SYSTEM TROUBLESHOOTING PROCEDURE 2.1 Basics of troubleshooting Basic troubleshooting is to check/analyze/save data by connecting the Mente PC. Whenever arriving at the site, always connect the Mente PC before starting work. Method of error data analysis (Basic procedure) •...

  • Page 31: Contents Of Troubleshooting

    '23 • KX-SM-445 2.2 Contents of troubleshooting (a) List of inspection displays Remote 7-segment control Name of inspection Classification Page display error code None – Operates but does not cool. System error None – Operates but does not heat. System error Improper installation None –...
  • Page 32 '23 • KX-SM-445...
  • Page 33 '23 • KX-SM-445...

  • Page 34: Operates But Does Not Cool

    '23 • KX-SM-445 (b) Troubleshooting Green Error code Content Keeps flashing Stays Off Indoor None Remote control: Operates but does not cool. (1/2) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation. Check the temperature difference between return and supply air of indoor unit.
  • Page 35 '23 • KX-SM-445 (b) Troubleshooting Green Error code Content Keeps flashing Stays Off Indoor None Remote control: Operates but does not cool. (2/2) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Check the followings.

  • Page 36: Operates But Does Not Heat

    '23 • KX-SM-445 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Operates but does not heat. (1/2) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check the indoor fan operation Check the temperature difference between return and supply air of indoor unit It is normal.
  • Page 37 '23 • KX-SM-445 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Operates but does not heat. (2/2) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page Is the Check the followings.

  • Page 38: Excessive Noise/Vibration

    '23 • KX-SM-445 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (1/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure If excessive noise/vibration persists when sufficient time has elapsed after Does noise/ vibration occur during stopping the unit, it is...
  • Page 39 '23 • KX-SM-445 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (2/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 1/3 Rearrange the piping to Are the pipes avoid contact with the contacting with the casing.

  • Page 40: All Models

    '23 • KX-SM-445 Green Error code Content – – Indoor Remote control: None Excessive noise/vibration (3/3) 7-segment display: – – Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From 2/3 If insufficient cooling/ [Adjustment heating problem happens during commissioning] due to anomalous operating Does noise/vibration occur when the conditions at cooling/...
  • Page 41 '23 • KX-SM-445 Green Error code Content Keeps flashing Stays Off Indoor Remote control: None Louver motor anomaly 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDTW, FDTS, FDTQ series Diagnosis Countermeasure ˜Check at the indoor unit side. Operate after waiting for more than 1 minute.
  • Page 42 '23 • KX-SM-445 Green Error code Content Power source system anomaly Stays Off Stays Off Indoor Remote control: None (Power source to indoor unit PCB) 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model See note. Diagnosis Countermeasure AC 220-240V/220V detected between L-N on...
  • Page 43 '23 • KX-SM-445 Green Error code Content Power source system error Keeps flashing 3-time flash Indoor Remote control: None (Power source to remote control) 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model See note. Diagnosis Countermeasure Is the connection of the Correct it.

  • Page 44: Applicable Model

    '23 • KX-SM-445 Green Error code Content Indoor Remote control: Keeps flashing Stays Off WAIT WAIT 7-segment display: Outdoor Keeps flashing 2-time flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case that is kept WAIT on displaying on the remote control for more than 2 is kept on WAIT...
  • Page 45 '23 • KX-SM-445 Green Error code Content Keeps flashing Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of fuse blown, how to check the inverter before replacement of fuse) there any short-circuit between phases of noise...
  • Page 46 '23 • KX-SM-445 Green Error code Content Keeps flashing Stays Off Indoor Remote control: WAIT WAIT 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON) No display on the remote control after power ON Does...
  • Page 47 '23 • KX-SM-445 Green Error code Content Stays OFF Stays Off Indoor 〔 No display 〕 Remote control: [No display] 7-segment display: Stays OFF Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (No display on the remote control after power ON) No display on the remote control after power ON...
  • Page 48 '23 • KX-SM-445 Green Error code Content Remote control Stays Off Indoor Remote control: communication error 7-segment display: Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is it possible to Malfunction by noise reset normally by the power Check peripheral source reset? environment.
  • Page 49 '23 • KX-SM-445 Green Error code Content Keeps flashing 1-time flash Indoor Remote control: Duplicated indoor unit address 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the number of Review number of connected indoor units up connected units.
  • Page 50 '23 • KX-SM-445 Green Error code Content Keeps flashing 2-time flash Indoor Remote control: E3/5 Outdoor unit signal line error 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E3 is a communication error that occurs when communication between indoor and outdoor units is not established at all.

  • Page 51: Communication Error During Operation

    '23 • KX-SM-445 Green Error code Content Keeps flashing *See below Indoor Remote control: Communication error during operation 7-segment display: Keeps flashing 2-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure * In case that indoor unit red LED flashes 2 times Note (1) Check the connection (disconnection, looseness) of signal wires at outdoor unit terminal block Is the...

  • Page 52: Indoor Heat Exchanger

    '23 • KX-SM-445 Green Indoor heat exchanger Error code Content Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-R) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected properly ?

  • Page 53: Indoor Air

    '23 • KX-SM-445 Green Indoor air Error code Content Keeps flashing 1-time flash Indoor Remote control: temperature sensor anomaly (Thi-A) 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected securely.

  • Page 54: Drain Trouble

    '23 • KX-SM-445 Green Error code Content Keeps flashing 1-time flash Indoor Remote control: Drain trouble 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model FDTW, FDTS, FDTQ series Diagnosis Countermeasure Check the error data in the remote control. Is there any overflow? Is DC 12V detected at CnI...
  • Page 55 '23 • KX-SM-445 Green Error code Content Excessive number of indoor units (moe than 17 units) Keeps flashing Stays Off Indoor Remote control: by controlling one remote control 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
  • Page 56 '23 • KX-SM-445 Green Green Content Error code Error code Content Address setting error Address setting error Keeps flashing Stays OFF Indoor Remote control: Remote control: of indoor units master and slave indoor units Indoor Keeps flashing Keeps flashing 7-segment display:- Keeps flashing Stays OFF Outdoor 5.
  • Page 57 '23 • KX-SM-445 Green Error code Content Address setting error Keeps flashing 1-time flash Indoor Remote control: by mixed setting method 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the automatic setting and Review address setting.
  • Page 58 '23 • KX-SM-445 Green Error code Content Indoor DC fan motor anomaly Keeps flashing 1-time flash Indoor Remote control: (FDT, FDTC, FDK series) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model FDTW, FDTS series Diagnosis Countermeasure Does any foreign material Remove foreign material.
  • Page 59 '23 • KX-SM-445 Green Content Error code Address setting error of Indoor Remote control: Keeps flashing 1-ime flash main and sub indoor units 7-segment display:- Outdoor Keeps flashing Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is the indoor unit connected to the shut-off valve Set the indoor unit connected to set as the main indoor unit?
  • Page 60 '23 • KX-SM-445 Green Error code Content Indoor unit operation check, Keeps flashing 1-time flash Indoor Remote control: drain pump motor check mode anomaly 7-segment display: Keeps flashing Stays Off Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure E19 occurs when the power ON.
  • Page 61 '23 • KX-SM-445 Green Content Error code Indoor DC fan motor rotation speed Keeps flashing 1(2)-time flash Indoor Remote control: anomaly 7-segment display:- Keeps flashing Stays OFF Outdoor Note Value in ( ) is for FM2. 5. Troubleshooting 1. Applicable model FDTW, FDTS series Diagnosis Countermeasure...
  • Page 62 '23 • KX-SM-445 '21 • KX-T-378 Green Error code Content Indoor 1-time flash Remote control: Refrigerant leakage 7-segment display: -/oPE09 Outdoor Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Refrigerant may be leaking. Ventilate the air in the room. Can the detector operation be stopped with push button?
  • Page 63 '23 • KX-SM-445 '21 • KX-T-378 Green Error code Content Indoor Stays OFF Remote control: Other indoor unit detected refrigerant leakage 7-segment display: -/oPE09 Outdoor Stays OFF 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Locate the remote control on which E23 is displayed, Identify the indoor unit on which E23 is displayed.
  • Page 64 '23 • KX-SM-445 Green Content Error code Remote control Keeps flashing Stays OFF Indoor Remote control: temperature sensor anomaly (Thc) 7-segment display:- Keeps flashing Stays OFF Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure the connector of Insert the connector temperature sensor connected securely.

  • Page 65: Emergency Stop

    '23 • KX-SM-445 Green Content Error code Keeps flashing Stays OFF Indoor Emergency stop Remote control: 7-segment display: Keeps flashing 1-time flash Outdoor 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Check and save the data of operating conditions. Save data for 30 minutes before stopping in Mente PC.

  • Page 66: Instruction Of How To Replace Pcb

    '23 • KX-SM-445 2.3 Instruction of how to replace PCB (1) Control PCB (a) FDTW, FDTS series PSB012D991B SAFETY PRECAUTIONS ● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ●...
  • Page 67 '23 • KX-SM-445 3) Replace the PCB a) Exchange PCB after detaching all connectors connected with the PCB. b) Fix the PCB so as not to pinch the wirings. c) Connect connectors to the PCB. Match the wiring connector to the connector color on the PCB and connect it. d) Match the setting switches (include "J1") with the former PCB.
  • Page 68 '23 • KX-SM-445 (b) FDTQ, FDUH series PSB012D975M SAFETY PRECAUTIONS Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ● The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. ●...

  • Page 69: Power Pcb

    '23 • KX-SM-445 (2) Power PCB (a) FDTW series PSB012D992 SAFETY PRECAUTIONS ● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ● The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. Both mentions the important items to protect your health and safety so strictly follow them by any means.
  • Page 70 '23 • KX-SM-445 (b) FDTS series PSB012D992 SAFETY PRECAUTIONS ● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the replacement in order to protect yourself. ● The precautionary items mentioned below are distinguished into two levels, WARNING and CAUTION. Both mentions the important items to protect your health andsafety so strictly follow them by any means.

  • Page 71: Fuse List

    '23 • KX-SM-445 2.4 Fuse list (1) FDTW series Fuse position Fuse only Parts that may fail References in the replaceable when the fuse is blown(*1) Service Manual(*2) Group Details Ref No. For communication ・ PCB1 in I/U E1:Remote control communication error between I/U and O/U (Replace the PCB.) ・...
  • Page 72 '23 • KX-SM-445 (2) FDTS series Fuse position Fuse only Parts that may fail References in the replaceable when the fuse is blown(*1) Service Manual(*2) Group Details Ref No. For communication ・ PCB1 in I/U E1:Remote control communication error between I/U and O/U (Replace the PCB.) ・...
  • Page 73 '23 • KX-SM-445 (3) FDTQ series Fuse position Fuse only Parts that may fail References in the replaceable when the fuse is blown(*1) Service Manual(*2) Group Details Ref No. For communication ・ PCB in I/U E1:Remote control communication error between I/U and O/U (Replace the PCB.) ・...
  • Page 74 '23 • KX-SM-445 (4) FDUH series Fuse position Fuse only Parts that may fail References in the replaceable when the fuse is blown(*1) Service Manual(*2) Group Details Ref No. For communication ・ PCB in I/U E1:Remote control communication error between I/U and O/U (Replace the PCB.) ・...

  • Page 75: Indoor Pcb Setting

    '23 • KX-SM-445 2.5 Indoor PCB setting (1) FDTW, FDTS series Code Input Default setting Remarks Indoor unit address No.(Order of 10) Indoor unit address No.(Order of 1) Outdoor unit address No.(Order of 10) Outdoor unit address No.(Order of 1) SW5-1 Superlink selection Automatic*/Previous SL...

  • Page 76: Electrical Wiring

    '23 • KX-SM-445 3. ELECTRICAL WIRING (1) Ceiling cassette-2 way type (FDTW) Models FDTW28KXZE3-W, 45KXZE3-W, 56KXZE3-W, 71KXZE3-W PJB001Z899...
  • Page 77 '23 • KX-SM-445 Models FDTW90KXZE3-W, 112KXZE3-W, 140KXZE3-W PJB001Z900...
  • Page 78 '23 • KX-SM-445 (2) Ceiling cassette-1 way type (FDTS) Models FDTS45KXZE3-W, 71KXZE3-W PJC001Z503...
  • Page 79 '23 • KX-SM-445 (3) Ceiling cassette-1 way compact type (FDTQ) (a) Direct blow type All models PJC001Z509...
  • Page 80 '23 • KX-SM-445 (b) Duct type All models PJC001Z510...
  • Page 81 '23 • KX-SM-445 (4) Duct connected-Compact and flexible type (FDUH) All models PJC001Z514...
  • Page 82 MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. 2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, 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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